JPS647371A - Recorder - Google Patents
RecorderInfo
- 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
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.
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)
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)
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 |
-
1987
- 1987-06-30 JP JP16090887A patent/JPS647371A/en active Pending
Patent Citations (1)
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)
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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