| 摘要 |
<p>Disclosed is an apparatus for demultiplexing multiplexed data. This apparatus comprises a demultiplexer for receiving a multiplexed packet stream in which a plurality of object data are multiplexed, and demultiplexing the multiplexed data with reference to packet identification numbers added to the respective packets; a decoder for decoding M pieces of object data separated from the multiplexed data, and outputting M pieces of decoded object data; a memory for storing N pieces of information relating to a program and separated by the demultiplexer; a memory for storing object composition information separated by the demultiplexer; a memory for storing information relating to the object data and separated by the demultiplexer; a compositor for compositing the M pieces of decoded object data; and an information analyzer for analyzing the packet identification numbers from the N pieces of information relating to the program, the object composition information, or the information relating to the object data. Therefore, when a multiplexed packet stream in which MPEG4 data are multiplexed by MPEG2 is demultiplexed, the MPEG4 data can be separated and decoded with high reliablity. <IMAGE></p> |
