Data processing: generic control systems or specific application – Specific application – apparatus or process – Digital audio data processing system
Patent
1997-07-09
2000-08-22
Isen, Forester W.
Data processing: generic control systems or specific application
Specific application, apparatus or process
Digital audio data processing system
381 22, G06F 1700, H04R 500
Patent
active
061085847
ABSTRACT:
In digital audio decoding, the compressed data of the first two channels of a frame of MPEG multichannel audio are received, parsed and stored in plural spaced sub-blocks of buffer memory. Then, coding information of the same frame is received and interpreted. If the signal includes MPEG-2 multichannel audio, then compressed data of the remaining channels of the frame are received, parsed and interleaved in the sub-blocks. The sub-blocks are read from the buffer and decoded, sub-block by sub-block, transformed into decoded output data of all of the channels for simultaneous output to output devices. Less than 8K-bits read to local memory can be decoded to produce full multiple channel output. A memory controller accesses non-contiguous areas of the buffer memory and reads and writes differing sizes of data blocks. Substantial savings in both on and off chip memory are provided.
REFERENCES:
patent: 5524054 (1996-06-01), Spille
patent: 5835375 (1998-11-01), Kitamura
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patent: 5920353 (1999-07-01), Diaz et al.
patent: 5955746 (1999-09-01), Kim
International Organisation for Standardisation ISO/IEC JTC1/SC29/WG-11 N1519 "Information Technology--Generic Coding of Moving Pictures and Audio: Audio" pp. v-x, 54-59, 69-70, Feb. 20, 1997.
Isen Forester W.
Pendleton Brian Tyrone
Sony Corporation
Sony Electronics Inc.
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