Method for decoding MPEG audio data

Details Method for decoding MPEG audio data Method for decoding MPEG audio data

1995-10-26

1999-01-26

Dorvil, Richemond

Data processing: speech signal processing, linguistics, language

Audio signal time compression or expansion

704230, G10L 302

Patent

active

058648178

ABSTRACT:
An MPEG audio/video decoder has memories, a signal processing unit (SPU) including a multiplier and a butterfly unit, a main CPU, and a memory controller which are time division multiplexed between decoding video and audio data. For audio decoding, the butterfly unit determines combinations of components of a frequency-domain vector to reduce the number of multiplies required to transform to the time domain (matrixing). Matrixing is interwoven with MPEG filtering to increase throughput of the decoder by increasing parallel use of the multiplier, the butterfly unit, and a memory controller.

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