ES2180551T3 - Tratamiento no lineal de señales de video. - Google Patents

Tratamiento no lineal de señales de video.

Info

Publication number
ES2180551T3
ES2180551T3 ES94105302T ES94105302T ES2180551T3 ES 2180551 T3 ES2180551 T3 ES 2180551T3 ES 94105302 T ES94105302 T ES 94105302T ES 94105302 T ES94105302 T ES 94105302T ES 2180551 T3 ES2180551 T3 ES 2180551T3
Authority
ES
Spain
Prior art keywords
signal
video signal
detail
input
video
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
ES94105302T
Other languages
English (en)
Inventor
Anton Werner Keller
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.)
RCA Licensing Corp
Original Assignee
RCA Licensing Corp
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 RCA Licensing Corp filed Critical RCA Licensing Corp
Application granted granted Critical
Publication of ES2180551T3 publication Critical patent/ES2180551T3/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
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/202—Gamma control
    • 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
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/205—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic
    • H04N5/208—Circuitry for controlling amplitude response for correcting amplitude versus frequency characteristic for compensating for attenuation of high frequency components, e.g. crispening, aperture distortion correction
    • 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
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
    • H04N9/69—Circuits 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)

Abstract

UNA ENTRADA DE SEÑAL DE VIDEO (IN) SE APLICA A UN ATENUADOR PUENTEADO EN FORMA DE T (R1,R2,R3,20) QUE INCLUYE UN ELEMENTO NO LINEAL (20) EN LA RAMA DERIVADA CONSIGUIENTE QUE PROPORCIONA ATENUACION CRECIENTE CUANDO LA SEÑAL DE ENTRADA CRECE PARA ASI PRODUCIR UNA SEÑAL DE VIDEO GAMMA CORREGIDA EN LA SALIDA DEL ATENUADOR. UN SENSOR DE CORRIENTE EN LA RAMA DERIVADA GENERA UNA SEÑAL DE DETALLE EXPONENCIAL CRECIENTE (S3) PARA AUMENTOS EN LA ENTRADA DE SEÑAL DE VIDEO. LA SEÑAL DE DETALLE ES FILTRADA (24) Y COMBINADA CON LA SEÑAL GAMMA CORREGIDA (S7) POR UN CIRCUITO DE RESUMEN (18) PARA PROPORCIONAR UNA SEÑAL DE SALIDA DE VIDEO (OUT) QUE TIENE CORRECCION GAMMA Y ALTA FRECUENCIA DE AUMENTO DE DETALLE.
ES94105302T 1993-04-14 1994-04-06 Tratamiento no lineal de señales de video. Expired - Lifetime ES2180551T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/048,649 US5349389A (en) 1993-04-14 1993-04-14 Video attenuator with output combined with signal from non-linear shunt branch to provide gamma correction and high frequency detail enhancement

Publications (1)

Publication Number Publication Date
ES2180551T3 true ES2180551T3 (es) 2003-02-16

Family

ID=21955685

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94105302T Expired - Lifetime ES2180551T3 (es) 1993-04-14 1994-04-06 Tratamiento no lineal de señales de video.

Country Status (9)

Country Link
US (1) US5349389A (es)
EP (1) EP0620679B1 (es)
JP (1) JP3498995B2 (es)
KR (1) KR100288805B1 (es)
CN (1) CN1064508C (es)
DE (1) DE69431138T2 (es)
ES (1) ES2180551T3 (es)
SG (1) SG93771A1 (es)
TR (1) TR27890A (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5828330A (en) * 1997-03-19 1998-10-27 Exar Corporation Analog to digital converter having dynamically controlled non-linear output
US6636265B1 (en) 2000-01-21 2003-10-21 Thomson Licensing S.A. Focus flutter prevention in TV receivers and monitors
AU2003274986A1 (en) * 2002-09-21 2004-04-08 Randy Burnworth Method and module system apparatus for improving video
JP2008500572A (ja) * 2004-05-25 2008-01-10 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 電界発光表示装置の駆動
KR20070079224A (ko) * 2006-02-01 2007-08-06 삼성전자주식회사 코어링 장치 및 이를 이용하는 휘도 처리 프로세서와 그방법
US9728155B2 (en) * 2011-02-25 2017-08-08 Maxim Integrated Products, Inc. Gamma switching amplifier
US9112457B1 (en) 2013-01-29 2015-08-18 Teledyne Lecroy, Inc. Decompressor

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE565503A (es) * 1957-03-09
US3588338A (en) * 1969-03-21 1971-06-28 Rca Corp Gamma correction and shading modulation circuitry for a television camera
US3970774A (en) * 1975-03-31 1976-07-20 Rca Corporation Electronic signal mixer
US4057828A (en) * 1975-11-17 1977-11-08 Harris Corporation Contrast compression circuits
JPS5925510B2 (ja) * 1976-10-14 1984-06-18 松下電器産業株式会社 ガンマ調整装置
JPS5726970A (en) * 1980-07-24 1982-02-13 Sony Corp Image sensor
JPS58130676A (ja) * 1982-01-29 1983-08-04 Toshiba Corp ガンマ補正回路
GB8925438D0 (en) * 1989-11-10 1989-12-28 Rca Licensing Corp Non-linear rgb video signal processing
CA2027337C (en) * 1989-11-10 2001-04-24 Peter Eduard Haferl Nonlinear rgb video signal processing
JPH03214973A (ja) * 1990-01-19 1991-09-20 Fujitsu General Ltd アパーチャ補償回路

Also Published As

Publication number Publication date
DE69431138T2 (de) 2003-01-02
KR100288805B1 (ko) 2001-05-02
EP0620679A1 (en) 1994-10-19
TR27890A (tr) 1995-10-11
CN1101198A (zh) 1995-04-05
JPH06311395A (ja) 1994-11-04
EP0620679B1 (en) 2002-08-07
CN1064508C (zh) 2001-04-11
KR940025349A (ko) 1994-11-19
JP3498995B2 (ja) 2004-02-23
DE69431138D1 (de) 2002-09-12
SG93771A1 (en) 2003-01-21
US5349389A (en) 1994-09-20

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