DSPs bring high-fidelity audio to home theater systems

Dallas, Tex. — Texas Instruments Incorporated (TI) has launched its Aureus generation of audio digital signal processors (DSPs), which TI says is the first audio/video receiver (AVR) implementation approved for both Dolby TrueHD and Dolby Digital Plus.

The AVRs, based on TI's Aureus DA7xx DSPs, will enable manufacturers to provide consumers with high definition (HD) Dolby surround sound from next-generation HD DVD and Blu-Ray Disc players, recorders and home theater in a box (HTIB) systems, which enable enhanced audio features such as the decoding of up to eight discrete channels of lossless 192 kHz audio delivered synchronously over High-Definition Multimedia Interface (HDMI).

As home theater systems continue to transition to blue laser technology, the implementation of the Aureus DSPs, which support both Dolby TrueHD and Dolby Digital Plus, enables other enhanced audio features, such as the mix of primary and secondary audio streams, even if they have different sample rates, as well as a third audio stream for controls, said TI. For example, the mix of primary and secondary streams provides users with the ability to play a movie soundtrack and the director's commentary simultaneously, together with “button sounds” corresponding with remote control operations. The DA7xx Aureus DSP also can accommodate customized audio enhancements such as virtualization or surround sound technology for headphones.

A single Aureus DSP is capable of full performance decoding (8-channel, 192 kHz/24-bit HD audio) as well as additional post-processing at the native sample rate without down sampling. The audio bitstream can be decoded and post-processed in real-time to suit a user's listening setup and preferences.

TI said it integrated the HD audio decoders into the existing Aureus software solution and system framework to ease the design process for manufacturers. The Aureus DSP is also fully compatible with HDMI 1.3 transmission technology, which transfers HD audio into the AVR such as the VastLane solution from Silicon Image. In addition, the performance audio framework enables OEMs to easily plug in differentiating post-processing modules from TI or algorithms from Aureus-supported third parties including Dolby Pro Logic IIx, Dolby Headphone, Dolby Virtual Speaker, Audyssey MultEQ XT, Neural-THX Surround, SRS Circle Surround II and THX Ultra 2.

The Aureus processors target a wide range of home theater and automotive products requiring multi-channel decoding and high-speed encoding. The Aureus product line consists of a 32/64-bit floating-point programmable DSP and a comprehensive software solution, enabling multi-channel decoding applications.

Availability: The 32-bit floating point Aureus DA7xx HD decoder solutions are currently available in production volume in a 256-ball BGA package and 144-pin TQFP package through select TI regional third-party providers. Aureus devices and the accompanying software solution and system framework are in production today, and supported by TI's Code Composer Studio development tools.
Product information: Aureus DSPs and Audio Solutions Guide

Texas Instruments , 1-800-336-5236,

0 comments on “DSPs bring high-fidelity audio to home theater systems

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.