Image analysis – Image compression or coding – Quantization
Patent
1995-11-21
1999-03-30
Moore, David K.
Image analysis
Image compression or coding
Quantization
382239, H04N 718
Patent
active
058898913
ABSTRACT:
Vectors associated with multiple sources are quantized with a codebook. A mapping function associates each source with a subset of codevectors in the codebook, each subset being defined prior to quantization. Each vector from a source is matched to a codevector in the subset corresponding to the source. The universal codebook is designed by first providing a codebook and a mapping function. Using the codebook, the mapping function is updated by identifying subsets that reduce distortion when vectors from a source are quantized using a corresponding subset.
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Gersho Allen
Ramakrishnan Sangeeta
Rose Kenneth
Brinich Stephen
Moore David K.
Regents of the University of California
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