| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a compressed video stream switching device capable of switching a digital compressed video stream without distorting any decoded image when switching is requested. SOLUTION: When a break position in a video frame of input 1 is detected from data from a TS/PES parser 1 by a controller 7 on the assumption that a request to switch the input 1 to into 2 is generated, the read of data from a switch buffer 3 is stopped. Next, a selector 8 is switched to the side of a TS converter 6, the video frame of input 2 in specified encoding mode (such as I picture, for example,) is detected by the data from a TS/PES parser 2 and reading is started from the head of this video frame. Thus, since both data before and after switching become complete on the side of decoding, normal decoding is enabled at the time of switching and the decoded image of high quality can be provided.</p> |
