| 摘要 |
<p>The invention relates to a system for processing video signals, the system comprising a receiver ( 100 ) arranged to receive video signals, at least one video frame of which comprises at least one area corresponding to a respective one of a plurality of broadcast data sources. The system comprises a processor ( 150 ) arranged to process said video frames to extract at least a part of said area from at least one of said video frames. The frame ( 200 ) of a mosaic video signal may comprise one or more small pictures ( 210 ) and each of them may render a miniature version of a television program. A detection of edges and a detection of lines can be performed for extracting said area ( 210 ) or sub-area ( 240 ) from the frame. The television channel, from which the extracted area or sub-area was received or with which it is associated, can be identified. The user is enabled to specify a representation of the extracted area or sub-area on a display screen.</p> |
