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METHOD AND APPARATUS FOR PYRAMID VECTOR QUANTIZATION INDEXING AND DE-INDEXING OF AUDIO/VIDEO SAMPLE VECTORS
METHOD AND APPARATUS FOR PYRAMID VECTOR QUANTIZATION INDEXING AND DE-INDEXING OF AUDIO/VIDEO SAMPLE VECTORS
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机译:用于金字塔矢量量化索引和音频/视频样本向量的解索的方法和装置
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摘要
A method for pyramid vector quantization deindexing of coefficients derived from an audio or video signal includes receiving a first sign and an input index as codewords from an ingoing bit stream. The first sign and the input index represent the coefficients, and the first sign is a sign of a first or last non-zero coefficient in an output vector to be created. The method includes deindexing the input index into the output vector with a pyramid vector quantization de-enumeration scheme, assigning a sign of the first or last non-zero coefficient in the output vector according to the received first sign, and outputting the output vector.
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