Picture coding apparatus

Details Picture coding apparatus Picture coding apparatus

H - Electricity

04

N

350/33

H04N 7/32 (2006.01) G06T 9/00 (2006.01) H04N 7/36 (2006.01) H04N 7/46 (2006.01)

Patent

CA 2028947

ABSTRACT OF THE DISCLOSURE In the invention, a coding controller takes a buffer occupancy at present from a transmission buffer, and first normalized value evaluating means outputs a first normalized value being independent of a video rate and a frame rate for the number of bits per n x QB and second normalized value evaluating means outputs a second normalized value for the number of bits per one frame. When the number of bits is relatively small, a second quantization characteristics control table is selected in a selector and the coding control every frame is performed. When the number of bits is large, a first quantization characteristics control table is selected in the selector and the control every n x QB is performed instead of the control every frame and the quantization characteristics control signal is outputted.

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