Scene change detecting device
August 21, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesAccurate detection of a drastic change between successive pictures Scene change detection system and method Interframe-coded output data amount control system Scene change detector for detecting a scene change of a moving picture Method for masking transmission errors of MPEG compressed pictures Moving picture scene detection system Method for detecting a scene change and image editing apparatus Patent #: 5493345 InventorsAssigneeApplicationNo. 697250 filed on 08/21/1996US Classes:348/700, Motion dependent key signal generation or scene change detection348/699, Motion vector generation348/701, Specified processing of frame or field difference signal (e.g., noise reduction, key signal spreading)375/240.15, Bidirectional386/4EditingExaminersPrimary: Chin, Tommy P.Assistant: Diep, Nhon Attorney, Agent or FirmForeign Patent References
International ClassH04N 007/32Foreign Application Priority Data1996-03-21 JPAbstractA scene change detecting device of a relatively small circuit scale is capable of accurately detecting a scene change using data which have already been compressed and coded. The scene change detecting device has an extracting circuit for extracting frame type information, frame identification information, and block type information from a coded signal of a moving picture which has been processed by block-adaptive interframe predictive coding. The block type information is sent to a counter, and the frame type information and the frame identification information are sent to a frame estimating circuit. Based on the block type information, the counter counts macroblocks with respect to each of the types of predictive processes over one frame. The frame estimating circuit estimates a frame immediately following a scene change based on the counted number of macroblocks with respect to each of the types of predictive processes, the frame type information, and the frame identification information. | |
