| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To realize encoding of high compressibility for a natural moving picture corresponding to lossless compression or near lossless compression. <P>SOLUTION: With regard to a picture element at the same position in each frame, an index 1 is obtained by an index preparation means 73 on the basis of the result of comparison of a differential value and a threshold value at a luminance level between adjacent frames. In an encoding means 74, the encoding result of the immediate frame is diverted as the luminance level of the picture element or is newly encoded. Furthermore, by preparing indices 2 and 3 low in the amount of data from the index 1 and making them alternative data to the index 1, the amount of data of the whole index is reduced. <P>COPYRIGHT: (C)2004,JPO</p> |
