| 摘要 |
<P>PROBLEM TO BE SOLVED: To appropriately distribute data in the case of performing hierarchical encoding based on a temporal scalability function. <P>SOLUTION: An encoding part 15 applies DCT processing, quantization processing, encoding processing or the like to a base layer inputted from a frame processing part 13, however, decides a quantization step Q-ba in accordance with a requested bit rate and performs quantization processing according to the decided quantization step Q-ba. The decided quantization step Q-ba is appropriately supplied to an encoding part 16. The encoding part 16 applies DCT processing, quantization processing, encoding processing or the like to an enhancement layer inputted from a frame processing part 14, and however, calculates a quantization step Q-en on the basis of the quantization step Q-ba supplied from the encoding part 15 in performing quantization processing. <P>COPYRIGHT: (C)2003,JPO |
