| 摘要 |
Apparatus and method for encoding and decoding video signals to facilitate identification of, editing, modifying, queuing, routing, distributing, switching, activating and controlling the video signals. Within a television program distribution system containing a plurality of units through which the television programs flow, the flow of television programs is tracked by operating a first signal processing unit connected within the system for adding signal elements to the video signal of a program in order to add patterns of symbols to the television picture such that the symbols are disposed at predetermined locations of the television picture and a plurality of successive patterns constituting a code uniquely identifying the program, and a second signal processing unit connected within the system for detecting signal elements previously added to a video signal and for producing, in response to such detection, an identification of the program which included the video signal. |
