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Information signal recording disc recorded with an end signal for selectively preventing unwanted access to predetermined recorded information and disc reproducing apparatus therefor
| Details |
Inventors: Shinyagaito, Tatsuya; Kuramoto, Terumasa; Machida, Toyotaka; Saito, Kikuji; Shichijo, Shunichi; Yamagishi, Tooru; Kobayashi, Yoshinao; Ishii, Kazuyoshi; Hirata, Atsumi;
Assignee: Victor Company of Japan, Ltd. (JP)
Primary Examiner: Richardson; Robert L.
Assistant Examiner:
Attorney, Agent or Firm: Andrus, Sceales, Starke & Sawall
An information signal recording disc comprises a first recorded region in which an information signal at least including a video signal is recorded, and a second recorded region in which an end signal is intermittently recorded. The end signal is used to forcibly and automatically return a reproducing element of a disc reproducing apparatus from a playing position to a rest position. The second recorded region is provided at a position prior to the first recorded region in a direction of a reproducing sequence of the recorded signals on the information signal recording disc. The disc reproducing apparatus comprises a detecting circuit for detecting the reproduced end signal, and a controller. The controller controls the detecting circuit so that the detecting circuit is made substantially inoperative in a state where the disc reproducing apparatus is coupled to an external device having a discriminating function. |
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DETAILED DESCRIPTION Accordingly, it is a general object of the present invention to provide a disc and a disc reproducing apparatus therefor, in which the problems described heretofore are eliminated.
Another and more specific object of the present invention is to provide a disc comprising at least one information signal recorded region in which information signals are recorded, and an end signal recorded region provided prior to the information signal recorded region in the direction of the reproducing sequence of the recorded signals.
An end signal for forcibly and automatically returning a reproducing element of a reproducing apparatus from a playing position to a rest position, is recorded at predetermined positions within the end signal recorded region.
When the disc according to the present invention is played on the disc reproducing apparatus which is not coupled to an external device such as a microcomputer having a discriminating function, the reproducing element of the disc reproducing apparatus will always reproduce the end signal recorded within the end signal recorded region and the reproducing element will be forcibly and automatically returned to the rest position so as to positively prevent the reproduction of the information signals recorded within the information signal recorded region.
Still another object of the present invention is to provide a disc reproducing apparatus comprising a reproducing element for reproducing signals from a disc which comprises the above information signal recorded region and the end signal recorded region, a moving mechanism for moving the reproducing element between the rest position and the playing position, a detecting circuit for detecting the end signal from the signal reproduced by the reproducing element, an interface circuit for at least supplying data within the reproduced signal to the external device and for receiving a control command from the external device, and a controller for controlling the operation of the detecting circuit based on the control command from the interface circuit and for controlling the moving mechansim based on the end signal detected in the detecting circuit
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