Interframe adaptive vector quantization encoding apparatus

Details Interframe adaptive vector quantization encoding apparatus Interframe adaptive vector quantization encoding apparatus

H - Electricity

04

N

350/33

H04N 7/28 (2006.01) G06T 9/00 (2006.01) H04N 7/32 (2006.01) H04N 7/36 (2006.01) H04N 11/04 (2006.01) H04N 7/60 (2006.01)

Patent

CA 1289656

ABSTRACT OF THE DISCLOSURE In an interframe adaptive quantization encoding apparatus to perform efficient encoding of video signals using vector quantization method, analog signals raster- scanned 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 quantiza- tion 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 detection circuit and made amplitude coefficient, thereby efficient encoding is performed. The efficient encoding data is transmitted to the transmission path by a transmission data buffer and at the same time threshold value of movement detection in the vector quantization encoding is controlled by a movement detection control circuit, and the encoding data supplied from the vector quantizer is decoded by a vector quantization decoder and the block data is reproduced, thereby the apparatus can be constituted without increasing the circuit scale.

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