ES2157892T3 - Procesador de señales de luminancia no lineales, sensible al nivel medio de imagen (apl) de una imagen presentada. - Google Patents
Procesador de señales de luminancia no lineales, sensible al nivel medio de imagen (apl) de una imagen presentada.Info
- Publication number
- ES2157892T3 ES2157892T3 ES92115813T ES92115813T ES2157892T3 ES 2157892 T3 ES2157892 T3 ES 2157892T3 ES 92115813 T ES92115813 T ES 92115813T ES 92115813 T ES92115813 T ES 92115813T ES 2157892 T3 ES2157892 T3 ES 2157892T3
- Authority
- ES
- Spain
- Prior art keywords
- signal
- video output
- image
- signal processor
- apl
- 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
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
-
- 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)
- Television Receiver Circuits (AREA)
- Picture Signal Circuits (AREA)
- Processing Of Color Television Signals (AREA)
Abstract
UN PROCESADOR DE SEÑALES (43,44) QUE RESPONDE A UNA SEÑAL DE ENTRADA DE VIDEO (Y1) Y PROPORCIONA UNA PRIMERA SEÑAL DE SALIDA DE VIDEO (Y4) LINEALMENTE RELACIONADA CON LA SEÑAL DE ENTRADA Y UNA SEGUNDA SEÑAL DE SALIDA DE VIDEO (Y5) NO RELACIONADA LINEALMENTE CON LA SEÑAL DE ENTRADA DE VIDEO. UN PRIMER CIRCUITO COMBINADOR (45) COMBINA LA PRIMERA Y LA SEGUNDA SEÑALES DE SALIDA DE VIDEO SEGUN UNAS PROPORCIONES PREDETERMINADAS PARA PROPORCIONAR UNA TERCERA SEÑAL DE SALIDA DE VIDEO (Y6) CON COMPONENTES TANTO LINEALES COMO NO LINEALES. UN SEGUNDO ELEMENTO COMBINADOR (46) COMBINA LA SEGUNDA Y LA TERCERA SEÑALES DE SALIDA DE VIDEO SEGUN UNAS PROPORCIONES DETERMINADAS POR UNA SEÑAL DE CONTROL REPRESENTATIVA DEL NIVEL DE LA SEÑAL DE IMAGEN (VC) PARA PROPORCIONAR UNA SEÑAL DE SALIDA DE VIDEO PROCESADA CON UN MAYOR CONTRASTE PARA TODOS LOS VALORES DEL NIVEL MEDIO DE LA SEÑAL DE IMAGEN DE LAS IMAGENES REPRESENTADAS.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/808,327 US5162902A (en) | 1991-12-16 | 1991-12-16 | Non-linear luminance signal processor responsive to average picture level (APL) of displayed image |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2157892T3 true ES2157892T3 (es) | 2001-09-01 |
Family
ID=25198471
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES92115813T Expired - Lifetime ES2157892T3 (es) | 1991-12-16 | 1992-09-16 | Procesador de señales de luminancia no lineales, sensible al nivel medio de imagen (apl) de una imagen presentada. |
Country Status (11)
Country | Link |
---|---|
US (1) | US5162902A (es) |
EP (1) | EP0547302B1 (es) |
JP (1) | JP2929053B2 (es) |
KR (1) | KR100256885B1 (es) |
CN (1) | CN1038093C (es) |
CA (1) | CA2076081C (es) |
DE (1) | DE69231897T2 (es) |
ES (1) | ES2157892T3 (es) |
MY (1) | MY108832A (es) |
PT (1) | PT547302E (es) |
SG (1) | SG55016A1 (es) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100202344B1 (ko) * | 1990-03-26 | 1999-06-15 | 이데이 노부유끼 | 자동니제어회로 |
JP2764761B2 (ja) * | 1990-07-19 | 1998-06-11 | 松下電器産業株式会社 | 映像信号平均輝度レベル検出装置 |
US5391944A (en) * | 1992-01-22 | 1995-02-21 | Matsushita Electric Industrial Co., Ltd. | Image-tone control circuit and gradient adjusting circuit therefor |
TW269766B (es) * | 1993-02-05 | 1996-02-01 | Thomson Consumer Electronics | |
US5453798A (en) * | 1993-02-05 | 1995-09-26 | Thomson Consumer Electronics, Inc. | Black compensation circuit for a video display system |
KR0149737B1 (ko) * | 1993-07-20 | 1998-10-15 | 사토 후미오 | 고체촬상장치 |
EP0647062B1 (en) * | 1993-09-30 | 1998-08-05 | STMicroelectronics S.r.l. | Filter architecture, particularly for video applications |
US5651078A (en) * | 1994-07-18 | 1997-07-22 | Thomson Consumer Electronics, Inc. | Method and apparatus for reducing contouring in video compression |
US5539459A (en) * | 1995-05-18 | 1996-07-23 | Polaroid Corporation | Optimal tone scale mapping in electronic cameras |
FI104521B (fi) * | 1997-01-30 | 2000-02-15 | Nokia Multimedia Network Termi | Menetelmä kuvasekvenssien kontrastin parantamiseksi |
EP0963111A1 (en) * | 1998-06-02 | 1999-12-08 | Deutsche Thomson-Brandt Gmbh | Method and apparatus for dynamic contrast improvement in video pictures |
KR100346840B1 (ko) * | 1999-11-04 | 2002-08-03 | 삼성전자 주식회사 | 화면의 펄럭거림을 최소화하는 흑신장 장치 및 그 방법 |
EP1446944A4 (en) * | 2001-11-01 | 2005-01-12 | Thomson Licensing Sa | METHOD FOR ENHANCING THE DYNAMIC CONTRAST |
AU2003278476A1 (en) * | 2002-12-06 | 2004-06-30 | Koninklijke Philips Electronics N.V. | Gamma correction |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4507615A (en) * | 1982-12-16 | 1985-03-26 | Tektronix, Inc. | Non-linear amplifier systems |
US4599643A (en) * | 1983-12-29 | 1986-07-08 | Rca Corporation | Apparatus responsive to plural color video signals for amplitude limiting the video signals to assist beam current limiting |
US4663667A (en) * | 1985-11-25 | 1987-05-05 | Polaroid Corporation | Contrast control circuit |
US4829381A (en) * | 1988-04-18 | 1989-05-09 | Polaroid Corporation | System and method for electronic image enhancement by dynamic pixel transformation |
US4975773A (en) * | 1989-03-31 | 1990-12-04 | Zenith Electronics Corporation | Dynamic range video black level expander |
US4980756A (en) * | 1989-08-25 | 1990-12-25 | Rca Licensing Corporation | Control signal generator for a television system |
US5099154A (en) * | 1989-08-25 | 1992-03-24 | Thomson Consumer Electronics, Inc. | Amplifier arrangement for producing a controllable non-linear transfer characteristic useful for improving the contrast of an image |
US5003394A (en) * | 1989-08-25 | 1991-03-26 | Rca Licensing Corporation | Dynamic video system including automatic contrast and "white-stretch" processing sections |
US5047861A (en) * | 1990-07-31 | 1991-09-10 | Eastman Kodak Company | Method and apparatus for pixel non-uniformity correction |
-
1991
- 1991-12-16 US US07/808,327 patent/US5162902A/en not_active Expired - Lifetime
-
1992
- 1992-08-13 CA CA002076081A patent/CA2076081C/en not_active Expired - Fee Related
- 1992-08-28 MY MYPI9201561 patent/MY108832A/xx unknown
- 1992-09-16 EP EP92115813A patent/EP0547302B1/en not_active Expired - Lifetime
- 1992-09-16 SG SG1996002419A patent/SG55016A1/en unknown
- 1992-09-16 PT PT92115813T patent/PT547302E/pt unknown
- 1992-09-16 ES ES92115813T patent/ES2157892T3/es not_active Expired - Lifetime
- 1992-09-16 DE DE69231897T patent/DE69231897T2/de not_active Expired - Lifetime
- 1992-09-24 KR KR1019920017496A patent/KR100256885B1/ko not_active IP Right Cessation
- 1992-09-24 CN CN92112061A patent/CN1038093C/zh not_active Expired - Fee Related
- 1992-09-24 JP JP4310746A patent/JP2929053B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0547302B1 (en) | 2001-06-27 |
JPH05252464A (ja) | 1993-09-28 |
CA2076081A1 (en) | 1993-06-07 |
EP0547302A3 (en) | 1993-08-11 |
CN1038093C (zh) | 1998-04-15 |
SG55016A1 (en) | 1998-12-21 |
DE69231897T2 (de) | 2001-10-04 |
CA2076081C (en) | 1998-12-08 |
JP2929053B2 (ja) | 1999-08-03 |
KR930015649A (ko) | 1993-07-24 |
PT547302E (pt) | 2001-12-28 |
US5162902A (en) | 1992-11-10 |
CN1073819A (zh) | 1993-06-30 |
MY108832A (en) | 1996-11-30 |
DE69231897D1 (de) | 2001-08-02 |
KR100256885B1 (ko) | 2000-05-15 |
EP0547302A2 (en) | 1993-06-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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