Vector quantization with a non-structured codebook for audio compression
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United States of America Patent
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Oct 4, 2005
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N/A
app pub date -
Aug 25, 2000
filing date -
Oct 4, 1999
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Abstract
According to one embodiment of the invention, a multistage vector list quantizer comprises a first stage quantizer to select candidate first stage codewords from a plurality of first stage codewords, a reference table memory storing a set of second stage codewords for each first stage codeword, and a second stage codebook constructor to generate a reduced complexity second stage codebook that is the union of sets corresponding to the candidate first stage codewords selected by the first stage quantizer.
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