Efficient and effective wipe detection in MPEG compressed video based on the macroblock information
We propose an effective and efficient wipe detection method based on the macroblock information of the MPEG compressed video. Two types of wipe transitions are taken into consideration. By analyzing the prediction directions of B frames, which are revealed in the MB types, the scene change region of each frame can be found. Once the accumulation of the scene change regions covers most area of the frame, the sequence will be considered a wipe transition sequence. Besides, uncommon intra-coded MBs of the B frame can also be applied as an indicator of the wipe transition. A very simple analysis based on small amount of MB type information is sufficient to achieve wipe detection directly on MPEG compressed video.