Dolby Virtual Speaker / Dolby Headphone with Dolby Pro ... Virtual Speaker / Dolby Headphone with Dolby Pro Logic IIx Decoder ... Dolby Virtual Speaker / Bass Management are only effective

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  • NJU26226

    - 1 -Ver.2011-12-26

    Dolby Virtual Speaker / Dolby Headphone

    with Dolby Pro Logic IIx Decoder ! General Description NJU26226 expand stereo or 5.1 surround signal to 6.1 or 7.1 channel surround sound by Dolby Pro Logic IIx technology. NJU26226 provides a highly realistic multi channel speaker surround sound listening environment from as few as headphone or two speakers using Dolby Pro Logic IIx and Dolby Headphone / Dolby Virtual Speaker technology. NJU26226 is suitable for Gaming Headsets, digital TVs, stereo mini-components, PCs, and any audio/visual products. ! Features -Software # Dolby Pro Logic IIx (Max 7.1ch Output) # Dolby Virtual Speaker * # Dolby Headphone # Bass Management system * # Pink Noise Generator # Multi-channel signals input (Max 7.1ch Input) *: Dolby Virtual Speaker and Bass Management effective only up to 5.1 channels.

    -Hardware # 24bit Fixed-point Digital Signal Processing # Maximum Clock Frequency : 12.288MHz(Standard), built-in PLL Circuit # Digital Audio Interface : 4 Input ports / 4 Output ports # Digital Audio Format : I2S 24bit, left-justified, right-justified, BCK : 32fs/64fs # Master / Slave Mode

    - In Master mode, MCK : 256fs @fs=48kHz / 384fs @fs=32kHz # Microcomputer Interface

    - I2C Bus (Standard-mode/100kbps, Fast-mode/400kbps) - 4 -Wire Serial Bus (4-Wire: Clock, Enable, Input data, Output data)

    # Operating Voltage : VDD = VDDPLL = 1.8V : VDDIO = 3.3V

    # Input Terminal : 5.0V Input tolerant # Package : SSOP44 (Pb-Free)

    * The detail hardware specification of the NJU26226 is described in the NJU26200 Series Hardware Data Sheet.

    Package

    NJU26226V

  • NJU26226

    - 2 - Ver.2011-12-26

    ! Block Diagram

    TIMINGGENERATOR

    / PLL

    PROGRAMCONTROL

    ALU

    24-BIT x 24-BITMULTIPLIER

    ADDRESS GENERATION UNIT

    FIRMWAREROM

    DATARAM

    SERIALHOST

    INTERFACE

    General I/OINTERFACE

    SDO0

    SDO3

    BCKI

    SCL/SCK

    SDA/SDOUT

    AD1/SDIN AD2/SSb

    CLK

    CLKOUT

    RESETb

    24bit Fixed-point DSP Core

    SDO1

    LRI

    MCK

    BCKO

    LRO

    NJU26226

    SDO2

    WDC

    SEL

    MUTEb

    PROC

    SERIAL AUDIOINTERFACE SDI0

    SDI3

    SDI1

    SDI2

    Fig. 1 NJU26226 Hardware Block Diagram

    ! Function Block Diagram

    NJU26226 Features Overview

    Pink NoiseGenerator

    L/R

    C/SW

    Ls/Rs

    Lb/Rb

    L/R

    C/SW

    Ls/Rs

    Lb/Rb

    Pro Logic IIx

    Dolby VirtualSpeaker (5.1ch)

    /D

    olby Headphone (7.1ch)

    Output Trim

    mer

    (Master &

    L/R/C

    /Ls/Rs/Lb/R

    b/Sw)

    Dolby Virtual Speaker / Bass Management are only effective for 5.1ch signal

    Input Trimm

    er

    Bass M

    anagement

    Fig. 2.1 NJU26226 Block Diagram (Outline)

  • NJU26226

    - 3 -Ver.2011-12-26

    SDI2

    SDI3

    MUTE

    SDI0

    SDI1

    L/R

    SDI2

    SDI3

    MUTE

    SDI0

    SDI1

    C/SW

    SDI2

    SDI3

    MUTE

    SDI0

    SDI1

    Ls/Rs

    SDI2

    SDI3

    MUTE

    SDI0

    SDI1

    Lb/Rb

    Ls/Rs

    Lb/Rb

    MUTE

    L/R

    C/SW

    SDO0

    Ls/Rs

    Lb/Rb

    MUTE

    L/R

    C/SW

    SDO1

    Ls/Rs

    Lb/Rb

    MUTE

    L/R

    C/SW

    SDO2

    Ls/Rs

    Lb/Rb

    MUTE

    L/R

    C/SW

    SDO3

    Input signal select Output signal select

    Fig. 2.2 NJU26226 Block Diagram (Input Select block, Output Select block)

  • NJU26226

    - 4 - Ver.2011-12-26

    ProLogic IIx

    Input Trimm

    er

    Lb

    Sw

    Rb

    Ls

    Rs

    L

    R

    C

    Dolby H

    eadphone

    + LPF +

    ++

    L out

    R out

    Ls/Rs delay

    input mode = 2.1chDolbyHeadphone enable

    Lb/Rb delay

    Sw out

    PLIIx SW

    LFE Gen. SW

    SW Downmix SW

    Fig. 2.3 NJU26226 Block Diagram (detail)

    ProLogic IIx

    Input Trimm

    er

    Lb

    Sw

    Rb

    Ls

    Rs

    L

    R

    C

    Dolby H

    eadphone

    + LPF +

    ++

    L out

    R out

    input mode = 5.1chDolbyHeadphone enable

    Ls/Rs delay

    Lb/Rb delay

    Sw out

    L/R/C

    delay

    PLIIx SW

    LFE Gen. SW

    SW Downmix SW

    Fig. 2.4 NJU26226 Block Diagram (detail)

    Ls/Rs delay

    Lb/Rb delay

    Input Trimm

    er

    Lb

    Sw

    Rb

    Ls

    Rs

    L

    R

    C

    Dolby H

    eadphone

    + LPF +

    ++

    L out

    R out

    input mode = 7.1chDolbyHeadphone enable

    Sw out

    LFE Gen. SW

    SW Downmix SW

    Fig. 2.5 NJU26226 Block Diagram (detail)

  • NJU26226

    - 5 -Ver.2011-12-26

    ProLogic IIx

    Input Trimm

    er

    Lb

    Sw

    Rb

    Ls

    Rs

    L

    R

    C

    + LPF +

    input mode = 2.1chDolby Headphone / Dolby Virtual Speaker disable

    Lb out

    Sw out

    Rb out

    Ls out

    Rs out

    L out

    R out

    C out

    Ls/Rs delay

    Lb/Rb delay

    C delay

    PLIIx SW

    LFE Gen. SW

    BM SW

    Bass M

    anagement

    ProLogic IIxTwo- To

    Four ChannelExpander

    PLIIx SW

    Control Voltage

    Fig. 2.6 NJU26226 Block Diagram (detail)

    Lb

    Sw

    Rb

    Ls

    Rs

    L

    R

    C

    + LPF +

    input mode = 5.1chDolby Headphone / Dolby Virtual Speaker disable

    Lb out

    Sw out

    Rb out

    Ls out

    Rs out

    L out

    R out

    C out

    Ls/Rs delay

    Lb/Rb delay

    C delay

    PLIIx SW

    LFE Gen. SW

    BM SW

    ProLogic IIx

    L/R/C

    delay

    Bass M

    anagement

    Input Trimm

    er

    Fig. 2.7 NJU26226 Block Diagram (detail) Input Trim

    mer

    Lb

    Sw

    Rb

    Ls

    Rs

    L

    R

    C

    + LPF +

    input mode = 7.1chDolby Headphone / Dolby Virtual Speaker disable

    Bass

    Managem

    ent

    Lb out

    Sw out

    Rb out

    Ls out

    Rs out

    L out

    R out

    C out

    Ls/Rs delay

    Lb/Rb delay

    C delay

    LFE Gen. SW

    BM SW

    Fig. 2.8 NJU26226 Block Diagram (detail)

  • NJU26226

    - 6 - Ver.2011-12-26

    Ls/Rs delay

    Sw out

    Ls out

    Rs out

    L out

    R out

    C out

    input mode = 2.1chDolby Virtual Speaker enable, 2speaker layout / 3speaker layout

    ProLogic II

    Input Trimm

    er

    Sw

    Ls

    Rs

    L

    R

    C

    Dolby

    Virtual Speaker

    + LPF +

    ++

    Ls/Rs delay

    Bass M

    anagement

    PLII SW

    LFE Gen. SW

    SW Downmix SW

    BM SW

    Fig. 2.9 NJU26226 Block Diagram (detail)

    Ls/Rs delay

    Sw out

    Ls out

    Rs out

    L out

    R out

    C out

    input mode = 2.1chDolby Virtual Speaker enable, 4speaker layout / 5speaker layout

    ProLogic II

    Input Trimm

    er

    Sw

    Ls

    Rs

    L

    R

    C

    Dolby

    Virtual Speaker

    + LPF +

    ++

    Bass M

    anagement

    Ls/Rs delay

    PLII SW

    LFE Gen. SW

    SW Downmix SW

    BM SW

    Fig. 2.10 NJU26226 Block Diagram (detail)

    Sw out

    Ls out

    Rs out

    L out

    R out

    C out

    input mode = 5.1chDolby Virtual Speaker enable

    Input Trimm

    er

    Sw

    Ls

    Rs

    L

    R

    C

    Dolby

    Virtual Speaker

    + LPF +

    ++

    Bass M

    anagement

    Ls/Rs delay

    LFE Gen. SW

    SW Downmix SW

    BM SW

    Fig. 2.11 NJU26226 Block Diagram (detail)

  • NJU26226

    - 7 -Ver.2011-12-26

    Bass M

    anagement

    HPF / Through

    (Depend on

    Ls/Rs speaker

    size setting)

    L

    R

    C

    SW

    Ls

    Rs

    Lb

    Rb

    Bass ManagementLFE Trim

    Bass M

    anagement M

    aster Volume

    L

    R

    C

    SW

    Ls

    Rs

    Lb

    Rb

    Bass ManagementL Trim

    Bass ManagementR Trim

    Bass ManagementC Trim

    Bass ManagementSW Trim

    Bass ManagementLs Trim

    Bass ManagementRs Trim

    Bass ManagementLs Trim

    Bass ManagementRs Trim

    BASS MANAGEMENT BLOCK

    Fig. 2.12 NJU26226 Block Diagram (Bass Management block)

    L

    R

    C

    SW

    Ls

    Rs

    Lb

    Rb

    PINK NOISE GENERATOR BLOCK

    L

    R

    C

    SW

    Ls

    Rs

    Lb

    Rb

    PNG enable SW

    Pink NoiseGenerator

    Fig. 2.13 NJU26226 Block Diagram (Pink Noise Generator block)

  • NJU26226

    - 8 - Ver.2011-12-26

    L

    R

    C

    SW

    Ls

    Rs

    Lb

    Rb

    DVS/DH L/R input Trimmer

    DVS/DH Center input Trimmer

    DVS/DH LS/RS input Trimmer

    DVS/DH LB/RB input Trimmer

    DVS/DH LFE input Trimmer

    DVS/DH stereo bypass downmix trimmer (front)

    DVS/DH stereo bypass downmix trimmer (center)

    DVS/DH stereo bypass downmix trimmer (surround)

    DVS/DH stereo bypass downmix trimmer(back surround)

    DVS/DH stereo bypass downmix trimmer (lfe)

    Dolby H

    eadphoneLt/R

    t Dow

    nmix

    Lo/Ro D

    ownm

    ixB

    ypass

    DOLBY HEADPHONE BLOCK DVS/DH output mode

    L

    R

    C

    SW

    Ls

    Rs

    Lb

    Rb

    -6dB

    Fig. 2.14 NJU26226 Block Diagram (Dolby Headphone block)

    L

    R

    C

    SW

    Ls

    Rs

    Lb

    Rb

    DVS/DH L/R input Trimmer

    DVS/DH Center input Trimmer

    DVS/DH LS/RS input Trimmer

    DVS/DH LFE input Trimmer

    DVS/DH stereo bypass downmix trimmer (front)

    DVS/DH stere