KR970009194A - Sync signal detection method - Google Patents

Sync signal detection method Download PDF

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Publication number
KR970009194A
KR970009194A KR1019950022878A KR19950022878A KR970009194A KR 970009194 A KR970009194 A KR 970009194A KR 1019950022878 A KR1019950022878 A KR 1019950022878A KR 19950022878 A KR19950022878 A KR 19950022878A KR 970009194 A KR970009194 A KR 970009194A
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KR
South Korea
Prior art keywords
pulses
synchronization signal
minimum
signal
maximum
Prior art date
Application number
KR1019950022878A
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Korean (ko)
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KR0153976B1 (en
Inventor
임중환
Original Assignee
배순훈
대우전자 주식회사
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Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950022878A priority Critical patent/KR0153976B1/en
Publication of KR970009194A publication Critical patent/KR970009194A/en
Application granted granted Critical
Publication of KR0153976B1 publication Critical patent/KR0153976B1/en

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    • 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
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Synchronizing For Television (AREA)

Abstract

본 발명은 영상 신호에서 소정 주기를 갖는 동기 신호의 유무를 검출하는 동기 신호 검출 방법에 관한 것으로서, 이를 위하여, 영상 신호에서 분리되어 입력되는 수평 동기 신호의 펄스 수를 소정 시간 동안 카운트하는 제1단계와 ; 소정 시간동안 카운트된 펄스 수가 동기 신호임을 의미하여 기설정된 최대 펄스 수와 최소 펄스 수 사이에 있는지를 판단하는 제2단계와 ; 카운트된 펄스 수가 상기 최대 펄스 수와 최소 펄스 수 사이에 있으면 동기 신호가 검출된 것으로 판단하는 제3단계를 포함하는 동기 신호 검출 방법을 제공함으로써, 동기 신호가 갖는 주기의 특성을 이용하여 동기 신호 펄스를 카운트하여 동기 신호의 유무 검출을 할 수 있고, 또한 동기 신호로 인식하기 위한 한계 범위인 최소 및 최대 펄스 수를 용이하게 임의로 설정 변경할 수 있으므로 영상 신호의 감도 조정이 가능한 잇점이 있는 것이다.The present invention relates to a synchronization signal detection method for detecting the presence or absence of a synchronization signal having a predetermined period in an image signal. To this end, a first step of counting the number of pulses of a horizontal synchronization signal separated from an image signal for a predetermined time period Wow ; A second step of determining whether the number of pulses counted for a predetermined time is a synchronization signal and determining whether the number of pulses is between a preset maximum number of pulses and a minimum number of pulses; And a third step of determining that the synchronization signal has been detected if the number of pulses counted is between the maximum and minimum pulses, thereby providing a synchronization signal pulse using characteristics of the period of the synchronization signal. It is possible to detect the presence or absence of a synchronous signal by counting, and to easily and arbitrarily set and change the minimum and maximum number of pulses, which is a limit range for recognizing a synchronous signal, to adjust the sensitivity of an image signal.

Description

동기 신호 검출 방법Sync signal detection method

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 따른 동기 신호 검출을 위한 하드웨어 블럭도, 제2도는 본 발명의 바람직한 실시예에 따른 동기 신호 검출 과정을 도시한 흐름도.1 is a hardware block diagram for synchronizing signal detection according to the present invention, and FIG. 2 is a flowchart illustrating a synchronizing signal detecting process according to a preferred embodiment of the present invention.

Claims (2)

영상 신호에서 소정 주기를 갖는 동기 신호의 유무를 검출하는 방법으로서, 영상 신호에서 분리되어 입력되는 수평 동기 신호의 펄스 수를 소정 시간 동안 카운트하는 제1단계와 ; 소정 시간 동안 카운트된 펄스 수가 동기 신호임을 의미하여 기설정된 최대 펄스 수와 최소 펄스 수 사이에 있는지를 판단하는 제2단계와 ; 카운트된 펄스 수가 상기최대 펄스 수와 최소 펄스 수 사이에 있으면 동기 신호가 검출된 것으로 판단하는 제3단계를 포함하는 동기 신호 검출 방법.CLAIMS 1. A method for detecting the presence or absence of a synchronization signal having a predetermined period in a video signal, comprising: a first step of counting the number of pulses of a horizontal synchronization signal input separately from the video signal for a predetermined time; A second step of determining whether the number of pulses counted for a predetermined time is a synchronization signal and determining whether the number of pulses is between a preset maximum number of pulses and a minimum number of pulses; And determining that a synchronization signal has been detected if the number of pulses counted is between the maximum and minimum pulses. 제1항에 있어서, 상기 제3단계는, 카운트된 펄스 수가 상기 최대 펄스 수와 최소 펄스 수 사이에 있으면 판단 카운터를 카운트 업하고 최대와 최소 펄스 수를 벗어나면 상기 판단 카운터를 카운트 다운하여 상기 판단 카운터가소정 값 이상일 경우에 동기 신호가 검출된 것으로 판단하는 것을 특징으로 하는 동기 신호 검출 방법.2. The method of claim 1, wherein the third step comprises: counting up the determination counter when the counted pulse number is between the maximum and minimum pulse number, and counting down the determination counter when the count is out of the maximum and minimum pulse number. And determining that the synchronization signal has been detected when the counter is above a predetermined value. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950022878A 1995-07-28 1995-07-28 Method for detecting horizontal synchronizing signal KR0153976B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950022878A KR0153976B1 (en) 1995-07-28 1995-07-28 Method for detecting horizontal synchronizing signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950022878A KR0153976B1 (en) 1995-07-28 1995-07-28 Method for detecting horizontal synchronizing signal

Publications (2)

Publication Number Publication Date
KR970009194A true KR970009194A (en) 1997-02-24
KR0153976B1 KR0153976B1 (en) 1998-11-16

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Application Number Title Priority Date Filing Date
KR1019950022878A KR0153976B1 (en) 1995-07-28 1995-07-28 Method for detecting horizontal synchronizing signal

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100278356B1 (en) * 1998-04-11 2001-02-01 윤종용 Video signal starting point detection circuit of flat panel display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100278356B1 (en) * 1998-04-11 2001-02-01 윤종용 Video signal starting point detection circuit of flat panel display device

Also Published As

Publication number Publication date
KR0153976B1 (en) 1998-11-16

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