High efficiency coding apparatus

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United States of America Patent

PATENT NO 4845560
SERIAL NO

07195271

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Abstract

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A high efficiency coding apparatus controls the amount of generated information so that it does not surpass the transmission capacity of a transmission path when variable-length coding is employed for varying a word length corresponding to a dynamic range. With respect to a still block, distribution in which a movement amount is introduced is formed taking into account that frame-dropping processing is made to obtain the number of dynamic range occurrence. Not only threshold values in the level direction for defining a word length but also movement threshold values for the frame-dropping processing are changed to control the amount of generated information. As a result, the amount of generated information is controlled excellently without an increase in quantization errors.

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Patent Owner(s)

Patent OwnerAddress
SONY CORPORATION1-7-1 KONAN MINATO-KU TOKYO 1080075 ?1080075

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fujimori, Yashuhiro Kanagawa, JP 1 143
Kondo, Tetsujiro Kanagawa, JP 758 10297

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