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Distance and distortion estimation method and apparatus in channel optimized vector quantization
Distance and distortion estimation method and apparatus in channel optimized vector quantization
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机译:信道优化矢量量化中的距离失真估计方法和装置
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摘要
A channel optimized vector quantization apparatus includes a device for weighting a sample vector x by a weighting matrix A and a device for weighting a set of code book vectors ĉr by a weighting matrix B. Device form a set of distance measures {dw(Ax,Bĉr)} representing the distance between the weighted sample vector Ax and each weighted code book vector Bĉr. Other device form a set of distortion measures {alphai(x)} by multiplying each distance measure by a channel transition probability Pr|i that an index r has been received at a decoder when an index i has been sent from an encoder and adding together these multiplied distance measures for each possible index r. Finally device determine an index imin corresponding to the smallest distortion measure alphai(x) and represents the sample vector by this index imin.
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