VIDEO COMPRESSION USING A SIGNAL TRANSMISSION CHAIN COMPRISING AN INFORMATION BUS LINKING ENCODERS AND DECODERS

摘要

An MPEG-2 or other compressed video stream (CP) can be manipulated as separa te information bus (IB) and coefficient (CP*) streams. The information bus stream (IB) contains motion vector information but also information derived from a previous decoding operation (14, 18) for use in a subsequent coding operation (22). Processing in the coefficient domain enables bit rate conversion without decoding to the pixel level and also simplifies the combination of MPEG layers.