Patent ID: 8761260
Filing Date: 2014-06-24
Classification: G06F,G06K,H04N

Abstract:
1. A cut detection system comprising: an extractor configured to extract macroblock type information at least for every B frame from video compressed data including the macroblock type information; a calculator configured to calculate a number of intra-coded macroblocks for every frame from the extracted macroblock type information, a number of forward predictive-coded macroblocks for every frame, and a number of backward predictive-coded macroblocks for every frame from the macroblock type information; and a detector configured to detect the B frame or a group of picture including the B frame to be a replay cut portion, which is a head portion or last portion of a replay shot, by using a frequency characteristic of the intra-coded macroblocks included in the B frame as determination conditions, wherein the determination conditions include a condition that the number of intra-coded macroblocks in at least one of two continuous B frames is equal to or larger than a predetermined number, and a condition that the number of forward predictive-coded macroblocks is a maximum frequency and the sum of the number of backward predictive-coded macroblocks and the number of inter-coded macroblocks is smaller than a predetermined number.