Patent US1239745A successfully refreshed from Google Patents.
Patent EP0286437A2 successfully refreshed from Google Patents.
EP0286437A2
Expired / Lapsed
EP
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Apparatus and method for recording and reproducing a digital signal
Assignee: Victor Company of Japan Ltd
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Filing: 1988-04-08
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Granted: —
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Expires: 2008-04-08
Abstract
Abstract A digital signal recording and reproducing apparatus for recording an input digital signal on a recording medium to reproduce it therefrom, comprising first means for recording the same identification code as an identification number particular to the digital signal recording and reproducing apparatus when the input digital signal has a specified sampling frequency at the time of recording, and second means for reproducing the recorded identification code at the time of reproduction, thus permitting the digital signal recorded on the recording medium to be reproduced only when the reproduced identification code is coincident with the identification number particular to the apparatus.
Inventors
- 👤 Shiro Yoshida
- 👤 Tatsuro Shirai
- 👤 Satoru Nagashima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 17:26
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/00086; G11B20/00188; G11B20/10; G11B20/10527; G11B27/00; G11B27/02; G11B27/031; G11B27/036; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3063; G06; G06F; G06F2211/00; G06F2211/007; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
An apparatus for recording and reproducing a digital signal, which records an input digital signal on a recording medium to reproduce it therefrom, comprising: first means for recording the same identification code as an identification number particular to said digital signal recording and reproducing apparatus when said input digital signal has a specified sampling frequency at the time of recording; and second means for reproducing said recorded identification code at the time of reproduction, thus permitting the digital signal recorded on said recording medium to be reproduced only when the reproduced identification code is coincident with said discrimination number particular to said digital signal recording and reproducing apparatus.
Claim 2
Independent Claim
108 words
An apparatus for recording and reproducing a digital signal, which records an input digital signal on a recording medium to reproduce it therefrom, comprising: first means for recording the same identification code as an identification number particular to said digital signal recording and reproducing apparatus when said input digital signal has a specified sampling frequency at the time of recording; and second means for reproducing said recorded identification code at the time of reproduction, thus permitting the digital signal recorded on said recording medium to be reproduced only when the reproduced identification code is coincident with said discrimination number particular to said digital signal recording and reproducing apparatus.
Claim 3
Dependent Claim
84 words
An apparatus for recording and reproducing a digital signal as set forth in claim 1, wherein said first means comprises: frequency detection means for detecting that the sampling frequency of said input digital signal is a specified frequency; code formation means for forming the same identification code as said identification number particular to said digital signal recording and reproducing apparatus; and recording means for recording an identification code from said code formation means when an output detected from said frequency detection means is given.
Claim 4
Dependent Claim
93 words
An apparatus for recording and reproducing a digital signal as set forth in claim 1, wherein said second means comprises: code reproducing means for reproducing an identification code from the reproduced digital signal; code formation means for forming the same identification code as said identification number particular to said digital signal and recording apparatus; and coincidence detection means for collating an output detected from said code reproducing means with an identification code from said code formation means, thus to reproduce said digital signal when an output from said coincidence detection means is given.
Claim 5
Independent Claim
117 words
A method for recording and reproducing a digital signal in which an input digital signal is recorded on a recording medium and the recorded signal is reproduced therefrom, characterized in that: when said input digital signal has a specified sampling frequency at the time of recording, the same identification code as an identification number particular to an apparatus for recording and reproducing a digital signal is recorded on said recording medium; and at the time of reproduction, said recorded identification code is reproduced, thus permitting the digital signal recorded on said recording medium to be reproduced only when said reproduced identification code is coincident with said identification number particular to said digital signal recording and reproducing apparatus.
Claim 6
Independent Claim
117 words
A method for recording and reproducing a digital signal in which an input digital signal is recorded on a recording medium and the recorded signal is reproduced therefrom, characterized in that: when said input digital signal has a specified sampling frequency at the time of recording, the same identification code as an identification number particular to an apparatus for recording and reproducing a digital signal is recorded on said recording medium; and at the time of reproduction, said recorded identification code is reproduced, thus permitting the digital signal recorded on said recording medium to be reproduced only when said reproduced identification code is coincident with said identification number particular to said digital signal recording and reproducing apparatus.
References Cited (Backward Citations)
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