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Yamaha decoders eye surround sound systems

Posted: 07 Mar 2003 ?? ?Print Version ?Bookmark and Share

Keywords:Yamaha? decoder ic? yss941? yss942? dolby digital decoder?

Yamaha Corp. has announced the availability of a pair of digital surround decoder LSIs that can be used in a variety of surround sound components, from high-end A/V amplifiers to home theater systems.

The YSS941 and YSS942 are capable of decoding Dolby Digital, Dolby Digital EX, Dolby Pro Logic (48kHz/96kHz), Dolby Pro Logic II (48kHz/96kHz), AAC6, DTS, and DTS-ES Discrete 6.1. In addition, the YSS942 is also capable of decoding DTS 96/24 and DTS 96/24-ES Matrix 6.1 formats.

Manufactured using a 0.15?m CMOS process, the devices feature a high-precision floating point DSP core and built-in RAM and ROM. They also feature an auto-detector to activate the decoder that corresponds to the format of the signal being received, before initializing the decoding process.

Bass management is also built into the architecture to handle optional successive processing for sound field DSP, headphone DSP, and other functions.

Both chips operate at 180MHz and have a 1.2V core with 3.3V-tolerant I/Os. They are available in 144-pin LQFPs and are screened for operation over the -40C to 85C temperature range.

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