KR900011274A - NTSC Channel Tuning Method for All Broadcasting Areas - Google Patents

NTSC Channel Tuning Method for All Broadcasting Areas Download PDF

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Publication number
KR900011274A
KR900011274A KR1019880017812A KR880017812A KR900011274A KR 900011274 A KR900011274 A KR 900011274A KR 1019880017812 A KR1019880017812 A KR 1019880017812A KR 880017812 A KR880017812 A KR 880017812A KR 900011274 A KR900011274 A KR 900011274A
Authority
KR
South Korea
Prior art keywords
channel
time
pll data
microcomputer
longer
Prior art date
Application number
KR1019880017812A
Other languages
Korean (ko)
Other versions
KR920000887B1 (en
Inventor
나일구
Original Assignee
안시환
삼성전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 안시환, 삼성전자 주식회사 filed Critical 안시환
Priority to KR1019880017812A priority Critical patent/KR920000887B1/en
Priority to JP1258627A priority patent/JPH0656943B2/en
Priority to GB8924724A priority patent/GB2226722B/en
Publication of KR900011274A publication Critical patent/KR900011274A/en
Priority to US07/598,759 priority patent/US5245437A/en
Application granted granted Critical
Publication of KR920000887B1 publication Critical patent/KR920000887B1/en

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Classifications

    • 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
    • H04N5/50—Tuning indicators; Automatic tuning control

Abstract

내용 없음No content

Description

NTSC의 전방송지역 대응의 채널선국방법NTSC Channel Tuning Method for All Broadcasting Areas

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제1도는 본 발명에 따른 회로도.1 is a circuit diagram according to the present invention.

Claims (1)

마이컴(10)와 튜너(20)와 변조부(30)와 동기신호검출부(40)와 AFT 서어치수단을 구비한 NTSC 방송방식을 갖는 채널의 선국회로에 있어서, 상기 마이컴(10)에서 채널 업/다운키로 채널을 선국하여 채널 5A인가를 판단한 후 5A이면 5A의 IRC에 해당하는 PLL 데이터를 전송하면서 5A가 아니면 일반적인 프로세스를 수행하는 제1과정과, 상기 제1과정 수행후 동기검출신호가 있는지를 판단하여 있으면 일반 프로세스를 수행하고 없으면 설정시간(X)보다 AFT 서어치하기까지의 시간이 긴지의 여부를 판단하여 길지 않으면 시간을 일정 스텝으로 증가하여 PLL 데이터를 변화한 후 다시 1인지를 판단하는 제2과정과, 상기 제2과정에서 설정시간(X)보다 AFT 서어치하기까지의 시간이 길면 채널 5A를 HRC에 해당하는 PLL 데이터를 전송하여 제2과정과 같은 방법으로 수행하는 제3과정과, 상기 제3과정에서 설정시간(Y)보다 AFT 서어치 하기까지의 시간이 길면 채널 업/다운 키가 채널이(01)이냐를 마이컴(10)에서 판단하여 (01)채널이면 일반 프로세스를 수행하고 (01)채널이 아니면 PLL데이터가 5채널에 해당하는 것을 전송하고 일반프로세스를 수행하는 제4과정으로 이루어짐을 특징으로 하는 NTSC의 전방송지역 대응의 채널선국회로.In the channel tuning circuit of the NTSC broadcasting system having a microcomputer 10, a tuner 20, a modulator 30, a synchronization signal detector 40, and an AFT search means, a channel up from the microcomputer 10 is performed. After determining whether the channel is 5A by selecting a channel with the / down key, if 5A, PLL data corresponding to IRC of 5A is transmitted, and if there is a first process performing a general process other than 5A, and whether there is a synchronization detection signal after performing the first process If it is determined that the normal process is not performed, it is determined whether the time to AFT search is longer than the set time (X) .If not, if it is not long, the time is increased by a certain step to determine whether it is 1 again after changing the PLL data. A second process for transmitting the PLL data corresponding to the HRC and performing channel 5A in the same manner as the second process when the time from the second process to the AFT search is longer than the set time (X). If the time until the AFT search is longer than the set time (Y) in the third process, the microcomputer 10 determines whether the channel up / down key is a channel (01) and performs a general process if the channel is (01). And (01) a channel tuning circuit for NTSC's all-broadcasting area, characterized in that it comprises a fourth process of transmitting a PLL data corresponding to five channels and performing a general process if it is not a channel. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880017812A 1988-12-29 1988-12-29 Channel selecting circuit KR920000887B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019880017812A KR920000887B1 (en) 1988-12-29 1988-12-29 Channel selecting circuit
JP1258627A JPH0656943B2 (en) 1988-12-29 1989-10-03 Channel selection method for all broadcasting regions of NTSC
GB8924724A GB2226722B (en) 1988-12-29 1989-11-02 Selecting channels in video systems
US07/598,759 US5245437A (en) 1988-12-29 1990-10-15 Method for selecting channels in a video system using a national television system committee (NTSC) system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019880017812A KR920000887B1 (en) 1988-12-29 1988-12-29 Channel selecting circuit

Publications (2)

Publication Number Publication Date
KR900011274A true KR900011274A (en) 1990-07-11
KR920000887B1 KR920000887B1 (en) 1992-01-30

Family

ID=19280847

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880017812A KR920000887B1 (en) 1988-12-29 1988-12-29 Channel selecting circuit

Country Status (3)

Country Link
JP (1) JPH0656943B2 (en)
KR (1) KR920000887B1 (en)
GB (1) GB2226722B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950001574B1 (en) * 1992-02-29 1995-02-25 삼성전자주식회사 Hrc mode receiving time reduction method of catv

Also Published As

Publication number Publication date
GB8924724D0 (en) 1989-12-20
KR920000887B1 (en) 1992-01-30
JPH02195715A (en) 1990-08-02
GB2226722B (en) 1993-08-04
JPH0656943B2 (en) 1994-07-27
GB2226722A (en) 1990-07-04

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