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ARM implements Dolby for STB

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These platforms enable consumers to receive and play content from the Internet and other popular sources like portable storage and computers, apart from traditional broadcast sources

LONDON:An announcement from ARM and embedded media processing systems company, Ittiam, at IBC in Amsterdam reveals that they have succeeded in the implementation of the Dolby MS10 Multistream Decoder on ARM Cortex-A Series of processors including optimization on NEON. The implementation includes Dolby Digital Plus (DD+), Dolby Digital (DD), Dolby Pulse decoder and Dolby Digital Encoder in a single package for next generation digital televisions (DTV) and set-top-boxes (STB), said an EETimes report.

At a time when DTVs and STBs are rapidly evolving into multipurpose digital media platforms for home use, there is an increasing requirement for highly optimized platforms that can meet these demands, especially in the area of high performance audio. These platforms enable consumers to receive and play content from the Internet and other popular sources like portable storage and computers, apart from traditional broadcast sources.

ARM and Ittiam claim that the combination of the ARM Cortex-A9 processor, leading audio standard from Dolby and the high level of software optimization from Ittiam have enabled this development.

For the decoding of a Dolby Digital stream at 48 kHz in 5.1 multi-channel mode, a processing bandwidth of just 22 million cycles per second (MCPS) on the ARM Cortex-A9 processor is required. The bandwidth requirement for HE-AAC v2 (5.1) and DD+ decoders is lower than 50 MCPS each. For encoding, the average performance bandwidth required for the DD 5.1 encoder is less than 70 MCPS , making it very easy to perform both decode and encode on a readily available Cortex-A9 processor based platform.

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