Altera High-Definition Multimedia Interface IP Core User Guide · Altera High-Definition Multimedia Interface IP Core User Guide Subscribe Send Feedback UG-HDMI 2014.12.15 101 Innovation

Altera High-Definition MultimediaInterface IP Core User Guide

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Contents

Altera High-Definition Multimedia Interface Quick Reference........................1-1

Altera High-Definition Multimedia Interface Overview................................... 2-1Resource Utilization.................................................................................................................................... 2-4

Altera High-Definition Multimedia Interface Getting Started......................... 3-1Installing and Licensing IP Cores.............................................................................................................. 3-1OpenCore Plus IP Evaluation.................................................................................................................... 3-2Specifying IP Core Parameters and Options............................................................................................3-2

Altera High-Definition Multimedia Interface Source....................................... 4-1Source Functional Description.................................................................................................................. 4-1

Source TMDS/TERC4 Encoder..................................................................................................... 4-2Source Video Resampler................................................................................................................. 4-2Source Window of Opportunity Generator................................................................................. 4-3Source Auxiliary Packet Encoder...................................................................................................4-4Source Auxiliary Packet Generators..............................................................................................4-6Source Auxiliary Data Path Multiplexers..................................................................................... 4-6Source Auxiliary Control Port....................................................................................................... 4-6Source Audio Encoder.................................................................................................................. 4-10

Source Parameters..................................................................................................................................... 4-11Source Interfaces........................................................................................................................................ 4-12Source Clock Tree......................................................................................................................................4-16

Altera High-Definition Multimedia Interface Sink........................................... 5-1Sink Functional Description.......................................................................................................................5-1

Sink Channel Word Alignment and Deskew...............................................................................5-2Sink TMDS/TERC4 Decoder......................................................................................................... 5-3Sink Video Resampler..................................................................................................................... 5-4Sink Auxiliary Decoder................................................................................................................... 5-5Sink Auxiliary Packet Capture....................................................................................................... 5-6Sink Auxiliary Data Port...............................................................................................................5-10Sink Audio Decoding.................................................................................................................... 5-13

Sink Parameters..........................................................................................................................................5-13Sink Interfaces............................................................................................................................................ 5-14Sink Clock Tree.......................................................................................................................................... 5-18

Altera High-Definition Multimedia Interface Hardware Demonstration........6-1HDMI Hardware Demonstration Requirements.................................................................................... 6-2

TOC-2

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Demonstration Walkthrough.....................................................................................................................6-4Set Up the Hardware....................................................................................................................... 6-4Copy the Design Files...................................................................................................................... 6-5Build the Design............................................................................................................................... 6-7View the Results............................................................................................................................... 6-7

Altera High-Definition Multimedia Interface Simulation Example................. 7-1Simulation Walkthrough............................................................................................................................ 7-2

Additional Information for High-Definition Multimedia Interface UserGuide............................................................................................................... A-1

Document Revision History for High-Definition Multimedia Interface User Guide.......................A-1How to Contact Altera............................................................................................................................... A-1

TOC-3

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Altera High-Definition Multimedia InterfaceQuick Reference 1

2014.12.15

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The Altera High-Definition Multimedia Interface (HDMI) IP core provides support for next-generationvideo display interface technology.

Release Information

Version 14.1Release December 2014Ordering Code IP-HDMIProduct ID 0121Vendor ID 6AF7

© 2014 Altera Corporation. All rights reserved. ALTERA, ARRIA, CYCLONE, ENPIRION, MAX, MEGACORE, NIOS, QUARTUS and STRATIX words and logos aretrademarks of Altera Corporation and registered in the U.S. Patent and Trademark Office and in other countries. All other words and logos identified astrademarks or service marks are the property of their respective holders as described at www.altera.com/common/legal.html. Altera warrants performanceof its semiconductor products to current specifications in accordance with Altera's standard warranty, but reserves the right to make changes to anyproducts and services at any time without notice. Altera assumes no responsibility or liability arising out of the application or use of any information,product, or service described herein except as expressly agreed to in writing by Altera. Altera customers are advised to obtain the latest version of devicespecifications before relying on any published information and before placing orders for products or services.

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IP Core Information

Core Features • Conforms to the High-Definition MultimediaInterface (HDMI) specification version 1.4b

• Supports transmitter and receiver on a singledevice transceiver quad

• Supports 8-bit video• Supports pixel clocks up to 340MHz• Supports RGB and YCbCr color modes• Accepts standard H-SYNC, V-SYNC, data enable,

and RGB video formats• Compatible with DVI and dual link DVI• Supports 2-channel audio• Supports single or double pixel-per-clock

Typical Application • Interfaces within a PC and monitor• External display connections, including interfaces

between a PC and monitor or projector, betweena PC and TV, or between a device such as a DVDplayer and TV display

Device Family Supports Arria V and Stratix V FPGA devicesDevice Tools • Quartus II software for IP design instantiation

and compilation• TimeQuest Timing Analyzer in the Quartus II

software for timing analysis• ModelSim-Altera/SE software for design

simulation

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Altera High-Definition Multimedia InterfaceOverview 2

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The Altera High-Definition Multimedia Interface (HDMI) IP core provides support for next generationvideo display interface technology.

The HDMI standard specifies a digital communications interface for use in both internal and externalconnections:

• Internal connections—interface within a PC and monitor• External display connections—interface between a PC and monitor or projector, between a PC and

TV, or between a device such a DVD player and TV display.

The HDMI system architecture consists of sinks and sources. A device may have one or more HDMIinputs and outputs.

The HDMI cable and connectors carry four differential pairs that make up the Transition MinimizedDifferential Signaling (TMDS) data and clock channels. You can use these channels to carry video, audio,and auxiliary data.

The HDMI also carries a Video Electronics Standards Association (VESA) Display Data Channel (DDC).The DDC configures and exchanges status between a single source and a single sink. The source uses theDDC to read the sink's Enhanced Extended Display Identification Data (E-EDID) to discover the sink'sconfiguration and capabilities.

The optional Consumer Electronics Control (CEC) protocol provides high-level control functionsbetween various audio visual products in your environment.

The optional HDMI Ethernet and Audio Return Channel (HEAC) provides Ethernet compatible datanetworking between connected devices and an audio return channel in the opposite direction of TMDS.The HEAC also uses Hot-Plug Detect (HPD) line for signal transmission.





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Figure 2-1: Altera HDMI Block Diagram

The figure below illustrates the blocks in the Altera HDMI IP core.

HDMITransmitter

HDMIReceiver

TDMS Channel 0

TDMS Channel 1

TDMS Channel 2

TDMS Clock Channel

Video

Audio

Control/Status

Video

Audio

Control/Status

Detect

CEC

HEAC

EDID ROM

CEC

HEAC

CEC Line

Utility Line

HPD Line

Display Data Channel (DDC)

High/Low

Based on TMDS encoding, the HDMI protocol allows the transmission of both audio and video databetween source and sink devices.

An HDMI interface consists of three color channels accompanied by a single clock channel. You can useeach color line to transfer both individual RGB colors and auxiliary data.

The receiver uses the TMDS clock as a frequency reference for data recovery on the three TMDS datachannels. This clock typically runs at the video pixel rate.

TMDS encoding is based on an 8-bit to 10-bit algorithm. This protocol attempts to minimize data channeltransmission and yet maintain sufficient bandwidth so that a sink device can lock reliably to the datastream.

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Figure 2-2: HDMI Video Stream Data

Active Video

Data

Islan

dPr

eam

ble

Activ

eAu

x/Au

dio

Video

Prea

mble Active Video

VideoGuardBand

VideoGuardBand

Data IslandGuardBand

vid_de

aux_de

Video Guard BandCase (TMDS Channel Number):0:q_out[9:0] = 10’b1011001100;1:q_out[9:0] = 10’b0100110011;2:q_out[9:0] = 10’b1011001100;endcase

Video Preamble{c3, c2, c1, c0} = 4’b0001

Data Island Guard BandCase (TMDS Channel Number):0:q_out[9:0] = 10’bxxxxxxxxxx;1:q_out[9:0] = 10’b0100110011;2:q_out[9:0] = 10’b0100110011;endcase

Video Preamble{c3, c2, c1, c0} = 4’b0101

The figure above illustrates two data streams:

• Data stream in green—transports color data• Data stream in dark blue—transports auxiliary data

Table 2-1: Video Data and Auxiliary Data

The table below describes the function of the video data and auxiliary data.Data Description

Video data • Packed representation of the video pixels clocked at the source pixel clock.• Encoded using the TMDS 8-bit to 10-bit algorithm.

Auxiliary data • Transfers audio data together with a range of auxiliary data packets.• Sink devices use auxiliary data packets to correctly reconstruct video and

audio data.• Encoded using the TMDS Error Reduction Coding–4 bits (TERC4)

encoding algorithm.

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Each data stream section is preceded with guard bands and pre-ambles. These allow for accurate synchro‐nization with received data streams.

Resource UtilizationThe resource utilization data indicates typical expected performance for the HDMI IP core device.

Table 2-2: HDMI Resource Utilization

The table lists the performance data for the HDMI IP core targeting Arria V GX and Stratix V devices.

Device TransceiverInterface (bits) Direction ALMs

Logic Registers Memory

Primary Secondary Bits M10K or M20K

Arria V GX

10 RX 1394 2262 244 2080 5

20 RX 1911 2800 270 3136 5

10 TX 1329 1934 91 4488 7

20 TX 1866 2763 184 5626 5

Stratix V

10 RX 1398 2258 220 2080 5

20 RX 1881 2743 319 3136 5

10 TX 1416 1950 84 3976 4

20 TX 1872 2762 183 5626 6

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Altera High-Definition Multimedia InterfaceGetting Started 3

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This chapter provides a general overview of the Altera IP core design flow to help you quickly get startedwith the HDMI IP core. The Altera IP Library is installed as part of the Quartus II installation process.You can select and parameterize any Altera IP core from the library. Altera provides an integratedparameter editor that allows you to customize the HDMI IP core to support a wide variety of applications.The parameter editor guides you through the setting of parameter values and selection of optional ports.

Installing and Licensing IP CoresThe Quartus II software includes the Altera IP Library. The library provides many useful IP corefunctions for production use without additional license. You can fully evaluate any licensed Altera IP corein simulation and in hardware until you are satisfied with its functionality and performance. The HDMIIP core is part of the Altera MegaCore IP Library, which is distributed with the Quartus II software anddownloadable from the Altera web site.

Figure 3-1: HDMI Installation Path

Installation directory

ip - Contains the Altera IP Library

altera - Contains the Altera IP Library source code

altera_hdmi - Contains the HDMI IP core files

Note: The default IP installation directory on Windows is <drive>:\altera\<version number>; on Linux it is<home directory>/altera/ <version number>.

After you purchase a license for the HDMI IP core, you can request a license file from the Altera'slicensing site and install it on your computer. When you request a license file, Altera emails you alicense.dat file. If you do not have Internet access, contact your local Altera representative.

Related Information

• Altera Licensing Site• Altera Software Installation and Licensing Manual





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OpenCore Plus IP EvaluationAltera's free OpenCore® Plus feature allows you to evaluate licensed MegaCore® IP cores in simulationand hardware before purchase. You need only purchase a license for MegaCore IP cores if you decide totake your design to production. OpenCore Plus supports the following evaluations:

• Simulate the behavior of a licensed IP core in your system.• Verify the functionality, size, and speed of the IP core quickly and easily.• Generate time-limited device programming files for designs that include IP cores.• Program a device with your IP core and verify your design in hardware

OpenCore Plus evaluation supports the following two operation modes:

• Untethered—run the design containing the licensed IP for a limited time.• Tethered—run the design containing the licensed IP for a longer time or indefinitely. This requires a

connection between your board and the host computer.

Note: All IP cores that use OpenCore Plus time out simultaneously when any IP core in the design timesout.

Specifying IP Core Parameters and OptionsFollow these steps to specify the HDMI IP core parameters and options.

1. Create a Quartus II project using the New Project Wizard available from the File menu.2. On the Tools menu, click IP Catalog.3. Under Installed IP, double-click Library > Interface > Protocols > Audio&Video > HDMI.

The parameter editor appears.4. Specify a top-level name for your custom IP variation. This name identifies the IP core variation files

in your project. If prompted, also specify the targeted Altera device family and output file HDLpreference. Click OK.

5. Specify parameters and options in the HDMI parameter editor:

• Optionally select preset parameter values. Presets specify all initial parameter values for specificapplications (where provided).

• Specify parameters defining the IP core functionality, port configurations, and device-specificfeatures.

• Specify options for generation of a timing netlist, simulation model, testbench, or example design(where applicable).

• Specify options for processing the IP core files in other EDA tools.6. Click Generate to generate the IP core and supporting files, including simulation models.7. Click Close when file generation completes.8. Click Finish.9. If you generate the HDMI IP core instance in a Quartus II project, you are prompted to add Quartus II

IP File (.qip) and Quartus II Simulation IP File (.sip) to the current Quartus II project.

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Altera High-Definition Multimedia InterfaceSource 4

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Source Functional DescriptionThe HDMI source core provides direct connection to the Transceiver Native PHY through a 10-bit or 20-bit parallel data path.

Figure 4-1: HDMI Source Signal Flow Diagram

The figure below shows the flow of the HDMI source signals. The figure shows the various clockingdomains used within the core.

TMDS Data

audio_clkvid_clkls_clk

Clock Domains

TMDS/TERC4Encoder

WOPGenerator

VideoResampler

AuxiliaryPacket Encoder

Auxiliary PacketGenerator



CC

DefaultGCP

Default AVInfoframe

Default VSIInfoframe


mode

vid_clk

VideoInput

Override GCP

OverrideAV

OverrideVSI

AuxiliaryData Port

AudioEncoder

Audio Port

1

aux_de

color-depth

pp

V-SYNC

Video Data Port

Auxiliary ControlPort

Multiplexer

Multiplexer

The source core provides four 10-bit or 20-bit data paths corresponding to the 3 color channels and theclock channel.





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The source core accepts video, audio, and auxiliary channel data streams. The core produces a TMDS/TERC4 encoded data stream that would typically connect to the high-speed transceiver parallel datainputs.

Central to the core is the TMDS/TERC4 encoder. The encoder processes either video or auxiliary data.

Source TMDS/TERC4 EncoderThe source TMDS/TERC4 encoder implements 8-bit to 10-bit and 4-bit to 10-bit algorithmsas defined in the HDMI Specification Ver.1.4b. Each channel has its own encoder.

Figure 4-2: Source TMDS/TERC4 Encoder

The figure below shows the input and output for the TMDS/TERC4 encoder.

aux_de

vid_de

Auxiliary

Pixel

CTL0

CTL1

mode

TMDS/TERC4Encoder Channel Data

The encoder processes symbol data at 1 or 2 symbols per clock.

When the encoder operates in 2 symbols per clock, it also produces the output in the form of two encodedsymbols per clock.

The TMDS/TERC4 encoder also produces DVI signaling when you deassert the mode input signal. DVIsignaling is identical to HDMI signaling, except for the absence of data and video islands, and TERC4auxiliary data.

The CTL[1:0] inputs transmit control information to the sink. For the blue channel, CTL[0] sends thevertical sync signal and CTL[1] sends the horizontal sync signal.

Source Video ResamplerThe core resamples the video data based on the current color depth.

The video resampler consists of a gearbox and a dual-clock FIFO (DCFIFO).

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Figure 4-3: Source Video Resampler Signal Flow Diagram

The figure below shows the components of the video resampler and the signal flow between thesecomponents.

Pixel Data [bpp:0]

1

vid_clk

DCFIFO

ls_clk

data

wr

wrclk

q

rd

rdclk

de

H-SYNCV-SYNC

PhaseCounter

Gearbox Pixel Data [7:0]

H-SYNCV-SYNCde

Resampled

pp

bpp

The resampler adheres to the recommended phase encoding method described in HDMI SpecificationVer.1.4b.

• The phase counter must register the last packing-phase (pp) of the last pixel of the last active line.• The resampler then transmits the pp value to the attached sink device in the General Control Packet

(GCP) for packing synchronization.

Figure 4-4: Source Pixel Data Input Format RGB/YCbCr 4:4:4

The figure below shows the RGB color space pixel bit-field mappings.

47 32 31 16 15 0 vid_data[47:0]

24 bpp RGB/YCBCr444 (8 bpc)




Figure 4-5: Source Pixel Data Input Format YCbCr 4:2:2—12 bpc

The figure below shows the YCbCr color space pixel bit-field mappings.

31 24 15 12 11 8 vid_data[47:0]47 40

Y[3:0]Cb/Cr[11:4] Cb/Cr[3:0]Y[11:4]

The output from the resampler is a fixed 16 bits per color. When the resampler operates in lower colordepths, the low order bits are zero.

Source Window of Opportunity GeneratorThe source Window of Opportunity (WOP) generator creates valid data islands within the blankingregions.

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The WOP generator must generate a leading region sufficient enough to hold at least 12 symbol clocksand a trailing region of at least 2 symbol clocks.

The WOP generator must also have an integral number of auxiliary packet cycles: 24 clocks whenprocessing in 1-symbol mode and 2 clocks when processing in 2-symbols mode.

Figure 4-6: Typical Window of Opportunity

The figure below shows a typical output from the WOP generator.

ls_clk

de

H-SYNC

wop

Data IslandGuard Band

VideoGuard Band

Data Island

The output from the WOP generator is an aux_de signal propagated backwards through the auxiliarysignal path to provide backpressure.

Based on the HDMI Specification Ver.1.4b requirements, you cannot send more than 9 auxiliary (AUX)packets consecutively during a blanking region. The WOP generator deasserts the data enable line onevery tenth AUX packet to comply with this requirement.

Source Auxiliary Packet EncoderAuxiliary packets are encoded by the source auxiliary packet encoder.

The auxiliary packets originate from a number of sources, which are multiplexed into the auxiliary packetencoder in a round-robin schedule. The auxiliary packet encoder converts a standard stream into thechannel data format required by the TERC4 encoder.

The source propagates the WOP signal backwards through the stream ready signal.

Figure 4-7: Source Auxiliary Packet Encoder

clk

reset

valid

ready

sop

eop

data[71:0]

AuxiliaryPacket

EncoderChannel1[3:0]Channel2[3:0]

Channel0[3:0]

wop

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The auxiliary packet encoder also calculates and inserts the Bose-Chaudhuri-Hocquenghem (BCH) errorcorrection code.

Figure 4-8: Auxiliary Packet Encoder Input

The figure below shows the auxiliary packet encoder input from a 72-bit input data.

PB22

PB21

PB15

PB14

PB8

PB7

PB1

PB0

HB0

Phase 0

PB24

PB23

PB17

PB16

PB10

PB9

PB3

PB2

HB1

Phase 1

PB26

PB25

PB19

PB18

PB12

PB11

PB5

PB4

HB2

Phase 2

0

PB27

0

PB20

0

PB13

0

PB6

0

Phase 3

BCH Block 3

BCH Block 2

BCH Block 1

BCH Block 0

Input Data

Byte[8]

Byte[0]

0 - - 8 - - 16 - - 24

0 - - 4 - - 8 - - 12

Startofpacket

Endofpacket

Ready

Clock

Cycle 1 Symbol

Cycle 2 Symbol

Phase 0 Phase 1 Phase 2 Phase 3

The encoder assumes the data valid input will remain asserted for the duration of a packet to complete. Apacket is always 24 clocks (in 1 symbol mode) or 12 clocks (in 2 symbols mode).

The encoder creates a NULL auxiliary packet if it doesn't detect a start-of-packet at the beginning of apacket boundary. In this case, you can consider the output of the encoder as a stream of NULL packetsunless a valid packet is available.

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Figure 4-9: Typical Auxiliary Packet Stream During Blanking Interval

The figure below shows a typical auxiliary packet stream in 1-symbol per clock mode, where 0 denotes anull packet.

wop

0 0 0 0 AVI 0 AI VSI 0 0 0

0 23 47 71

Auxiliary Packet

Clock Cycle

AVI = Auxiliary Video InfoframeAI = Audio Information InfoframeVSI = Vendor Specific Infoframe

.......

Ninth PacketSkipped

Source Auxiliary Packet GeneratorsThe source core uses various auxiliary packet generators. The packet generators convert the packet fieldinputs to the auxiliary packet stream format.

Figure 4-10: Auxiliary Packet Generator

clk

reset

valid

ready

HB[3:0]

PB[27:0]

AuxiliaryPacket

Generator

valid

ready

sop

eop

data[71:0]

The packet generator propagates backpressure from the output ready signal to the input ready signal. Thegenerator normally asserts the input valid signal when a packet is ready to be transmitted. The input validsignal remains asserted until the generator receives a ready acknowledgement.

Source Auxiliary Data Path MultiplexersThe auxiliary data path multiplexers provide paths for the various auxiliary packet generators.

The various auxiliary packet generators traverse a multiplexed routing path to the auxiliary packetencoder. The multiplexers obey a round-robin schedule and propagate backpressure.

Source Auxiliary Control PortTo simplify the user logic, the source core has control ports to send the most common auxiliary controlpackets.

These packets are: General Control Packet, Auxiliary Video Information (AVI) InfoFrame, HDMIVendor Specific InfoFrame (VSI), and Audio InfoFrame.

The core sends the default values in the auxiliary packets. The default values allow the core to send videodata compatible with the HDMI Specification Ver.1.4b with minimum description.

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You can also override the generators using the customized input values. The override values replace thedefault values when the input checksum is non-zero.

The core sends the auxiliary control packets on the active edge of the V-SYNC signal to ensure that thepackets are sent once per field.

Source General Control Packet

Table 4-1: Source General Control Packet Input Fields

The table below lists the bit-fields for the Source General Control Packet port.Bit Field Name Comment

gcp[3:0]ColorDepth(CD)

CD3 CD2 CD1 CD0 Color depth (24 bpponly)

0 0 0 0 Color depth notindicated

0 0 0 1 Reserved

0 0 1 0 Reserved

0 0 1 1 Reserved

0 1 0 0 24 bpp

0 1 0 1 30 bpp

0 1 1 0 36 bpp

0 1 1 1 48 bpp

1 1 1 1 Reserved

gcp[4] Set_AVMUTE

Refer to HDMI Specification Ver.1.4b.

gcp[5] Clear_AVMUTE

Refer to HDMI Specification Ver.1.4b.

All other fields for the source GCP are calculated automatically inside the core.

Source Auxiliary Video Information (AVI) InfoFrameThe HDMI core produces the captured AVI InfoFrame to simplify user applications.

Table 4-2: Auxiliary Video Information (AVI) InfoFrame

The table below lists the bit-fields for the AVI InfoFrame port bundle.

The signal bundle is clocked by ls_clk.

Bit-field Name Comment

7:0 Checksum Checksum

9:8 S Scan information

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11:10 B Bar info data valid

12 A0 Active information present

14:13 Y RGB or YCbCr indicator

15 Reserved Returns 0

19:16 R Active format aspect ratio

21:20 M Picture aspect ratio

23:22 C Colorimetry (for example: ITU BT.601, BT.709)

25:24 SC Non-uniform picture scaling

27:26 Q Quantization range

30:28 EC Extended colorimetry

31 ITC IT content

38:32 VIC Video format identification code


43:40 PR Picture repetition factor

45:44 CN Content type

47:46 YQ YCC quantization range

63:48 ETB Line number of end of top bar

79:64 SBB Line number of start of bottom bar

95:80 ELB Pixel number of end of left bar

111:96 SRB Pixel number of start of right bar

112 Disables the core of the InfoFrame packetsfrom inserting.

• 1: The core does not insert info_avi[111:0].

• 0: The core inserts info_avi[111:0]when checksum field (info_avi[7:0]) isnon-zero. The core sends default valueswhen checksum field (info_avi[7:0]) iszero.

Source HDMI Vendor Specific InfoFrame (VSI)The core transmits a HDMI Vendor Specific InfoFrame once per field.

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Table 4-3: HDMI Vendor Specific InfoFrame Bit-Fields

The table below lists the bit-fields for VSI.



4:0 Length Length = Nv


36:13 IEEE 24-bit IEEE registration identified(0×000C03)

41:37 Reserved All 0

44:42 HDMI_Video_Format HDMI video format

52:45 HDMI_VIC HDMI proprietary video formatidentification code


60:58 3D_Ext_Data 3D extended data

61 Disables the core of the InfoFramepackets from inserting.

• 1: The core does not insert info_vsi[60:0].

• 0: The core inserts info_vsi[60:0] when checksum field(info_vsi[12:5]) is non-zero.The core sends default valueswhen checksum field (info_vsi[12:5]) is zero.

Note: If the checksum input to the port is zero, the core uses a default value of zero for each bit-field.

Source Audio InfoFrame (AI)The core transmits an Audio InfoFrame once per field.

Table 4-4: Source Audio InfoFrame Bundle Bit-Fields

The table below lists the signal bit-fields.




10:8 CC Channel count


UG-HDMI2014.12.15 Source Audio InfoFrame (AI) 4-9


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15:12 CT Audio format type

17:16 SS Bits per audio sample

20:18 SF Sampling frequency

23:21 Reserved Returns 0

31:24 CXT Audio format type of the audiostream

39:32 CA Speaker location allocation FL, FR

41:40 LFEPBL LFE playback level information, dB


46:43 LSV Level shift information, dB

47 DM_INH Down-mix inhibit flag

48 Disables the core of the InfoFramepackets from inserting.

• 1: The core does not insert audio_info_ai[47:0].

• 0: The core inserts audio_info_ai[47:0] when checksum field(audio_info_ai[7:0]) is non-zero. The core sends default valueswhen checksum field (audio_info_ai[7:0]) is zero.

Note: If the checksum input to the port is zero, the core uses a default value of zero for each bit-field.

Source Audio EncoderAudio transport requires three packet types: Audio Timestamp InfoFrame, Audio InformationInfoFrame, and Audio Sample Data.

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Figure 4-11: Source Audio Encoder

TimestampScheduler




CTS, N

Override AI

Audio Input AudioPacketizer

DCFIFO

Default AIV-SYNC

1

Multiplexer

AudioAuxiliaryStream

Audio Data Port

The Audio Timestamp InfoFrame packet contains the CTS and N values. You need to provide thesevalues. The core schedules this packet to be sent every ms. The scheduler uses the ls_clk and CTS valueto determine a 1-ms interval.

The core sends the Audio Information InfoFrame packet on the active edge of the V-SYNC signal.

The Audio Sample Data packet queues on a DCFIFO. The core also uses the DCFIFO to synchronize itsclock to ls_clk. The Audio Packetizer packs the audio sample data into the Audio Sample packets. AnAudio Sample packet can contain up to 4 audio samples, based on the required audio sample clock. Thecore sends the Audio Sample packets whenever there is an available slot in the auxiliary packet stream.

Source ParametersYou set parameters for the source using the Altera HDMI parameter editor.

Table 4-5: HDMI Source Parameters

Parameter Value Description

Device family Targeted device family; matches the projectdevice family.

Direction Tx = Source

Rx = Sink

Select HDMI source.

Symbols per clock 1 or 2 symbols perclock

Determines how many TMDS symbols and pixelsare processed per clock.

Support auxiliary 0 = No AUX

1 = AUX

Determines if auxiliary channel encoding isincluded.

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Support deep color 0 = No deep color

1 = Deep color

Determines if the core can encode deep colorformats.

To enable this parameter, you must also enablethe Support auxiliary parameter.

Note: This parameter is not supported for14.1 release. The parameter will alwaysset to 0.

Support audio 0 = No audio

1 = Audio

Determines if the core can encode audio data.


Support 8 channels audio 0 = No

1 = Yes

Determines if the core can support up to 8 audiochannels. Enable this parameter if you want tosupport more than the default 2 audio channels.

To enable this parameter, you must also enablethe Support audio parameter.


Source InterfacesThe table lists the source's port interfaces.

Table 4-6: Source Interfaces

N is the number of symbols per clock.

Interface Port Type ClockDomain

Port Direction Description

Reset Reset N/A reset Input Main asynchro‐nous reset input.

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Clock

Clock N/A ls_clk Input Link speed clockinput.

Typically, 8/8, 10/8,12/8, 16/8 times thevid_clk accordingto color depth.

Typically, thissignal connects tothe transceiveroutput clock.

Clock N/A vid_clk Input Video data clockinput.

In 1 symbol perclock mode, thisclock is the videopixel clock. In 2symbols per clockmode, this clock ishalf the pixel clock.

Clock N/A audio_clk Input Audio clock input.

Video Data Port

Conduit vid_clk vid_data[N*48-1:0] Input Video 48-bit pixeldata input port.

In 2 symbols perclock (N=2) mode,this port acceptstwo 48-bit pixelsper clock.

Conduit vid_clk vid_de[N-1:0] Input Video data enableinput that indicatesactive pictureregion.

Conduit vid_clk vid_hsync[N-1:0] Input Video horizontalsync input.

Conduit vid_clk vid_vsync[N-1:0] Input Video vertical syncinput.

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TMDS Data Port

Conduit ls_clk out_b[19:0] Output TMDS encodedblue channeloutput.

When in 1 symbolper clock (N=1)mode, this port isbit duplicated.

Conduit ls_clk out_r[19:0] Output TMDS encoded redchannel output.


Conduit ls_clk out_g[19:0] Output TMDS encodedgreen channeloutput.


Conduit ls_clk out_c[19:0] Output TMDS encodedclock channeloutput.


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Auxiliary Data Port

Conduit ls_clk aux_ready Output Auxiliary datachannel validoutput.

Conduit ls_clk aux_valid Input Auxiliary datachannel validinput.

Conduit ls_clk aux_data[71:0] Input Auxiliary datachannel data input.

Conduit ls_clk aux_sop Input Auxiliary datachannel start-of-packet input.

Conduit ls_clk aux_eop Input Auxiliary datachannel end-of-packet input.

Encoder Control Port Conduit ls_clk mode Input Encoding modeinput.

• 0 = DVI• 1 = HDMI

Audio Port

Conduit audio_clk audio_CTS[21:0] Input Audio CTS valueinput.

Conduit audio_clk audio_N[21:0] Input Audio N valueinput.

Conduit audio_clk audio_

data[32*(2+6*M)-

1:0]

Input Audio data input.

M is 1 when youenable support for8-channel audio.Otherwise it is 0.

Conduit audio_clk audio_de[2+6*M-

1:0]

Input Audio data validinput.


Conduit audio_clk audio_mute Input Audio mute input.

Conduit audio_clk audio_info_

ai[48:0]

Input Audio InfoFrameinput bundle input.

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Auxiliary Control Port

Conduit ls_clk gcp[5:0] Input General ControlPacket.

Conduit ls_clk gcp_Set_AVMute Input General ControlPacket mute input.

Conduit ls_clk gcp_Clear_AVMute Input General ControlPacket clear input.

Conduit ls_clk info_avi[112:0] Input Auxiliary VideoInformationInfoFrame input.

Conduit ls_clk info_vsi[61:0] Input Vendor SpecificInformationInfoFrame input.

Source Clock TreeThe source uses various clocks.

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Figure 4-12: Source Clock Tree

The figure shows how the different clocks connect in the source core.

ResamplerFIFO

Sync

TMDS(TERC4)Encoder

Sync

Sync

Sync

HSSI[0]

HSSI[1]

HSSI[2]

HSSI[3]

CMU PLL

clk

AUX Data

TransceiverBlockls_clk

Channel[0]

Channel[1]

Channel[2]

TMDS Clock

Pixel Data

WRCLK RDCLK

WRCLK RDCLK

WRCLK RDCLK

WRCLK RDCLK

HDMI Source Core

SwitchGPLL X1.0

X1.25X1.5X2.0

clk

bpp

WRCLK RDCLK

The pixel data clocks into the core at the pixel clock (clk). This same clock derives the required link speedclock (ls_clk), which is used to drive the transceiver clock multiplier unit (CMU) phase-locked loop (PLL)input. The ls_clk depends on the color bits per pixel (bpp).

For HDMI source, you need to instantiate 4 transmitter channels: 3 channels to transmit data and 1channel to transmit clock information.

You must connect the core ls_clk to the transceiver clock output, which performs the TMDS and TERC4encoding. The auxiliary data clocks into the core at the ls_clk rate.

Related Information

• Altera High-Definition Multimedia Hardware Demonstration on page 6-1For more information about the transmitter channels.

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Altera High-Definition Multimedia InterfaceSink 5

2014.12.15


Sink Functional DescriptionThe HDMI sink core provides direct connection to the Transceiver Native PHY through a 10-bit or 20-bitparallel data path.

Figure 5-1: HDMI Sink Signal Flow Diagram

The figure below shows the flow of the HDMI sink signals. The figure shows the various clocking domainsused within the core.

VideoResample

AuxiliaryDecoder

AudioDecoder

TMDS TERC4Decoder

AuxiliaryMemory Encoder

Capture AI

Capture AVI

Capture GCP

Color Depth, pp

GCP

AudioData Port

AuxiliaryMemory Interface

AI Infoframe

AVI Infoframe

AUX Data Port

AuxiliaryPacket Capture

ControlPacket Ports

VideoData Port

vid_clk

Video Data

mode

VideoData

AUXData

DeskewWordAlign

Bitslip

reset

Word Alignment and Channel Deskew

TMDSData

ls_clk[2:0]vid_clk[0]ls_clk[0]

Clock Domains

The sink core provides three 10-bit or 20-bit data input paths corresponding to the color channels. Thesink core clocks the three 10-bit or 20-bit channels from the transceiver outputs using the respectivetransceiver clock outputs.

• Blue channel: 0• Red channel: 1• Green channel: 2





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Sink Channel Word Alignment and DeskewThe input stage of the sink is responsible for synchronizing the incoming parallel data channels correctly.The synchronization is split to two stages: word alignment and channel deskew.

Word alignment • Correctly aligns the incoming parallel data to word boundaries usingbit-slip technique.

• TMDS encoding does not guarantee unique control codes, but the corecan still use the sequence of continuous symbols found in data andvideo preambles to align.

• The alignment algorithm searches for 12 consecutive 0×54 or 0×abcorresponding to the data and video preambles.

Note: The preambles are also present in digital video interface(DVI) coding.

• The alignment logic asserts a marker indicator when the 12 consecu‐tive signals are detected.

• Similarly, the logic infers alignment loss when 8K symbol clocks elapsewithout a single marker assertion.

Channel deskew • When the data channels are aligned, the core then attempts to deskeweach channel.

• The sink core deskews at the rising edge of the marker insertion.• For every correct deskewed lane, the marker insertion will appear in all

three TMDS encoded streams.• The sink core deskews using three dual-clock FIFOs.• The dual-clock FIFOs also synchronize all three data streams to the

blue channel clock to be used later throughout the decoder core.

5-2 Sink Channel Word Alignment and DeskewUG-HDMI

2014.12.15

Altera Corporation Altera High-Definition Multimedia Interface Sink

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Figure 5-2: Channel Deskew DCFIFO Arrangement

The figure below shows the signal flow diagram of the deskew logic.

AlignmentDetection

DCFIFOChannel 0

rdreqwrclk rdclk

DCFIFOChannel 1

rdreqwrclk rdclk

DCFIFOChannel 2

rdreqwrclk rdclk

ls_clk[0]

ls_clk[0]

ls_clk[0]ls_clk[2]

ls_clk[1]

ls_clk[0]

marker_in[0]

data_in[0] data[0]

marker_in[1]

data_in[1] data[1]

marker_in[2]

data_in[2] data[2]

marker[2]marker[1]marker[0]

The FIFO read signal of the channels is normally asserted. The sink core deasserts a particular FIFO readsignal if a marker appears at its output and not in the other two FIFO outputs. By deasserting, the sinkcore stalls the data stream for sufficient cycles to remove the channel skew. If any of the FIFO channelsoverflow, the sink core asserts a reset signal which propagates backwards to the word alignment logic.

Sink TMDS/TERC4 DecoderThe sink TMDS/TERC4 decoder follows the HDMI/DVI specification. The video data is encoded usingthe TMDS algorithm and auxiliary data is encoded using TERC4 algorithm.

The sink core feeds the aligned channels into the TMDS/TERC4 decoder. You can parameterize thedecoder to operate in 1- or 2-TMDS symbols per clock. If you choose 2-TMDS symbols per clock, thedecoder will produce 2-decoded symbols per clock. The 2-decoded symbols per clock output supportshigh pixel clock resolutions on low-end FPGA devices.

UG-HDMI2014.12.15 Sink TMDS/TERC4 Decoder 5-3

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Figure 5-3: Sink TMDS Decoder

The figure below shows the input and output for the TMDS decoder.

aux_de

vid_de

Auxiliary

Pixel

CTL0

CTL1

mode

TMDS/TERC4DecoderChannel Data

Table 5-1: TMDS Decoder Output

The table below describes the TMDS decoder output data and signals.Output Description

Auxiliary data • 4-bit for 10-bit channel data• 8-bit for 20-bit channel data

Pixel data • 8-bit for 10-bit channel data• 16-bit for 20-bit channel data

Control signal (CTL0) Decodes vertical sync signal

• 1-bit for 10-bit channel data• 2-bit for 20-bit channel data

Control signal (CTL1) Decodes horizontal sync signal

• 1-bit for 10-bit channel data• 2-bit for 20-bit channel data

Data enable signal (aux_de) Generated by the sink core to identify if the auxiliary data isvalid.

Data enable signal (vid_de) Generated by the sink core to identify if the pixel data isvalid.

Mode signal • Determines if the input channel stream is HDMIencoding or DVI encoding

• The logic detects the data or video preamble symbol. andwhen present assumes HDMI encoding signaling

Sink Video ResamplerThe video resampler consists of a gearbox and a dual-clock FIFO (DCFIFO).

The gearbox converts 8 bit-per-second (bps) data to 8-, 10-, 12- or 16-bps data based on the current colordepth. The GCP conveys the color depth information.

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Figure 5-4: Sink Resampler Signal Flow Diagram

H-SYNCV-SYNCde

Pixel Data [bpp:0]

1

vid_clk

DCFIFO

ls_clk

q

rd

rdwrclk

data

wr

wrclk

PhaseCounter

Gearbox

H-SYNCV-SYNC

dePixel Data [7:0]

Resampled

pp

bpp

The resampler adheres to the recommended phase count method described in HDMI Specification Ver.1.4b.

• To keep the source and sink resamples synchronized, the source must send the phase-packing (pp)value to the sink during the vertical blanking phase, using the general control packet.

• The pp corresponds to the phase of the last pixel in the last active video line.• The phase-counter logic compares its own pp value to the pp value received in the general control

packet and slips the phase count if the two pp values do not agree.

The output from the resampler is a fixed 16 bits per color. When the resampler operates in lower colordepths, the low order bits are zero.

Sink Auxiliary Decoder

The sink core decodes the auxiliary data path into a 72-bit wide standard packet stream. The streamcontains a valid, start-of-packet (SOP) and end-of-packet (EOP) marker.

Figure 5-5: Sink Auxiliary Packet Decoder

clk

reset

valid

aux_de

sop

eop

data[71:0]

AuxiliaryPacket

DecoderChannel1[3:0]Channel2[3:0]

Channel0[3:0]

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Figure 5-6: Auxiliary Data Stream Signal

The figure below shows the relationship between the data bit-field and its clock cycle based on single- ordouble-symbol per clock mode.

PB22

PB21

PB15

PB14

PB8

PB7

PB1

PB0

HB0

Phase 0

PB24

PB23

PB17

PB16

PB10

PB9

PB3

PB2

HB1

Phase 1

PB26

PB25

PB19

PB18

PB12

PB11

PB5

PB4

HB2

Phase 2

BCH3

PB27

BCH2

PB20

BCH1

PB13

BCH0

PB6

0

Phase 3

BCH Block 3

BCH Block 2

BCH Block 1

BCH Block 0

Output Data

Byte[8]

Byte[0]

0 - - 8 - - 16 - - 24

0 - - 4 - - 8 - - 12

Startofpacket

Endofpacket

Valid

Clock

Cycle 1 Symbol

Cycle 2 Symbol

Phase 0 Phase 1 Phase 2 Phase 3

The data output at EOP contains the received BCH error correcting code. The sink core does not performany error correction within the core. The auxiliary data is available outside the core.

Note: You can find the bit-field nomenclature in the HDMI Specification Ver.1.4b.

Sink Auxiliary Packet CaptureThe auxiliary streams transfer auxiliary packets.

The auxiliary packets can carry 15 different packet types.

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Figure 5-7: Auxiliary Packet Capture

The figure below shows the capture of the auxiliary packet.

clk

reset

valid

ready

HB[3:0]

PB[27:0]

AuxiliaryPacket

Generator

valid0

valid1

sop

eop

data[71:0]

valid2

valid3

BCH[3:0]

Note: You can find the output bit-fields associated with HB[3:0], PB[27:0], and BCH[3:0] in the HDMISpecification Ver.1.4b

The module produces 4 valid signals to simplify the user logic.

Table 5-2: Output Data and Valid Signal Relationship

The table below shows the relationship between the valid signals and the output data bits.Output Data Bits Valid Signals

{pb22, pb21, pb15, pb14, pb8, pb7, pb1, pb0, hb0} when valid0



{bch3, pb27, bch2, pb20, bch1, pb13, bch0, pb6, hb3} when valid3

To simplify user applications and minimize external logic, the HDMI core captures 3 different packettypes and decodes the audio sample data. These packets are: General Control Packet, Auxiliary VideoInformation (AVI) InfoFrame, and HDMI Vendor Specific InfoFrame (VSI).

Sink General Control Packet

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Table 5-3: General Control Packet Input Fields

Bit Field Name Comment

gcp[3:0] Color Depth(CD)

CD3 CD2 CD1 CD0 Color depth

0 0 0 0 Color depth notindicated

0 0 0 1 Reserved

0 0 1 0 Reserved

0 0 1 1 Reserved

0 1 0 0 24 bpp

0 1 0 1 30 bpp

0 1 1 0 36 bpp

0 1 1 1 48 bpp

1 1 1 1 Reserved

gcp[4] Set_AVMUTE

Refer to HDMI Specification Ver.1.4b

gcp[5] Clear_AVMUTE

Refer to HDMI Specification Ver.1.4b

Sink Auxiliary Video Information (AVI) InfoFrame Bit-FieldsThe HDMI core produces AVI InfoFrame to simplify user applications.

Table 5-4: Auxiliary Video Information (AVI) InfoFrame

The table below lists the bit-fields for the AVI InfoFrame port bundle.




9:8 S Scan information

11:10 B Bar info data valid

12 A0 Active information present

14:13 Y RGB or YCbCr indicator


19:16 R Active format aspect ratio

21:20 M Picture aspect ratio

23:22 C Colorimetry (for example: ITU BT.601, BT.709)

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25:24 SC Non-uniform picture scaling

27:26 Q Quantization range

30:28 EC Extended colorimetry

31 ITC IT content

38:32 VIC Video format identification code


43:40 PR Picture repetition factor

45:44 CN Content type

47:46 YQ YCC quantization range

63;48 ETB Line number of end of top bar

79:64 SBB Line number of start of bottom bar

95:80 ELB Pixel number of end of left bar

111:96 SRB Pixel number of start of right bar

Sink HDMI Vendor Specific InfoFrame (VSI)The core produces the captured HDMI Vendor Specific InfoFrame to simplify user applications.

Table 5-5: HDMI Vendor Specific InfoFrame Bit-Fields

The table below lists the bit-fields for VSI.



4:0 Length Length = Nv


36:13 IEEE 24-bit IEEE registration identified(0×000C03)


44:42 HDMI_Video_Format HDMI video format

52:45 HDMI_VIC HDMI proprietary video formatidentification code


60:58 3D_Ext_Data 3D extended data

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Sink Auxiliary Data PortThe auxiliary port is attached to external memory. This port allows you to write packets to memory foruse outside the HDMI core.

The core calculates the address for the data port using the header byte of the received packet. The corewrites packet types 0–15 into a contiguous memory region.

Figure 5-8: Typical Application of AUX Packet Register Interface

The figure below shows a typical application of the auxiliary data port.

data[71:0]HDMI Sink Core

wraddr[5:0] On-Chip

Memory

data[71:8]

rdaddr[5:0]

From 64 bitNios IIAvalon-MM

Table 5-6: Auxiliary Packet Memory Map

The table below lists the address map corresponding to the captured packets.

AddressByte Offset

8 7 6 5 4 3 2 1 0

NULL PACKET

0 PB22 PB21 PB15 PB14 PB8 PB7 PB1 PB0 HB0



3 BCH3 PB27 BCH2 PB20 BCH1 PB13 BCH0 PB6 HBCH0

Audio Clock Regeneration (N/CTS)





Audio Sample





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General Control





ACP Packet





ISRC1 Packet





ISRC2 Packet





One Bit Audio Sample Packet 5.3.9





DST Audio Packet





High Bitrate (HBR) Audio Stream Packet


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High Bitrate (HBR) Audio Stream Packet




Gamut Metadata Packet





Unused





Vendor-Specific InfoFrame





AVI InfoFrame





Source Product Descriptor InfoFrame





Audio InfoFrame



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Audio InfoFrame



MPEG Source InfoFrame





Sink Audio DecodingThe sink core sends the audio data using auxiliary packets. You can use three packet types in transportingaudio: Audio InfoFrame, Audio Timestamp, and Audio Sample Data.

The Audio InfoFrame packet is not used within the core but it is captured and presented outside the core.

The Audio Timestamp packet transmits the CTS and N values required to synthesize the audio sampleclock. The core also makes the CTS and N values available outside the core. The audio clock synthesizeruses a phase-counter to recover the audio sample rate.

Figure 5-9: Audio Decoder Signal Flow

Capture AudioInfoFrame

Capture AudioTimestamp

AudioDepacketizer

Valid

AudioSample

FIFO

Audio ClockSynthesizer

wr

AuxiliaryStreamPackets

Audio Data

data

rd

q

CTS, N

AI InfoFrame

Audio Valid

Audio LPCM

The output from the audio clock synthesizer generates a valid pulse at the same rate as the audio sampleclock used in the HDMI source device. This valid pulse is available outside the core as an audio samplevalid signal. This signal reads from a FIFO, which governs the rate of audio samples. The audio depacke‐tizer drives the input to the FIFO.

The audio depacketizer extracts the 32-bit audio sample data from the incoming Audio Sample packets.The Audio Sample packets can hold from one to four sample data values.

Sink ParametersYou set parameters for the sink using the Altera HDMI parameter editor.

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Table 5-7: HDMI Sink Parameters


Device family Arria V,

Stratix V

Targeted device family; matches the projectdevice family.

Direction Tx = Source

Rx = Sink

Select HDMI sink.

Symbols per clock 1 or 2 symbols perclock

Determines how many TMDS symbols and pixelsare processed per clock.

Support auxiliary 0 = No AUX

1 = AUX

Determines if auxiliary channel encoding isincluded.

Support deep color 0 = No deep color

1 = Deep color

Determines if the core can encode deep colorformats.



Support audio 0 = No audio

1 = Audio

Determines if the core can encode audio data.


Support 8 channels audio 0 = No

1 = Yes

Determines if the core can support up to 8 audiochannels. Enable this parameter if you want tosupport more than the default 2 audio channels.

To enable this parameter, you must also enablethe Support audio parameter.


Sink InterfacesThe table lists the sink's port interfaces.

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Table 5-8: Sink Interfaces

N is the number of symbols per clock.



Reset Reset N/A reset Input Main asynchro‐nous reset input.

Clock

Clock N/A ls_clk[2:0] Input Link speed clockinput.

These clockscorrespond to thein_r, in_g, andin_b TMDSencoded datainputs.

Clock N/A vid_clk Input Video data clockinput.

Typically, 8/8, 8/10,8/12, 8/16 times thels_clk accordingto color depth (seeGeneral ControlPacket output).

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Video Data Port

Conduit vid_clk vid_data[N*48-1:0] Output Video 48-bit pixeldata output port.

In 2 symbols perclock (N=2) mode,this port producestwo 48-bit pixelsper clock.

Conduit vid_clk vid_de[N-1:0] Output Video data enableoutput thatindicates activepicture region.

Conduit vid_clk vid_hsync[N-1:0] Output Video horizontalsync output.

Conduit vid_clk vid_vsync[N-1:0] Output Video vertical syncoutput.

Conduit vid_clk locked[2:0] Output Indicates that theHDMI sink core islocked to theTMDS signals.

Each bit representsa color channel.

TMDS Data Port

Conduit ls_clk[0] in_b[N*10-1:0] Input TMDS encodedblue channel input.

Conduit ls_clk[1] in_r[N*10-1:0] Input TMDS encoded redchannel input.

Conduit ls_clk[2] in_g[N*10-1:0] Input TMDS encodedgreen channelinput.

Conduit ls_clk[2:0] in_lock[2:0] Input Ready signal fromthe transceiverreset controller thatindicates thetransceivers arelocked.

Each bit representsa color channel.

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Auxiliary Data Port

Conduit ls_clk[0] aux_valid Output Auxiliary datachannel validoutput.

Conduit ls_clk[0] aux_data[71:0] Output Auxiliary datachannel dataoutput.

Conduit ls_clk[0] aux_sop Output Auxiliary datachannel start-of-packet input.

Conduit ls_clk[0] aux_eop Output Auxiliary datachannel end-of-packet output.

Audio Port

Conduit ls_clk[0] audio_CTS[21:0] Output Audio CTS valueoutput.

Conduit ls_clk[0] audio_N[21:0] Output Audio N valueoutput.

Conduit ls_clk[0] audio_

data[32*(2+6*M)-

1:0]

Output Audio data output.


Conduit ls_clk[0] audio_valid[2+6*M-

1:0]

Output Audio data validoutput.


Conduit ls_clk[0] audio_info_

ai[47:0]

Input Audio infoFrameinput bundle.

Auxiliary MemoryInterface

Conduit ls_clk[0] aux_pkt_addr[5:0] Output Auxiliary packetmemory bufferaddress output.

Conduit ls_clk[0] aux_pkt_data[71:0] Output Auxiliary packetmemory bufferdata output.

Conduit ls_clk[0] aux_pkt_wr Output Auxiliary packetmemory bufferwrite strobe output.

UG-HDMI2014.12.15 Sink Interfaces 5-17


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Auxiliary Control Port

Conduit ls_clk[0] gcp[5:0] Output General ControlPacket output.

Conduit ls_clk[0] gcp_Set_AVMute Output General ControlPacket muteoutput.

Conduit ls_clk[0] gcp_Clear_AVMute Output General ControlPacket clear output.

Conduit ls_clk[0] info_avi[111:0] Output Auxiliary VideoInformationInfoFrame output.

Conduit ls_clk[0] info_vsi[60:0] Output Vendor SpecificInformationInfoFrame output.

Sink Clock TreeThe sink core uses different clocks.

The logic clocks the transceiver 20-bit data into the core using the three CDR clocks: (ls_clk[2:0]).

The TMDS and TERC4 decoding is done at the link-speed clock. The sink then resamples the pixel dataand presents the data at the output of the core at the video pixel clock (clk).

The pixel data clock depends on the video format used (within HDMI specification).

• 8-bpp—1 times link speed clock• 10-bpp—1.25 times link speed clock• 12-bpp—1.5 times link speed clock• 16-bpp—2 times link speed clock

For HDMI sink, you need to instantiate 3 receiver channels to receive data.

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Figure 5-10: Sink Clock Tree

The figure shows how the different clocks can be selected for the sink core.

ResamplerFIFO

Sync

TMDS(TERC4)Decoder

Sync

Sync

HSSI[0]

HSSI[1]

HSSI[2]

CDR PLL

AUX Data

TransceiverBlock ls_clk[0]

Channel[0]

Channel[1]

Channel[2]

Video Data

RDCLKWRCLK

RDCLKWRCLK

RDCLKWRCLK

HDMI Sink Core

WRCLK

RDCLK

SwitchGPLL X1.0

X1.25X1.5X2.0

TMDS Clock

bpp

clk

ls_clk[1]

ls_clk[2]

Related Information

• Altera High-Definition Multimedia Hardware Demonstration on page 6-1For more information about the receiver channels.

UG-HDMI2014.12.15 Sink Clock Tree 5-19


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Altera High-Definition Multimedia InterfaceHardware Demonstration 6

2014.12.15


The Altera High-Definition Multimedia Interface (HDMI) hardware demonstration allows you toevaluate the functionality of the HDMI IP core and provides a starting point for you to create your owndesign.

The demonstration runs on Arria V GX FPGA development board and requires the Bitec HDMI HSMCdaughter card. The design performs a direct pass-through for a standard HDMI video stream.

Note: If you want to use another board or daughter card, check the schematics and change the pinassignments accordingly.

Figure 6-1: HDMI Hardware Demonstration Block Diagram

The figure below shows a high level block diagram of the demonstration.

Reconfiguration ManagementState Machine

ALTPLLReconfiguration (RX)

GPLL (RX)

GXB (RX) HDMI (RX) Top

Altera TransceiverReconfiguration

Nios II

Frame BufferCVI CVO

WatchdogTimer

ALTPLLReconfiguration (TX)

GPLL (TX)

GXB (TX)HDMI (TX) Top

ALTPLL(SYS_PLL)

VIP Passthrough Qsys System

HDMI RXGroup Logic

HDMI TX Group Logic

DataControlClock





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HDMI Hardware Demonstration RequirementsThe HDMI demonstration requires an Altera FPGA board and supporting hardware.

• Arria V GX FPGA Starter Kit• Bitec HDMI 1.4 HSMC daughter card version 2• PC with a HDMI output• Monitor with a HDMI input• 2 HDMI cables

• A cable to connect the graphics card to the Bitec daughter card RX connector.• A cable to connect the Bitec daughter card TX connector to the monitor.

Note: Altera recommends that you test the PC and monitor first by connecting the PC directly to themonitor. This ensures all the drivers are installed correctly.

Figure 6-2: Arria V GX HDMI Evaluation Platform

The Bitec HDMI HSMC daughter card is designed to allow the Arria GX FPGA device to interface withthe HDMI source and sink devices.

The following figures illustrate schematic diagram of the daughter card.

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Altera Corporation Altera High-Definition Multimedia Interface Hardware Demonstration

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Figure 6-3: HDMI HSMC Interface Signal Connections

UG-HDMI2014.12.15 HDMI Hardware Demonstration Requirements 6-3

Altera High-Definition Multimedia Interface Hardware Demonstration Altera Corporation

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Figure 6-4: Adaptive Cable Equalizer and Level Shifter

Related InformationArria V GX Starter Kit User Guide

Demonstration WalkthroughSetting up and running the HDMI hardware demonstration consists of four stages.

You can use the Altera-provided scripts to automate these stages.

1. Set up the hardware.2. Copy the design files to your working directory.3. Build and download the design.4. Power up the HDMI monitor and view the results.

Set Up the HardwareThe first stage of the demonstration is to set up the hardware.

To set up the hardware for the demonstration:

1. Connect the Bitec daughter card to the Arria V GX starter board.2. Connect the Arria V GX starter board to your PC using a USB cable.

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http://www.altera.com/literature/ug/ug_avgx_starter_dev_kit.pdf


Note: The Arria V GX FPGA starter board has an On-Board USB-Blaster™ II connection. If yourversion of the board does not have this connection, you can use an external USB-Blaster cable.

3. Connect an HDMI cable from the HDMI RX on the Bitec HSMC daughter card, and leave the otherend unconnected.

4. Connect another HDMI cable from the HDMI TX on the Bitec HSMC daughter card to a HDMImonitor.

Copy the Design FilesAfter you set up the hardware, you copy the design files.Copy the hardware demonstration files from <IP root directory>/altera/altera_hdmi/hw_demo/av_sk to yourworking directory.

Your working directory should contain the following files:

UG-HDMI2014.12.15 Copy the Design Files 6-5


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• Verilog HDL design files

• audio/pll_9k6.v

• hdmi_pll_with_reconfig/pll_hdmi.v

• hdmi_pll_with_reconfig/pll_reconfig.v

• hdmi_pll_with_reconfig/pll_sys_50.v

• i2c_edid/pll_i2c.v

• i2c_edid/hdmi_rx_edid_ram.v

• i2c_edid/output_buf_i2c.v

• native_phy_rx/gxb_rx.v

• native_phy_rx/gxb_rx_reset.v

• native_phy_tx/gxb_tx.v

• native_phy_tx/gxb_tx_reset.v

• reconfig_ip/gxb_reconfig.v

• IP catalog variant files

• audio/pll_9k6.v

• hdmi_pll_with_reconfig/pll_hdmi.v

• hdmi_pll_with_reconfig/pll_reconfig.v

• hdmi_pll_with_reconfig/pll_sys_50.v

• i2c_edid/pll_i2c.v

• i2c_edid/hdmi_rx_edid_ram.v

• i2c_edid/output_buf_i2c.v

• native_phy_rx/gxb_rx.v

• native_phy_rx/gxb_rx_reset.v

• native_phy_tx/gxb_tx.v

• native_phy_tx/gxb_tx_reset.v

• reconfig_ip/gxb_reconfig.v

• Qsys files

• qsys_vip_passthrough.qsys

• hdmi_tx/hdmi_tx.qsys

• hdmi_rx/hdmi_rx.qsys

• Scripts

• runall.tcl—script to run build_ip, build_sw scripts, and compile project• build_ip.tcl—script to run project setup, generate IP or Qsys• build_sw.sh—script to set up software workspace• assignments.tcl—script that contains device, I/O, and other assignments

• Miscellaneous files

• hdmi_demo.sdc—top-level SDC file• mr.sdc

• i2c_edid/edid_4k.hex—initial content for the EDID ROM

• Software files

• software/hdmi_demo_src/—files in the software directory that contain example application sourcecode

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Build the DesignAfter you copy the design files, you can build the design.

You can use a Tcl script to build and compile the FPGA design.

1. Open a Nios II Command Shell.2. Change the directory to your working directory.3. Type the command and enter.

source runall.tcl

This script executes the following commands:

• Generate IP catalog files• Generate the Qsys system• Create a Quartus II project• Create a software work space and build it• Compile the Quartus II project• Run Analysis & Synthesis to generate a post-map netlist for DDR assignments• Perform a full compile

Note: If you are a Linux user, you will get a message cygpath: command not found. You can safelyignore this message; the script will proceed to generate the next commands.

View the ResultsAt the end of the demonstration, you will be able to view the results on the HDMI monitor.

To view the results of the demonstration, follow these steps:

1. Power up the development board.2. Type the following command to download the Software Object File (.sof) to the FPGA.

nios2-configure-sof hdmi_demo_example_av.sof

3. Connect the unconnected end of the HDMI cable to a video source.4. Power up the HDMI monitor (if you haven't done so).

The design displays the output of your video source (PC).5. Open the graphic card control utility (if you are using a PC as source).

You will see the words BITEC_HDMI_4K on the screen. Using the control panel, you can switch betweenthe various video resolutions. This demonstration allows 640×480p60, 720×480p60, 1280×720p60,1920×1080p60, and 3840×2160p24.

Guidelines

• If you do not see visible output on the monitor, try unplugging the cable from your source and plug itback again (hot-plug detection). Make sure that USER_LED0, USER_LED1 and USER_LED2 on the boardare illuminated; indicating HDMI RX core has locked correctly.

• Pressing CPU_RST triggers reset to the whole design while USER_LED3 and USER_LED7 are indicatingoversampling mode is enabled in RX and TX HDMI core respectively.

• USER_LED4, USER_LED5, and USER_LED6 are indicating the status of DDR3 in the design.

• USER_LED4 indicates DDR3 initialization has completed• USER_LED5 indicates DDR3 calibration is successful• USER_LED6 indicates DDR3 calibration has failed

UG-HDMI2014.12.15 Build the Design 6-7


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If you see USER_LED6 illuminating, in the Nios II command shell, type cpu_reset to reset the system.

6-8 GuidelinesUG-HDMI

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Altera High-Definition Multimedia InterfaceSimulation Example 7

2014.12.15


The Altera HDMI simulation example evaluates the functionality of the HDMI IP core and provides astarting point for you to create your own simulation.

This simulation example targets the Modelsim SE simulator. The simulation covers the following corefeatures:

• IEC-60958 audio format• Standard H/V/DE/RGB input video format• Support for 1 or 2 symbols per clock

Figure 7-1: HDMI Testbench

HDMI TX(1 Symbol/Clock)

HDMI RX(1 Symbol/Clock)

HDMI TX(2 Symbols/Clock)

HDMI RX(2 Symbols/Clock)

AUX Packet Generator(1 Symbol)

Audio PacketGenerator

AUX Packet Generator(2 Symbols)

CRCCheck

Video TPG

CRCCheck

CRCCheck

Expand1 Pixel2 Pixel

CRCCheck





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The Test Pattern Generator (TPG) provides the video stimulus. Because the core allows simulation for 1symbol and 2 symbols, the testbench uses a pixel expander to convert the 1-pixel per clock to 2-pixel perclock equivalent. Both the HDMI TX cores are stimulated using an audio packet generator and aux packetgenerator. The output of the HDMI TX cores drives both 1-symbol and 2-symbol per clock HDMI RXcores.

The testbench implements CRC checking on the input and output video. The testbench checks the CRCvalue of the transmitted data against the CRC calculated in the received video data. The testbenchperforms the checking after detecting 4 stable V-SYNC signals from the receiver.

Simulation WalkthroughSetting up and running the HDMI simulation example consists of three steps.

1. Copy the simulation files from <IP root directory>/altera/altera_hdmi/sim_example to your workingdirectory.

2. Generate the IP simulation files and scripts, compile, and simulate.a. Open your command prompt.b. Type the command below and enter.

sh runall.sh

This script executes the following commands:

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Altera Corporation Altera High-Definition Multimedia Interface Simulation Example

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Command

Generate the simulation files for the HDMI cores. • ip-generate --project-directory=./ --

component-file=./hdmi_rx_single.qsys --

output-directory=./hdmi_rx_single/sim/

--file-set=SIM_VERILOG --report-

file=sopcinfo:./hdmi_rx_single.sopcinfo

--report-file=html:./hdmi_rx_

single.html --report-file=spd:./hdmi_

rx_single/sim/hdmi_rx_single.spd --

report-file=qip:./hdmi_rx_single/sim/

hdmi_rx_single.qip

• ip-generate --project-directory=./ --

component-file=./hdmi_rx_double.qsys --

output-directory=./hdmi_rx_double/sim/


file=sopcinfo:./hdmi_rx_double.sopcinfo

--report-file=html:./hdmi_rx_

double.html --report-file=spd:./hdmi_

rx_double/sim/hdmi_rx_double.spd --

report-file=qip:./hdmi_rx_double/sim/

hdmi_rx_double.qip


component-file=./hdmi_tx_single.qsys --

output-directory=./hdmi_tx_single/sim/


file=sopcinfo:./hdmi_tx_single.sopcinfo

--report-file=html:./hdmi_tx_

single.html --report-file=spd:./hdmi_

tx_single/sim/hdmi_tx_single.spd --

report-file=qip:./hdmi_tx_single/sim/

hdmi_tx_single.qip


component-file=./hdmi_tx_double.qsys --

output-directory=./hdmi_tx_double/sim/


file=sopcinfo:./hdmi_tx_double.sopcinfo

--report-file=html:./hdmi_tx_

double.html --report-file=spd:./hdmi_

tx_double/sim/hdmi_tx_double.spd --

report-file=qip:./hdmi_tx_double/sim/

hdmi_tx_double.qip

UG-HDMI2014.12.15 Simulation Walkthrough 7-3

Altera High-Definition Multimedia Interface Simulation Example Altera Corporation

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Command

Merge the four resulting msim_setup.tcl scripts tocreate a single mentor/msim_setup.tcl script.

ip-make-simscript --spd=./hdmi_tx_single/

sim/hdmi_tx_single.spd --spd=./hdmi_tx_

double/sim/hdmi_tx_double.spd --spd=./

hdmi_rx_single/sim/hdmi_rx_single.spd --

spd=./hdmi_rx_double/sim/hdmi_rx_

double.spd

Compile and simulate the design in the ModelSimsoftware.

vsim -c -do msim_hdmi.tcl

Example successful result:

# Resolution = 120 Single RX CRC = 82dd TX CRC =82dd# Resolution = 120 Double RX CRC = 82dd TX CRC =82dd# Resolution = 121 Single RX CRC = 4ef9 TX CRC =4ef9 # Resolution = 121 Double RX CRC = 4ef9 TX CRC =4ef9 # Resolution = 122 Single RX CRC = 1653 TX CRC =1653 # Resolution = 122 Double RX CRC = 1653 TX CRC =1653 # Resolution = 123 Single RX CRC = e907 TX CRC =e907 # Resolution = 123 Double RX CRC = e907 TX CRC =e907 # Resolution = 124 Single RX CRC = 2cfb TX CRC =2cfb # Resolution = 124 Double RX CRC = 2cfb TX CRC =2cfb # Resolution = 125 Single RX CRC = c03d TX CRC =c03d # Resolution = 125 Double RX CRC = c03d TX CRC =c03d # Resolution = 126 Single RX CRC = 0a98 TX CRC =0a98 # Resolution = 126 Double RX CRC = 0a98 TX CRC =0a98 # Resolution = 127 Single RX CRC = 90e5 TX CRC =90e5 # Resolution = 127 Double RX CRC = 90e5 TX CRC =90e5 # Resolution = 128 Single RX CRC = 375d TX CRC =375d # Resolution = 128 Double RX CRC = 375d TX CRC =375d # Resolution = 129 Single RX CRC = 287f TX CRC =287f # Resolution = 129 Double RX CRC = 287f TX CRC =287f # Resolution = 130 Single RX CRC = dbb3 TX CRC =dbb3 # Resolution = 130 Double RX CRC = dbb3 TX CRC =dbb3 # Resolution = 131 Single RX CRC = 301a TX CRC =301a # Resolution = 131 Double RX CRC = 301a TX CRC =301a # Simulation finished

3. View the results.a. Launch the ModelSim GUI with vsim command.b. In the ModelSim Tcl window, execute the dataset open command: dataset open vsim.wlfc. Select View > Open Wave files.d. Load the .do files to view the waveforms.

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Altera Corporation Altera High-Definition Multimedia Interface Simulation Example

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Additional Information for High-DefinitionMultimedia Interface User Guide A

2014.12.15


Document Revision History for High-Definition Multimedia InterfaceUser Guide

Date Version Changes

December2014

2014.12.15 Initial release.

How to Contact Altera

Table A-1: Altera Contact Information

Contact(1) Contact Method Address

Technical support Website www.altera.com/support

Technical trainingWebsite www.altera.com/training

Email [email protected]

Product literature Website www.altera.com/literature

Nontechnical supportGeneral Email [email protected]

Softwarelicensing

Email [email protected]

Related Information

• www.altera.com/support• www.altera.com/training• www.altera.com/literature

(1) You can also contact your local Altera sales office or sales representative.





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