KR970007853A - System Type Discrimination Method of VCR Using Vertical Synchronization Signal - Google Patents

System Type Discrimination Method of VCR Using Vertical Synchronization Signal Download PDF

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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
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Application number
KR1019950021406A
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Korean (ko)
Inventor
김명호
Original Assignee
김광호
삼성전자 주식회사
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Publication date
Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019950021406A priority Critical patent/KR970007853A/en
Publication of KR970007853A publication Critical patent/KR970007853A/en

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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

수직동기 신호를 이용한 브이씨알(VCR)의 시스템 방식 판별 방법System Type Discrimination Method of VCR Using Vertical Synchronization Signal

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)

VCR 재생시 수직 동기 신호를 이용한 시스템 방식 판별 방법에 있어서, VCR의 재생모드에서 복합 영상신호의 수직 동기 신호를 검출하는 제1과정; 상기 제1과정에서 검출된 수직 동기 신호의 주기를 계산하는 제2과정; 및 상기 제2과정에서 주기가 16.6msec을 중심으로 한 일정한 범위내에 속하면 NTSC 방식이고, 주기가 20msec을 중심으로 한 일정한 범위내에 속하면 PAL 방식으로 판별하는 제3과정을 포함함을 특징으로 하는 VCR 재생시 수직 동기 신호를 이용한 시스템 방식 판별 방법.A system type determination method using a vertical synchronization signal during VCR playback, comprising: a first step of detecting a vertical synchronization signal of a composite video signal in a playback mode of a VCR; A second step of calculating a period of the vertical synchronization signal detected in the first step; And a third step of determining if the period falls within a predetermined range centered on 16.6 msec in the second process and the PAL method if the period falls within a predetermined range centered on 20 msec. System type identification method using vertical sync signal during VCR playback. 제1항에 있어서, 상기 제1과정은 VCR의 마이콤으로 받아들인 복합 영상신호를 인버트시켜서, 복합 영상 신호를 마이콤의 업/다운 카운터를 이용하여 카운트하여, 카운트양이 미리 정해진 일정한 값의 수직 동기 신호 검출 레벨까지 카운트되면 수직 동기 신호가 입력된 것으로 판단하는 과정으로 이루어짐을 특징으로 하는 VCR재생시 수직 동기 신호를 이용한 시스템 방식 판별 방법.The method according to claim 1, wherein the first process inverts the composite video signal received by the microcomputer of the VCR, counts the composite video signal using an up / down counter of the microcomputer, and counts vertically at a predetermined value. And a method for determining a vertical synchronization signal is input when the signal is detected up to a signal detection level. 제1항에 있어서, 제1과정 및 제2과정은 보다 정확한 판단을 위해 상기 제1과정 및 제2과정을 일정 횟수 반복하여 매 계산된 값이 속하는 범위가 동일할 때, 시스템 방식을 판단함을 특징으로 하는 VCR 재생시 수직 동기 신호를 이용한 시스템 방식 판별 방법.The method of claim 1, wherein the first process and the second process repeat the first process and the second process a predetermined number of times for a more accurate determination, and determine the system method when the calculated values belong to the same range. A system type determination method using a vertical synchronization signal during VCR playback. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950021406A 1995-07-20 1995-07-20 System Type Discrimination Method of VCR Using Vertical Synchronization Signal KR970007853A (en)

Priority Applications (1)

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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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KR1019950021406A KR970007853A (en) 1995-07-20 1995-07-20 System Type Discrimination Method of VCR Using Vertical Synchronization Signal

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KR970007853A true KR970007853A (en) 1997-02-21

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Cited By (1)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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