Patent ID: 6728271
Filing Date: 2004-04-27
Classification: H04H,H04J,Y02D

Abstract:
A stream demultiplexing device for demultiplexing a plurality of elementary streams from a transport stream in which the plurality of elementary streams are time-division multiplexed, the transport stream including a plurality of transport packets that each contain a payload carrying a data portion taken from one of the plurality of elementary streams, the stream demultiplexing device comprising:a storing unit having a plurality of storage areas each for storing a different one of the plurality of elementary streams; a signal generating unit for generating a synchronous clock signal; a payload processing unit for obtaining, after the stream demultiplexing device starts receiving a present transport packet, a payload of the present transport packet and transferring a data portion in the obtained payload to a storage area in the storing unit that corresponds to an elementary stream from which the data portion was taken, in accordance with the synchronous clock signal supplied from the signal generating unit; and a first clock supply controlling unit for stopping the supply of the synchronous clock signal to the payload processing unit when the payload processing unit finishes transferring the data portion, and resuming the supply a predetermined time period after the stream demultiplexing device starts receiving a transport packet that follows the present transport packet.