KR940000157B1 - Apparatus and method for transferring automatically between 3 different color tv systems - Google Patents

Apparatus and method for transferring automatically between 3 different color tv systems Download PDF

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KR940000157B1
KR940000157B1 KR1019910002280A KR910002280A KR940000157B1 KR 940000157 B1 KR940000157 B1 KR 940000157B1 KR 1019910002280 A KR1019910002280 A KR 1019910002280A KR 910002280 A KR910002280 A KR 910002280A KR 940000157 B1 KR940000157 B1 KR 940000157B1
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pal
color
output
ntsc
unit
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Korean (ko)
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임병진
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주식회사 금성사
이헌조
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Abstract

The apparatus for converting automatically 3 types of broadcasting systems in color TV comprises discreminating means for discreminating whether or not a color exists in color killer part, a frequency detector for detecting the vertical synchronous signal, a controller for converting the type of broadcasting system with discreminated signal, switching means for resetting all switches and selecting the type of broadcasting system according to frequency of synchronous signal if the output of system is high, and a generator controlled by the controller and the switching means.

Description

칼라 TV의 3시스템 자동 전환장치 및 방법3 system automatic switching device and method of color TV

제1도는 본발명의 블록도.1 is a block diagram of the present invention.

제2도는 본발명의 회로도.2 is a circuit diagram of the present invention.

제3도는 본발명에 따른 플로우 챠트.3 is a flow chart according to the present invention.

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

1 : 칼라킬러부 2 : 칼라유무판별부1: color killer part 2: color presence discrimination part

3 : 콘트롤부 4 : 수직신호동기 처리부3: control unit 4: vertical signal synchronization processing unit

5 : 50/60HZ 판별부 6 : 스위칭부5: 50 / 60HZ discrimination unit 6: switching unit

7, 9, 11 : 칼라복조부 8, 10, 12 : 발진기7, 9, 11: color demodulator 8, 10, 12: oscillator

본 발명은 칼라 TV의 3시스템(PAL-N, NTSC, PAL-M)자동 전환장치 및 방법에 관한 것이다.The present invention relates to a three system (PAL-N, NTSC, PAL-M) automatic switching device and method of color TV.

일반적으로 중남미 국가들의 TV방송은 주로 PAL-N, PAL-M, NTSC 3시스템으로 구분되며, 또한 국가간 국경을 초월하여 인접 국가의 방송시청이 가능하므로 다른 시스템의 VCR 시청도 요구되어 각 TV방송국에서는 시스템이 다른 3종류의 방송을 하나의 TV로 시청할수 있도록 하고자 하나 수직동기 주파수에 의해 PAL-N(50HZ)과 NTSC, PAL-M(60HZ)으로 뚜렷이 구분되어 회로적으로 자동감지하기 위한 변수가 될수 있지만 NTSC와 PAL-M간에는 자동감지할 수 있는 변수가 없이 기존 TV셋에는 인위적인 조작으로 변조방식과 칼라복조주파수를 전환하여 시청하였다.In general, TV broadcasting in Latin American countries is mainly divided into PAL-N, PAL-M, and NTSC 3 systems. Also, it is possible to watch broadcasting from neighboring countries across national borders. In order to allow the system to watch three different types of broadcasting on one TV, it is divided into PAL-N (50HZ), NTSC, and PAL-M (60HZ) according to the vertical synchronization frequency. However, there is no automatic detectable parameter between NTSC and PAL-M, and the existing TV set is artificially manipulated to switch modulation method and color demodulation frequency.

즉, 50/60HZ를 판별하여 50HZ(수직동기주파수)일 때 PAL-N을 전환하고 만일 60HZ이면 전환스위치를 이용 PAL-M과 STSC 중 한 시스템을 먼저 선택하고 칼라가 없으면 다른 시스템으로 다시 전환해야 했다.That is, 50 / 60HZ must be determined to switch PAL-N at 50HZ (vertical synchronous frequency) .If it is 60HZ, select one of PAL-M and STSC first using the changeover switch and switch back to another system if there is no color. did.

본발명은 이와 같은 문제점을 감안하여 안출한 것으로 이를 첨부된 도면 제1도 내지 제3도에 의하여 상세히 설명하면 다음과 같다. 본발명은 TV의 칼라킬러부(1)에서 칼라의 유무에 따라 발생하는 전압차를 로직출력으로 발생시키는 칼라유무판별부(2)와, 수직신호동기처리부(4)로부터 50/60HZ 동기신호를 판별하여 로직 출력하는 50/60HZ 판별부(5)와, 양판별부(2)(5)의 출력을 판단 NTSC/PAL을 전환시키는 콘트롤부(3)와, 시스템 출력이 하이레벨일 때 모든 스위치를 리셋시키고 50/60HZ 판별출력에 의해 PAL-M, PAL-N을 전환시키는 스위칭부(6)와, 이들 콘트롤부(3) 및 스위칭부(6)의 출력에 따라 제어되는 NTSC 칼라복조부(7), NTSC 발진기(8), PAL-M 칼라복조부(9), PAL-M 발진기(10), PAL-N 칼라복조부(11), PAL-N 발진기(12) 그리고 상기 NTSC 발진기(8), PAL-M발진기(10), PAL-N발진기(12)의 출력이 입력되는 VCO(전압제어 발진기)(13)등으로 구성된다.The present invention has been devised in view of the above problems, which will be described in detail with reference to FIGS. 1 to 3 as follows. According to the present invention, a color presence / absence discrimination unit (2) which generates a voltage difference generated by the presence or absence of color in the color killer unit (1) of a TV as a logic output, and a 50 / 60HZ synchronization signal from the vertical signal synchronization processing unit (4). 50 / 60HZ judging unit (5) for judging and outputting logic, control unit (3) for switching NTSC / PAL for judging the output of both plates (2) (5), and all switches when the system output is high level And a switching section 6 for switching PAL-M and PAL-N by a 50 / 60HZ discrimination output, and an NTSC color demodulation section controlled according to the outputs of these control sections 3 and 6 ( 7), NTSC oscillator (8), PAL-M color demodulator (9), PAL-M oscillator (10), PAL-N color demodulator (11), PAL-N oscillator (12) and the NTSC oscillator (8) And a VCO (voltage controlled oscillator) 13 to which the output of the PAL-M oscillator 10 and the PAL-N oscillator 12 are input.

제2도는 본발명의 구체적인 회로도로 색신호처리부(IC1)의 칼라킬러부에 차동증폭부(14)를 통하여 콘트롤부(3)를 접속하고, 이 콘트롤부(3)의 출력단에 트랜지스터(Q1)와 발진기(8)를 통하여 상기 색신호 처리부(IC1)의 VCO(13)를 접속함과 아울러 NTSC/PAL스위치(15)를 접속하며, 콘트롤부(3)를 50/60HZ 판별부(5)가 접속된 스위칭부(6)에 접속한 후 이 스위칭부(6)의 스위치(S1)는 칼라복조부(16)에, 스위치(S2)는 트랜지스터(Q2)(Q3)에 접속하여서 구성된 것이다.FIG. 2 is a detailed circuit diagram of the present invention. The control unit 3 is connected to the color killer unit of the color signal processing unit IC 1 through the differential amplifier unit 14, and the transistor Q 1 is connected to the output terminal of the control unit 3. And the oscillator 8 connect the VCO 13 of the color signal processing unit IC 1 and the NTSC / PAL switch 15, and connect the control unit 3 to the 50 / 60HZ discriminator 5 Is connected to the switching section 6 to which the switch S 1 of the switching section 6 is connected to the color demodulation section 16, and the switch S 2 is connected to the transistor Q 2 and Q 3 . It is composed.

도면중 미설명부호 Vcc는 직류전원, R1-R3는 저항이며, 단 칼라복조부(16)는 NTSC칼라복조부(7)와 PAL-M칼라복조부(9) 그리고 PAL-N칼라복조부(11)가 포함된다.In the figure, reference numeral Vcc denotes a DC power supply, R 1 -R 3 denotes a resistance, except that the color demodulation unit 16 is an NTSC color demodulation unit 7, a PAL-M color demodulation unit 9, and a PAL-N color copy. Grandfather 11 is included.

이와 같이 구성된 본 발명은 칼라킬러부(1)에서 칼라가 있고 없음에 따라 발생하는 전압차를 하이레벨/로우레벨로 논리화 출력하도록 칼라유무판별부(2)를 구성하고 이를 PAL-M 또는 NTSC 수신모드에 위치시켜 칼라가 있으면 계속 한 시스템 수신모드에 유지시키고 칼라가 없으면 다른 시스템 수신모드로 자동전환시킬수 있도록 한것으로, 예를들어 NTSC 수신모드일 때 NTSC 칼라복조방식 선택과 NTSC 칼라복조 주파수용 발진기를 선택하여 NTSC 방송이라도 약간의 주파수 차이가 생기는 PAL-M용 발진기를 설치하면 혹백 방송만 수신가능하므로 자동 변환이 가능하게 된다.The present invention configured as described above configures the color presence / absence discrimination unit 2 so as to logically output the voltage difference generated due to the absence of color in the color killer unit 1 to a high level / low level, and the PAL-M or NTSC. It is located in the reception mode so that if there is a color, it is kept in one system reception mode and if there is no color, it can be automatically switched to the other system reception mode.For example, in NTSC reception mode, NTSC color demodulation method and NTSC color demodulation frequency oscillator If you select and install an oscillator for PAL-M that has a slight frequency difference even for NTSC broadcasts, it is possible to receive only the hoax broadcasts, so that automatic conversion is possible.

이하에서 제2도를 참고하여 본발명을 더욱 상세히 설명하고자 한다.Hereinafter, the present invention will be described in more detail with reference to FIG. 2.

먼저, 50/60HZ 판별부(5)에서 발생하는 50/60HZ 판별논리출력이 하이레벨이면 스위칭부(6)의 스위치(S2)가 도면과 같이 위치되어 트랜지스터(Q3)가 온됨과 동시에 PAL-N용 발진기(12)가 선택되고 PAL칼라복조를 선택하게 되면, 콘트롤부(3)에서는 시스템 출력이 로우레벨로 되어 PAL 복조를 행하게된다. 또한, 50/60HZ 판별부(5)의 출력이 로우레벨이면 콘트롤부(3)에서는 먼저 칼라킬러부(1)의 색유무 판별을 읽어 칼라가 있으면(하이 레벨이면) NTSC 또는 PAL-M에 관계없이 일정 시간 후에 다시 칼라유무를 읽는다. 만일, 계속해서 칼라가 있으면 기존 시스템 출력을 그대로 유지한다.First, when the 50 / 60HZ discrimination logic output generated by the 50 / 60HZ discrimination unit 5 is at a high level, the switch S 2 of the switching unit 6 is positioned as shown in the figure so that the transistor Q 3 is turned on and at the same time PAL. When the -N oscillator 12 is selected and PAL color demodulation is selected, the control unit 3 goes to a low level so that PAL demodulation is performed. If the output of the 50 / 60HZ judging section 5 is at a low level, the control section 3 first reads the color killer section 1 to determine whether there is a color (if it is at a high level). After a period of time without reading the color again. If there is still color, the existing system output is retained.

한편, 50/60HZ 판별부(5)의 출력이 로우레벨이면서 칼라가 없으면 현재의 시스템 출력이 하이레벨(NTSC 경우)일 때는 로우레벨(PAL 경우)로, 현재의 시스템 출력이 로우레벨(PAL 경우)일 때는 하이레벨(NTSC 경우)로 전환된다. 또한, 일정시간 지연후 50/60HZ 판별출력이 로우레벨일 때 칼라가 없으면 다시 상기와 같은 동작을 반복 수행한다.On the other hand, if the output of the 50 / 60HZ discriminator 5 is low level and there is no color, the current system output is low level (PAL) when the current system output is high level (NTSC), and the current system output is low level (PAL). ) Is switched to the high level (for NTSC). In addition, if there is no color when the 50 / 60HZ discrimination output is at a low level after a predetermined time delay, the above operation is repeated.

만일, NTSC 흑백 방송이 수신되면 시스템 출력은 일정시간을 주기로 하이레벨/로우레벨을 반복 수행하게 된다.If the NTSC monochrome broadcast is received, the system output repeats the high level and the low level at regular intervals.

또 시스템 출력이 하이레벨(NTSC 경우)이 되면 NTSC/PAL 스위치(15)를 NTSC로 하고 스위칭부(6)의 입력에 관계없이 출력을 차단함과 아울러 트랜지스터(Q1)를 온, 발진기(8)를 작동시켜 NTSC 서브 캐리어가 발생하게 되며, 시스템 출력이 로우레벨(PAL-M 경우)이 되면 NTSC/PAL 스위치(15)를 PAL로 하고 트랜지스터(Q1)를 오프시킴과 동시에 스위칭부(6)의 스위치(S2)가 점선과 같이 위치되어 트랜지스터(Q2)가 온되고, 이에따라 PAL-M용 발진기(10)가 발진하여 PAL-M 칼라복조를 하게 된다.When the system output is high level (in case of NTSC), the NTSC / PAL switch 15 is set to NTSC, the output is cut off regardless of the input of the switching section 6, and the transistor Q 1 is turned on and the oscillator 8 NTSC subcarrier is generated, and when the system output becomes low level (in case of PAL-M), the NTSC / PAL switch 15 is set to PAL and the transistor Q 1 is turned off. The switch S 2 of ) is positioned like a dotted line so that the transistor Q 2 is turned on, and accordingly, the oscillator 10 for PAL-M oscillates to perform PAL-M color demodulation.

이하에서 콘트롤부(3)의 기능을 제3도를 따라 설명하면, 먼저 50/60HZ 판별부(5)에서 50HZ이면 PAL-N으로 수신모드로 셋하고, 60HZ일 때 PAL-M으로 수신모드를 셋하고 딜레이 시킨 후 칼라가 있으면 현 시스템을 유지, 일정시간 지연 후 다시 칼라유무를 판단한다.Hereinafter, the function of the control unit 3 will be described with reference to FIG. 3. First, the 50 / 60HZ determination unit 5 sets the reception mode to PAL-N at 50HZ, and sets the reception mode to PAL-M at 60HZ. After setting and delaying, if there is a color, the current system is maintained.

또 칼라가 없으면 NTSC 수신모드를 셋한다.If there is no color, set NTSC reception mode.

이상과 같은 본발명은 TV/VCR의 각 시스템에 무관하게 NTSC, PAL-M, PAL-N 기능이 자동으로 전환되어 제품의 사용이 더욱 편리해지는 효과를 갖는 것이다.As described above, the present invention has an effect that NTSC, PAL-M, and PAL-N functions are automatically switched regardless of each system of the TV / VCR, thereby making the use of the product more convenient.

Claims (2)

TV의 칼라킬러부(1)에서 칼라의 유무에 따라 발생하는 전압차를 로직 출력으로 발생시키는 칼라유무 판별부(2)와, 수직신호동기처리부(4)로 부터 50/60HZ 동기신호를 판별하여 로직출력하는 50/60HZ 판별부(5)와, 상기 판별부(2)(5)의 출력을 판단 NTSC/PAL을 전환시키는 콘트롤부(3)와, 시스템 출력이 하이레벨일 때 모든 스위치를 리셋시키고 50/60HZ 판별출력에 의해 PAL-M, PAL-N을 전환시키는 스위칭부(6)와, 이들 콘트롤부(3) 및 스위칭부(6)의 출력에 의해 제어되는 발진기(8) (10) (12)등으로 구성됨을 특징으로 하는 칼라 TV의 3시스템 자동 전환 장치.50 / 60HZ sync signal is discriminated from the color presence discrimination unit 2 and the vertical signal synchronizing process unit 4, which generate the voltage difference generated by the color killer unit 1 according to the presence or absence of the color as a logic output. 50 / 60HZ determining section 5 for logic output, control section 3 for switching NTSC / PAL for judging the output of the determining section 2, 5, and reset all switches when the system output is high level. Switching section 6 for switching PAL-M and PAL-N by means of a 50 / 60HZ discrimination output, and an oscillator 8 controlled by the output of these control section 3 and switching section 6 (10) 3 system automatic switching device of color TV characterized by consisting of (12) and the like. 콘트롤부(3)에서 수직동기 주파수를 판별하여 PAL-N 모드와 PAL-M 모드를 판별하고 PAL-M 모드일 때 칼라유무를 판별하여 NTSC 수신 모드로 전환할 것으로 결정하는 칼라 TV의 3시스템 자동 전환 방법.The control unit 3 determines the vertical synchronization frequency, determines the PAL-N mode and the PAL-M mode, and determines whether to switch to the NTSC reception mode by determining the color presence in the PAL-M mode. How to switch.
KR1019910002280A 1991-02-11 1991-02-11 Apparatus and method for transferring automatically between 3 different color tv systems KR940000157B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7914843B2 (en) 2004-12-31 2011-03-29 Lg Display Co., Ltd. Slit coater having pre-applying unit and coating method using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7914843B2 (en) 2004-12-31 2011-03-29 Lg Display Co., Ltd. Slit coater having pre-applying unit and coating method using the same

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