WO2004017286A3 - Video circuit - Google Patents

Video circuit Download PDF

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Publication number
WO2004017286A3
WO2004017286A3 PCT/IB2003/003312 IB0303312W WO2004017286A3 WO 2004017286 A3 WO2004017286 A3 WO 2004017286A3 IB 0303312 W IB0303312 W IB 0303312W WO 2004017286 A3 WO2004017286 A3 WO 2004017286A3
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
quantizer
video circuit
video
replaces
Prior art date
Application number
PCT/IB2003/003312
Other languages
French (fr)
Other versions
WO2004017286A2 (en
Inventor
Rob A Beuker
Greef Petrus M De
Robert Koffrie
Original Assignee
Koninkl Philips Electronics Nv
Rob A Beuker
Greef Petrus M De
Robert Koffrie
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 Koninkl Philips Electronics Nv, Rob A Beuker, Greef Petrus M De, Robert Koffrie filed Critical Koninkl Philips Electronics Nv
Priority to AU2003249530A priority Critical patent/AU2003249530A1/en
Priority to EP03787941A priority patent/EP1563479A2/en
Publication of WO2004017286A2 publication Critical patent/WO2004017286A2/en
Publication of WO2004017286A3 publication Critical patent/WO2004017286A3/en

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2059—Display of intermediate tones using error diffusion
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2044—Display of intermediate tones using dithering
    • G09G3/2051—Display of intermediate tones using dithering with use of a spatial dither pattern
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
    • G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
    • G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
    • G09G3/294—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge
    • G09G3/2948—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes for lighting or sustain discharge by increasing the total sustaining time with respect to other times in the frame
    • 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
    • H04N5/66—Transforming electric information into light information
    • H04N5/70—Circuit details for electroluminescent devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
    • G09G2320/0276—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G09G3/2077—Display of intermediate tones by a combination of two or more gradation control methods
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/012—Conversion between an interlaced and a progressive signal

Abstract

The invention relates to a video circuit (1) for processing video signals which show images on a display panel with linear light transition, comprising a gamma correction circuit (3), a quantizer (11) and a sub-field generator circuit (8). To save computing time, a memory (7) replaces the quantizer (11).
PCT/IB2003/003312 2002-08-19 2003-07-24 Video circuit WO2004017286A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003249530A AU2003249530A1 (en) 2002-08-19 2003-07-24 Video circuit
EP03787941A EP1563479A2 (en) 2002-08-19 2003-07-24 Video circuit

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP02078419.5 2002-08-19
EP02078419 2002-08-19
EP02079542.3 2002-10-30
EP02079542 2002-10-30

Publications (2)

Publication Number Publication Date
WO2004017286A2 WO2004017286A2 (en) 2004-02-26
WO2004017286A3 true WO2004017286A3 (en) 2004-06-03

Family

ID=31889449

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/003312 WO2004017286A2 (en) 2002-08-19 2003-07-24 Video circuit

Country Status (3)

Country Link
EP (1) EP1563479A2 (en)
AU (1) AU2003249530A1 (en)
WO (1) WO2004017286A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023224509A1 (en) * 2022-05-19 2023-11-23 Huawei Technologies Co., Ltd. Method for transforming data and related device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0525527A2 (en) * 1991-07-22 1993-02-03 International Business Machines Corporation Look-up table based gamma and inverse gamma correction for high-resolution frame buffers
US5282036A (en) * 1992-01-06 1994-01-25 Hewlett-Packard Company High resolution gamma correction method and apparatus for pixel intensity values in a computer graphics system using minimal memory
JPH06233131A (en) * 1993-01-29 1994-08-19 Fuji Film Micro Device Kk Gamma correction for digital image
EP0930716A2 (en) * 1998-01-17 1999-07-21 Sharp Kabushiki Kaisha Non-linear digital-to-analog converter and display
US6137542A (en) * 1998-12-21 2000-10-24 Phillips Electronics North America Corporation Digital correction of linear approximation of gamma
US6166781A (en) * 1996-10-04 2000-12-26 Samsung Electronics Co., Ltd. Non-linear characteristic correction apparatus and method therefor
US20020063784A1 (en) * 2000-11-24 2002-05-30 Hideyuki Kitagawa Digital-signal-processing circuit, display apparatus using the same and liquid-crystal projector using the same

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0525527A2 (en) * 1991-07-22 1993-02-03 International Business Machines Corporation Look-up table based gamma and inverse gamma correction for high-resolution frame buffers
US5282036A (en) * 1992-01-06 1994-01-25 Hewlett-Packard Company High resolution gamma correction method and apparatus for pixel intensity values in a computer graphics system using minimal memory
JPH06233131A (en) * 1993-01-29 1994-08-19 Fuji Film Micro Device Kk Gamma correction for digital image
US6166781A (en) * 1996-10-04 2000-12-26 Samsung Electronics Co., Ltd. Non-linear characteristic correction apparatus and method therefor
EP0930716A2 (en) * 1998-01-17 1999-07-21 Sharp Kabushiki Kaisha Non-linear digital-to-analog converter and display
US6137542A (en) * 1998-12-21 2000-10-24 Phillips Electronics North America Corporation Digital correction of linear approximation of gamma
US20020063784A1 (en) * 2000-11-24 2002-05-30 Hideyuki Kitagawa Digital-signal-processing circuit, display apparatus using the same and liquid-crystal projector using the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 018, no. 608 (E - 1633) 18 November 1994 (1994-11-18) *

Also Published As

Publication number Publication date
WO2004017286A2 (en) 2004-02-26
EP1563479A2 (en) 2005-08-17
AU2003249530A8 (en) 2004-03-03
AU2003249530A1 (en) 2004-03-03

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