IMAGE CODING SYSTEM

Japanese Patent JP2003069999

A

To enhance the coding efficiency in coding the image signal, by dividing a received image signal into blocks, converting each block into a plurality of kinds of coefficients, scanning the coefficients quantized by a prescribed quantization step size by a plurality of kinds of scanning sequences, coding the scanned coefficients by using a plurality of kinds of coding tables, and adaptively selecting a combination with the highest efficiency among combinations of a plurality of kinds of the scanning sequences and a plurality of kinds of coding tables.

The received image signal 1 is divided into blocks, converted into a plurality of kinds of conversion coefficients, quantized by a prescribed step size, the quantized coefficients are scanned according to a plurality of scanning sequences, coded according to a plurality of the coding tables 5, and a selector 9 selects a combination with the highest efficiency among combinations of the plurality of kinds of scanning sequences and the plurality of kinds of coding tables.

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NISHIKAWA HIROBUMI
FUKUHARA TAKAHIRO
ASAI KOTARO
MURAKAMI ATSUMICHI

JP2002167366A

March 07, 2003

March 17, 1995

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MITSUBISHI ELECTRIC CORP

H04N19/60; H03M7/42; H04N19/119; H04N19/12; H04N19/129; H04N19/13; H04N19/134; H04N19/136; H04N19/139; H04N19/14; H04N19/146; H04N19/157; H04N19/159; H04N19/172; H04N19/176; H04N19/196; H04N19/423; H04N19/503; H04N19/51; H04N19/513; H04N19/61; H04N19/91; (IPC1-7): H04N7/30; H03M7/42

Kaneo Miyata (1 person outside)

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