KR950022941A - Anti-recording signal detection system - Google Patents
Anti-recording signal detection system Download PDFInfo
- Publication number
- KR950022941A KR950022941A KR1019930027805A KR930027805A KR950022941A KR 950022941 A KR950022941 A KR 950022941A KR 1019930027805 A KR1019930027805 A KR 1019930027805A KR 930027805 A KR930027805 A KR 930027805A KR 950022941 A KR950022941 A KR 950022941A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- recording
- pulse
- gate
- recording signal
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/20—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/08—Separation of synchronising signals from picture signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
본 발명은 녹화방지신호 시스템에 관한 것으로, 특히, 녹화방지신호를 검출하여 녹화가 금지된 비디오테이프의 무단복사를 방지하는 회로에서 수직동기신호에서 부터 일정시간의 펄스를 발생시켜 이를 카운트함으로써 출력된 캐리출력을 사용하여 녹화방지신호를 검출하는 것이다. 즉, 입력된 영상신호가 클램핑되고 수직동기신호가 추출되어 녹화방지신호 게이트펄스가 생성되고 2진카운터 및 피크검출부를 통해 녹화방지신호가 있을때 하이로 출력하고 녹화방지신호가 없을때 로우로 출력하여 검출된 출력을 기록계가 제어하여 녹화방지신호를 검출해 내는 시스템이다.The present invention relates to an anti-recording signal system. In particular, a circuit for detecting an anti-recording signal and preventing unauthorized copying of a video tape for which recording is prohibited is generated by generating a predetermined time pulse from a vertical synchronization signal and counting the pulse. The carry output is used to detect an anti-recording signal. In other words, the input video signal is clamped and the vertical synchronization signal is extracted to generate a video protection signal gate pulse and output high when there is a video protection signal through the binary counter and peak detector, and low when there is no video protection signal. The recorder controls the detected output to detect the video protection signal.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제1도는 본 발명의 시스템 구성도,1 is a system configuration diagram of the present invention,
제4도는 제1도에 대한 시스템의 파형도,4 is a waveform diagram of the system relative to FIG.
제5도는 제2도에 대한 시스템의 파형도.5 is a waveform diagram of a system relative to FIG.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930027805A KR960015508B1 (en) | 1993-12-15 | 1993-12-15 | A system for detecting recording prevention signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930027805A KR960015508B1 (en) | 1993-12-15 | 1993-12-15 | A system for detecting recording prevention signal |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950022941A true KR950022941A (en) | 1995-07-28 |
KR960015508B1 KR960015508B1 (en) | 1996-11-14 |
Family
ID=19371043
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930027805A KR960015508B1 (en) | 1993-12-15 | 1993-12-15 | A system for detecting recording prevention signal |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR960015508B1 (en) |
-
1993
- 1993-12-15 KR KR1019930027805A patent/KR960015508B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
KR960015508B1 (en) | 1996-11-14 |
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