KR950022840A - Character display device for no signal input of video signal processing system - Google Patents
Character display device for no signal input of video signal processing system Download PDFInfo
- Publication number
- KR950022840A KR950022840A KR1019930031087A KR930031087A KR950022840A KR 950022840 A KR950022840 A KR 950022840A KR 1019930031087 A KR1019930031087 A KR 1019930031087A KR 930031087 A KR930031087 A KR 930031087A KR 950022840 A KR950022840 A KR 950022840A
- Authority
- KR
- South Korea
- Prior art keywords
- signal
- synchronous
- synchronization
- video
- vertical
- 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
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Studio Circuits (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
본 발명은 영상신호 처리 시스템에 있어서 무신호 입력시 문자표시가 가능한 장치에 관한 것으로, VTR의 기록 또는 재생모드에 따라 VTR 영상신호 또는 증폭기(2700)로 부터의 영상신호를 선택하는 제6스위칭부(2800)와, 수직동기신호 수평동기신호 및 복합동기신호를 발생하는 동기신호 발생부(1600)와, 제6스위칭부(2800)로 부터의 신호를 수직동기신호 및 수평동기신호로 분리하여 출력하는 동기분리부(1300)와, 제6스위칭부(2800)로 부터의 신호를 인가받아 신호 유무를 검출하는 신호검출부(1800)와, 동기신호 발생기(1600)로 부터의 복합 동기신호를 인버터하여 레벨을 감쇄시키는 레벨감쇄기(2300)와, 제2신호처리계(2200)로 부터의 신호 또는 레벨 감쇄기(2300)로 부터의 신호를 선택하는 제5스위칭부(2200)와, 동기 분리부(1300)로 부터의 수직동기 신호 또는 동기신호 발생부(1600)로 부터의 수직 동기신호를 선택하는 제3스위칭부(1400)와, 동기분리부(1300)로 부터의 수평동기신호 또는 동기신호 발생부(1600)로 부터의 수평동기신호를 선택하는 제4스위칭부(1500)와, 문자 신호 및 문자 블랭킹신호를 발생하는 문자생성기(1100)와, 영상처리 시스템을 제어하는 시스템 제어부(1200)을 더 구비함으로서 무신호 입력시 문자를 표시할 수 있다.The present invention relates to a device capable of displaying a character when no signal is input in a video signal processing system. The sixth switching unit selects a VTR video signal or a video signal from the amplifier 2700 according to a recording or reproducing mode of a VTR. 2800, the synchronous signal generation unit 1600 for generating the vertical synchronous signal horizontal synchronous signal and the composite synchronous signal, and the signal from the sixth switching unit 2800 into a vertical synchronous signal and a horizontal synchronous signal for output Inverting the composite synchronization signal from the synchronous separation unit 1300, the signal detection unit 1800 to detect the presence of a signal by receiving a signal from the sixth switching unit 2800 and the synchronous signal generator 1600 A level attenuator 2300 for attenuating the level, a fifth switching unit 2200 for selecting a signal from the second signal processing system 2200 or a signal from the level attenuator 2300, and a synchronous separation unit 1300 Vertical sync signal or sync signal from A third switching unit 1400 for selecting a vertical synchronization signal from the generation unit 1600 and a horizontal synchronization signal from the synchronization separation unit 1300 or a horizontal synchronization signal from the synchronization signal generation unit 1600; And a fourth switching unit 1500 for selecting, a character generator 1100 for generating a text signal and a text blanking signal, and a system control unit 1200 for controlling the image processing system to display text when no signal is input. Can be.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제 1 도는 본 발명에 따른 영상신호처리 시스템의 구성도.1 is a block diagram of a video signal processing system according to the present invention.
제 2 도는 영상신호처리 시스템에서 정상적인 영상신호 또는 무신호입력시 문자믹스를 도시한 도면.2 is a diagram illustrating a character mix when a normal video signal or no signal is input in a video signal processing system.
제 3 도는 무신호 입력시 문자신호의 믹스를 도시한 도면.3 is a diagram showing a mix of text signals when no signal is input.
제 4 도는 유사수직 동기신호의 믹스를 도시한 도면.4 shows a mix of pseudo-vertical synchronization signals.
제 5 도는 입력제어 신호모드에 따라 신호를 선택하는 각각의 스위칭부의 진리표.5 is a truth table of each switching unit for selecting a signal according to an input control signal mode.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930031087A KR960006531B1 (en) | 1993-12-29 | 1993-12-29 | Character display apparatus of image signal treating system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019930031087A KR960006531B1 (en) | 1993-12-29 | 1993-12-29 | Character display apparatus of image signal treating system |
Publications (2)
Publication Number | Publication Date |
---|---|
KR950022840A true KR950022840A (en) | 1995-07-28 |
KR960006531B1 KR960006531B1 (en) | 1996-05-17 |
Family
ID=19374096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019930031087A KR960006531B1 (en) | 1993-12-29 | 1993-12-29 | Character display apparatus of image signal treating system |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR960006531B1 (en) |
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1993
- 1993-12-29 KR KR1019930031087A patent/KR960006531B1/en not_active IP Right Cessation
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Publication number | Publication date |
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KR960006531B1 (en) | 1996-05-17 |
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