Information signal recording disc recorded with an end signal for selectively preventing unwanted access to predetermined recorded information and disc reproducing apparatus therefor
First Claim
1. An information signal recording disc playable on a disc reproducing apparatus which comprises a reproducing element for reproducing recorded signals from track turns of the information signal recording disc, said reproducing element reproducing the recorded signals from the track turns of the information signal recording disc in a playing position and stopping the reproduction in a rest position, said information signal recording disc comprising:
- a first region comprising track turns recorded with an information signal at least including a video signal;
a second region comprising track turns intermittently recorded with an end signal, said end signal being used to forcibly and automatically return the reproducing element of the disc reproducing apparatus from the playing position to the rest position, said second region being provided at a position prior to said first region in a direction of a reproducing sequence of the recorded signals on the information signal recording disc; and
a third region made up of at least one track turn, said third region being provided at a position subsequent to a position where the recording of the information signal terminates in the direction of the reproducing sequence of the recorded signals on the information signal recording disc,said track turns being recorded with an address signal with a constant period, said address signal indicating the position on the information signal recording disc,said end signal being recorded in place of said address signal in predetermined track turns within said second region,said end signal being recorded in place of said address signal in all track turns within said third region.
1 Assignment
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Accused Products
Abstract
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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Citations
11 Claims
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1. An information signal recording disc playable on a disc reproducing apparatus which comprises a reproducing element for reproducing recorded signals from track turns of the information signal recording disc, said reproducing element reproducing the recorded signals from the track turns of the information signal recording disc in a playing position and stopping the reproduction in a rest position, said information signal recording disc comprising:
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a first region comprising track turns recorded with an information signal at least including a video signal; a second region comprising track turns intermittently recorded with an end signal, said end signal being used to forcibly and automatically return the reproducing element of the disc reproducing apparatus from the playing position to the rest position, said second region being provided at a position prior to said first region in a direction of a reproducing sequence of the recorded signals on the information signal recording disc; and a third region made up of at least one track turn, said third region being provided at a position subsequent to a position where the recording of the information signal terminates in the direction of the reproducing sequence of the recorded signals on the information signal recording disc, said track turns being recorded with an address signal with a constant period, said address signal indicating the position on the information signal recording disc, said end signal being recorded in place of said address signal in predetermined track turns within said second region, said end signal being recorded in place of said address signal in all track turns within said third region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A disc reproducing apparatus for playing an information signal recording disc, said information signal recording disc comprising a first region having track turns recorded with an information signal at least including a video signal, a second region having track turns intermittently recorded with an end signal, and a third region having at least one track turn, said second region being provided at a position prior to said first region in a direction of a reproducing sequence of the recorded signals on the information signal recording disc, said third region being provided at a position subsequent to a position where the recording of the information signal terminates in the direction of the reproducing sequence of the recorded signals on the information signal recording disc, said track turns being recorded with an address signal with a constant period, said address signal indicating the position on the information signal recording disc, said end signal being recorded in place of said address signal in predetermined track turns within said second region, said end signal being recorded in place of said address signal in all track turns within said third region, said information signal recording disc being recorded with data related to the existing range of said second region on said information signal recording disc and data related to positions on said information signal recording disc where said end signal is recorded, said disc reproducing apparatus comprising:
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a reproducing element for reproducing the recorded signals from said information signal recording disc; moving means for moving said reproducing element between a rest position and a playing position; detecting means for detecting said end signal from the reproduced signal from said reproducing element; interface means for transmitting information between said disc reproducing apparatus and an external device which can be coupled to said disc reproducing apparatus, said external device having a discriminating function, said interface means supplying to said external device at least said data within the reproduced signal and receiving a control command from said external device when said external device is coupled to said disc reproducing apparatus; and controller means responsive to the control command from said interface means for controlling operations of said moving means and said detecting means, said controller means controlling the operation of said moving means responsive to the end signal detected in said detecting means, said controller means making said detecting means operative when said external device is not coupled to said disc reproducing apparatus, so that said moving means is controlled to return said reproducing element from the playing position to the rest position when said detecting means detects the end signal, said controller means making said detecting means substantially inoperative responsive to said control command when said external device is coupled to said disc reproducing apparatus, so that said reproducing element can scan through said second recording region and reach said first recording region. - View Dependent Claims (10, 11)
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Specification