| 摘要 |
PCT No. PCT/GB82/00352 Sec. 371 Date Aug. 9, 1983 Sec. 102(e) Date Aug. 9, 1983 PCT Filed Dec. 15, 1982 PCT Pub. No. WO83/02208 PCT Pub. Date Jun. 23, 1983.In order to enable the editing of television programs in the home to exclude undesired sound or visual events (such as swearing or scenes of violence), these events are identified by coding inserted in the television signal prior to mass distribution. Preferably this coding is used to identify a range of possibly undesirable events, the coding including a grading of the events in terms of their undesirability. In the home, the coding is extruded from the received television signal by a suitable decoder. This coding is compared with a preset code identifying the grade or grades of event to be excluded; on the basis of this comparison the television signal is doctored before output on a television set. To facilitate following of the program being edited, only that portion of the television signal (sound or vision) carrying the undesired event is doctored. |
