High efficiency coding apparatus

Details High efficiency coding apparatus High efficiency coding apparatus

H - Electricity

04

N

350/33

H04N 7/12 (2006.01) H04N 5/926 (2006.01) H04N 7/26 (2006.01) H04N 7/46 (2006.01)

Patent

CA 1288507

ABSTRACT A high efficiency coding apparatus performs the control so that the amount of generated information does not surpass a transmission capacity of a transmission path when variable-length coding 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 control of the amount of generated information is performed excellently without an increase in quantization errors.

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