Patent ID: 6434195
Filing Date: 2002-08-13
Classification: H04N

Abstract:
A method for replacing compressed video from a first source with compressed video from a second source in a video data stream, comprising the steps of:determining if the video from said second source is progressively refreshed video, and if so: (a) decompressing the video from said second source sufficiently prior to the replacement of the first source video to enable the recovery of a first replacement video frame from said second source before replacement commences; (b) recompressing the recovered first replacement video frame as an intra-coded (I) frame; and (c) commencing the replacement of the first source video with the second source video using said I frame; wherein said first replacement video frame is recovered from said second source by assembling non-motion compensated slices from each of a plurality of progressively refreshed frames, until a full non-motion compensated frame is provided for recompression as said intra-coded (I) frame.