| 摘要 |
PURPOSE:To enable only a program for which its recording is desired to be recorded by transmitting a signal noise with a specified frequency at every start and every end of a CM in a television program or the like and controlling the start and end of the recording in a recorder. CONSTITUTION:A signal noise with a frequency not more than 20Hz that is the minimum for a human's audition is transmitted together with a pictorial image and a topic just before or just after a CM or at every topic in a program from a broadcasting station. On the other hand, using the timetable of a program on a newspaper, weekly musical journal or the like, every program and every topic in the program are numbered and the number is adapted to correspond to the signal noise. When a program with a given number is to be recorded by a video deck, after appointing a date and a channel, the number entered on the side of the timetable is inputted. Thus, only the signal noise corresponding to the number of the appointed program is responded, whereby only the program for which its recording is desired can be recorded.
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