CN1110207C - 叠加电路 - Google Patents
叠加电路 Download PDFInfo
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- CN1110207C CN1110207C CN95103576A CN95103576A CN1110207C CN 1110207 C CN1110207 C CN 1110207C CN 95103576 A CN95103576 A CN 95103576A CN 95103576 A CN95103576 A CN 95103576A CN 1110207 C CN1110207 C CN 1110207C
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- 239000011159 matrix material Substances 0.000 claims abstract description 4
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- 238000000034 method Methods 0.000 claims description 5
- 230000002238 attenuated effect Effects 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 230000002194 synthesizing effect Effects 0.000 abstract 2
- 239000003990 capacitor Substances 0.000 description 2
- 241000233855 Orchidaceae Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- 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
- H04N5/44—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
- H04N5/44504—Circuit details of the additional information generator, e.g. details of the character or graphics signal generator, overlay mixing circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/278—Subtitling
-
- 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
- H04N9/641—Multi-purpose receivers, e.g. for auxiliary information
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Graphics (AREA)
- Processing Of Color Television Signals (AREA)
- Studio Circuits (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Abstract
一种叠加电路,包括N-位传输门电路;信号合成器用于产生R.G,B信号;RGB矩阵用于接收R.G.B信号并产生亮度信号,第一及第二色差信号;亮度信号放大器;分别用于调制第一和第二色差信号的一对调制器;第一混合器;和第二混合器分别用于产生载色信号和复合图象信号;衰减器;图象信号选择器;以及用于对选择的图象信号进行放大的输出放大器。于是内部与外部图象信号可在象素单元中以高速叠加。
Description
技术领域
本发明涉及图象设备的叠加电路,更具体步及一种叠加电路,这种叠加电路RGB信号可在一个象素单元中被叠加到外部图象信号上。
背景技术
音象相伴设备需要高速度叠加技术,用于处理作为外加背景图象信号标题的计算机远程指令语言(Lyrics)。一般而言,当外部背景图象信号为NTSC制式的模拟信号时,标题信号先作为数字式数据提供,然后按照背景信号混合处理。按照在由数一模转换器转换为模拟信号后,由于这些混合处理是用于叠加模拟信号的,故电路复杂化并与外部图象信号的同步是困难的。
发明内容
为了克服上述问题,本发明的目的是为了提供一种叠加电路,这种电路可在一个象素元中进行叠加。
为达到以上目标,基于本发明的电路包括:N一位传输门电路,用于响应消隐信号传输象素元中N一位RGB数据;信号合成器,用于通过从来自传输门电路的输出的N一位RGB数据的N一1最低有效位中每一R,G与B分量的分离,产生R,G信号;一个RGB矩阵,用于接收R,G与B信号并产生亮度信号,第一和第二色差信号;亮度信号放大器,用于放大亮度信号;用于调制第一与第二色差信号的一对调制器;一个第一混合器,用于合成被调制的色差信号并产生载波色信号,第二混合器,用于合成载波色信号,放大了的亮度信号及复合同步信号并产生复合图象信号;用于使外部图象信号衰减的衰减器;一个图象信号选择器,用于根据N-位数据的最高有效位值有选择地将被衰减的外部图象信号或复合图象信号输出;以及一个用于放大被选择的图象信号的输出放大器。
该叠加电路还包括:一个第一补偿器,用于补偿被调制的第一色差信号的相位并将该补偿的结果输出到该第一混合器;一个第二补偿器,用于补偿被调制的第二色差信号的相位并将该补偿结果输出到第一混合器;一个相位匹配部分,用于产生第一与第二控制信号以便在叠加并输出第一与第二控制信号到第一与第二补偿器过程中通过对色载波锁相而使得色脉冲信号与RGB的输入同步。
附图说明
本发明的以上目标和优点通过参照附图对其实施例的详述将变得更明显,图中:
图1是表示基于本发明的叠加电路的电路框图。
具体实施方式
图1的叠加电路包括一个16位传输门电路(TG)10,一个信号合成器20,一个RGB矩阵30,一个亮度信号放大器40,调制器50与60,第一混合器70,第二混合器80,衰减器90,一个图象信号选择器100,一个输出放大器110,一个第一补偿器120,一个第二补偿器130以及相位匹配部分140。
传输门电路10接收视频选择位的最高有效位和由五位组成的RBG数据并响应消隐信号输出这些位。当最高有效位的值为“0”时,一内部图象信号被选择,并且当最高有效位的值为“1”时,一个外部图象信号被选择。由三个5-电阻阵列22,24与26组成的信号合成器20接收5-位红(R)色数据,5-位(G)绿色数据和5-位兰(R)色数据,并产生合成的R,G与B信号。RGB矩阵30接收RGB数据并产生亮度信号Y,第一与第二色差信号B-Y与R-Y。亮度信号以预定的放大系数由亮度信号放大器40放大,并且第一与第二色差信号由调制器50和60分别调制。被调制的色信号由第一与第二补偿器120与130进行补偿以防止在叠加过程中的相位畸变。该第一与第二补偿器响应来自相位匹配部分140所产生的第一与第二控制信号。相位匹配部分140由压控振荡器VCO141,3.57MHZ的石英品体振荡器x,电容器C1,C2与C3,以及电阻器R1构成,其中第一与第二色载波被输入到VCO141。然后,来自VCO141输出的输出载波被锁相控制,并产生了第一与第二控制信号,被进行了相位补偿的调制了的色信号由第一混合器70进行混合并作为载波色信号而输出。由电阻器R2与R3及晶体管Q1构成的脉冲电平调整器150在外部图象信号通过输入端口IN输入时将信号电平调整到电阻器R2的数值,而当它不经输入端口IN输入时测调整该信号电平到电阻器R2与R3的平行阻值。载色信号与被放大的亮度信号及复合同步信号(SYNC)在第二混合器80中被混合并作为复合图象信号输出。外部图象信号通过连接电容器C4被加到-5dB衰减器90上并相应地被衰减。被衰减了的外部图象信号和复合图象信号响应来自传输门电路的最高有效位由转换到象素单元中的高速位的图象信号选择器100所选择并被叠加。复合图象信号被叠加到外部图象信号上的图象信号在输出放大器110中被放大以便被输出。
如上所述,根据本发明,两个图象信号在一个象素单元中被叠加并在叠加过程中可避免相位畸变。
Claims (2)
1.一种叠加电路,包括:
一个N一位传输门电路,用于响应消隐信号而传输一个象素单元中的N一位RGB数据;
一个信号合成器,用于通过从上述传输门电路输出的上述N一位RGB数据的N-1最低有效位中分离出R,G与B的每一分量而产生R,G与B信号;
一个RGB矩阵,用于接收上述R,G与B信号并产生亮度信号,第一与第二色差信号;
一个用于放大上述亮度信号的亮度信号放大器;
分别用于对上述第一与第二色差信号进行调制的一对调制器;
一个第一混合器,用于合成上述已调制的色差信号并产生载色信号;
一个第二混合器,用于合成上述载波色信号,上述放大了的亮度信号以及一个复合同步化信号并产生一复合图象信号;
一个用于衰减外部图象信号的衰减器;
一个图象信号选择器,用于根据上述N一位RGB数据的最高有效位值有选择地输出上述被衰减的外部图象信号或上述复合图象信号;以及
一个用于放大上述被选择图象信号的输出放大器。
2.如权利要求1中的叠加电路,进而包括:
一个第一补偿器,用于对上述已调制的第一色差信号进行相位补偿,并输出该补偿的结果到上述第一混合器;
一个第二补偿器,用于对上述调制的第二色差信号进行相位补偿并输出该补偿的结果到上述第一混合器;以及
相位匹配部分,用于产生第一及第二控制信号以使得色脉冲信号及RGB输入通过对色载波的锁相而在叠加过程中同步化,并输出该第一及第二控制信号到上述第一及第二补偿器中。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR35345/1994 | 1994-12-20 | ||
KR1019940035345A KR0138309B1 (ko) | 1994-12-20 | 1994-12-20 | 슈퍼임포즈회로 |
KR35345/94 | 1994-12-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1125377A CN1125377A (zh) | 1996-06-26 |
CN1110207C true CN1110207C (zh) | 2003-05-28 |
Family
ID=19402448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN95103576A Expired - Lifetime CN1110207C (zh) | 1994-12-20 | 1995-03-24 | 叠加电路 |
Country Status (4)
Country | Link |
---|---|
US (1) | US5598224A (zh) |
JP (1) | JPH08186469A (zh) |
KR (1) | KR0138309B1 (zh) |
CN (1) | CN1110207C (zh) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5767918A (en) * | 1986-10-11 | 1998-06-16 | Deutsche Thomson-Brandt Gmbh | Television receiver with a deflecting oscillator that has the additional function of controlling line generators that superimpose alphanumeric and/or graphic characters on the screen |
KR100207495B1 (ko) * | 1996-08-27 | 1999-07-15 | 윤종용 | 슈퍼임포우즈 장치 |
SG71046A1 (en) * | 1996-10-10 | 2000-03-21 | Connector Systems Tech Nv | High density connector and method of manufacture |
US6344853B1 (en) | 2000-01-06 | 2002-02-05 | Alcone Marketing Group | Method and apparatus for selecting, modifying and superimposing one image on another |
US20070197922A1 (en) * | 2006-02-17 | 2007-08-23 | Honeywell International Inc. | Disposable pressure sensor systems and packages therefor |
CN102289231B (zh) * | 2011-05-03 | 2012-12-26 | 中国兵器工业第二〇五研究所 | 同步于绝对时的光电跟踪仪接收控制电路 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58196778A (ja) * | 1982-05-11 | 1983-11-16 | Sony Corp | シンセサイザ方式のテレビジヨン受像機 |
US4639765A (en) * | 1985-02-28 | 1987-01-27 | Texas Instruments Incorporated | Synchronization system for overlay of an internal video signal upon an external video signal |
JPS62171296A (ja) * | 1986-01-22 | 1987-07-28 | Asahi Optical Co Ltd | 磁気記録方法 |
CN1039515A (zh) * | 1988-07-05 | 1990-02-07 | 三洋电机株式会社 | 处理彩色电视信号的场存储装置 |
CN1053343A (zh) * | 1989-12-09 | 1991-07-24 | 德国索姆森-布兰特有限公司 | 电视接收机中的字符***电路 |
US5065230A (en) * | 1988-09-27 | 1991-11-12 | Mitsubishi Denki Kabushiki Kaisha | Video signal processor for simultaneously reproducing a plurality of video information on a single monitor picture tube |
JPH04274680A (ja) * | 1991-02-28 | 1992-09-30 | Nec Corp | カラー信号合成装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4532540A (en) * | 1983-03-28 | 1985-07-30 | Rca Corporation | Teletext set-top converter with transparent mode |
US5051817A (en) * | 1988-11-18 | 1991-09-24 | Rohm Co., Ltd. | Superimposing system |
JPH06178314A (ja) * | 1992-12-04 | 1994-06-24 | Fujitsu General Ltd | テレビジョン受像機 |
-
1994
- 1994-12-20 KR KR1019940035345A patent/KR0138309B1/ko not_active IP Right Cessation
-
1995
- 1995-03-03 JP JP7044476A patent/JPH08186469A/ja active Pending
- 1995-03-24 US US08/409,603 patent/US5598224A/en not_active Expired - Lifetime
- 1995-03-24 CN CN95103576A patent/CN1110207C/zh not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58196778A (ja) * | 1982-05-11 | 1983-11-16 | Sony Corp | シンセサイザ方式のテレビジヨン受像機 |
US4639765A (en) * | 1985-02-28 | 1987-01-27 | Texas Instruments Incorporated | Synchronization system for overlay of an internal video signal upon an external video signal |
JPS62171296A (ja) * | 1986-01-22 | 1987-07-28 | Asahi Optical Co Ltd | 磁気記録方法 |
CN1039515A (zh) * | 1988-07-05 | 1990-02-07 | 三洋电机株式会社 | 处理彩色电视信号的场存储装置 |
US5065230A (en) * | 1988-09-27 | 1991-11-12 | Mitsubishi Denki Kabushiki Kaisha | Video signal processor for simultaneously reproducing a plurality of video information on a single monitor picture tube |
CN1053343A (zh) * | 1989-12-09 | 1991-07-24 | 德国索姆森-布兰特有限公司 | 电视接收机中的字符***电路 |
JPH04274680A (ja) * | 1991-02-28 | 1992-09-30 | Nec Corp | カラー信号合成装置 |
Also Published As
Publication number | Publication date |
---|---|
JPH08186469A (ja) | 1996-07-16 |
US5598224A (en) | 1997-01-28 |
KR0138309B1 (ko) | 1998-05-15 |
CN1125377A (zh) | 1996-06-26 |
KR960028585A (ko) | 1996-07-22 |
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