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KR970004908A - Color correction method and apparatus for color television receiver - Google Patents

Color correction method and apparatus for color television receiver Download PDF

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Publication number
KR970004908A
KR970004908A KR1019950016894A KR19950016894A KR970004908A KR 970004908 A KR970004908 A KR 970004908A KR 1019950016894 A KR1019950016894 A KR 1019950016894A KR 19950016894 A KR19950016894 A KR 19950016894A KR 970004908 A KR970004908 A KR 970004908A
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color
signal
information
color correction
standard
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KR1019950016894A
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Korean (ko)
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KR0155435B1 (en
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이성덕
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김광호
삼성전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/68Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
    • H04N9/69Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/67Circuits for processing colour signals for matrixing

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

Abstract

본 발명은 칼라 텔레비젼 수상기의 색보정방법 및 장치에 관한 것으로 특히, 본 발명의 방법은 칼라 텔레비젼 수상기의화면조정시간이 되었는지 여부를 인지하는 제1단계; 화면조정시간이 되면 수신된 디지탈 R.G.B신호가 화면조정신호인지여부를 판단하는 제2단계; 상기 디지탈 R.G.B신호가 화면조정신호이면 상기 디지탈 R.G.B신호로부터 칼라정보 및 흑백계조정보를 검출하는 제3단계; 제3단계에서 검출된 칼라정보 및 흑백계조정보와 표준칼라정보 및 표준흑백계조정보를 비교하여 색보정계수를 생성하는 제4단계; 마이콤에 설정된 소정시간동안 제1단계에서 제3단계를 반복하여 색보정 계수를 갱신하는 제5단계; 및 제5단계의 색보정 계수를 입력하여 수신된 디지탈 R.G.B 신호의 색상을 보정하는 제6단계를 포함한것을 특징으로 한다.The present invention relates to a color correction method and apparatus for a color television receiver, and in particular, the method of the present invention includes a first step of recognizing whether or not the screen adjustment time of the color television receiver has been reached; A second step of determining whether the received digital R.G.B signal is a screen adjustment signal when the screen adjustment time is reached; A third step of detecting color information and gray scale information from the digital R.G.B signal if the digital R.G.B signal is a screen adjustment signal; A fourth step of generating a color correction coefficient by comparing the color information and the black and white tone information detected in the third step with the standard color information and the standard black and white tone information; A fifth step of updating the color correction coefficient by repeating the first step to the third step for a predetermined time set in the microcomputer; And a sixth step of correcting the color of the received digital R.G.B signal by inputting the color correction coefficient of the fifth step.

따라서, 본 발명은 칼라 텔레비젼 수신기의 특성과 칼라 텔레비젼 CRT의 특성을 측색적인 방법을 사용하여 보상함으로써,방송국에서 송신한 원화상에 가까운 칼라영상을 재현할 수 있다.Therefore, the present invention can reproduce the color image close to the original image transmitted from the broadcasting station by compensating the characteristics of the color television receiver and the characteristics of the color television CRT using a colorimetric method.

Description

칼라 텔레비젼 수상기의 색보정방법 및 장치Color correction method and apparatus for color television receiver

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

제2도는 칼라 텔레비젼 수상기에서 올바른 색재현을 설명하기 위한 개념도, 제3A도는 본 발명에 의한 칼라 텔레비젼 수상기의 색보정을 설명하기 위한 개념도, 제3B도는 상기 제3A도에 도시된 텔레비젼수신기 특성보정단의 가능을 설명하기 위한 도면, 제3C도는 상기 제3A도에 도시한 CRT 특성보정단의 기능을 설명하기 위한 도면, 제4A도는 칼라 텔레비젼 수상기의 화면조정 시간에 사용하는 테스트 영상의 일부분을 나타낸 도면, 제4B도는 본 발명에 색보정장치의 블럭도, 제4C도는 상기 제4B도에 도시한 색보정부의 상세블럭도.FIG. 2 is a conceptual diagram for explaining correct color reproduction in a color television receiver, FIG. 3A is a conceptual diagram for explaining color correction of a color television receiver according to the present invention, and FIG. 3B is a television receiver characteristic correction stage shown in FIG. 3C is a view for explaining the function of the CRT characteristic correction stage shown in FIG. 3A, and FIG. 4A is a view showing a part of a test image used for screen adjustment time of a color television receiver. 4B is a block diagram of a color correction device according to the present invention, and FIG. 4C is a detailed block diagram of the color correction unit shown in FIG. 4B.

Claims (6)

화면조정시간에 방송되는 표준테스트영상 전체를 저장하고 있는 메모리와, 상기 표준테스트영상중 표준칼라정보와 표준흑백계조정보에 관한 색값을 저장하는 메모리와, 화면조정시간에 입력된 테스트영상중 칼라정보 및 흑백계조정보를 일시적으로 저장하는 메모리를 갖는 마이콤을 구비한 칼라 텔레비젼 수상기의 색보정방법에 있어서, 상기 칼라텔레비젼 수상기의 화면조정시간이 되었는지 여부를 판단하는 제1단계; 화면조정시간이 되면 상기 화면조정신호의 디지탈R.G.B신호와 상기 표준테스트영상신호를 비교하여, 상기 입력된 디지탈 R.G.B신호가 화면조정신호인지 여부를 판단하는제2단계; 상기 디지탈 R.G.B신호가 화면조정신호이면 상기 디지탈 R.G.B신호로부터 칼라정보 및 흑백계조정보를 검출하는제3단계; 상기 제3단계에서 검출된 칼라정보 및 흑백계조정보와 상기 표준칼라정보 및 표준흑백계조정보를 비교하여 색차를 구하고, 이에 근거하여 색보정계수를 생성하는 제4단계; 상기 마이콤에 설정된 소정시간동안 상기 제1단계에서 상기제3단계를 반복하여 상기 색보정 계수를 갱신하는 제5단계; 및 상기 제5단계의 색보정 계수를 입력하여 상기 정규방송신호의 디지탈 R.G.B 신호의 색상을 보정하는 제6단계를 포함한 것을 특징으로 하는 칼라 텔레비젼 수상기의 색보정방법.A memory that stores the entirety of the standard test image broadcast during the screen adjustment time, a memory for storing the color values of the standard color information and the standard gray scale information among the standard test images, and the color information of the test images input during the screen adjustment time And a color correction method for a color television receiver having a microcomputer having a memory for temporarily storing black and white tone information, the color correction method comprising: a first step of determining whether or not a screen adjustment time of the color television receiver has been reached; A second step of determining whether the input digital R.G.B signal is a screen adjustment signal by comparing the digital R.G.B signal of the screen adjustment signal with the standard test video signal when the screen adjustment time is reached; A third step of detecting color information and grayscale information from the digital R.G.B signal if the digital R.G.B signal is a screen adjustment signal; A fourth step of obtaining a color difference by comparing the color information and the grayscale information detected in the third step with the standard color information and the standard grayscale information, and generating a color correction coefficient based on the color difference; A fifth step of updating the color correction coefficient by repeating the third step to the third step for a predetermined time set in the microcomputer; And a sixth step of correcting the color of the digital R.G.B signal of the regular broadcast signal by inputting the color correction coefficient of the fifth step. 제1항에 있어서, 상기 제4단계의 색보정 계수는 NTSC RGB 색역을 커버하는 다수개의 샘플색들을 텔레비젼수신기에 인가하여 선형화된 신호를 측정하고, 상기 선형화된 신호의 색값을 표준 색공간으로 좌표변환하여 CRT에서 측색된 색값과 표준색값의 관계를 회귀분석법을 사용하여 구하는 것을 특징으로 하는 칼라 텔레비젼 수상기의 색보정방법.The color correction coefficient of claim 4, wherein the color correction coefficients of the fourth step are applied to a television receiver to apply a plurality of sample colors covering the NTSC RGB color gamut to measure a linearized signal, and coordinate the color values of the linearized signal into a standard color space. A color correction method for a color television receiver, characterized in that the conversion is performed to obtain a relationship between a color value measured by a CRT and a standard color value using a regression analysis method. 시스템클럭발생부, 상기 시스템클럭발생부의 출력에 따라 작동하는 타이머, 상기 타이머의 시간을 입력하여 소정시간이 되면 텔레비젼 영상신호를 수신하기 위한 회로들을 작동시키는 마이콤 및 휘도신호와 색차신호를 입력하여아날로그 R.G.B신호를 출력하는 매트릭스 연산부를 구비한 칼라 텔레비젼 수상기의 색보정장치에 있어서, 소정의 제어신호를 입력하여 상기 매트릭스 연산부에서 출력된 아날로그 R.G.B신호를 절환하는 입력신호 절환부; 화면조정시간이 되면상기 매트릭스 연산부에서 출력된 화면조정신호의 아날로그 R.G.B신호를 디지탈 R.G.B신호로 변환하여 중앙처리부로 출력하는 A/D변환부; 화면조정시간에 사용하는 표준테스트영상의 전체를 저장하는 테스트영상메모리; 상기 표준테스트영상 중에서 표준칼라정보와 표준흑백계조정보에 관한 색값 및 색변환 계수들의 디폴트 값들을 저장하는 기준버퍼; 상기 타이머의 시간을 입력하여 상기 입력신호 절환부를 제어하기 위한 신호를 출력하며, 상기 A/D변환부의 출력과 상기 기준버퍼에저장된 표준칼라정보 및 표준흑백계조정보를 비교하여 색보정 계수를 생성하는 중앙처리부; 텔레비젼화면 조정시간에 입력된 테스트 영상중에서 칼라정보와 흑백계조정보를 일시적으로 저장하며, 상기 중앙처리장치에서 계산한 색보정 계수를업데이트 하는 임시저장버퍼; 상기 임시저장버퍼에 저장된 색보정 계수를 입력하여 디지탈 신호를 아날로그 신호로 변환하는 D/A변환부; 및 상기 중앙제어부의 제어에 따라서, 상기 입력신호 절환부에서 출력된 아날로그 R.G.B신호와 상기 D/A변환부에서 출력된 색보정 계수를 입력하여 색상을 보정하는 색보정부를 포함하는 것을 특징으로 하는 칼라 텔레비젼 수상기의 색보정장치.A system clock generator, a timer that operates according to the output of the system clock generator, inputs a time of the timer, inputs a microcomputer and a luminance signal and a color difference signal to operate circuits for receiving a television video signal when a predetermined time is input. A color correction apparatus for a color television receiver having a matrix calculator for outputting an RGB signal, comprising: an input signal switch for inputting a predetermined control signal to switch the analog RGB signal output from the matrix calculator; An A / D conversion unit converting an analog R.G.B signal of the screen adjustment signal output from the matrix calculation unit into a digital R.G.B signal and outputting it to a central processing unit when the screen adjustment time comes; A test image memory for storing the entirety of the standard test image used for the screen adjustment time; A reference buffer which stores default values of color values and color conversion coefficients related to standard color information and standard gray scale information among the standard test images; A signal for controlling the input signal switching unit is output by inputting the time of the timer, and a color correction coefficient is generated by comparing the output of the A / D conversion unit with the standard color information and the standard gray scale information stored in the reference buffer. A central processing unit; A temporary storage buffer that temporarily stores color information and black and white tone information in the test image input at the time of adjusting the television screen, and updates the color correction coefficient calculated by the central processing unit; A D / A converter for converting a digital signal into an analog signal by inputting a color correction coefficient stored in the temporary storage buffer; And a color compensator for correcting color by inputting an analog RGB signal output from the input signal switching unit and a color correction coefficient output from the D / A converter according to the control of the central controller. Color correction device for television receiver. 제3항에 있어서, 상기 중앙처리부는 화면조정이 시작되는 시간과 완료되는 시간을 인식하여 텔레비젼 영상신호를 수신하기 위해 사용하는 회로들을 작동시키며, 상기 회로들의 신호 흐름을 제어하는 것을 특징으로 하는 칼라 텔레비젼 수상기의 색보정장치.The color processor of claim 3, wherein the central processing unit operates circuits used to receive a television video signal by recognizing a start time and a completion time of screen adjustment, and control a signal flow of the circuits. Color correction device for television receiver. 제3항에 있어서, 상기 임시저장버퍼에 기록되는 색보정 계수는 상기 정규방송신호에 대해 비선형 성분을제거하기 위한 선형화 계수와, 상기 비선형 성분이 제거된 영상신호의 디지탈 R.G.B신호를 CRT의 고유색신호로 변환하기위한 색공간 변환계수를 포함한 것을 특징으로 하는 칼라 텔레비젼 수상기의 색보정장치.The color correction coefficient of claim 3, wherein the color correction coefficient recorded in the temporary storage buffer includes a linearization coefficient for removing the nonlinear components with respect to the normal broadcast signal, and a digital RGB signal of the video signal from which the nonlinear components are removed. Color correction apparatus for a color television receiver comprising a color space conversion coefficient for converting the signal into a digital video receiver. 제4항에 있어서, 상기 색보정부는 상기 D/A변환부에서 출력된 R.G.B신호와 상기 색보정 계수를 입력하여비선형 성분을 제거하는 선형단과, 상기 선형화단에서 처리된 디지탈 R.G.B신호를 CRT 고유 색공간의 색신호로 변환하는색공간변환단과, CRT 고유 감마값에 해당하는 비선형 특성을 발생시키는 CRT 감마특성 보정단을 포함한 것을 특징으로 하는 칼라 텔레비젼 수상기의 색보정장치.The color correcting unit of claim 4, wherein the color compensator is configured to input a RGB signal output from the D / A converter and the color correction coefficient to remove a nonlinear component, and to convert a digital RGB signal processed by the linearization stage into a CRT intrinsic color. And a CRT gamma characteristic correction stage for generating a nonlinear characteristic corresponding to a CRT intrinsic gamma value. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950016894A 1995-06-22 1995-06-22 Color compensating method for tv set and apparatus thereof KR0155435B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100384974B1 (en) * 2002-06-28 2003-05-22 Seung Hyun Oh Display color correction pattern and display color correction method using the same
KR100424312B1 (en) * 2001-12-17 2004-03-24 엘지전자 주식회사 Image Detecting Device and Offset Deciding Method for the Same
KR100591857B1 (en) * 2004-06-04 2006-06-23 한국유나이티드제약 주식회사 Pharmaceutical composition containing ramipril which has improved stability

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100447188B1 (en) * 2002-03-22 2004-09-04 엘지전자 주식회사 Gamma Correction Device of display device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100424312B1 (en) * 2001-12-17 2004-03-24 엘지전자 주식회사 Image Detecting Device and Offset Deciding Method for the Same
KR100384974B1 (en) * 2002-06-28 2003-05-22 Seung Hyun Oh Display color correction pattern and display color correction method using the same
KR100591857B1 (en) * 2004-06-04 2006-06-23 한국유나이티드제약 주식회사 Pharmaceutical composition containing ramipril which has improved stability

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