ES2064620T3 - Aparato para controlar digitalmente el valor de c.c. de una señal tratada. - Google Patents

Aparato para controlar digitalmente el valor de c.c. de una señal tratada.

Info

Publication number
ES2064620T3
ES2064620T3 ES90303927T ES90303927T ES2064620T3 ES 2064620 T3 ES2064620 T3 ES 2064620T3 ES 90303927 T ES90303927 T ES 90303927T ES 90303927 T ES90303927 T ES 90303927T ES 2064620 T3 ES2064620 T3 ES 2064620T3
Authority
ES
Spain
Prior art keywords
digital
analog converter
signal
capacitor
coupled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES90303927T
Other languages
English (en)
Inventor
Barth Alan Canfield
Russell Thomas Fling
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Technicolor USA Inc
Original Assignee
Thomson Consumer Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Application granted granted Critical
Publication of ES2064620T3 publication Critical patent/ES2064620T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/16—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level
    • H04N5/18—Circuitry for reinsertion of DC and slowly varying components of signal; Circuitry for preservation of black or white level by means of "clamp" circuit operated by switching circuit
    • 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
    • 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
    • H04N5/57—Control of contrast or brightness

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Analogue/Digital Conversion (AREA)
  • Picture Signal Circuits (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Color Television Systems (AREA)
  • Television Receiver Circuits (AREA)
  • Feedback Control In General (AREA)
  • Stereophonic System (AREA)

Abstract

UN SISTEMA DE CONTROL DE D.C. DIGITAL INCLUYE UN MULTIPLEXOR (22), UN CONVERTIDOR DE DIGITAL A ANALOGICO (24), UN CONDENSADOR (30), CIRCUITERIA GENERADORA DE DESPLAZAMIENTO (26,27,28) Y CIRCUITERIA DE FIJACION (33,34 O 42,44,46). UNA SEÑAL DIGITAL (DESDE 20) QUE SE VA A CONTROLAR SU D.C. Y UNA SEÑAL DE CONTROL DE BRILLO DIGITAL (DESDE 16) SE ACOPLAN ALTERNATIVAMENTE MEDIANTE EL MULTIPLEXOR A LA ENTRADA DEL CONVERTIDOR DE DIGITAL A ANALOGICO. LA SALIDA DEL CONVERTIDOR DIGITAL A ANALOGICO SE ACOPLA A UN TERMINAL DE SALIDA DEL SISTEMA POR MEDIO DEL CONDENSADOR. CUANDO SE APLICA LA SEÑAL AL CONVERTIDOR DE DIGITAL A ANALOGICO SE APLICA UNA DESVIACION DEL D.C. FIJADO A LA INTERCONEXION DEL CONVERTIDOR Y DEL CONDENSADOR. DURANTE LOS INTERVALOS PRESELECCIONADOS EL VALOR DE CONTROL DE D.C. SE ACOPLA AL CONVERTIDOR DE DIGITAL A ANALOGICO AL MISMO TIEMPO QUE EL TERMINAL DE SALIDA DEL SISTEMA SE FIJA (A TRAVES DE 33 O 44) A UNA REFERENCIA FIJADA Y LA CIRCUITERIA DE DESVIACION DEL D.C. SE INHABILITA (EN27). ESTA COMBINACION DE APARATOS PERMITE CONTROLAR EL NIVEL DE D.C. DE UNA SEÑAL PROCESADA DIGITALMENTE SIN AFECTAR EL RANGO DINAMICO DE LA SEÑAL DIGITAL.
ES90303927T 1989-04-12 1990-04-11 Aparato para controlar digitalmente el valor de c.c. de una señal tratada. Expired - Lifetime ES2064620T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/335,195 US4965669A (en) 1989-04-12 1989-04-12 Apparatus for digitally controlling the D.C. value of a processed signal

Publications (1)

Publication Number Publication Date
ES2064620T3 true ES2064620T3 (es) 1995-02-01

Family

ID=23310687

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90303927T Expired - Lifetime ES2064620T3 (es) 1989-04-12 1990-04-11 Aparato para controlar digitalmente el valor de c.c. de una señal tratada.

Country Status (10)

Country Link
US (1) US4965669A (es)
EP (1) EP0392833B1 (es)
JP (1) JP2582307B2 (es)
KR (1) KR930002145B1 (es)
CN (1) CN1024244C (es)
CA (1) CA2013342A1 (es)
DE (1) DE69014229T2 (es)
ES (1) ES2064620T3 (es)
FI (1) FI95336C (es)
MY (1) MY105531A (es)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5130800A (en) * 1989-12-28 1992-07-14 North American Philips Corporation Picture out of picture feature for wide-screen display
JP3143117B2 (ja) * 1990-09-25 2001-03-07 キヤノン株式会社 信号処理装置
US5202765A (en) * 1991-05-06 1993-04-13 Thomson Consumer Electronics, Inc. Television receiver with picture in picture and non-linear processing
EP0523299A1 (en) * 1991-07-18 1993-01-20 International Business Machines Corporation System and method for combining multiple composite video signals
KR930007260A (ko) * 1991-09-16 1993-04-22 강진구 Tv/ttx 콘트라스트 및 브라이트 공통 제어방법 및 회로
FI95853C (fi) * 1991-11-08 1996-03-25 Nokia Mobile Phones Ltd Menetelmä D/A-muuntimen offset-jännitteiden vaihteluiden vaikutuksen korjaamiseksi muuntimen lähtöjännitteestä
US5343255A (en) * 1992-09-17 1994-08-30 Thomson Consumer Electronics, Inc. Video processing circuit with IF AGC loop, auxiliary video clamp and shared reference voltage source formed on common integrated circuit
US5361101A (en) * 1993-11-19 1994-11-01 Zenith Electronics Corporation Preamplifier for multimedia display
JPH07264503A (ja) * 1994-03-23 1995-10-13 Toshiba Corp テレビジョン受像機
KR0144260B1 (ko) * 1994-11-15 1998-07-15 구자홍 피아이피 기능의 에이치디티브이
US5841488A (en) * 1995-12-28 1998-11-24 Thomson Consumer Electronics, Inc. Multiple video input clamping arrangement
US5767921A (en) * 1996-05-06 1998-06-16 Winbond Electronics Corp. Method and apparatus for gradually adjusting color components of digital video data
US6141064A (en) * 1997-05-08 2000-10-31 Sony Corporation Luminance signal generation circuit with single clamp in closed loop configuration
US5999221A (en) * 1997-05-08 1999-12-07 Sony Corporation Horizontal synchronization pulse generation circuit
US5864371A (en) * 1997-05-08 1999-01-26 Sony Corporation Luminance signal generation circuit with single clamp in closed loop configuration and horizontal synchronization pulse generation
JP2003304560A (ja) * 2002-04-10 2003-10-24 Sony Corp デジタルビデオエンコーダ
US8233529B2 (en) * 2008-08-14 2012-07-31 Mediatek Inc. Video decoder

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955047A (en) * 1974-04-16 1976-05-04 Rca Corporation D.C. reinsertion in video amplifier
JPS5754983B2 (es) * 1974-04-19 1982-11-20
NL7901722A (nl) * 1979-03-05 1980-09-09 Philips Nv Klemschakeling voor een videosignaal.
JPS5676691A (en) * 1979-11-28 1981-06-24 Hitachi Ltd Television receiver with plurality of screen display
JPS5767380A (en) * 1980-10-15 1982-04-23 Alps Electric Co Ltd Video clamping circuit
DE3214756C2 (de) * 1981-05-02 1991-10-17 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zum Ermitteln des Wertes eines Referenzpegels
JPS58178670A (ja) * 1982-04-12 1983-10-19 Alps Electric Co Ltd ビデオ・クランプ回路
US4742392A (en) * 1983-08-04 1988-05-03 Canon Kabushiki Kaisha Clamp circuit with feed back
US4718119A (en) * 1984-08-27 1988-01-05 Motorola Inc. AGC circuit including a precision voltage clamp and method
KR900002645B1 (ko) * 1985-03-27 1990-04-21 가부시기가이샤 히다찌세이사꾸쇼 크람푸 회로
US4729026A (en) * 1985-05-21 1988-03-01 Citizen Watch Co., Ltd. Auto-pedestal level clamp circuit
US4660084A (en) * 1985-09-25 1987-04-21 Rca Corporation Television receiver with selectable video input signals
US4660085A (en) * 1985-09-25 1987-04-21 Rca Corporation Television receiver responsive to plural video signals
JPH0797830B2 (ja) * 1986-04-08 1995-10-18 ソニー株式会社 ビデオカメラの黒レベル補正回路
US4707741A (en) * 1986-04-11 1987-11-17 Harris Corporation Video signal clamping with clamp pulse width variation with noise
US4663668A (en) * 1986-06-12 1987-05-05 Rca Corporation Brightness clamping apparatus for TV receiver with multiple inputs
JPS63160469A (ja) * 1986-12-23 1988-07-04 Mitsubishi Electric Corp クランプ回路
JPS63185172A (ja) * 1987-01-27 1988-07-30 Matsushita Electric Ind Co Ltd テレビジヨン受像機

Also Published As

Publication number Publication date
FI95336C (fi) 1996-01-10
CN1024244C (zh) 1994-04-13
EP0392833A1 (en) 1990-10-17
DE69014229T2 (de) 1995-05-18
KR900017416A (ko) 1990-11-16
EP0392833B1 (en) 1994-11-23
DE69014229D1 (de) 1995-01-05
CA2013342A1 (en) 1990-10-12
US4965669A (en) 1990-10-23
MY105531A (en) 1994-10-30
JP2582307B2 (ja) 1997-02-19
FI901728A0 (fi) 1990-04-05
KR930002145B1 (ko) 1993-03-26
CN1047948A (zh) 1990-12-19
JPH02295226A (ja) 1990-12-06
FI95336B (fi) 1995-09-29

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