Video encoding apparatus that adjusts code amount by skipping encoding of image data

摘要

A comparing/judging unit 125 of a video encoding apparatus compares, prior to encoding each image data, the predictive amount of codes accumulated in a receiver buffer of a decoding apparatus with a threshold that is set for a picture type of a picture to be obtained by encoding the image data. The comparing/judging unit 125 judges, when the predictive amount in the receiver buffer is below the threshold, that encoding the image data is to be skipped, and makes the DCT unit 113 cancel the encoding process. The comparing/judging unit 125 then outputs an all-skip picture in which all macroblocks except a first macroblock and a last macroblock in each slice layer are skipped macroblocks from a SKIP picture storage memory 126.