Patent ID: 6324214
Filing Date: 2001-11-27
Classification: H04N

Abstract:
An apparatus for encoding source video data representative of a plurality of images, said apparatus comprising:computing means for determining a target code amount by using a ratio of difficulty data of a respective picture to a sum of difficulty data of a predetermined plurality of pictures within said source video data; andmeans for encoding at least a portion of the source video data in accordance with said target code amount,said computing means determines the target code amount such that the target code amount for an (i)th picture is determined by using the ratio of difficulty data of a (j)th picture to the sum of difficulty data of the predetermined plurality of pictures from the (j)th picture, the target code amount for an (i+1)th picture is determined by using the ratio of difficulty data of a (j+1)th picture to the sum of difficulty data of the predetermined plurality of pictures from the (j+1)th picture, the target code amount for an (i+2)th picture is determined by using the ratio of difficulty data of a (j+2)th picture to the sum of difficulty data of the predetermined plurality of pictures from the (j+2)th picture, and so forth.