Ammu

Satyaghosh Ammu, Hampshire GB

Patent application number	Description	Published
20110080525	DETECTING REPETITION IN DIGITAL VIDEO - There is provided a method of detecting repeated pictures in a sequence of video picture data, each picture of said video picture data comprising a plurality of macroblocks, the method comprising performing hierarchical motion estimation on the video picture data to provide best motion vectors for each macroblock, best motion vector sum of absolute difference values for each macro block and zero motion vector sum of absolute difference values for each macroblock, wherein the hierarchical motion estimation includes a plurality of levels, and said best motion vectors, best motion vector sum of absolute difference values and zero motion vector sum of absolute difference values for each macroblock are provided for at least a top level, providing a noise threshold value based upon the zero motion vector sum of absolute difference values from the top level of the hierarchical motion estimation, accumulating the best motion vector sum of absolute difference values for macroblocks having best motion vector sum of absolute difference values greater than the noise threshold value to provide a distortion value for the picture, and setting a repeat flag dependent upon the distortion value. An apparatus adapted to carry out the method, and a computer readable medium carrying instructions which, when executed by a computer, cause the computer to carry out the method are also provided.	04-07-2011

Patent application number	Description	Published
20110069757	CONTENT ADAPTIVE VIDEO ENCODER AND CODING METHOD - A method of pre-processing a sequence of video picture data comprising I pictures, P pictures and B pictures, where the pictures are arranged as a plurality of Group Of Pictures (GOP) and each of the Group Of Pictures has a first picture and a plurality of Sub Group of Pictures (Sub-GOP). The method uses an analysis of the sequence of video picture data to determine a position of a scene change relative to a position of a start of a new GOP within the sequence of video picture data and then moves the start of the new GOP to coincide with the scene change by extending or decreasing a current GOP length according to whether the scene change and the start of a new GOP are within a predetermined number of pictures of each other. An apparatus for carrying out the method is also provided.	03-24-2011

Patent application number	Description	Published
20100239019	POST PROCESSING OF MOTION VECTORS USING SAD FOR LOW BIT RATE VIDEO COMPRESSION - A method and system for detecting and replacing spurious motion vectors in video signal compression includes determining whether a motion vector of a current macroblock is spurious by comparing the motion vector with motion vectors of motion vectors of neighbouring macroblocks; and replacing the motion vector as spurious if the difference exceeds a predetermined threshold. In particular, the method and system seeks to determine (	09-23-2010