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KR900008891B1 - Separation picture image signal processing circuit of digital tv - Google Patents

Separation picture image signal processing circuit of digital tv Download PDF

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KR900008891B1
KR900008891B1 KR1019870014280A KR870014280A KR900008891B1 KR 900008891 B1 KR900008891 B1 KR 900008891B1 KR 1019870014280 A KR1019870014280 A KR 1019870014280A KR 870014280 A KR870014280 A KR 870014280A KR 900008891 B1 KR900008891 B1 KR 900008891B1
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signal
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color
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circuit
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KR890011437A (en
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박영준
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삼성전자 주식회사
강진구
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/79Processing of colour television signals in connection with recording
    • H04N9/87Regeneration of colour television signals
    • H04N9/873Regeneration of colour television signals for restoring the colour component sequence of the reproduced chrominance signal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/77Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H04N9/78Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Color Television Systems (AREA)
  • Television Systems (AREA)

Abstract

내용 없음.No content.

Description

배밀주사 디지탈 TV의 분리 영상신호 처리회로Separated Image Signal Processing Circuit of Doublet Scanning Digital TV

제1도는 종래 배밀주사 디지탈 TV의 영상신호 처리계의 구성을 보인 블록도.1 is a block diagram showing the configuration of a video signal processing system of a conventional double-tight scan digital TV;

제2도는 본 발명에 따른 배밀주사 디지탈 TV의 분리 영상신호 처리회로의 구성을 보인 블록도.2 is a block diagram showing a configuration of a separated video signal processing circuit of a double-tight scan digital TV according to the present invention.

본 발명은 배밀주사 디지털 TV에 관한 것으로, 특히 휘도신호와 색차신호를 분리하여 녹화하고 재생하는 S-VHS방식의 VTR에 연결하여 고화질의 영상을 시청할 수 있도록 하는 배밀주사 디지털 TV의 분리 영상신호 처리회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a doublet scanning digital TV. In particular, a separate video signal processing of a doublet scanning digital TV is provided to connect to an S-VHS type VTR which separately records and reproduces a luminance signal and a color difference signal so that a high quality image can be viewed. It is about a circuit.

일반적으로 배밀주사 디지털 TV는 화질의 고급화를 위해 유럽과 일본 등지에서 개발되었으며, 통상의 TV에 비해 선명한 화면을 시청할 수 있다.In general, double-scan digital TVs have been developed in Europe and Japan for the purpose of enhancing image quality, and are capable of watching clearer screens than conventional TVs.

이러한 배밀주사 디지털 TV의 영상신호 처리계는 제1도에 도시된 바와 같이, 복합 영상신호를 디지탈 신호로 변환하는 아날로그/디지털 변환기(1)와, 복합 영상신호로부터 수평 및 수직 동기신호를 분리해내는 동기분리회로(2)와, 복합 영상신호로부터 휘도신호(Y) 및 색신호(C)를 분리해내는 Y/C 분리회로(3)와, 상기 휘도 및 색신호를 저장하는 메모리(4)와, 메모리(4)에서 읽어낸 휘도 및 색신호를 아날로그 신호로 변환하는 디지탈/아날로그 변환기(5)와, 변환된 휘도신호와 색신호를 합성하여 적, 녹, 청의 원색신호를 만드는 매트릭스회로(6)등으로 구성되어 있다.As shown in FIG. 1, the video signal processing system of the doublet scanning digital TV separates the horizontal and vertical synchronization signals from the composite video signal, and an analog / digital converter 1 for converting the composite video signal into a digital signal. A synchronous separation circuit 2, a Y / C separation circuit 3 for separating the luminance signal Y and the color signal C from the composite video signal, a memory 4 for storing the luminance and color signals; A digital / analog converter 5 for converting the luminance and color signals read out from the memory 4 into analog signals, and a matrix circuit 6 for synthesizing the converted luminance and color signals to produce red, green, and blue primary color signals. Consists of.

여기서, 미설명된 클릭발생회로(7)는 소정의 주기를 가진 클리펄스를 아날로그/디지탈 변환기(1), 동기분리회로(2), Y/C분리회로(3), 메모리(4), 디지탈/아날로그 변환기(5)에 각각 인가하여 각 부품의 작동을 제어하도록 접속된다.Here, the non-described click generation circuit 7 converts the pulpulse having a predetermined period into the analog / digital converter 1, the synchronous separation circuit 2, the Y / C separation circuit 3, the memory 4, and the digital. It is connected to each of the / analog converters 5 to control the operation of each component.

이와 같이 구성된 종래의 배밀주사 디지털 TV는 복합 영상신호가 입력되면 아날로그/디지털 변환기(1)에서 입력된 연속적인 아날로그 신호를 양자화하여 디지털 데이타로 변환하게 된다.In the conventional doublet scanning digital TV configured as described above, when a composite video signal is input, the continuous analog signal input from the analog-to-digital converter 1 is quantized and converted into digital data.

이 데이타들은 동기분리회로(2)와 Y/C 분리회로 (3)로 각각 인가되는데, 동기분리회로(2)에서는 브라운관에 전자빔을 주사할 때 수평편향과 수직편향을 제어하기 위해 복합 영상신호로부터 수평동기신호와 수직동기신호를 각각 분리하여 출력하고, Y/C분리회로(3)에서는 복합 영상신호로부터 휘도신호(Y)와 색차신호(R-Y), (B-Y)를 분리해낸 뒤, 색차신호(R-Y), (B-Y)를 멀티플렉싱(Multiplexing)한 색신호(C)와 휘도신호(Y)를 각각 출력하여 메모리(4)에 기록하게 된다.These data are applied to the synchronous separation circuit (2) and the Y / C separation circuit (3), respectively. In the synchronous separation circuit (2), the composite video signal is used to control the horizontal and vertical deflection when scanning the electron beam into the CRT. The horizontal and vertical synchronization signals are separated and output, and the Y / C separation circuit 3 separates the luminance signal Y and the color difference signals RY and BY from the composite video signal, and then the color difference signal ( Color signals C and luminance signals Y obtained by multiplexing RY and BY are respectively output and written into the memory 4.

메모리(4)로부터 데이타를 읽어낼 경우에는 판독시간을 기록시간보다 2배로 빠르게하여 수평주사기간(1H)동안 배밀주사할 휘도신호(Y)와 색신호(C)를 2번 읽어낸다.When reading data from the memory 4, the reading time is twice as fast as the writing time, and the luminance signal Y and the color signal C to be double-scanned during the horizontal scanning period 1H are read twice.

이 데이타들은 디지탈/아날로그 변환기(5)에 의해 아날로그 신호로 변환된 뒤 매트릭스회로(6)로 인가되고, 매트릭스회로(6)에서는 휘도신호(Y)와 색차신호(R-Y), (B-Y)를 합성하여 원색신호(R, G, B)를 만든 후 이 신호를 브라운관 구동회로로 인가하게 된다.These data are converted into analog signals by the digital / analog converter 5 and then applied to the matrix circuit 6, where the luminance signal Y, the color difference signals RY, and BY are synthesized. After the primary color signals R, G, and B are generated, the signals are applied to the CRT driving circuit.

이와 같이 동작하는 종래의 배밀주사 디지탈 TV는 영상신호를 디지탈 형태로 변환하여 신호 처리를 하므로 잡음이 유입되거나 왜곡이 생길 기회가 적고, 주사선의 증가로 화면 상태가 선명해지는 특징이 있다.In the conventional double-tight scan digital TV operating as described above, the image signal is converted into a digital form to perform signal processing, so there is little chance of noise or distortion, and the screen state becomes clear due to an increase in scanning lines.

그러나 복합 영상신호로부터 휘도신호와 색차신호를 완벽하게 분리하는 것이 어려움에 따라 배밀주사 디지털 TV에서도 휘도신호와 색차신호의 분리가 정확하지 못하므로 화질이 망실된다는 문제점이 있었다.However, since it is difficult to completely separate the luminance signal and the chrominance signal from the composite video signal, the image quality is lost because the separation of the luminance signal and the chrominance signal is not accurate even in a doublet scanning digital TV.

또 이러한 화질 망실의 문제점을 해결하기 위해 휘도신호와 색차신호를 분리하여 녹화하고 재생하도록 된 S-VHS VTR이 개발되었고, 그로부터 출력된 분리된 영상신호를 S단자를 통해 수신하여 원상태로 재생하는 TV도 개방, 시판되었다.In order to solve the problem of image quality loss, S-VHS VTR was developed to separate and record the luminance signal and the chrominance signal, and the TV which receives the separated video signal output from it through the S terminal and plays it back to its original state Also open, commercially available.

그러나 종래의 배밀주사 디지털 TV는 복합 영상신호를 받아 신호 처리를 하므로 휘도신호와 색차신호가 분리된 S-VHS 방식의 영상신호를 수신할 경우 원상태로 재생할 수 없는 문제점이 있었다.However, since the conventional doublet scanning digital TV receives a composite video signal and processes the signal, when the S-VHS video signal having the luminance signal and the color difference signal is received, there is a problem in that it cannot be played back.

따라서 본 발명의 목적은 S-VHS VTR등에서 출력되는 분리된 영상신호를 수신하여 휘도신호와 색신호의 망실없이 원상태로 재생시킬 수 있도록 하는 배밀주사 디지털 TV의 분리 영상신호 처리회로를 제공하는데 있다.Accordingly, an object of the present invention is to provide a separate video signal processing circuit of a double-scan digital TV that receives the separated video signal output from the S-VHS VTR and the like and reproduces the original state without losing the luminance signal and the color signal.

이를 위하여 본 발명은 분리된 영상신호가 입력되는 S단자를 부착한 상태에서 S단자를 통해 입력되는 휘도신호는 통상의 영상신호를 처리계를 통해 처리하도록 하고, 색신호는 각각의 색차신호로 분리한 뒤 통상의 TV색신호와 동일한 포맷의 디지탈 신호로 합성하여 메모리에 기록되게 하며, 스위치회로를 구비하여 복합 영상신호와 분리된 영상신호가 선택적으로 처리되도록 하는 구성으로 이루어져 있다.To this end, according to the present invention, the luminance signal inputted through the S terminal in the state where the separated image signal is input to the S terminal is processed so that a normal video signal is processed through a processing system, and the color signal is separated into respective color difference signals. It is composed of a digital signal of the same format as that of a normal TV color signal and then recorded in a memory. A switch circuit is provided to selectively process a composite video signal and a separated video signal.

이하, 첨부된 제2도를 참조하여 본 발명의 분리 영상신호 처리회로를 상세히 설명하면 다음과 같다.Hereinafter, the separated image signal processing circuit of the present invention will be described in detail with reference to the accompanying FIG. 2.

제2도는 본 발명의 구성을 보인 블록도이며, 제1도와 동일한 부분에 대하여서는 동일부호를 사용하고 있다.2 is a block diagram showing the configuration of the present invention, and the same reference numerals are used for the same parts as in FIG.

이에 도시된 바와 같이, 본 발명은 아날로그/디지탈 변환기(1), 동기분리회로(2), Y/C분리회로(3), 메모리(4), 디지탈/아날로그 변환기(5), 매트릭스회로(6), 클럭발생회로(7)등으로 구성된 통상의 영상신호 처리계에 있어서, 스위칭제어신호에 따라 복합영상신호나 분리된 휘도신호를 선택하여 통상의 영상신호 처리계로 출력하는 제1스위칭회로(10)는 상기 아날로그/디지탈 변환기(1)에 접수하고, S단자를 통해 입력된 색신호(C)를 각각의 색차신호(R-Y), (B-Y)로 분리하는 색차신호분리회로(11)는 분리된 색차신호(R-Y), (B-Y)를 통상의 TV색신호와 동일한 포맷으로 합성하는 멀티플렉서(12)와, 멀티플렉싱된 색신호를 디지탈 신호로 변환하는 아날로그/디지탈 변환기(13)를 차례로 통해 스위칭제어신호에 따라 복합 영상신호에서 분리된 색신호와 S단자를 통해 입력된 색신호를 선택적으로 메모리(4)로 출력시키는 제2스위칭회로(14)에 접속하며, 상기 제2스위칭회로(14)는 동기분리회로(2)와 메모리(4)에 각각 접속하여 구성하였다.As shown therein, the present invention relates to an analog / digital converter (1), a synchronous separation circuit (2), a Y / C separation circuit (3), a memory (4), a digital / analog converter (5), a matrix circuit (6). In a conventional video signal processing system comprising a clock generation circuit (7), a first switching circuit (10) for selecting a composite video signal or a separated luminance signal according to a switching control signal and outputting the composite video signal to a normal video signal processing system (10); ) Is input to the analog-to-digital converter 1, and the color difference signal separation circuit 11 for separating the color signal C inputted through the S terminal into respective color difference signals RY and BY is separated color difference. The multiplexer 12 combines the signals RY and BY into the same format as a normal TV color signal, and then through the analog / digital converter 13 which converts the multiplexed color signal into a digital signal, in accordance with the switching control signal. Color signal separated from the video signal and input through the S terminal Connected to the second switching circuit 14 which outputs a signal to selectively memory 4, and the second switching circuit 14 was configured by connected to the sync separation circuit 2 and the memory 4.

이와같이 구성된 본 발명은 복합영상신호가 수신될 경우 스위칭제어신호에 의해 제1 및 제2 스위칭회로(10), (14)의 스위치가 모두 A측단자에 접속되므로 수신된 복합영상신호가 아날로그/디지탈 변환기(1)로 인가되어 전술된 종래의 배밀주사 TV와 동일한 작동을 하게 된다.According to the present invention configured as described above, when the composite video signal is received, the switches of the first and second switching circuits 10 and 14 are all connected to the A side terminal by the switching control signal, so that the received composite video signal is analog / digital. It is applied to the converter 1 to perform the same operation as the conventional double-tight scan TV described above.

그러나 S단자를 통해 분리된 영상신호가 입력되면 제1 및 제2스위칭회로(10), (14)의 스위치가 모두 B측단자에 접속되므로 휘도신호는 아날로그/디지탈 변환기(1)에서 디지탈신호로 변환된 후 동기분리회로(2)와 Y/C 분리회로(3)로 각각 인가되고, 동기분리회로(2)에서 수평 및 수직 동기신호가 분리되어 출력됨과 동시에, 휘도신호에 버스트 신호가 포함되어 있지 않음에 따라 색신호가 없는 휘도신호만이 Y/C 분리회로(3)로부터 출력된다.However, when the separated video signal is input through the S terminal, since the switches of the first and second switching circuits 10 and 14 are all connected to the B side terminal, the luminance signal is converted into a digital signal from the analog / digital converter 1. After conversion, it is applied to the synchronous separation circuit 2 and the Y / C separation circuit 3, respectively, and the horizontal and vertical synchronization signals are separated and output from the synchronous separation circuit 2, and a burst signal is included in the luminance signal. As a result, only luminance signals without color signals are output from the Y / C separation circuit 3.

이후의 작동은 제1도에 도시된 종래의 TV와 동일하므로 그 설명은 생략한다.Subsequent operations are the same as those of the conventional TV shown in FIG. 1, and thus description thereof is omitted.

한편, S단자를 통해 입력된 색신호는 색차신호분리회로(11)에서 각각의 색차신호(R-Y), (B-Y)로 분리되어 멀티플렉서(12)에 인가되고, 이 멀티플렉서(12)에서는 통상의 디지탈 TV의 색신호와 같은 포맷으로 각각의 색차신호(R-Y), (B-Y)를 멀티플렉싱하여 아날로그/디지탈 변환기(13)로 출력하게 되며, 아날로그/디지탈 변환기(13)에 의해 디지탈신호로 변환된 색신호가 제2스위칭회로(14)로 인가된다.On the other hand, the color signal input through the S terminal is separated into respective color difference signals RY and BY in the color difference signal separation circuit 11 and applied to the multiplexer 12. In this multiplexer 12, a normal digital TV is used. Each of the color difference signals RY and BY are multiplexed in the same format as the color signal of and output to the analog / digital converter 13, and the color signal converted into the digital signal by the analog / digital converter 13 is converted into a second signal. Is applied to the switching circuit 14.

이 제2스위칭회로(14)는 동기분리회로(2)로부터 수직동기신호가 출력되는 기간 이외의 동안에는 스위칭 제어신호에 따라 상기 색신호를 휘도신호와 함께 메모리(4)에 기록되게 하므로, S단자를 통해 입력되는 휘도신호와 색신호를 망실없이 원래의 영상신호로 재생하여 배밀주사 할 수 있게 된다.The second switching circuit 14 causes the color signal to be written to the memory 4 together with the luminance signal in accordance with the switching control signal during the period other than the period of outputting the vertical synchronization signal from the synchronization separation circuit 2. The luminance signal and the color signal inputted through the original video signal can be reproduced without loss.

이 때 수직 동기기간에는 색신호 라인을 통해 TV 조정데이타가 전송되므로 수직 동기기간에는 Y/C분리회로(3)에서 출력되는 색신호 데이타가 메모리(4)에 기록되도록 해야한다.At this time, since the TV adjustment data is transmitted through the color signal line in the vertical synchronization period, the color signal data output from the Y / C separation circuit 3 should be recorded in the memory 4 during the vertical synchronization period.

Claims (1)

배밀주사디지탈 TV의 영상신호 처리계에 있어서, 스위칭제어신호에 따라 복합 영상신호와 S단자를 통해 입력된 휘도신호를 선택적으로 통상의 아날로그/디지탈 변환기(1)로부터 출력시키는 제1스위칭회로(10)와, S단자를 통해 입력된 색신호를 각각의 색차신호(R-Y), (B-Y)로 분리하는 색차신호분리회로(11)와 분리된 색차신호를 통상의 TV색신호와 동일한 포맷으로 합성하는 멀티플렉서(12)와, 멀티플렉싱된 색신호를 디지탈 신호로 변환하는 아날로그/디지탈 변환기(13)와 스위칭제어신호 및 수직 동기신호에 따라 통상의 Y/C 분리회로(3)에서 출력된 색신호와 상기 아날로그/디지탈 변환기(13)에서 출력된 색신호를 선택적으로 메모리(4)로 출력시키는 제2스위칭회로(14)를 포함하는 것을 특징으로 하는 배밀주사 디지탈 TV의 분리 영상신호 처리회로.In a video signal processing system of a double-tight scan digital TV, a first switching circuit (10) for selectively outputting a composite video signal and a luminance signal input through an S terminal in accordance with a switching control signal from a conventional analog / digital converter (1). ), And a multiplexer which combines the color difference signal separation circuit 11 that separates the color signal input through the S terminal into respective color difference signals RY and BY, and the separated color difference signal in the same format as that of a normal TV color signal. 12) an analog / digital converter 13 for converting the multiplexed color signal into a digital signal, and a color signal output from the conventional Y / C separation circuit 3 and the analog / digital converter according to a switching control signal and a vertical synchronization signal. And a second switching circuit (14) for selectively outputting the color signal outputted from (13) to the memory (4).
KR1019870014280A 1987-12-14 1987-12-14 Separation picture image signal processing circuit of digital tv Expired KR900008891B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019870014280A KR900008891B1 (en) 1987-12-14 1987-12-14 Separation picture image signal processing circuit of digital tv

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Application Number Priority Date Filing Date Title
KR1019870014280A KR900008891B1 (en) 1987-12-14 1987-12-14 Separation picture image signal processing circuit of digital tv

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KR890011437A KR890011437A (en) 1989-08-14
KR900008891B1 true KR900008891B1 (en) 1990-12-11

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