| 摘要 |
A program material screening device is provided whereby the owner/operator of a program material playback device such as a videocassette player, television, laser disc player, motion picture projector, phonograph or the like may automatically and selectively prevent the reproduction into humanly perceivable form of unwanted program material. The screening device is capable of recognizing non-interfering material content signals stored along with the program signals that are reproduced by the program material playback device, and is capable of automatically disabling the playback device in response to the recognition of the material content signal.
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