Santa Clara, Calif. - HiFi EP from Tensilica is a superset of the HiFi 2 architecture optimized for simultaneous multichannel codec support. The new DSP core has been enhanced for efficient, high-quality voice pre- and post-processing, resulting in up to 40 percent lower power and up to a 50 percent size reduction. It is targeted for use in home entertainment products such as Blu-ray Disc players, digital television (DTV), and Smartphones.
The HiFi EP Audio DSP adds a 32x24 MAC (multiply accumulator) for higher performance at lower power on the DTS Master Audio Lossless decoder used in Blu-ray Disc devices. DTS Master Audio decoding on the HiFi EP DSP requires only 115 MHz of processing power, a savings of over 40 percent compared to other licensable DSP cores, thus reducing power consumption and making it possible to implement a full Blu-ray-Disc-capable home entertainment audio subsystem on only one HiFi EP core. Other DSP architectures require the use of two on-chip DSPs, which translates into an increase of 2x or more in chip area and power.
Because of the efficiency of the architecture, power consumption is minimized, making HiFi EP ideal for low-power portable applications. To address the increasingly demanding requirements in mobile and VoIP (Voice over Internet Protocol) applications for better immunity to background noise and speakerphone mode quality, new instructions have been added to accelerate voice pre- and post-processing for noise cancellation and beam forming microphones. These instructions also provide better general DSP capabilities.
Tensilica has enhanced the cache memory subsystem for HiFi EP DSPs with a predictive prefetch unit to improve performance in high memory latency SOC designs, while preserving ease of programming. In a Blu-ray Disc SOC with a typical 100 cycle memory access latency to off-chip memory, a HiFi EP DSP can run the complete worst-case workload Blu-ray Disc suite (DTS Master Audio Lossless 5.1 ch @ 192 kHz, DTS Express 5.1 ch. at 48 kHz, upsample, downsample, mixing and DTS Transcode to 5.1 ch. at 48 kHz) in only 384 MHz. Competing architectures often require 600 to 800 MHz of DSP bandwidth for the same workload.
"Chip designers have a choice of two software-compatible products," stated Steve Roddy, Tensilica's vice president of marketing and business development. "For most products, our standard HiFi 2 Audio DSP provides higher performance than most competing solutions. However, for high-quality voice in mobile applications and for high-end home entertainment products, our new HiFi EP DSP is the right choice.
Because the HiFi Audio DSPs are fully programmable, multiple audio standards can run on the same hardware, allowing the same silicon to be used for multiple applications or the same device to play or record audio in different standards. Decoders and, in many cases, encoders are now available from Tensilica for: AMR narrowband and wideband; DAB/MP2; DAB+; Dolby Digital AC-3; Dolby Digital Compatible Output; Dolby Digital Plus 5.1 and 7.1 channels; Dolby ProLogic II and IIx; Dolby Digital TrueHD; DTS-HD Master Audio; DTS Express: DTS Transcode; DTS Neo:6; G.729AB speech; MP3; MPEG-4 aacPlus v1 and v2; MPEG 2/4 AAC LC; MPEG-4 BSAC; Ogg Vorbis; RealAudio 8, 9 and 10; and WMA. Additional audio software packages are available from AM3D, QSound Labs, SPIRIT DSP, and SRS Labs.
For more information visit www.tensilica.com.