Multi-Rate Algebraic Vector Quantization with Supplemental Coding of Missing Spectrum Sub-Bands
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United States of America Patent
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Issued Date -
Jun 14, 2012
app pub date -
Jun 16, 2011
filing date -
Jun 17, 2010
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Abandoned
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Abstract
In a multi-rate algebraic vector quantizer and quantizing method for coding spectral coefficients of a plurality of frequency sub-bands, a quantizer portion is supplied with the spectral coefficients of the sub-bands. The quantizer portion has a plurality of codebooks each including a plurality of vectors, and first coders of quantizer parameters identifying the codebooks and vectors used for coding the spectral coefficients of the sub-bands. A second coder processes supplemental information usable to improve, at a dequantizer, decoded spectral coefficients of the sub-bands. Corresponding multi-rate algebraic vector dequantizer and dequantizing method are also provided.
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