KR950026218A - Broadcasting method automatic selection method and device - Google Patents

Broadcasting method automatic selection method and device Download PDF

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Publication number
KR950026218A
KR950026218A KR1019940002541A KR19940002541A KR950026218A KR 950026218 A KR950026218 A KR 950026218A KR 1019940002541 A KR1019940002541 A KR 1019940002541A KR 19940002541 A KR19940002541 A KR 19940002541A KR 950026218 A KR950026218 A KR 950026218A
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South Korea
Prior art keywords
frequency
broadcast
deviation
aft
broadcasting
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KR1019940002541A
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Korean (ko)
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KR0126797B1 (en
Inventor
심순선
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김광호
삼성전자 주식회사
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Priority to KR1019940002541A priority Critical patent/KR0126797B1/en
Publication of KR950026218A publication Critical patent/KR950026218A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/46Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04HBROADCAST COMMUNICATION
    • H04H20/00Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65Arrangements characterised by transmission systems for broadcast
    • H04H20/76Wired systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455Demodulation-circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50Tuning indicators; Automatic tuning control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/12Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal

Abstract

본 발명은 방송수신기의 방송방식 자동선택 방법 및 장치에 관한 것으로서, 하나의 채널을 선국하여 AFT를 수행해서 수신되는 비디오신호가 있으면 제1방송방식의 주파수와 AFT된 주파수의 편차를 계산하고 계산된 편차가 제1 및 제2방송식의 주파수편차에 근접되면 제2방송방식을 선택하는 단계; 수신되는 비디오신호가 있고 제1방송방식의 주파수와 AFT된 주파수의 편차를 계산하고 계산된 편차가 제1 및 제3방송방식의 주파수편차에 근접되면 제3방송방식을 선택하는 단계 ; 및 수신되는 비디오신호가 있고 제1방송방식의 주파수와 AFT된 주파수가 근접되면 제1방송방식을 선택하는 단계를 구비한다.The present invention relates to a method and apparatus for automatically selecting a broadcast method of a broadcast receiver. If there is a video signal received by performing an AFT by selecting one channel, a deviation between the frequency of the first broadcast method and the AFT frequency is calculated and calculated. Selecting a second broadcast method when the deviation is close to the frequency deviation of the first and second broadcast equations; Calculating a deviation between the frequency of the first broadcast method and the AFT frequency and selecting the third broadcast method when the calculated deviation approaches the frequency deviation of the first and third broadcast methods; And selecting the first broadcast method when the received video signal is present and the frequency of the first broadcast method and the AFT frequency are close to each other.

따라서, 본 발명은 유선방송방식에 관계없이 수신되는 방송방식에 맞게 자동적으로 모드가 설정됨으로써 사용하기 편하게 튜닝시간이 빨라지며 수신불량의 염려가 없다.Therefore, the present invention is automatically tuned to the received broadcast method regardless of the cable broadcasting method, the tuning time is easy to use and there is no fear of poor reception.

Description

방송방식 자동선택방법 및 장치Broadcasting method automatic selection method and device

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

제1도는 본 발명에 의한 방송수신기의 블럭도,1 is a block diagram of a broadcast receiver according to the present invention;

제2도는 본 발명에 의한 방송방식 자동선택방법을 설명하기 위한 바람직한 일실시예의 흐름도.2 is a flow chart of a preferred embodiment for explaining the broadcast method automatic selection method according to the present invention.

Claims (5)

유선 텔레비젼방송을 수신하는 방송수신기의 방송방식 자동선택방법에 있어서, 초기 채널을 선국하고 AFT를 수행하여 수신되는 비디오신호의 유무를 체크하는 단계 ; 수신되는 비디오신호가 있으면 AFT된 주파수가 제1방송방식의 주파수보다 제1주파수편차이상으로 낮은가를 적어도 1회 이상 채널을 변경하면서 체크해서 적어도 1회이상 체크되면 제2방송방식모드를 설정하는 단계 ; 상기 AFT된 주파수가 제1방송방식의 주파수보다 제1주파수편차 이상으로 낮지 않고 특정 채널에서 AFT된 주파수가 제1주파수편차 이상으로 낮지 않고 특정 채널에서 AFT된 주파수가 제1방송방식의 주파수보다 제2주파수편차이상으로 높은가를 적어도 1회 이상 특정채널을 변경하면서 체크해서 적어도 1회이상 체크되면 제3방송식을 설정하는 단계 ; 및 상기 AFT된 주파수가 제1방송식의 주파수보다 제1주파수보다 제1주파수편차 이상으로 낮지 않고 특정 채널에서 AFT된 주파수가 제1방송방식의 주파수보다 제2주파수편차이상으로 높지 않은가를 적어도 1회 이상 채널을 변경하면서 체크해서 적어도 1회이상 체크되면 제1방송방식을 설정하는 단계를 구비하는 것을 특징으로 하는 방송방식 자동선택방법.CLAIMS 1. A method of automatically selecting a broadcast method of a broadcast receiver for receiving cable television broadcasting, the method comprising: selecting an initial channel and performing an AFT to check whether there is a video signal received; If there is a video signal received, checking whether the AFT frequency is lower than the frequency of the first broadcasting method by more than the first frequency deviation by changing the channel at least once, and setting the second broadcasting mode when at least one time is checked; The AFT frequency is not lower than the frequency of the first broadcasting scheme by more than the first frequency deviation, and the AFT frequency is not lower than the frequency of the first broadcasting scheme by more than the first frequency deviation. Checking at least one change of a specific channel at least once higher than at least two frequency deviations, and setting a third broadcast type if at least one check is performed; At least one of whether the AFT frequency is not lower than the first frequency by more than the first frequency deviation by more than the first frequency and the AFT frequency in a specific channel is not higher than the frequency of the first broadcast by more than the second frequency deviation by at least one; And checking the channel by changing the channel more than once and setting the first broadcast method when the channel is checked at least once. 제1항에 있어서, 상기 제1방송방식은 표준텔레비젼 방송방식이고, 상기 제2방송방식은 상기 제1방송방식의 주파수에 비해 전 채널에서 1.2MHz 낮은 주파수를 가지는 HRC 방식이며, 상기 제3방송방식은 5 및 6채널에서 상기 제1방송방식에 비해 2MHz 높은 주파수를 가진 IRC 방식인 것을 특징으로 하는 방송방식 자동선택방법.The method of claim 1, wherein the first broadcast method is a standard television broadcast method, and the second broadcast method is an HRC method having a frequency lower than 1.2 MHz in all channels compared to the frequency of the first broadcast method, and the third broadcast method. Method is an IRC method characterized in that the IRC method having a frequency of 2MHz higher than the first broadcast method in 5 and 6 channels. 제1항에 있어서, 상기 초기 채널은 2채널인 것을 특징으로 하는 방송방식 자동선택방법.The method of claim 1, wherein the initial channel is two channels. 하나의 채널을 선국하여 AFT를 수행해서 수신되는 비디오신호가 있으면 제1방송방식의 주파수와 AFT된 주파수의 편차를 계산하고 계산된 편차가 제1 및 제2방송방식의 주파수편차에 근접되면 제2방송방식을 선택하는 단계 ; 수신되는 비디오신호가 있고 제1방송방식의 주파수와 AFT된 주파수의 편차를 계산하고 계산된 편차가 제1 및 제3방송방식의 주파수편차에 근접되면 제3방송방식을 선택하는 단계 ; 및 수신되는 비디오신호가 있고 제1방송방식의 주파수와 AFT된 주파수가 근접되면 제1방송방식을 선택하는 단계를 구비하는 것을 특징으로 하는 방송방식 자동선택방법.If there is a video signal received by performing AFT by tuning one channel, a deviation between the frequency of the first broadcasting method and the AFT frequency is calculated, and if the calculated deviation is close to the frequency deviation of the first and second broadcasting methods, the second signal is calculated. Selecting a broadcasting method; Calculating a deviation between the frequency of the first broadcast method and the AFT frequency and selecting the third broadcast method when the calculated deviation approaches the frequency deviation of the first and third broadcast methods; And selecting a first broadcast method when there is a video signal received and the frequency of the first broadcast method and the AFT frequency are close to each other. 유선 텔레비젼방송을 수신하는 방송수신장치에 있어서, 텔레비젼방송신호를 수신하고 입력되는 튜닝전압에 따라 수신되는 상기 텔레비젼신호 중 선국된 채널의 영상중간주파수신호를 출력하고 선국된 채널에 대응하는 국부발진주파수신호를 발생하는 튜너회로부 ; 상기 영상중간주파수신호를 입력하여 영상신호를 복조하고 AFT 신호를 발생하는 복조회로부 ; 상기 국부발진주파수와 입력데이타에 대응하는 주파수와의 편차를 감소하는 방향으로 상기 튜닝전압을 가변시켜서 출력하는 PLL회로부 ; 및 초기 채널데이타로부터 채널데이타를 순차적으로 증가하여 상기 PLL 회로부에 출력하고 이 채널데이타에 의해 선국된 채널이 AFT 신호의 입력에 응답하여 AFT 신호에 대응하는 AFT된 주파수와 제1방송방식의 주파수변차를 구하고 이 주파수편차가 제1 및 제2방송방식의 주파수편차에 가까우면 제2방송방식을 선택하고 제1 및 제3방송방식의 주파수편차에 가까우면 제3방송방식을 선택하고 제로에 가까우면 제1방송방식을 선택하는 방송방식 자동선택회로부를 구비한 것을 특징으로 하는 방송수신장치.A broadcast receiving apparatus for receiving cable television broadcasting, comprising: receiving a television broadcasting signal and outputting an image intermediate frequency signal of a channel selected among the television signals received according to an input tuning voltage, and a local oscillation frequency corresponding to the channel selected; A tuner circuit section for generating a signal; A demodulation circuit unit for demodulating the video signal by inputting the video intermediate frequency signal and generating an AFT signal; A PLL circuit section for varying and outputting the tuning voltage in a direction of reducing a deviation between the local oscillation frequency and a frequency corresponding to input data; And sequentially increasing the channel data from the initial channel data and outputting the channel data to the PLL circuit, wherein the channel tuned by the channel data in response to the input of the AFT signal corresponds to the AFT signal and the frequency difference of the first broadcasting method. If the frequency deviation is close to the frequency deviation of the first and second broadcasting methods, select the second broadcasting method. If the frequency deviation is close to the frequency deviation of the first and third broadcasting methods, select the third broadcasting method and if it is close to zero. And a broadcast method automatic selection circuit unit for selecting a first broadcast method. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940002541A 1994-02-14 1994-02-14 Auto-selection method & apparatus of broadcasting formula KR0126797B1 (en)

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KR1019940002541A KR0126797B1 (en) 1994-02-14 1994-02-14 Auto-selection method & apparatus of broadcasting formula

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KR950026218A true KR950026218A (en) 1995-09-18
KR0126797B1 KR0126797B1 (en) 1997-12-29

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