KR900003476Y1 - Picture inserting circuit for on screen displayer - Google Patents
Picture inserting circuit for on screen displayer Download PDFInfo
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- KR900003476Y1 KR900003476Y1 KR2019870012924U KR870012924U KR900003476Y1 KR 900003476 Y1 KR900003476 Y1 KR 900003476Y1 KR 2019870012924 U KR2019870012924 U KR 2019870012924U KR 870012924 U KR870012924 U KR 870012924U KR 900003476 Y1 KR900003476 Y1 KR 900003476Y1
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- chroma
- luminance
- screen
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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
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
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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
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/44504—Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
Abstract
내용 없음.No content.
Description
제1도는 종래의 온스크린 표시기기의 회로도.1 is a circuit diagram of a conventional on-screen display.
제2a, b도는 문자 "AB"를 나타낼 경우에 문자 발생 집적소자의 출력신호 파형도.2A and 2B are output signal waveform diagrams of the character generating integrated device in the case of the character " AB "
제3도는 본 고안의 화면삽입회로도.3 is a screen insertion circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
11 : 마이콤 12 : 문자발생직접소자11: microcomputer 12: character generating direct element
13, 25 : 밴드패스필터 14, 24 : 로우패스필터13, 25: band pass filter 14, 24: low pass filter
15 : 크로마디코더 16 : 멀티플렉서15: Chromacoder 16: Multiplexer
17 : 아날로그/디지탈변환기 18 : 메모리17: analog / digital converter 18: memory
19 : 휘도/크로마분리기 20 : 휘도엔코더19: luminance / chroma separator 20: luminance encoder
21 : 크로마엔코더 22, 23 : 디지탈/아날로그변환기21: chroma encoder 22, 23: digital / analog converter
26 : 혼합기 27 : 버퍼26: Mixer 27: Buffer
SW11-SW13: 스위치 PIC : 자화면바탕색신호SW 11 -SW 13 : Switch PIC: White background signal
CHC : 문자신호 VIS : 영상신호CHC: Text Signal VIS: Video Signal
C : 크로마신호 Y : 휘도신호C: Chroma Signal Y: Luminance Signal
MP : 모화면신호 R-Y, B-Y : 색차신호MP: Mother screen signal R-Y, B-Y: Color difference signal
PI/: 자화면색 상/문자선택신 ON/: 온스크린/영상신호선택신호PI / : Screen color / Text selection ON / : On Screen / Video Signal Selection Signal
MIP/: 모화면/자화면선택 신호MIP / : Mother / child screen selection signal
본 고안은 온스크린(ONSCREEN)즉, 화면에 채널번호 및 현재시간 등과 같이 사용자가 필요로 하는 여러가지의 정보를 나타낼 수 있는 비디오 카세트 레코더등과 같은 온스크린 표시기기에 있어서, 모화면에 자화면을 나타낼 수 있게 한 온스크린 표시기기의 화면삽입회로에 관한 것이다.The present invention provides an on-screen display device such as a video cassette recorder that can display various information required by the user, such as channel number and current time, on a screen. A screen insertion circuit of an on-screen display device is shown.
종래의 온스크린 표시기기는 제1도에 도시한 바와 같이 마이콤(1)의 출력신호에 따라 문자발생집적소자(2)가 스위치(SW1)를 제어하여 영상신호(VI)에 문자신호를 혼합하였다.In the conventional on-screen display device, as shown in FIG. 1, the character generation integrated element 2 controls the switch SW 1 according to the output signal of the microcomputer 1 to mix the character signal with the image signal VI. It was.
즉, 제2a도에 도시한 바와 같이 화면에 분자 "AB"의 라인(X)를 표시할 경우에 스위치(SW1)의 가동단자를 타측고정단자(b1)에 단락시켜 영상신호(VI)를 출력시키면서 문자 "AB"를 표시할 위치가 되면, 문자 발생집적소자(2)에서 제2b도에 도시한 바와 같이 펄스 신호를 출력하면서 스위치(SW1)의 가동단자를 그의 일측 고정단자(a1)에 단락시켜 전원단자(Vcc)의 전원을 저항(R1) 및 가변저항(VR1)으로 분할한 화이트레벨(white level) 즉, 문자신호를 출력하게 하였으므로 브라운관은 영상신호의 화면위에 문자를 나타내게 되어 문자를 나타내는 영상신호의 화면의 주변색상이 문자의 색상과 비슷한 백색일 경우에는 그 나타난 문자가 무엇인지 사용자가 식별할 수 없는 결함이 있었다.That is, as shown in FIG. 2A, when the line X of the molecule XAB is displayed on the screen, the movable terminal of the switch SW 1 is shorted to the other fixed terminal b 1 so that the image signal VI When the position is to be displayed while displaying the letter " AB ", the movable terminal of the switch SW 1 is fixed at one side thereof while outputting a pulse signal from the character generating integrated element 2 as shown in FIG. 1 ) short-circuit to the power supply terminal (Vcc) to output a white level (that is, a text signal) divided into a resistor (R 1 ) and a variable resistor (VR 1 ), so that the CRT displays a character on the screen of the video signal. When the peripheral color of the screen of the image signal representing the character is white similar to the color of the character, there is a defect that the user cannot identify what the displayed character is.
본 고안은 이와 같은 종래의 결함을 감안하여, 브라운관의 전체화면 즉, 모화면에 일정바탕 색상을 가지는 자화면은 삽입하여 그 자화면에 온스크린 표시를 함은 물론 다른 여러가지의 영상신호를 나타낼 수 있게 안출한 것으로, 이를 첨부된 제3도의 도면에 의하여 상세히 설명하면 다음과 같다.The present invention allows the whole screen of the CRT, that is, the mother screen having a certain color to be inserted into the mother screen, to display on-screen display as well as to display various video signals. As described in detail with reference to the accompanying drawings of FIG. 3 as follows.
제3도는 본 고안의 화면삽입 회로도로서, 이에 도시한 바와 같이 마이콤(11)의 제어로 문자발생집적소자(12)에서 출력되는 자화면색상/문자선택신호(PI/)에 따라 자화면 바탕색신호(PIC) 또는 전원단자(Vcc)의 전원이 가변저항(VR11) 및 저항(R11)을 통한 문자신호(CHC)를 출력하는 스위치(SW11)와, 상기 마이콤11)에서 출력 되는 온스크린/영상선택 신호(ON/)에 따라 상기 스위치(SW1)의 출력 신호 또는 영상신호(VIS)를 출력 하는 스위치(SW2)와, 상기 스위치(SW2) 이 출력신호에서 크로마신호(C) 및 휘도신호(Y)를 분리하는 밴드패스필터(13) 및 로우패스필터(14)와, 상기 밴드패스필터(13)에서 출력된 크로마신호(C)를 디코딩하여 색차신호(R-Y) (B-Y)를 출력하는 크로마디코더(15)와, 상기 크로마디코더(15)에서 출력된 색차신호(R-Y) (B-Y) 및 토우패스필터(14)에서 출력된 휘도신호(Y)를 선택적으로 출력 즉, R-Y-Y-Y-B-Y-Y-Y-R-Y 순으로 출력하는 멀티플렉서(16)와, 상기 멀티플렉서(16)의 출력신호를 디지탈신호로 변환하는 아날로그/디지탈변환기(17)와, 상기 아날로그/디지탈변환기(17)의 출력신호를 저장하면서 출력하는 메모리(18)와, 상기 메모리(18)의 출력신호에서 휘도신호와 크로마 신호를 분리하는 휘도/크로마분리기(19)와, 상기 휘도/크로마분리기(19)에서 출력된 휘도 및 크로마신호를 엔코딩 하는 휘도 및 크로마엔코더(20) (21)와, 상기 휘도 및 크로마엔코더(20) (21)의 출력신호를 아날로그신호로 변환하는 디지탈/아날로그변환기(22) (23)와, 상기 디지탈/아날로그변환기(22) (23)의 출력신호에서 휘도 및 크로마신호를 통과시키는 로우패스필터(24) 및 밴드패스필터(25)와, 상기 로우패스필터(24) 및 밴드패스필터(25)의 출력신호를 혼합하는 혼합기(26)와, 모화면/자화면선택신호(MIP/)에 따라 상기 혼합기(26)의 출력신호 또는 모화면 신호(MP)를 버퍼(27)를 통해 출력시키는 스위치 (SW13)로 구성 하였다.3 is a screen insertion circuit diagram of the present invention, and as shown therein, the sub picture color / character selection signal (PI /) output from the character generation integrated element 12 under the control of the microcomputer 11. And a switch SW 11 for outputting the character signal CHC through the variable resistor VR 11 and the resistor R 11 to the power of the sub screen background color signal PIC or the power terminal Vcc according to the present invention. 11) On-screen / video selection signal (ON / Switch SW 2 for outputting the output signal or the video signal VIS of the switch SW 1 , and the switch SW 2 outputs the chroma signal C and the luminance signal Y from the output signal. A band pass filter 13 and a low pass filter 14 to be separated, and a chroma decoder 15 for decoding the chroma signal C output from the band pass filter 13 and outputting a color difference signal RY (BY). ) And a multiplexer 16 for selectively outputting the color difference signal RY (BY) output from the chroma decoder 15 and the luminance signal Y output from the toe pass filter 14, that is, in the order of RYYYBYYYRY. And an analog / digital converter 17 for converting the output signal of the multiplexer 16 into a digital signal, a memory 18 for storing and outputting the output signal of the analog / digital converter 17, and the memory ( A luminance / chromatometer 19 for separating the luminance signal and the chroma signal from the output signal of the present invention; Luminance and chroma encoders 20 and 21 for encoding the luminance and chroma signals output from the degree / chroma separator 19, and digital signals for converting the output signals of the luminance and chroma encoders 20 and 21 into analog signals. A low pass filter (24) and a band pass filter (25) for passing luminance and chroma signals in the output signals of the / analog converters (22) and (23), and the digital / analog converters (22) and (23); A mixer 26 for mixing the output signals of the pass filter 24 and the band pass filter 25, and a mother screen / sub picture selection signal (MIP / ) Is configured as a switch (SW 13 ) for outputting the output signal of the mixer 26 or the mother screen signal (MP) through the buffer (27).
이와 같이 구성된 본 고안이 작용효과를 상세히 설명하면 다음과 같다.When the present invention configured as described in detail the working effect is as follows.
전원단자(Vcc)에 전원이 인가되고, 모화면에 자화면을 삽입하여 온스크린표시 즉, 문자를 표시할 경우에 마이콤(11)에서 출력되는 신호에 따라 문자발생 집적소자(12)가 자화면 색상/문자선택신호 (PI/)로 스위치(SW1)를 제어하여 자화면 바탕색 신호(PIC)와 문자신호(CHC)를 혼합하게 되고, 그 혼합된 신호는 마이콤(11)에서 출력되는 온스크린/영상선택신호(ON/VI)에 따라 스위치(SW12)를 통해 밴드패스필터(12) 및 로우패스필터(13)에 입력되어 크로마신호(C)와 휘도신호(17)로 분리되며, 그 크로마신호(C)는 크로마디코더(15)에서 디코명되어 색차신호(R-Y) (B-Y)로 된 후 휘도신호(Y)와 함께 멀티플리서(16)에 입력되므로 멀티플렉서(15)는 그 색차신호(R-Y) (B-Y)와 휘도신호(Y)를 R-Y-Y-Y-B-Y-Y-T-R-Y 순으로 출력하고, 그 출력된 색차신호(R-Y) (B-Y) 및 휘도신호(Y)는 아날로그/디지탈변환기 (17)에서 디지탈 신호로 변환된 후 메모리(18)에 저장되면서 휘도/크로마분리기(19)에 입력된다.When the power is applied to the power supply terminal Vcc, and the character screen is inserted into the mother screen to display the on-screen display, that is, the character, the character generating integrated device 12 is the child screen according to the signal output from the microcomputer 11. Color / Text Selection Signal (PI / ) To control the switch (SW 1 ) to mix the sub screen background color signal (PIC) and the character signal (CHC), and the mixed signal is an on-screen / image selection signal (ON / VI) output from the microcomputer 11. Is input to the band pass filter 12 and the low pass filter 13 through the switch SW 12 and separated into a chroma signal C and a luminance signal 17, and the chroma signal C is a chroma decoder. Decoded at (15) to become the color difference signal RY (BY) and then input to the multiplexer 16 together with the luminance signal Y, so that the multiplexer 15 has luminance with the color difference signal RY (BY). The signal Y is output in the order of RYYYBYYTRY, and the output color difference signal RY (BY) and the luminance signal Y are converted into a digital signal in the analog / digital converter 17 and then stored in the memory 18. Input to the luminance / chroma separator 19.
이와 같이 휘도/크로마분리기(19)에 디지탈신호로 변환된 색차신호(R-Y) (B-Y) 및 휘도신호(Y)가 입력되면, 휘도/크로마분리기(17)는 휘도신호와 크로마신호를 분리하여 출력하고, 그 휘도 및 크로마신호는 휘도 및 크로마엔코더(20) (21)를 통해 엔코딩되고, 디지탈/아날로그변환기(22) (23)를 통해 아날로그신호로 변환된후 저역통과 필터(24) 및 대역통과필터(25)를 통해 흔합기(26)에 입력되어 혼합되므로 혼합기(26)는 자화면바탕색신호(PIC)와 문자신호(CHC)가 혼합된 자화면신호를 출력하고, 그 출력한 자화면신호는 모화면/자화면선택신호(MIP/)에 따라 스위치(SW13)를 통해 모화면 신호(MP)와 합쳐진 후 버퍼(27)를 통해 출력되므로 브라운관에는 일정바탕색을 가지는 자화면이 삽입된 모화면이 나타나고, 그 자화면 에는 소정와 정보를 가지는 문자가 표시된다.When the color difference signal RY (BY) and the luminance signal Y converted into digital signals are input to the luminance / chroma separator 19 as described above, the luminance / chroma separator 17 separates the luminance signal and the chroma signal and outputs them. The luminance and chroma signals are encoded by the luminance and chroma encoders 20 and 21, and converted into analog signals through the digital / analog converters 22 and 23, and then the low pass filter 24 and the band pass. Since the mixer 25 is input and mixed through the filter 25, the mixer 26 outputs the sub-screen signal in which the sub-screen color signal PIC and the character signal CHC are mixed, and outputs the sub-screen signal. Is the mother screen / sub picture selection signal (MIP / ) Is combined with the parent screen signal (MP) through the switch (SW 13 ) and then output through the buffer (27), so that the mother screen with a certain color is inserted in the CRT. Branch is displayed.
그리고, 자화면에 영상신호(VIS)를 나타낼 경우에는 마이콤(11)에서 출력되는 온스크린/영상선택신호(ON/)에 의해 영산신호(VIS)가 스위치(SW12)를 통하게 되므로 혼합기(26)는 영산신호(VIS)를 출력하게 되고, 그 출력된 영상신호(VIS)는 모화면/자화면선택신호(MIP/)에 따라 모화면 신호(MP)와 합쳐진 후 버퍼(27)를 통해 출력되어 브라운관에는 영상신호(VIS)가 나타나는 자화면이 삽입된 모화면이 나타나게 된다.When the video signal VIS is displayed on the own screen, the on-screen / video selection signal (ON / ) Sacred signal (VIS) is therefore placed through the switch (SW 12), a mixer (26) by being output the sacred signal (VIS), that the output video signal (VIS) is a main screen / sub screen selection signal (MIP Of After merged with the mother screen signal (MP) according to the output through the buffer 27 is displayed in the CRT, the mother screen is inserted into the mother screen, the image signal (VIS) appears.
이상에서 상세히 설명한 바와 같이 본 고안은 모화면에 일정바탕색을 가지는 자화면을 삽입하여 온스크린 표시를 하게 되므로 사용자가 온스크린 표시되는 문자가 무엇인지를 쉽게 판독할 수 있음은 물론 자화면에 모화면과는 다른 영상신호를 표시할 수 있는 효과가 있다.As described in detail above, the present invention inserts a child screen having a certain color on the mother screen to perform on-screen display, so that the user can easily read what characters are displayed on the screen. There is an effect that can display a different video signal.
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KR2019870012924U KR900003476Y1 (en) | 1987-07-31 | 1987-07-31 | Picture inserting circuit for on screen displayer |
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KR2019870012924U KR900003476Y1 (en) | 1987-07-31 | 1987-07-31 | Picture inserting circuit for on screen displayer |
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1987
- 1987-07-31 KR KR2019870012924U patent/KR900003476Y1/en not_active IP Right Cessation
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KR890003931U (en) | 1989-04-14 |
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