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KR950016399A - Channel search method and apparatus for multi-system - Google Patents

Channel search method and apparatus for multi-system Download PDF

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Publication number
KR950016399A
KR950016399A KR1019930024616A KR930024616A KR950016399A KR 950016399 A KR950016399 A KR 950016399A KR 1019930024616 A KR1019930024616 A KR 1019930024616A KR 930024616 A KR930024616 A KR 930024616A KR 950016399 A KR950016399 A KR 950016399A
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South Korea
Prior art keywords
signal
tuning
channel
intermediate frequency
frequency signal
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KR1019930024616A
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Korean (ko)
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KR0170263B1 (en
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양예목
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김광호
삼성전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Television Receiver Circuits (AREA)

Abstract

본 발명인 멀티시스템을 위한 채널써치방법 및 장치는 채널의 대역폭이 다른 방송방식을 수용할 수 있는 멀티시스템에서 채널을 써치할 때, 채널의 대역폭에 따라 트랩을 온/오프시켜 줌으로써 정튜닝을 진행하는 동안 SYNC 신호가 음성신호에 묻혀서 발생하는 채널스킵현상 및 맴돌이 현상을 개선할 수 있다.The channel search method and apparatus for a multi-system of the present invention performs forward tuning by turning on / off a trap according to the bandwidth of a channel when the channel is searched in a multi-system capable of accommodating a broadcasting method having a different channel bandwidth. While the SYNC signal is buried in the voice signal, the channel skip phenomenon and the eddy phenomenon can be improved.

Description

멀티시스템을 위한 채널써치방법 및 장치Channel search method and apparatus for multi-system

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

제1도는 종래 기술의 동작을 설명하기 위한 흐름도이다.1 is a flowchart illustrating the operation of the prior art.

제2도는 본 발명인 채널써치방법을 설명하기 위한 흐름도이다.2 is a flowchart for explaining a channel search method according to the present invention.

제3도는 본 발명인 채널써치장치에 따른 제1실시예의 개략적인 구성블럭도이다.3 is a schematic block diagram of the first embodiment according to the channel search apparatus of the present invention.

Claims (4)

서로 다른 칼라 텔레비젼의 표준방식에서 모두 사용 가능한 멀티시스템의 채널써치방법에 있어서, 튜닝 초기에 트랩을 오프시켜서 입력 시스템에 무관하게 대역폭 전체가 입력되도록 하는 과정; SYNC 신호를 감지할 때까지 튜닝전압을 지정된 스텝으로 증가시키는 과정; SYNC 신호를 감지하고 나면 채널의 대역폭이 6MHz 인지 8MHz 인지를 판단하는 과정; 상기 채널의 대역폭 판단의 결과 6MHz 채널방식 시스템으로 판단이 되면 트랩을 온시켜서 입력신호의 대역을 제한하여 SYNC 신호에 음성중간주파수신호가 중첩되지 않도록 하여 다음 스텝에서 정튜닝을 실행하는 동안 SYNC 신호가 없어지지 않도록 하는 과정; 및 상기 SYNC 신호감지과정보다 좀 더 작은 스텝으로 바꾸고 자동주파수조정에 의해서 정튜닝을 진행시키는 과정을 포함함을 특징으로 하는 멀티시스템을 위한 채널써치방법.1. A multi-system channel search method that can be used in all standard color television systems, the method comprising: turning off a trap at the beginning of tuning so that the entire bandwidth is input regardless of the input system; Increasing the tuning voltage to the designated step until detecting the SYNC signal; After detecting the SYNC signal, determining whether the bandwidth of the channel is 6 MHz or 8 MHz; If it is determined that the bandwidth of the channel is determined by the 6MHz channel system, the trap is turned on to limit the bandwidth of the input signal so that the SYNC signal does not overlap the voice intermediate frequency signal. To prevent it from disappearing; And converting the step into a smaller step than the SYNC signal detection process, and performing forward tuning by automatic frequency adjustment. 서로 다른 칼라 텔레비젼의 표준방식에서 모두 사용 가능한 멀티시스템의 채널써치장치에 있어서, 안테나로부터의 고주파 신호를 입력으로 하여 튜닝전압에 따라 채널을 선국하여 중간주파수 신호로 변환하여 출력하는 튜우너; 상기 중간주파수 신호중 필요한 대역만 통과시키는 톱니파 필터; 상기 중간주파수 신호를 기저대역신호로 변환하여 출력하고 정튜닝에 필요한 자동주파수조정신호를 출력하는 비디오 디텍터; 상기 기저대역신호로부터 SYNC 신호의 유무를 판별하는 SYNC 디텍터; 상기 기저대역신호로부터 수직동기주파수를 카운트하는 수직동기 주파수 카운터; 상기 기저대역신호로부터 영상정보를 제공하는 칼라디코더; 소정의 제1제어신호에 응답하여 상기 톱니파 필터로부터의 중간주파수 신호의 대역을 제한하는 트랩회로; 상기 영상정보로부터 채널에 관련된 각종 데이타를 저장하기 위한 메모리; 및 상기 튜닝전압을 가변하고, 방송방식에 따라 상기 제1제어신호를 출력하고, 상기 자동주파수조정 신호에 맞추어 정튜닝을 수행 한 후 튜닝에 관련된 각종 데이타를 상기 칼라 디코더로부터 입력받아 상기 메모리에 저장할 수 있도록 하는 튜우닝 마이컴을 구비한 것을 특징으로 하는 멀티시스템을 위한 채널써치장치.1. A multi-system channel search apparatus that can be used in all standard color television systems, comprising: a tuner for inputting a high frequency signal from an antenna, selecting a channel according to a tuning voltage, and converting the channel into an intermediate frequency signal; A sawtooth filter for passing only a required band of the intermediate frequency signal; A video detector which converts the intermediate frequency signal into a baseband signal and outputs the signal, and outputs an automatic frequency adjustment signal required for forward tuning; A SYNC detector for determining the presence or absence of a SYNC signal from the baseband signal; A vertical synchronous frequency counter for counting vertical synchronous frequencies from the baseband signal; A color decoder for providing image information from the baseband signal; A trap circuit for limiting a band of the intermediate frequency signal from the sawtooth filter in response to a first predetermined control signal; A memory for storing various data related to a channel from the image information; And varying the tuning voltage, outputting the first control signal according to a broadcasting scheme, performing forward tuning according to the automatic frequency adjustment signal, and receiving various data related to tuning from the color decoder and storing the tuning data in the memory. Channel search apparatus for a multi-system characterized in that it comprises a tuning microcomputer to enable. 서로 다른 칼라 텔레비젼의 표준방식에서 모두 사용 가능한 멀티시스템의 채널써치장치에 있어서, 안테나로부터의 고주파 신호를 입력으로 하여 튜닝전압에 따라 채널을 선국하여 중간주파수 신호로 변환하여 출력함은 물론 소정의 제2제어신호에 응답하여 방송방식에 따라 채널의 대역폭에 맞는 중간주파수 신호를 출력하는 튜우너; 상기 중간주파수 신호중 필요한 대역만 통과시키는 톱니파 필터; 상기 중간주파수 신호를 기저대역신호로 변환하여 출력하고 정튜닝에 필요한 자동주파수조정 신호를 출력하는 비디오 디텍터; 상기 기저대역신호로부터 SYNC 신호의 유무를 판별하는 SYNC 디텍터; 상기 기저대역신호로부터 수직동기주파수를 카운트하는 수직동기주파수 카운터; 상기 기저대역신호로부터 영상정보를 제공하는 칼라디코더; 상기 영상정보로부터 채널에 관련된 각종 데이타를 저장하기 위한 메모리; 및 상기 튜닝전압을 가변하고, 방송방식에 따라 상기 제1제어신호를 출력하고, 상기 자동주파수조정 신호에 맞추어 정튜닝을 수행한 후 튜닝에 관련된 각종 데이타를 상기 칼라 디코더로부터 입력받아 상기 메모리에 저장할 수 있도록 하는 튜우닝 마이컴을 구비한 것을 특징으로 하는 멀티시스템을 위한 채널써치장치.In a multi-system channel search apparatus that can be used in different color television standard systems, a high frequency signal from an antenna is input, and a channel is tuned according to a tuning voltage to be converted into an intermediate frequency signal and output as well as a predetermined system. A tuner for outputting an intermediate frequency signal corresponding to a bandwidth of a channel according to a broadcasting method in response to a control signal; A sawtooth filter for passing only a required band of the intermediate frequency signal; A video detector which converts the intermediate frequency signal into a baseband signal and outputs the signal, and outputs an automatic frequency adjustment signal required for forward tuning; A SYNC detector for determining the presence or absence of a SYNC signal from the baseband signal; A vertical synchronous frequency counter for counting a vertical synchronous frequency from the baseband signal; A color decoder for providing image information from the baseband signal; A memory for storing various data related to a channel from the image information; And varying the tuning voltage, outputting the first control signal according to a broadcasting scheme, performing forward tuning in accordance with the automatic frequency adjustment signal, and receiving various data related to tuning from the color decoder and storing the tuning data in the memory. Channel search apparatus for a multi-system characterized in that it comprises a tuning microcomputer to enable. 서로 다른 칼라 텔레비젼의 표준방식에서 모두 사용 가능한 멀티시스템의 채널써치장치에 있어서, 안테나로부터의 고주파 신호를 입력으로 하여 튜닝전압에 따라 채널을 선국하여 중간주파수 신호로 변환하여 출력하는 튜우너; 상기 중간주파수 신호중 필요한 대역만 통과시키는 톱니파 필터; 상기 중간주파수 신호를 기저대역신호로 변환하여 출력하고 채널의 대역폭이 6MHz 인지 8MHz 인지를 판별하여 소정의 제3제어신호를 출력함은 물론 정튜닝에 필요한 자동주파수조정 신호를 출력하는 비디오 디텍터; 상기 제3제어신호에 응답하여 톱니파 필터로부터의 중간주파수 신호의 대역을 제한하는 트랩회로; SYNC 신호의 유무를 판별하고 영상신호를 증폭하여 영상정보를 제공하는 영상증폭부; 상기 영상정보로부터 채널에 관련된 각종 데이타를 저장하기 위한 메모리; 및 상기 튜닝전압을 가변하고, 상기 자동주파수조정 신호에 맞추어 정튜닝을 수행 한 후 튜닝에 관련된 각종 데이타를 상기 영상증폭부로부터 입력받아 상기 메모리에 저장할 수 있도록 하는 튜우닝 마이컴을 구비한 것을 특징으로 하는 멀티시스템을 위한 채널써치장치.1. A multi-system channel search apparatus that can be used in all standard color television systems, comprising: a tuner for inputting a high frequency signal from an antenna, selecting a channel according to a tuning voltage, and converting the channel into an intermediate frequency signal; A sawtooth filter for passing only a required band of the intermediate frequency signal; A video detector for converting the intermediate frequency signal into a baseband signal and outputting the baseband signal, determining whether the bandwidth of the channel is 6 MHz or 8 MHz, outputting a predetermined third control signal, and outputting an automatic frequency adjustment signal required for forward tuning; A trap circuit for limiting a band of the intermediate frequency signal from the sawtooth filter in response to the third control signal; An image amplifier for determining the presence or absence of a SYNC signal and amplifying the image signal to provide image information; A memory for storing various data related to a channel from the image information; And a tuning micom for varying the tuning voltage, performing tuning according to the automatic frequency adjustment signal, and receiving various data related to tuning from the image amplifier and storing the tuning data in the memory. Channel search device for multiple systems. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930024616A 1993-11-18 1993-11-18 Channel search method and device for multi-broadcasting system KR0170263B1 (en)

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KR1019930024616A KR0170263B1 (en) 1993-11-18 1993-11-18 Channel search method and device for multi-broadcasting system

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Application Number Priority Date Filing Date Title
KR1019930024616A KR0170263B1 (en) 1993-11-18 1993-11-18 Channel search method and device for multi-broadcasting system

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KR950016399A true KR950016399A (en) 1995-06-17
KR0170263B1 KR0170263B1 (en) 1999-03-20

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KR100680506B1 (en) * 2004-12-22 2007-02-08 엘지전자 주식회사 Tuning Control Method of Television Broadcast Signal

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