Interframe adaptive vector quantization encoding apparatus

Abstract From the Canadian patent

In an interframe adaptive quantization encoding apparatus to perform efficient encoding of video signals using vector quantization method, analog signals rasterscanned from the left to the right on the screen and from the upper side to the lower side are converted into digital signals, the digital signals per every m picture elements x n lines are made a block and the block data is subjected to mean value separation in a vector quantization encoder thereby input vector is formed inner, product between the input vector and output vector read from a code book ROM is estimated by an inner product operation circuit, and maximum value of the inner product is estimated by a maximum inner product …