Interframe adaptive vector quantization encoding apparatus and video encoding transmission apparatus.

摘要

In an interframe adaptive quantization apparatus to perform efficient encoding of video signals using vector quantization method, analogue signals are converted into digital signals, the digital signals are subjected to cos conversion and normalization thereby an input vector is formed, the quantization apparatus comprising a vector quantization member including a code table memory for performing vector quantization of the input vector subjected to the cos conversion normalization, a code table updating member where a group of the input vectors of cos conversion normalization quantized into the same index in the vector quantization member are added and averaged and written as new set of output vectors of cos conversion normalization in the code table memory, and a normalization restoration inverse cos conversion member for performing reverse processing to the cos conversion normalization member.