H.264/MPEG-2 transcoding based on personal video recorder platform

In this paper, a scheme of applying H.264/MPEG-2 program transcoding on personal video recorder (PVR), home gateway or multimedia server is proposed, which enables PVR to play the H.264 programs. A transcoding architecture which reuses the motion vectors in the source H.264 stream is further presented. Experimental results show that this architecture is more efficient than a cascaded pixel domain transcoder while provides fairly good video quality. To our knowledge, there is no known research on H.264/MPEG-2 video transcoding or its application on consumer electronics.