Patent ID: 6175595
Filing Date: 2001-01-16
Classification: H04N

Abstract:
A method of decoding a bitstream which includes a plurality of multiplexed coded bitstreams corresponding to previously coded signals, said method comprising the steps of:receiving n (n.ltoreq.2) coded bitstreams in a single multiplexed bitstream originating from a transmitting means and/or, a storage means, and demultiplexing to obtain the n individual coded bitstreams;storing only one intra-picture frame of each of the n coded bitstreams in n respective memory buffers which intra picture frame has been coded without reference to other frames in the coded bitstreams;selecting, for display, a single coded bitstream from one of the n memory buffers; anddecoding the selected coded bitstream with a single decoder, using the intra-picture frame stored in the one of the n memory buffers corresponding to the selected coded bitstream.