Vector quantizer

Details Vector quantizer Vector quantizer

H - Electricity

04

N

350/3

H04N 11/00 (2006.01) G06T 9/00 (2006.01) H04N 9/64 (2006.01) H04N 11/04 (2006.01)

Patent

CA 1212452

ABSTRACT OF THE DISCLOSURE A vector quantizer comprises an input vector register for receiving an input vector composed of a block of K (K being more than one) samples; an output vector code table memory for partitioning a signal space Sk of the input vector into subspaces having minimum distorted partition and which stores a set of the representative points of said subspaces produced as output vectors; a mini-max arithmetic operator that detects an output vector which, as a result of mini-max approximation, has been found to be the least distorted from the input vector from among the output vectors successively read from said codetable memory; a coder for encoding the address of said least distorted output vector in said codetable and for delivering the coded address as an output signal; a decoder for reading a corresponding output vector from a decoding output vector code memory using said coded output signal as an address signal. The vector quantizer is used, for example, to process color video signals.

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