Patent ID: 6252907
Filing Date: 2001-06-26
Classification: H04N

Abstract:
A demultiplexer, comprising:a buffer for temporarily storing and outputting a transport, stream, the transport stream consisting of header portion and payload portion, the header portion including a transport header and PES/PSI header;a controller for receiving the transport stress output from the buffer, and being operated according a mode signal applied thereto, to output the header portion and payload portion of the transport stream without any change;a PES/PSI decoder for receiving the transport stream output from the buffer, and being operated according to the mode signal applied thereto, to decode only PES/PSI header and output only payload portion; anda transport header decoder for detecting the transport header from the transport stream went from the buffer, and supplying the mode signal to the controller and PES/PSI decoder according to the content of the detected header, the mode signal being one of a signal for operating only PES/PSI decoder, a signal for operating only controller, and a signal for operating both the PES/PSI decoder and controller.