Image analysis – Image compression or coding – Including details of decompression
Patent
1997-11-17
2000-12-05
Boudreau, Leo H.
Image analysis
Image compression or coding
Including details of decompression
382166, 382248, 382281, 348403, 708400, G06K 936
Patent
active
061577405
ABSTRACT:
A compression/decompression engine is disclosed for reducing memory requirements of a decode system by storing decoded video data in compressed form. The compression engine comprises parsing chrominance UV data into separate chrominance U data and chrominance V data, and transform logic implementing a Hadamard transformation of multiple bytes of decoded video data in parallel into frequency domain signals. Compression logic is coupled to the transform logic and performs, preferably, a 2:1 transformation of the frequency domain signals to produce compressed video signals for storage in memory. The transform logic and compression logic transform and compress multiple bytes of decoded video data in parallel within a single clock cycle of the decode system. Upon retrieval from memory, the compressed data is returned to original format by the decompression engine, which employs the same transform logic as used by the compression engine. Reassembly logic then returns the separate chrominance U data and chrominance V data to chrominance UV data for use by the associated motion compensation unit or for display.
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Buerkle Daniel J.
Ngai Chuck H.
Boudreau Leo H.
International Business Machines - Corporation
Sherali Ishrat
Steinberg, Esq. William H.
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