JPS647371A - Recorder - Google Patents

Recorder

Info

Publication number
JPS647371A
JPS647371A JP16090887A JP16090887A JPS647371A JP S647371 A JPS647371 A JP S647371A JP 16090887 A JP16090887 A JP 16090887A JP 16090887 A JP16090887 A JP 16090887A JP S647371 A JPS647371 A JP S647371A
Authority
JP
Japan
Prior art keywords
signal
recording
circuit
identification signal
detected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16090887A
Other languages
Japanese (ja)
Inventor
Kenjiro Endo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP16090887A priority Critical patent/JPS647371A/en
Priority to DE3850530T priority patent/DE3850530T2/en
Priority to EP88106689A priority patent/EP0297242B1/en
Priority to US07/187,041 priority patent/US4924328A/en
Publication of JPS647371A publication Critical patent/JPS647371A/en
Priority to US07/434,791 priority patent/US5003410A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To forbid copying under certain restrictions by recording additionally a prescribed index signal when an information source is recorded and forbidding the recording of a recording signal when this index signal is detected at the time of copying. CONSTITUTION:An input signal including a restriction flag is supplied from an input terminal 11 to a detection and decision circuit 12 and a combiner 13. The circuit 12 detects the restriction flag out of the input signal, and when the restriction flag is 0 (restricted), the input signal is added with an identification signal in the combiner 13. Then, a signal for recording, which is accompanied by the identification signal is led to an output terminal 15 and recorded onto a recording medium by a recording circuit. In case of the input signal which has already been accompanied by the identification signal in the above- stated method, this matter is detected by an identification signal detecting circuit 21 and then given to a sound recording forbidding circuit 22. The circuit 22 forbids the sound recording when the identification signal is detected by the circuit 21. By this method, further copying from a copied tape can thus be prevented.
JP16090887A 1987-06-30 1987-06-30 Recorder Pending JPS647371A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP16090887A JPS647371A (en) 1987-06-30 1987-06-30 Recorder
DE3850530T DE3850530T2 (en) 1987-06-30 1988-04-26 Recording / playback system and method with recording restriction function.
EP88106689A EP0297242B1 (en) 1987-06-30 1988-04-26 Recording/reproducing system and method with record restriction function
US07/187,041 US4924328A (en) 1987-06-30 1988-04-27 System for recording/reproducing an information source having an apparatus-specific identification signal
US07/434,791 US5003410A (en) 1987-06-30 1989-11-13 System for recording/reproducing an information source having an apparatus specific identification signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16090887A JPS647371A (en) 1987-06-30 1987-06-30 Recorder

Publications (1)

Publication Number Publication Date
JPS647371A true JPS647371A (en) 1989-01-11

Family

ID=15724931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16090887A Pending JPS647371A (en) 1987-06-30 1987-06-30 Recorder

Country Status (1)

Country Link
JP (1) JPS647371A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01273204A (en) * 1988-04-26 1989-11-01 Matsushita Electric Ind Co Ltd Digital signal recording and reproducing device
JP2002246993A (en) * 2001-02-14 2002-08-30 Sony Corp Information processing equipment and method therefor, recording medium, and program thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106218A (en) * 1978-02-07 1979-08-21 Matsushita Electric Ind Co Ltd Pcm signal dubbing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54106218A (en) * 1978-02-07 1979-08-21 Matsushita Electric Ind Co Ltd Pcm signal dubbing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01273204A (en) * 1988-04-26 1989-11-01 Matsushita Electric Ind Co Ltd Digital signal recording and reproducing device
JP2002246993A (en) * 2001-02-14 2002-08-30 Sony Corp Information processing equipment and method therefor, recording medium, and program thereof

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