Patent ID: 8421928
Filing Date: 2013-04-16
Classification: H04N

Abstract:
1. A system for scene change detection, comprising: a decoder to decode input digital video data into video data compressed by a single codec or uncompressed video data in a codec-independent format; a normalizer to normalize the video data decoded by the decoder in a temporally and spatially uniform format; and a scene change detector to compute a mode ratio for each frame of the normalized video data through a mode determination, and to determine, when a frame has a mode ratio higher than a preset threshold value, that a scene change has occurred at the frame, wherein the scene change detector comprises: an optimum mode determiner to determine an optimum mode by computing a cost function for all modes of normalized frames outputted from the normalizer and to find a mode having a minimum value of the cost function values; a mode ratio calculator to calculate a mode ratio based on the determined optimum mode for scene change detection; an error corrector to correct the calculated mode ratio in consideration of errors possibly causing false scene change detection in a current frame in which the mode ratio is calculated; and a scene change determiner to determine whether a scene change has occurred at the current frame on the basis of the corrected mode ratio.