KR890011380A - TV synchronization signal detection control method - Google Patents

TV synchronization signal detection control method Download PDF

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Publication number
KR890011380A
KR890011380A KR870014317A KR870014317A KR890011380A KR 890011380 A KR890011380 A KR 890011380A KR 870014317 A KR870014317 A KR 870014317A KR 870014317 A KR870014317 A KR 870014317A KR 890011380 A KR890011380 A KR 890011380A
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KR
South Korea
Prior art keywords
value
counter
equal
count value
zero
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Application number
KR870014317A
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Korean (ko)
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KR900006264B1 (en
Inventor
최동진
Original Assignee
최근선
주식회사 금성사
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Application filed by 최근선, 주식회사 금성사 filed Critical 최근선
Priority to KR1019870014317A priority Critical patent/KR900006264B1/en
Publication of KR890011380A publication Critical patent/KR890011380A/en
Application granted granted Critical
Publication of KR900006264B1 publication Critical patent/KR900006264B1/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
    • H04N5/05—Synchronising circuits with arrangements for extending range of synchronisation, e.g. by using switching between several time constants
    • 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

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)

Abstract

내용 없음No content

Description

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

Claims (1)

텔레비젼 방송이 선국됨에 따라 마이콤(3)의 카운터(3b)(3g)를 일정값(P)(0)으로 초기값을 설정한 후 동기분리회로(2)에서 출력되는 동기신흐를 마이큼(3)의 카운터(3a)에서 타이머(3c)에 의한 일정시간(Nms)동안 계수하고,그 일정시간(Nms)이 경과되었을 경우에 카운터(3b)의 설정된 카운트값 "P"에서 1을 감산하여 그 카운터(3b)의 카운트값이 제로와 동일한지를 판별하고, 동일하지 않을 경우에는 상기 계수한 동기신호갯수(M)가 설정된 범위(a≤M≤b)에 속할 경우에는 카운터(3g)의 카운트값에 1을 가산하고, 설정된 범위(a≤M≤b)에 속하지 않을 경우와 동일하게 상기 동작을 반복수행하여 상기 카운터(3b)의 카운트값이 제로와 동일한 경우에는 카운터(39)의 카운트된 값이 설정된 값(q)보다 크거나 같을 경우에는 방송신호가 있다고 판정하고, 설정된 값(q)보다 크지도 같지않을 경우에는 방송신호가 있다고 판정하여 방송이 있다고 판정한 경우와 동일하게 카운터(3b)(3g)를 각각 일정값(P)(0)으로 다시 초기설정한 후 상기 동작을 반복수행하여 동기신호를 검출하게 함을 특징으로 하는 텔레비젼 동기신호 검출제어방법.As the television broadcast is tuned, the initial value of the counters 3b and 3g of the microcomputer 3 is set to a constant value P (0), and then the sync signal output from the sync separation circuit 2 is increased (3). The counter 3a counts for a predetermined time Nms by the timer 3c, and when the fixed time Nms elapses, 1 is subtracted from the set count value "P" of the counter 3b. It is determined whether the count value of the counter 3b is equal to zero, and if it is not the same, the count value of the counter 3g when the counted number of synchronization signals M falls within the set range (a? M? B). Is added to 1, and the operation is repeated as in the case of not belonging to the set range (a ≤ M ≤ b), and the counted value of the counter 39 is equal to zero if the count value of the counter 3b is equal to zero. If this value is greater than or equal to the set value q, it is determined that there is a broadcast signal. If it is not the same, it is determined that there is a broadcast signal, and the counters 3b and 3g are initialized again to a constant value P (0) as in the case of determining that there is a broadcast. And a television synchronization signal detection control method. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019870014317A 1987-12-15 1987-12-15 Control method for television synchronizing signal detection KR900006264B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019870014317A KR900006264B1 (en) 1987-12-15 1987-12-15 Control method for television synchronizing signal detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019870014317A KR900006264B1 (en) 1987-12-15 1987-12-15 Control method for television synchronizing signal detection

Publications (2)

Publication Number Publication Date
KR890011380A true KR890011380A (en) 1989-08-14
KR900006264B1 KR900006264B1 (en) 1990-08-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870014317A KR900006264B1 (en) 1987-12-15 1987-12-15 Control method for television synchronizing signal detection

Country Status (1)

Country Link
KR (1) KR900006264B1 (en)

Also Published As

Publication number Publication date
KR900006264B1 (en) 1990-08-27

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