BR9805932A - Circuito de deteccão de cor vermelha pura e circuito de compensacão de cor que utiliza o mesmo. - Google Patents

Circuito de deteccão de cor vermelha pura e circuito de compensacão de cor que utiliza o mesmo.

Info

Publication number
BR9805932A
BR9805932A BR9805932-7A BR9805932A BR9805932A BR 9805932 A BR9805932 A BR 9805932A BR 9805932 A BR9805932 A BR 9805932A BR 9805932 A BR9805932 A BR 9805932A
Authority
BR
Brazil
Prior art keywords
signal
output signal
detection circuit
gain controller
color
Prior art date
Application number
BR9805932-7A
Other languages
English (en)
Inventor
Hiroko Sugimoto
Atsuhisa Kageyama
Masahiro Takeshima
Minoru Kawabata
Original Assignee
Matsushita Electric Ind Co Ltd
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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of BR9805932A publication Critical patent/BR9805932A/pt

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
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits

Landscapes

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

Abstract

Patente de Invenção:<B>"CIRCUITO DE DETECçãO DE COR VERMELHA PURA E CIRCUITO DE COMPENSAçãO DE COR QUE UTILIZA O MESMO"<D>. A saturação de cor vermelha é aumentada e cor vermelha de maior pureza pode ser reproduzida combinando: um circuito de detecção da cor vermelha (1) para detectar um sinal de cor vermelha que possui maior pureza introduzindo sinais diferenciais de cor (R-Y)e (B-Y) modulados por subportador de cor, subtraindo, do componente de polaridade positiva do sinal (R-Y), o valor absoluto do sinal (B-Y), e removendo a parte negativa do sinal subtraído; um bloco de compensação de sinal Y que inclui: um primeiro controlador de ganho (50b) para controlar a amplitude de sinal de saída do circuito de detecção da cor vermelha (1) e um subtrator (50a) para subtrair, de um sinal de luminância Y, o sinal de saída do primeiro controlador de ganho (50b); um bloco de compensação de sinal (R-Y) que inclui: um segundo controlador de ganho (51b) para controlar a amplitude de sinal de saída do circuito de detecção da cor vermelha (1) e um somador (51a) para somar o sinal de saída do segundo controlador de ganho (51b) ao sinal (R-Y) introduzido; e um bloco de compensação de sinal (B-Y) que inclui: um terceiro controlador de ganho (52b) para controlar a amplitude de sinal de saída do circuito de detecção da cor vermelha (1), um inversor de polaridade (52c) para inverter a polaridade de sinal de saída do terceiro controlador de ganho (52b), um circuito de comutação (52d) para selecionar ou um sinal de entrada ou um sinal de saída do inversor de polaridade (52c), um discriminador de polaridade (52e) para discriminar a polaridade (B-Y) introduzido e controlar o circuito de comutação (52d) e um somador (52e) para adicionar o sinal de saída do circuito de comutação (52d) ao sinal (B-Y) introduzido.
BR9805932-7A 1997-03-06 1998-03-05 Circuito de deteccão de cor vermelha pura e circuito de compensacão de cor que utiliza o mesmo. BR9805932A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5133997 1997-03-06
PCT/JP1998/000919 WO1998039923A1 (en) 1997-03-06 1998-03-05 Pure red color detection circuit and color compensation circuit using the same

Publications (1)

Publication Number Publication Date
BR9805932A true BR9805932A (pt) 1999-08-31

Family

ID=12884177

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9805932-7A BR9805932A (pt) 1997-03-06 1998-03-05 Circuito de deteccão de cor vermelha pura e circuito de compensacão de cor que utiliza o mesmo.

Country Status (10)

Country Link
US (1) US6064447A (pt)
EP (1) EP0922362B1 (pt)
JP (1) JP3860221B2 (pt)
KR (1) KR100365848B1 (pt)
CN (1) CN1305316C (pt)
BR (1) BR9805932A (pt)
CZ (1) CZ290605B6 (pt)
DE (1) DE69809691T2 (pt)
MY (1) MY124641A (pt)
WO (1) WO1998039923A1 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1492356A3 (en) * 1998-11-13 2005-11-23 CNH Canada Ltd. Method for color detection in video images
CA2350712C (en) * 1998-11-13 2004-05-25 Flexi-Coil Ltd. Method for color detection in video images
JP4489262B2 (ja) * 2000-07-28 2010-06-23 日立プラズマディスプレイ株式会社 カラー表示の色再現補正回路及びカラーディスプレイ
GB2396504B (en) * 2002-12-20 2005-11-23 Canon Kk Image processing

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0832054B2 (ja) * 1987-03-24 1996-03-27 オリンパス光学工業株式会社 カラ−エンハンス回路
US4847677A (en) * 1988-04-27 1989-07-11 Universal Video Communications Corp. Video telecommunication system and method for compressing and decompressing digital color video data
US5134465A (en) * 1989-08-30 1992-07-28 Hitachi Video Engineering, Inc. Color detecting circuit
US5442408A (en) * 1989-11-17 1995-08-15 Sanyo Electric Co., Ltd. White balance adjusting apparatus for automatically adjusting white balance in response to luminance information signal and color information signal obtained from image sensing device
JP2766067B2 (ja) * 1990-10-31 1998-06-18 キヤノン株式会社 撮像装置
US5418575A (en) * 1991-12-11 1995-05-23 Hitachi, Ltd. Color display apparatus having compensating unit
JP3137704B2 (ja) * 1991-12-11 2001-02-26 株式会社日立製作所 色再現補正方法，色再現補正回路及びこれを用いたカラーディスプレイ装置
KR970010266B1 (ko) * 1992-03-31 1997-06-23 미쯔시다덴기산교 가부시기가이샤 플라즈마 발생방법 및 그 장치
JPH0614334A (ja) * 1992-06-29 1994-01-21 Matsushita Electric Ind Co Ltd 映像信号処理回路
US5294974A (en) * 1992-07-24 1994-03-15 Matsushita Electric Corporation Of America High-definition video encoding system having color-sensitive quantization
US5835641A (en) * 1992-10-14 1998-11-10 Mitsubishi Denki Kabushiki Kaisha Image pick-up apparatus for detecting and enlarging registered objects
JPH06178310A (ja) * 1992-12-03 1994-06-24 Sony Corp 映像信号用増幅器
US6002448A (en) * 1993-04-19 1999-12-14 Mitsubishi Denki Kabushiki Kaisha Image quality correction circuit and method based on color density
JP3640403B2 (ja) * 1993-05-14 2005-04-20 クラリオン株式会社 映像信号の色検出回路
JP3466661B2 (ja) * 1993-06-29 2003-11-17 キヤノン株式会社 画像処理装置及びその方法
JPH0795611A (ja) * 1993-09-20 1995-04-07 Toshiba Corp 色飽和度補正回路
JPH08102958A (ja) * 1994-09-30 1996-04-16 Sony Corp 特定色相検出回路
US5838465A (en) * 1994-12-02 1998-11-17 Hitachi, Ltd. Color compensating method of color image and color image generating apparatus
US5850473A (en) * 1997-01-07 1998-12-15 Lucent Technologies Inc. Method and apparatus for compensating for color variation in a video system
KR100266587B1 (ko) * 1997-12-09 2000-09-15 구자홍 색보상 장치

Also Published As

Publication number Publication date
JP2000513906A (ja) 2000-10-17
MY124641A (en) 2006-06-30
JP3860221B2 (ja) 2006-12-20
EP0922362A1 (en) 1999-06-16
US6064447A (en) 2000-05-16
DE69809691D1 (de) 2003-01-09
WO1998039923A1 (en) 1998-09-11
DE69809691T2 (de) 2003-04-10
KR20000065213A (ko) 2000-11-06
CZ290605B6 (cs) 2002-08-14
CN1305316C (zh) 2007-03-14
CZ353798A3 (cs) 1999-03-17
CN1217853A (zh) 1999-05-26
KR100365848B1 (ko) 2003-02-20
EP0922362B1 (en) 2002-11-27

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Legal Events

Date Code Title Description
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements
B11N Dismissal: publication cancelled [chapter 11.14 patent gazette]

Free format text: REFERENTE A RPI 2097 DE 15/03/2011 CODIGO DE DESPACHO: 11.2

B25D Requested change of name of applicant approved

Owner name: PANASONIC CORPORATION (JP)

Free format text: NOME ALTERADO DE: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

B09A Decision: intention to grant [chapter 9.1 patent gazette]
B11D Dismissal acc. art. 38, par 2 of ipl - failure to pay fee after grant in time