| 摘要 |
<p>PROBLEM TO BE SOLVED: To abolish unnecessary data before it is written into a decoding memory and to realize the fast-forward reproduction of a video without excessively reading/writing data by providing a header detection unit immediately after a stream decomposition unit and writing only necessary data in a data stream into the decoding memory. SOLUTION: The header detection unit 40 is provided immediately after the stream decomposition unit 10. The MPEG video stream outputted from the stream decomposition unit 10 is supplied to the header detection unit 40. The header detection unit 40 selects only the data stream to which a prescribed header is given and it is stored in a prescribed area in the VBV buffer 17-1 of the MPEG decoding memory 17. Thus, the speed of data writing/reading, which is required by the MPEG decoding memory 17, can be reduced since unnecessary data can be abolished before it is written into the MPEG decoding memory 17.</p> |
