Fast requantization apparatus and method for MPEG audio decoding

Details Fast requantization apparatus and method for MPEG audio decoding Fast requantization apparatus and method for MPEG audio decoding

1996-10-15

1999-04-06

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Audio signal bandwidth compression or expansion

704229, 704230, 395800, G10L 900, G06F 1300

Patent

active

058930663

ABSTRACT:
An audio decoder in a multimedia processor improves decoding efficiency and performance through the usage of multiple parallel processors including a scalar processor and a vector processor. The scalar processor most efficiently performs tasks including bit manipulation, indexing and conditional operations. The vector processor most efficiently performs operations involving multiple data calculations, operating on unconditional, sequential data. Improved performance is achieved by executing as many operations as possible on the vector processor, rather than the scalar processor, so long as the data is sequential data. The audio decoder includes a requantization program code that shifts data handling operations from the scalar processor to the vector processor through the conversion of nonsequential data to sequential data, thereby "vectorizing" the data.

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