http://www.mds.com

For over 14 years Momentum Data Systems has providedhigh performance off-the-shelf audio processing solutions forOEMs and system integrators needing cost effective quicktime to market audio solutions.

Demonstrated at CES 2013, the newest addition to MDS’ A/Vproduct line is a solution for consumer electronics companiesseeking to offer sound bars in their product line but withoutthe resources to tackle the HD audio decoders, HDMIinterfaces, and related technologies needed for today’s fullfeatured products.

The ability to support wireless surround and rear speakersprovides additional opportunities for product differentiationbeyond the basic sound bar configuration.

Based on Texas Instruments (TI) DA830 device combining anARM core (running Linux) with a floating point DSP core, itoffers a range of functional capabilities to allow trade-offsbetween board costs, features, and the amount ofengineering required to create a complete system.

Currently the design shown is used to support MDS in-houseconsulting services for companies looking for assistance withsound bar product development.

A version of this as a purchaseable development kit productis expected to be released in early 2014 after a major updateof the Texas Instruments and MDS developed platformsoftware.

Design optionsThe design is intended to serve as a development platformfor creating derived designs that typically have a subset ofthe features of this platform. This design can be modified inseveral ways; the following lists just some of the possibilities:

• Basic L/C/R bi-amp soundbar with HD audio:• Reduce number of amplifier channels• Remove ethernet/WiFi feature (BT can be retained)• Remove headphone• Use wired sub• Add optional SRS surround virtualizer software

• Wireless audio hub with HD audio:• Remove amplifier board• Add WISA module from Summit (provides 8 channels 24 bit/96

kHz)

• Low cost stereo soundbar (AC3/DTS decode)• Reduce number of amplifier channels• Remove headphone• Use wireless sub option• Remove connectivity features• Use DA828 device in place of DA830

• High performance bar with room correction• Add DA808 DSP for dedicated 96 kHz room correction capability

featuring Dirac processing for sound optimization.

HD AudioSound Bar

Development ServicesFull featured design with support for Dolby and DTS HD audio, HDMI I/O, 25W/driver bi-amp L/C/R, customization of features via software with multiple connectivity options

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5432 Bolsa Ave, Unit B, Huntington Beach, CA 92649Phone: 714-378-5805

http://www.mds.com

HD Audio Sound Bar Development

System feature summary• Single chip Audio SoC

• Linux based ARM host offers exceptional software flexibility• Powerful floating point DSP provides superior performance and

opportunity for further unique product features

• MDS’ AvCtrl library, which simplifies host side control of the DSP signal chain

• External audio (HDMI, SPDIF, ADC) connects directly to DSP, keeping host free for other tasks.

• DSP supports legacy and HD (Blu Ray) Dolby and DTS formats

• Standard DSP post processing includes• PLIIX and Neo,• bass management with per speaker cutoffs,• tone control & per channel multi-band parametric EQ

• Numerous DSP post processing options including Dolby Volume, SRS (now DTS) TruSurround, etc.

• Wireless sub, surrounds, and rear supported to provide a full 7.1 system

• L/C/R biamp configuration supports adjustable crossover and driver correction filters

• HDMI input with support for pass through of 1.4 3D for-mats

• Full HDCP repeater support• HDMI Audio Return Channel (ARC) supported• On Screen Display (OSD)• Analog, SPDIF and TOS input • Stereo or headphone output• Ability to add a 2nd DSP for 96 kHz processing and more

extensive post processing (including Dirac Room Correc-tion) to create a flagship product

• Streaming support via Ethernet or WiFi network• Bluetooth support• Setup/control over TCP/IP and/or Bluetooth• Amplifier options from 10W to 300W per channel.• 0.5W standby capable in custom systems

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5432 Bolsa Ave, Unit B, Huntington Beach, CA 92649Phone: 714-378-5805

http://www.mds.com

HD Audio Sound Bar Development

Decoder and post processing DSP firmwareThe following standard audio signal processing (ASP)functions are provided in the system’s firmware. Note thatpatent holder license agreements are required for accessand/or use of some these ASPs (Dolby, DTS, etc.).

On single DSP systems the back-end processing can be up toa 7.2 configuration, which can include traditional 5.1 plus twoheight channels when using PLIIz. On dual DSP systems thedecode/matrix output can be 9.3 and post processing canoperate at 96 kHz.

The Bass Management (BM) ASP supports differentcrossovers for each set of speakers, allowing (for example)for smaller surround and/or rears without loss of content.

Standard decoders• Dolby TrueHD, Dolby Digital Plus, Dolby Digital EX, Dolby Pro

Logic IIxz• DTS-HD, DTS-ES 96/24,DTS Neo:6, DTS 5.1 • AAC decode (ISO/IEC 13818-7:1997 5.1.0.0)

Standard ASPs• BM - Bass Management II (per speaker bass management)• RVB - TI Room Simulator Library • GEQ - TI Filter Library (configured for 8 bands/chan, common

coefficient) [Normally disabled and PEQ used instead]• TI processor loading• Audio stream split• SRC - Sample rate conversion• DEL - Speaker delay• SNG - Signal/Noise generator• DM - Downmix• MTX - Matrix (stereo to multichannel)• TC - Tone controls• PEQ - Parametric Eq allows up to 32 different bands of eq per

channel (5 bands on single DSP) • Advanced NIC - provides additional status and control capability

ASPs from 3rd partiesSubject to availability; may require additional fees includingalgorithm porting charges.

• Dolby Volume • THX Ultra2, THX Select2, Neural-THX Surround • Dirac Live room correction (dual DSP needed for 7.1 channel sur-

round systems at 96 kHz, single DSP for 3.1 48 kHz)• SRS (now DTS) TruSurround (Virtual speaker)

Wireless optionsThere are several options present on the developmentplatform hardware for both wireless sources as well aswireless speaker operation.

WiFi and BlueTooth supportUsing TI’s WiLink8 module, the design can incorporate802.11 wireless connectivity for streaming audio, as well asfor local pairing with Bluetooth Audio sources or for playbackto Bluetooth headphones. A Bluetooth only version isavailable when WiFi is not required.

Wireless subwooferTI’s low cost CC8520 transmitter provides a reliablemechanism for adding a powered subwoofer to a sound barsystem.

Multichannel wireless speakersThe design provides a direct connection to a WISA compliantSummit Wireless transmit module to allow adding wirelesssubs, surrounds, and rear speakers to the system. SummitSemiconductor and their OEM partners offer receiver/amplifier subsystems designed for integration into speakerenclosures for sub, surround, and rear channels.

Summit Wireless' SpeakerFinder automatic setup andMyZone listener location optimization is supported byadding two ultrasonic transceivers to the soundbar and oneper wireless surround speaker in the system. A pingerincorporated into the remote supports further automaticoptimization by the listener.

The Summit Wireless transmitter queries each speaker todetermine crossover points and sensitivity, no userintervention is required for setup. Up to 8 channels of 24 bitaudio at 96 kHz can be supported (note that for 96 kHz systemoperation dual DSPs are generally required).

WISA compliant 8 channel wireless audio option

Dolby, DTS, WISA, HDMI, HDCP, DLNA, MyZone, Bluetooth, Neo, THX, SRS, Pandora, Rhapsody, vTuner are all trademarks of their respective holders.

5432 Bolsa Ave, Unit B, Huntington Beach, CA 92649Phone: 714-378-5805

http://www.mds.com

HD Audio Sound Bar Development

Design LicenseA typical design package consists of a reference board,schematics, layout, and firmware (a combination of sourceand binary files) for the DA830.

As illustrated by the block diagram on the prior page, thedesign provided by MDS includes four PCBs: the main boardwhich includes the I/O and processors; HDMI board; theamplifier board; and a front panel board. A 24V supply isused to power the system.

The design can be repartitioned to accommodate mechanicalissues, for example the I/O may need to be moved to theirown board or a LCD or VFD based front panel may be desiredfor operation without a TV attached.

As the basic design offers multiple hardware, firmware, andsoftware options please contact MDS with your specificrequirements.

Third party IP licensesThere are a number of software and hardware features thatuse patented technology. The development platform doesnot convey any license to use those technologies.

As every application is different MDS can not provide specificguidance on licensing other than to provide contactinformation to the relevant IP holders.

Examples of IP used in a product may include:

• Decoders from Dolby and DTS• HDMI and HDCP• Streaming decoders such as MP3 and AAC• Network protocols such as DLNA

Rev 3b, Oct 2013. Specifications subject to change.

Main board with DSP. Connections at left for HDMI interface board and amplifier connections at right.