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Audio DSP line adds performance, features for consumer apps

Posted: 01 Sep 2005 ?? ?Print Version ?Bookmark and Share

Keywords:texas instruments? ti? aureus? digital signal processing? dsp?

Texas Instruments Inc. (TI) has beefed-up its Aureus family of audio DSP chips, a move that will enable consumer electronics manufacturers to provide more performance and features for applications requiring multi-channel decoding, including audio/video and DVD receivers, home-theater-in-a-box systems (HTIBs), set-top boxes, mini-compos, high-definition televisions (HDTV) and automotive navigation/multimedia systems.

The newest entries are the 300MHz TMS320DA710 and 250MHz TMS320DA708. The DA710 is a 1,800MFLOP device while the DA708 is a 1,500MFLOP DSP. The DA7xx family is code-compatible with TI's previous generations of the Aureus family and built upon TI's 32bit floating-point TMS32067x DSP architecture.

Each of the devices has 256KB of SRAM, 768KB of ROM and 32KB of instruction cache. Earlier DA6xx DSPs, which have been available since 2002, run at 225MHz and 250MHz and have less on-chip memory.

Architectural enhancements specifically designed for high-performance audio processing enable efficient use of the extensive headroom available on DA7xx devices. New mixed-precision instructions allow for higher quality bass management and equalization algorithms without the performance impact of using double-precision. An audio-optimized Dual Data Movement Accelerator (DMAX) performs efficient non-sequential external memory accesses and circular buffer management, improving the performance of long delay line algorithms, such as reverb. Additionally, the CPU core and memory subsystem were enhanced and the amount of parallel processing was increased, resulting in higher performance in audio applications.

Among the other notable differentiating features of the new units involves their external memory interface and high-speed interface. The DA710 has a 32bit external memory interface while the DA708 has a 16bit EMIF. The DA710 has a high-speed peripheral interface while the DA708 does not.

DA7xx devices are backed by the company's Audio Software Library, an end-to-end system software solution that includes industry-standard decoders and post-processors from Dolby, DTS, THX and Microsoft. The Performance Audio Software Library is based on TI's XDAIS algorithm standard, which allows OEMs and third parties to create plug-and-play algorithms. Third parties are supporting the Performance Audio Library, including Audyssey, SRS, Waves and Neural. This enables OEMs to more efficiently develop and customize audio algorithms, getting products to market faster, quickly spinning derivative products by adding new features, and reducing development costs in general.

The DA7xx devices leverage TI's investment in C6000 tools including the Code Composer Studio IDE and C compiler. Developers can get started today with DA710 and DA708 EVMs from Momentum Data Systems. The EVMs include digital I/O, multi-channel analog I/O and all the other system components required to prototype a typical AV receiver system.

- Marty Gold


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