KR0141838B1 - Method to differentiate a broadcasting type - Google Patents

Method to differentiate a broadcasting type

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Publication number
KR0141838B1
KR0141838B1 KR1019890008666A KR890008666A KR0141838B1 KR 0141838 B1 KR0141838 B1 KR 0141838B1 KR 1019890008666 A KR1019890008666 A KR 1019890008666A KR 890008666 A KR890008666 A KR 890008666A KR 0141838 B1 KR0141838 B1 KR 0141838B1
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South Korea
Prior art keywords
signal
vertical
vertical synchronization
period
broadcasting method
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KR1019890008666A
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Korean (ko)
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KR910002251A (en
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박만식
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구자홍
엘지전자 주식회사
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Priority to KR1019890008666A priority Critical patent/KR0141838B1/en
Publication of KR910002251A publication Critical patent/KR910002251A/en
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    • 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
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

내용없음.None.

Description

수직동기를 이용한 방송방식 판별방법Broadcasting method discrimination method using vertical synchronization

제1도는 본 발명 수직동기를 이용한 방송방식 판별장치의 블럭도.1 is a block diagram of a broadcasting system discriminating apparatus using the vertical synchronization of the present invention.

제2도는 본 발명에서 검출된 수직동기신호의 파형도.2 is a waveform diagram of a vertical synchronization signal detected in the present invention.

제3도는 본 발명 수직동기를 이용한 방송방식 판별방법에 따른 흐름도.3 is a flow chart according to the broadcasting method determination method using the vertical synchronization of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1: 안테나2: 수직동기검출부1: antenna 2: vertical synchronization detector

3: 증폭부4: 입력부3: amplifying section 4: input section

5: 타임카운터6: 카운터5: time counter 6: counter

7: 데이타저장부8: 방송방식판별부7: Data storage unit 8: Broadcasting method discrimination unit

9: 출력부10: 서보용 집적소자9: output unit 10: servo integrated device

11: 마이크로컴퓨터12: 헤드11: microcomputer 12: head

본 발명은 티브이의 방송방식 판별기술에 관한 것으로, 특히 수직동기신호를 분석하여 방송방식을 판별하는 수직동기를 이용한 방송방식 판별방법에 관한 것이다.The present invention relates to a broadcast method discrimination technology of a TV, and more particularly, to a broadcast method discrimination method using vertical sync for determining a broadcast method by analyzing a vertical sync signal.

종래에는 방송방식을 판별하지 못하거나 외부에서 사용자가 결정해야하고, 녹화시에도 사용자가 미리 선택해야 하며, 방송방식이 복잡한 지역에서는 녹화 또는 재생시 방송방식을 외부에서 선택해야 하므로 사용자에 의한 선택실수가 다분히 발생되는 문제점이 있었다.In the prior art, the broadcasting method cannot be determined or the user must decide externally, and the user must select in advance when recording, and in a region where the broadcasting method is complicated, the broadcasting method must be selected externally during recording or playback. There was a problem that occurs a lot.

따라서, 본 발명의 목적은 수직동기신호의 평균주기를 카운터로 검출하고, 그 평균주기로 부터 수직동기신호의 주파수를 산출하여 방송방식을 판별함으로써 방송방식에 무관하게 내부에서 방송방식을 정확히 자동판별할 수 있는 수직동기를 이용한 방송방식 판별방법을 제공함에 있다.Accordingly, an object of the present invention is to detect the average period of the vertical synchronization signal with a counter, calculate the frequency of the vertical synchronization signal from the average period, and determine the broadcasting method to accurately determine the broadcasting method internally regardless of the broadcasting method. The present invention provides a method for determining a broadcast method using vertical synchronization.

이러한 목적에 따른 본 발명 수직동기를 이용한 방송방식 판별방법은, 녹화 또는 재생시 수직동기검출부에서 검출된 수직동기신호를 입력받아 그 수직동기신호의 레벨이 변하는 시점을 카운터로 검출하고, 그 검출신호로 부터 상기 수직동기신호의 주기를 구한 후 상기 동작으 소정 횟수 반복 수행하는 제1과정과, 상기 반복수행하여 얻은 수직동기신호의 주기를 평균하여 평균주기를 구하고, 그 구한 평균 주기로부터 수직동기신호의 주파수를 산출한 후 저장된 기준값과 비교하여 방송방식을 판별하는 제2과정을 포함하여 이루어진다.In the broadcast method determination method using the vertical synchronization according to the present invention, the vertical synchronization signal detected by the vertical synchronization detection unit during recording or playback receives the time when the level of the vertical synchronization signal is changed by the counter, the detection signal After obtaining the period of the vertical synchronization signal from the first step of repeating the operation a predetermined number of times, and the average period by averaging the period of the vertical synchronization signal obtained by performing the repetition to obtain the average period, and from the obtained average period of the vertical synchronization signal Comprising a second process of determining the broadcast method by calculating the frequency of the comparison with the stored reference value.

이와같이 이루어진 본 발명 수직동기를 이용한 방송방식 판별방법에 대하여 하나의 구체적 실시예를 나타낸 제1도 내지 제3도를 참조하여 본 발명의 작용 및 효과를 상세히 설명한다.The operation and effects of the present invention will be described in detail with reference to FIGS. 1 to 3 showing one specific embodiment of the method for discriminating the broadcasting method using the vertical synchronization of the present invention.

제1도는 본 발명 수직동기를 이용한 방송방식 판별방법의 실시에 직접 사용되는 수직동기를 이용한 방송방식 판별장치에 대한 하나의 실시예를 나타낸 것으로, 녹화 또는 재생시 안테나(1) 또는 헤드(12)를 통한 방송신호로부터 수직동기신호를 검출하는 수직동기검출부(2)와, 상기 수직동기검출부(2)에서 검출한 수직동기신호를 소정의 이득에 따라 증폭하는 증폭부(3)와, 상기 증폭부(3)에서 증폭된 수직동기신호의 주파수를 산출하여 방송방식을 판별하는 마이크로컴퓨터(11)와, 상기 마이크로컴퓨터(11)에 의해 판별된 방송방식에 따라 모터콘트롤신호(제어신호)를 출력하여 모터를 제어하는 서보용 집적소자(10)로 구성되어 있다.FIG. 1 shows an embodiment of an apparatus for determining a broadcasting method using vertical synchronization, which is used directly in the method of determining a broadcasting method using vertical synchronization. The antenna 1 or the head 12 during recording or playback is shown in FIG. A vertical synchronous detection unit 2 for detecting a vertical synchronous signal from a broadcast signal through a signal, an amplifying unit 3 for amplifying the vertical synchronous signal detected by the vertical synchronous detection unit 2 according to a predetermined gain, and the amplifying unit Outputs a motor control signal (control signal) in accordance with the broadcasting method determined by the microcomputer 11 and the broadcasting method discriminated by the microcomputer 11 by calculating the frequency of the vertical synchronization signal amplified in (3). It consists of the servo integrated element 10 which controls a motor.

이러한 구성에서, 먼저 녹화시에 안테나(1)로 방송신호(비디오신호)가 수신되면, 수직동기검출부(2)에서 그 방송신호로부터 수직동기신호를 검출하고 증폭부(3)에서는 그 검출된 수직동기신호를 소정의 이득에 따라 증폭한다.In this configuration, when a broadcast signal (video signal) is received by the antenna 1 at the time of recording, the vertical synchronization detector 2 detects a vertical synchronization signal from the broadcast signal, and the amplification unit 3 detects the vertical synchronization signal. The synchronization signal is amplified according to a predetermined gain.

그리고, 재생시에는 테이프에 기록되어 있는 비디오신호가 헤드(12)를 통해 재생되어지면, 앞서 녹화시와 마찬가지로 수직동기검출부(2)에서 그 비디오신호로부터 수직동기신호를 검출하고 증폭부(3)에서는 그 검출된 수직동기신호를 소정의 이득에 따라 증폭한다.When the video signal recorded on the tape is reproduced through the head 12 during reproduction, the vertical synchronization detection unit 2 detects the vertical synchronization signal from the video signal as in the case of the previous recording, and the amplification unit 3 The detected vertical synchronization signal is amplified in accordance with a predetermined gain.

이처럼 증폭된 수직동기신호는 마이크로컴퓨터(11)에 입력되고 마이크로컴퓨터(11)는 그 수직동기신호를 스캔하여 수직동기신호의 주파수를 산출하는데 즉, 제2도에서 그 수직동기신호의 레벨이 변하는 임의 한 지점을 카운트시작점으로 하고 그 카운트시작점으로부터 1주기(T)가 지난 지점을 카운트종료점으로 하여 타임카운터(5)에서 카운트동작을 수행하여 수직동기신호의 주기를 구해서 데이타저장부(7)에 저장해 둔다.The amplified vertical synchronous signal is input to the microcomputer 11, and the microcomputer 11 scans the vertical synchronous signal to calculate the frequency of the vertical synchronous signal. That is, the level of the vertical synchronous signal changes in FIG. Counting is performed at the time counter 5 by using a random point as the count start point and a point one cycle T from the count start point as the count end point to obtain the period of the vertical synchronization signal to the data storage unit 7. Save it.

이렇게 수직동기신호의 주기를 저장해 둔 다음, 주기의 오차를 줄이기 위하여 상기 수직동기신호의 주기를 구하는 동작을 카운터(6)로 반복회수를 체크하면서 타임카운터(5)에서 N회 반복하고 이 N회 반복으로 얻은 주기 즉, 데이타저장부(7)에 저장한 주기들을 평균하여 오차없는 수직동기신호의 주기를 구한다.After storing the period of the vertical synchronization signal in this way, in order to reduce the error of the period, the operation of obtaining the period of the vertical synchronization signal is repeated N times in the time counter 5 while checking the number of repetitions with the counter 6 and this N times. Periods obtained by repetition, that is, periods stored in the data storage unit 7 are averaged to obtain periods of error-free vertical synchronization signals.

그리고, 그 구해진 수직동기신호의 주기로부터 수직동기신호의 주파수를 산출해서 이 산출된 주파수가 50 Hz이면 PAL방송방식으로, 그리고 60 Hz이면 NTSC방송방식으로 방송방식판별부(8)에서 판별하고 타임카운터(5)를 클리어시킨다.Then, the frequency of the vertical synchronization signal is calculated from the obtained period of the vertical synchronization signal, and when the calculated frequency is 50 Hz, the PAL broadcasting method is used. Clear the counter 5.

이때, 현재의 방송방식에 앞서 판별된 방송방식과 다르면, 정확을 기하기 위하여 방송방식의 판별을 카운터(6)로 반복회수를 체크하면서 타임카운터(5)에서 M회 반복하는데 그래도 방송방식이 다른 것으로 판별되면 카운터(6)를 클리어시키고, 반면에 현재의 방송방식이 앞서 판별된 방송방식과 동일하면 바로 카운터(6)를 클리어시키고 판별된 상기 방송방식에 따른 제어신호를 출력부(9)를 통해 서보용 집적소자(10)로 보내어 모터의 동작을 제어한다.At this time, if it is different from the broadcasting method determined before the current broadcasting method, in order to determine the broadcasting method, the time counter 5 repeats M times while checking the repetition number with the counter 6, but the broadcasting method is different. If it is determined that the counter 6 is cleared, on the other hand, if the current broadcast method is the same as the previously determined broadcast method, the counter 6 is immediately cleared and the control unit according to the determined broadcast method is outputted to the output unit 9. It sends to the servo integrated device 10 to control the operation of the motor.

이상에서 상세히 설명한 바와같이, 본 발명은 방송방식에 관계없이 마이크로컴퓨터의 내부에서 방송신호를 정확히 자동판별하여 녹화 또는 재생시 사용자의 별도선택에 의한 실수를 제거하므로 사용자에게 녹화 또는 재생에 있어 편리함을 제공할 수 있는 효과가 있다.As described in detail above, the present invention is convenient for recording or playing back to the user since it eliminates the mistake of the user's separate selection during recording or playback by automatically discriminating the broadcast signal inside the microcomputer regardless of the broadcasting method. There is an effect that can be provided.

Claims (2)

녹화 또는 재생시 수직동기검출부에서 검출된 수직동기신호를 입력받아 그 수직동기신호의 레벨이 변하는 시점을 카운터로 검출하고, 그 검출신호로 부터 상기 수직동기신호의 주기를 구한후, 상기 동작을 소정횟수 반복 수행하는 제1과정과, 상기 반복 수행하여 얻는 수직동기신호의 주기를 평균하여 수직동기신호의 평균주기를 구하고, 그 구한 평균 주기로부터 수직동기신호의 주파수를 산출한 후 저장된 기준값과 비교하여 방송방식을 판별하는 제2과정을 포함하여 이루어진 것을 특징으로 하는 수직동기를 이용한 방송방식 판별방법.During recording or playback, the vertical synchronous signal detected by the vertical synchronous detection unit is input to detect a time point at which the level of the vertical synchronous signal changes, and the period of the vertical synchronous signal is determined from the detected signal, and then the operation is determined. The average frequency of the vertical synchronizing signal is obtained by averaging the first process of repeating the number of times and the period of the vertical synchronizing signal obtained by performing the repetition, calculating the frequency of the vertical synchronizing signal from the obtained average period, and comparing the result with the stored reference value. And a second process of determining a broadcast method. 제1항에 있어서, 제2과정에서 산출된 수직동기신호의 주파수가 60Hz이면 NTSC방송방식으로, 50Hz이면 PAL방송방식으로 판별하는 것을 특징으로 하는 수직동기를 이용한 방송방식 판별방법.The method of claim 1, wherein the frequency of the vertical synchronization signal calculated in the second process is determined by the NTSC broadcasting method and the PAL broadcasting method by 50 Hz.
KR1019890008666A 1989-06-22 1989-06-22 Method to differentiate a broadcasting type KR0141838B1 (en)

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KR1019890008666A KR0141838B1 (en) 1989-06-22 1989-06-22 Method to differentiate a broadcasting type

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KR910002251A KR910002251A (en) 1991-01-31
KR0141838B1 true KR0141838B1 (en) 1998-06-15

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