KR970007853A - System Type Discrimination Method of VCR Using Vertical Synchronization Signal - Google Patents
System Type Discrimination Method of VCR Using Vertical Synchronization Signal Download PDFInfo
- Publication number
- KR970007853A KR970007853A KR1019950021406A KR19950021406A KR970007853A KR 970007853 A KR970007853 A KR 970007853A KR 1019950021406 A KR1019950021406 A KR 1019950021406A KR 19950021406 A KR19950021406 A KR 19950021406A KR 970007853 A KR970007853 A KR 970007853A
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- KR
- South Korea
- Prior art keywords
- vertical synchronization
- synchronization signal
- vcr
- signal
- video signal
- Prior art date
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- Television Signal Processing For Recording (AREA)
- Synchronizing For Television (AREA)
Abstract
본 발명은 VCR 재생시 영상신호의 수직 동기 신호를 이용하여 시스템 방식을 판별하는 방법에 관한 것으로서, VCR의 재생모드에서 복합 영상신호의 수직 동기 신호를 검출하는 과정; 수직 동기 신호의 주기를 계산하는 과정; 및 주기가 16.6msec을 중심으로 한 일정한 범위내에 속하면 NTSC 방식이고, 주기가 20msec을 중심으로 한 일정한 범위내에 속하면 PAL 방식으로 판별하는 과정을 포함함을 특징으로 한다.The present invention relates to a method of determining a system method using a vertical synchronization signal of a video signal during VCR playback, comprising: detecting a vertical synchronization signal of a composite video signal in a playback mode of a VCR; Calculating a period of the vertical synchronization signal; And if the period is within a predetermined range centered on 16.6 msec, the NTSC method. If the period is within a constant range centered on 20 msec, the method includes determining the PAL method.
본 발명에 의하면, 자기 테이프의 재질 불량, 외부의 손상, 노이즈 혼입으로 인한 원신호의 훼손 또는 삭제로 인해 영상신호는 있는데 콘트롤 신호가 비정산적으로 될 경우, 영상신호의 수직 동기 신호를 사용하여 시스템을 판별할 수 있도록 함으로써 시스템 판별시 유발되는 에러를 최소화할 수 있다.According to the present invention, when there is a video signal due to the damage or deletion of the original signal due to material defects of the magnetic tape, external damage, and noise mixing, the system uses a vertical synchronization signal of the video signal when the control signal becomes non-corrected. By making it possible to determine the error, it is possible to minimize the error caused when determining the system.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.
제3도는 본 발명의 일실시예를 설명한 흐름도, 제4도는 업/다운 카운터를 이용한 수직동기 신호 검출 방법을 도시한 도면.FIG. 3 is a flowchart illustrating an embodiment of the present invention, and FIG. 4 is a diagram illustrating a vertical synchronization signal detection method using an up / down counter.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1019950021406A KR970007853A (en) | 1995-07-20 | 1995-07-20 | System Type Discrimination Method of VCR Using Vertical Synchronization Signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1019950021406A KR970007853A (en) | 1995-07-20 | 1995-07-20 | System Type Discrimination Method of VCR Using Vertical Synchronization Signal |
Publications (1)
Publication Number | Publication Date |
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KR970007853A true KR970007853A (en) | 1997-02-21 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1019950021406A KR970007853A (en) | 1995-07-20 | 1995-07-20 | System Type Discrimination Method of VCR Using Vertical Synchronization Signal |
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KR (1) | KR970007853A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230146324A (en) | 2022-04-12 | 2023-10-19 | 정혜경 | Multifunctional Flower Pot With Mobile Phone Holder Function |
-
1995
- 1995-07-20 KR KR1019950021406A patent/KR970007853A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20230146324A (en) | 2022-04-12 | 2023-10-19 | 정혜경 | Multifunctional Flower Pot With Mobile Phone Holder Function |
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