Tensilica Supports MPEG-4 AAC-LC and aacPlus Multi-Channel Decoders for 7.1 Surround Sound

Tensilica has become the first processor IP (intellectual property) company to announce the approval and availability of MPEG-4 AAC-LC, aacPlus v1, and v2 multichannel decoder implementations from Dolby Laboratories. These three multichannel decoders provide up to 7.1-channel surround sound for home entertainment devices. They are available now for the Tensilica HiFi 2 Audio Engine, the most popular audio architecture for system-on-chip design.

aacPlus v1 is a superset of AAC that adds Spectral Band Replication (SBR), a unique bandwidth extension technique that enables audio codecs to deliver the same quality at half the bit rate. aacPlus v2 adds Parametric Stereo (PS), which significantly increases the codec efficiency a second time for low-bit-rate stereo signals. aacPlus v2 is specified as the high-quality audio codec in the 3GPP (3rd Generation Partnership Project), a collaboration for standards for third generation mobile phones.

These new decoders are just three of many Dolby products supported by Tensilica's HiFi 2 Audio Engine. Tensilica also offers Dolby Digital 5.1, Dolby Digital Plus 5.1 and 7.1-channel decoders, Dolby Digital Consumer Encoder 5.1, Dolby Digital Compatible Output 5.1, and AAC-LC, aacPlus v1 and v2 stereo decoders and encoders. The Tensilica HiFi2 Audio Engine is available to users of Tensilica's patented Xtensa configurable processors, and is also available in an off-the-shelf audio DSP IP core the Diamond Standard 330HiFi processor.

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