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EP0224929A2
Expired / Lapsed
EP
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Apparatus and method for preventing unauthorized dubbing of a recording signal
Assignee: Sony Corp
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Filing: 1986-12-04
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Granted: —
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Expires: 2006-12-04
Abstract
Abstract In a reproducing and recording or dubbing system there are provided a reproducing apparatus(1) for reproducing from a first tape recorded composite data which includes pulse code modulated information data mixed with control data having first and second states for indicating that re-recording of the associated information data is to be prevented and permitted, respectively, a recording apparatus (2) for recording on a second tape composite data reproduced from the first tape, a detector for detecting the states of the control data in the composite data reproduced from the first tape, a generator (5) for generating a dubbing protect control signal in response to detection of the first state of the control data, a line (7) for transmitting the reproduced composite data from the reproducing apparatus to the recording apparatus, and a switch (SW) interposed in the line for transmitting the reproduced composite data and being operated by the dubbing protect control signal to interrupt the transmission of the reproduced composite data to the recording apparatus (2) and thereby prevent recording or copying of the reproduced composite data on the second tape.
Inventors
- 👤 Kenji C/O Sony Corporation Nakano
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 15:33
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/02; G11B5/09; G11B20/00; G11B20/00086; G11B20/00681; G11B20/00688; G11B20/10; G11B20/10527; G11B5/86; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/913; H04N2005/91307; H04N2005/91321
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
172 words
In a reproducing an recording system, the combination of: a reproducing apparatus (1) for reproducing from a first tape recorded composite data which included pulse code modulated information data mixed with control data having first and second states for indicating that re-recording of the associated information data is to be prevented and permitted, respectively; a recording apparatus (2) for recording on a second tape composite data reproduced from said first tape; detecting means (26) for detecting said states of said control data in said composite data reproduced from said first tape; means(5; 24) for generating a dubbing protect control signal in response to detection of said first state of said control data; means(7) for transmitting said reproduced composite data from said reproducing apparatus to said recording apparatus; and switching means (SW) interposed in said means for transmitting and being operated by said dubbing protect control signal to interrupt the transmission of said reproduced composite data to said recording apparatus and thereby prevent recording of said reproduced composite data on said second tape.
Claim 2
Dependent Claim
172 words
In a reproducing an recording system, the combination of: a reproducing apparatus (1) for reproducing from a first tape recorded composite data which included pulse code modulated information data mixed with control data having first and second states for indicating that re-recording of the associated information data is to be prevented and permitted, respectively; a recording apparatus (2) for recording on a second tape composite data reproduced from said first tape; detecting means (26) for detecting said states of said control data in said composite data reproduced from said first tape; means(5; 24) for generating a dubbing protect control signal in response to detection of said first state of said control data; means(7) for transmitting said reproduced composite data from said reproducing apparatus to said recording apparatus; and switching means (SW) interposed in said means for transmitting and being operated by said dubbing protect control signal to interrupt the transmission of said reproduced composite data to said recording apparatus and thereby prevent recording of said reproduced composite data on said second tape.
Claim 3
Dependent Claim
49 words
The reproducing and recording system according to claim 1; in which said detecting means (26) and said means(24)for generating the dubbing protect control signal are provided in said reproducing apparatus (1), and said switching means is provided at the end of said means for transmitting in said recording apparatus.
Claim 4
Dependent Claim
32 words
The reproducing and recording system according to claim 2; further comprising second means for transmitting said dubbing protect control signal from said reproducing apparatus to said switching means in said recording apparatus.
Claim 5
Dependent Claim
33 words
The reproducing and recording system according to claim 1; in which said detecting means, said means for generating the dubbing protect control signal and said switching means are provided in said recording apparatus.
Claim 6
Dependent Claim
60 words
The reproducing and recording system according to claim 1; in which said means for generating said dubbing protect control signal includes counting means (27) for countimg the number of times said control data is detected to be in said first state thereof, and means providing said dubbing protect control signal only when said counting means counts to a predetermined value.
Claim 7
Independent Claim
95 words
A method of preventing the use of a reproducing apparatus combined with a recording apparatus for unauthorized dubbing of a recorded information signal which comprises: recording dubbing protection control data with said information signal to provide a recorded composite signal; reproducing the recorded composite signal in said reproducing apparatus; detecting the presence of said dubbing protection control data in the reproduced composite signal; and intercepting transmission of the reproduced composite signal from said reproducing apparatus to said recording apparatus in response to the detection of said dubbing protection control data in the reproduced composite signal.
Claim 8
Independent Claim
95 words
A method of preventing the use of a reproducing apparatus combined with a recording apparatus for unauthorized dubbing of a recorded information signal which comprises: recording dubbing protection control data with said information signal to provide a recorded composite signal; reproducing the recorded composite signal in said reproducing apparatus; detecting the presence of said dubbing protection control data in the reproduced composite signal; and intercepting transmission of the reproduced composite signal from said reproducing apparatus to said recording apparatus in response to the detection of said dubbing protection control data in the reproduced composite signal.
References Cited (Backward Citations)
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