Patent ID: 7151856
Filing Date: 2006-12-19
Classification: G06T

Abstract:
1. A picture coding apparatus for coding a picture signal inputted sequentially on a frame-by-frame basis, the picture coding apparatus comprising: a frame rate receiving unit operable to receive frame rate information indicating a cycle of the coding; a total bits number specifying unit operable to specify the total number of bits allocatable to a frame group including a plurality of frames; a frames number specifying unit operable to specify, based on the received frame rate information and the number of frames which are already coded, the number of frames which are not coded in the frame group; a target bits number calculating unit operable to calculate, based on the specified total number of bits and the specified number of frames, the target number of bits to be allocated to a frame to be coded next; a quantization step calculating unit operable to calculate, using the calculated target number of bits, a quantization step for the frame to be coded next; and a coding unit operable to perform quantization based on the calculated quantization step and to perform coding based on the quantization.