CN1669336A - 视频装置 - Google Patents
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Abstract
一种视频装置,具有:生成第一数字流(YCbCr3)的数字解码器(38);第一模拟信号(A1)的视频源(24);可连接到视频源(24)的视频编码器(42)和第一视频解码器(28),用于基于第一模拟信号(A1)生成第二数字流(YCbCr1)。开关(40)耦合到第一视频解码器(28)和数字解码器(38),用于特别地将第二数字流(YCbCr1)和第一数字流(YCbCr3)混合成到视频编码器(42)的输出数字流(YCbCrout)。
Description
技术领域
本发明涉及一种视频装置。
背景技术
使用数字视频数据的视频装置目前被广泛地使用。在这些机器中,数字视频解码器(例如MPEG解码器)将输入流(例如从卫星接收的或从例如DVD或硬盘的介质上读取的MPEG流)解码成第一数字流(例如符合ITU-R BT.656标准的4:2:2的数字流),随后通过视频解码器将该第一数字流转换成可视模拟信号。
传统上,可以在显示之前将来自另一个源的模拟信号插入到可视模拟信号中,以得到例如画中画(PIP)。当将被插入的模拟信号可以来自于若干个源并且处于若干种格式时(例如CVBS、S-Video和RGB),这一解决方案需要若干种类型的模拟混合器以及复合连接,以包含每种可能的视频信号组合。
此外,这一解决方案具有下述的缺陷:混合信号可作为模拟信号而得到(或者需要附加的数字编码器电路来输出该混合信号作为数字流),然而当前希望混合信号也能够作为数字流而得到并且不需要额外的花费。
发明内容
为了解决这些问题,本发明提出了一种视频装置,其包括生成第一数字流的数字解码器、第一模拟信号的视频源、视频解码器、可连接到视频源以便根据第一模拟信号生成第二数字流的第一视频解码器、以及耦合到第一视频解码器和数字解码器并能够将第二数字流和第一数字流混合成为到视频解码器的输出数字流的混合器件。
根据优选的实施例:
数字编码器基于第二模拟信号生成第三数字流,并且该数字编码器可连接到数字解码器以便将所述第三数字流发送到数字解码器;
数字编码器包括用于数字化第二模拟信号的视频解码器;
数字编码器和数字解码器经由数字选择器来链接;
数字选择器连接到介质接口。
本发明还提出了一种视频装置,其包括基于第一模拟视频信号生成第一数字流的第一视频解码器、基于第二模拟视频信号生成第二数字流的第二视频解码器、至少可连接到第二视频解码器并且能够基于第二数字流生成第三数字流的数字处理单元、以及连接到第一视频解码器和数字处理单元以便选择性地将第一数字流或第三数字流作为输出数字流输出到视频编码器的数字开关。
根据优选的实施例:
数字编码器基于所述输出数字流而输出输出模拟信号;
数字处理单元包括介质接口;
介质接口可连接到第二视频解码器,以便基于所述第二数字流而在所述介质上记录;
介质接口可连接到数字开关,以便基于从所述介质检索到的数据将数字流输出到所述数字开关。
附图说明
根据下面参照附图进行的描述,本发明及其其它特征将变得易于理解,其中:
图1示出了视频装置的示意图;
图2示出了数字视频记录器的示意图。
具体实施方式
在下面的描述中,为了简明起见,即使需要多根电线,也将信号示出和描述为在单根电线上传送。
图1示出了包括DVD播放器和调谐器的视频装置。在不包括调谐器的显示器,例如某些等离子体显示器中,特别有兴趣使用这种类型的视频装置。
视频装置具有模拟视频信号源2,该模拟视频信号源包括:调谐器16(准确地说是调谐器前端),其从在天线20上接收到的信号生成CVBS信号;和Scart连接器,其具有分别用于传送从例如数字机顶盒的另一设备接收到的CVBS信号和RGB信号的引脚Ain、Rin、Gin和Bin。
模拟视频信号源2还包括模拟开关18,用于选择调谐器16的输出和Scart连接器信号Ain中哪一个CVBS信号应当被用作输出CVBSin。
将模拟视频源2的输出端处的模拟信号发送到视频解码器4(例如ST公司的Sti5519IC),以便根据ITU-R BT.656标准(4:2:2流)生成数字流YCbCr2,该数字流数字地表示与所选的模拟信号相同的视频序列。
另一方面,视频装置还包括DVD读取器8,其从DVD中读取MPEG流,并将这一MPEG流发送到MPEG解码器6。当然可以使用其它类型的介质读取器来代替DVD读取器,例如硬盘驱动器(HDD)。根据从DVD读取器(即介质接口)8接收的MPEG流,MPEG解码器6输出4:2:2数字流YCbCr1。因此数字流YCbCr1是按照与通过视频编码器4输出的数字流YCbCr2相同的格式从盘得到的视频序列的数字表示。
数字开关10在第一输入端上接收来自视频解码器4的数字流YCbCr2,在第二输入端上接收来自数字解码器6的数字流YCbCr1。取决于来自如下面进一步解释的视频装置的微处理器(未示出)的控制,数字开关10选择性地输出数字流YCbCr1和YCbCr2中的一个作为输出数字流YCbCrout。
数字开关10(特别地,它的输出端传送输出数字流YCbCrout)一端连接到视频编码器12,另一端连接到DVI接口14。
根据输出数字流YCbCrout,视频编码器12(在特别地数字-模拟转换之后)将可视的模拟视频信号输出至Scart连接器的引脚Aout(传送CVBS信号)和引脚Rout,Gout和Bout(传送RGB信号)。通过将视频显示器连接至这一最后的Scart连接器,可以观看由输出数字流YCbCrout表示的视频序列。取决于用户的偏好,可以使用CVBS信号或RGB信号。
此外,DVI接口14根据DVI格式来转换输出数字流YCbCrout,并在用于连接到例如数字摄像机的数字连接器Dout上输出相应的数据。
可以通过微处理器根据两种主要模式来控制数字开关10。
在第一种模式中,数字开关10用于根据用户的选择来选择将由视频装置输出的视频序列。
作为第一个例子,如果用户希望在他的连接到Scart连接器的Rout,Gout,Bout引脚的等离子体显示器上观看来自调谐器16的频道,则微处理器将指示模拟开关18将调谐器16连接到视频解码器4,视频解码器4将CVBSin输入用作源,数字开关10将视频解码器4的输出YCbCr2用作输出数字信号YCbCrout。
作为第二个示例,如果用户希望从DVD观看电影,则微处理器指示数字开关10使用MPEG解码器6的输出YCbCr1作为输出数字信号YCbCrout。
在第二种模式,数字开关10用于以画中画的方式混合视频信号。例如,用户可以请求来自调谐器16的按比例缩小的图像叠加在从DVD播放的视频序列上。
为了实现这一处理,微处理器指示视频解码器4生成按比例缩小(参见Philips公司的SAA7118IC中的定标器功能)并与MPEG解码器6同步的(由于从视频解码器4发送到MPEG解码器6的同步信号Sync)数字流YCbCr2。
作为第二种模式的另一个例子,成比例的YCbCr1可以改为来自于MPEG解码器6。但是同步信号Sync仍然来自于视频解码器4。
图2示出了根据本发明的数字视频记录器。
数字视频记录器具有生成CVBS信号的模拟调谐器和解调器前端22。视频记录器还在具有用于传送CVBS信号的引脚Ain和用于传送RGB信号的引脚Rin、Gin、Bin的第一Scart连接器上接收模拟视频信号。第一Scart连接器例如连接到机顶盒。
数字视频记录器包括两个选择器24和26。选择器24选择性地从前端22或从第一Scart连接器的引脚Ain输出模拟信号作为第一模拟视频信号A1。类似地,选择器26选择性地从前端22或从第一Scart连接器的引脚Ain输出模拟信号作为第二模拟视频信号A2。
选择器24,26中的每一个可以具有多个输入端,而不用修改下面的说明,并且从而本发明适合于任何数目的模拟输入端。
将第一模拟视频信号A1转送到还从引脚Rin、Gin、Bin接收RGB信号的第一视频解码器28。取决于来自微处理器的指令,第一视频解码器28可以根据ITU-R BT.656标准将第一模拟视频信号A1或RGB信号转换成第一数字流YCbCr1(4:2:2流)。
类似地,将第二模拟视频信号A2转送到还从引脚Rin,Gin,Bin接收RGB信号的第二视频解码器30,从而第二视频解码器30可以将第二模拟视频信号A2或RGB信号转换成第二4:2:2数字流YCbCr2。
在可替换实施例(未示出)中,如果有若干个可用RGB信号源,则可以以与选择器24和26选择哪个CVBS信号应当被发送到第一和第二视频解码器相同的方式,使用两个RGB开关来分别选择哪个RGB信号应当被发送到第一视频解码器和第二解码器。
MPEG编码器32耦合至第二视频解码器30,以便将第二数字流YCbCr2转换成MPEG流。
数字选择器34-在专利申请EP1128673中描述为“多路复用器”-允许在MPEG编码器32、介质接口36和MPEG解码器38之间的各种连接。
介质接口36例如是硬盘驱动器(HDD),其可以在硬盘上记录来自MPEG编码器32的MPEG流,并且从硬盘检索随后将被传送到MPEG解码器38的MPEG流。
可以使用可替换类型的介质接口36,例如DVD记录器单元。
由于数字选择器34,MPEG解码器可以可替换地解码从硬盘检索的MPEG流(即,来自介质接口的数字流)或者由MPEG编码器32生成的MPEG流。基于所选择的MPEG流,MPEG解码器38输出4:2:2数字流(第三数字流)YCbCr3。
数字开关40在第一输入端上接收第一数字流YCbCr1并在第二输入端上接收第三数字流YCbCr3。数字开关40由微处理器(未示出)控制以便选择性地将第一数字流YCbCr3或第三YCbCr3作为到视频编码器42和DVI接口44的输出数字流YCbCrout。
基于输出数字流YCbCrout,视频编码器42将可视模拟视频信号输出(在特别地数字-模拟转换之后)到具有引脚Aout(传送CVBS信号)和引脚Rout、Gout、Bout(传送RGB信号)的第二Scart连接器。通过将视频显示器连接到这一第二Scart连接器,可以观看由输出数字流YCbCrout表示的视频序列。取决于用户的偏好,可以使用CVBS信号或RGB信号。
此外,DVI接口44根据DVI格式转换输出数字流YCbCrout,并且在例如用于连接到数字摄像机的数字连接器Dout上输出相应的数据。
数字开关可以由微处理器根据两种主模式来控制。
在第一模式中,数字开关40用于根据用户的抉择来选择将由视频装置输出的视频序列。例如,如果用户希望在记录来自前端22的模拟信号的同时观看在第一Scart连接器上接收的模拟CVBS信号,则控制第一选择器24以将引脚Ain连接到第一视频解码器28并控制数字开关40以将第一视频解码器28连接到视频编码器42;同时,控制第二选择器26以将前端22的输出连接到第二视频解码器30,该第二视频解码器30的数字输出流YCbCr2被转换成MPEG流(在MPEG编码器32)上并被记录在HDD 36上。
在第二模式中,数字开关40用于以画中画的方式混合视频信号。例如,用户可以请求来自前端22的按比例缩小的图像叠加在在第一Scart连接器上作为RGB信号接收的视频序列上(例如从个人计算机接收的视频序列)。
为了实现这一操作,微处理器指示第一选择器24将前端22连接到第一视频解码器28并指示第一视频解码器28生成按比例缩小(参见Philips公司的SAA7118 IC的定标器功能)且与MPEG解码器38同步(由于从第一视频解码器28发送到MPEG解码器38的同步信号Sync)的数字流YCbCr1。微处理器还指示第二视频解码器30使用来自RGB输入端(Rin,Gin,Bin)的信号并指示数字选择器34将MpEG编码器32连接到MPEG解码器38,从而来自RGB输入端的视频序列一旦数字化就被传送到数字开关40,作为第三数字流YCbCr3。如同例如在专利申请WO 95/35 625中描述的,微处理器控制数字开关10将数字流YCbCr1的活动部分叠加在数字流YCbCr3上。
作为这一模式的第二个示例,成比例的YCbCr3可以改为来自MPEG解码器38。但是同步信号Sync仍然来自于视频解码器28。
这些示例清楚地示出了由本发明提出的构造允许混合任何类型的输入模拟信号,而不需要复杂的模拟开关。当然,输入模拟信号(例如对于前端22的)与数字源(例如,HDD 36)的混合也是可能的(第一视频解码器28数字化前端输出,且数字开关40将这一数字化流与MPEG解码器38的输出相混合)。
此外,这一构造还具有混合的视频序列可以容易地作为数字流(YCbCrout)而得到的优点,这在现今越来越有用。
最后,当接收两个模拟视频信号时,即使在没有发生混合时,提供两个视频解码器28,30允许第一个目的是数字化一个模拟信号,例如以改善的图像形式观看(根据在专利申请EP 1128673中提出的技术经由第一视频解码器28和视频编码器42),和第二个目的是数字化第二模拟信号,例如记录(经由第二视频解码器28和MPEG编码器32)。
本发明充分重视化视频装置能够用减少数量的电路来操作的方法。
Claims (10)
1.一种视频装置,包括:
生成第一数字流(YCbCr1;YCbCr2)的数字解码器(6;38);
第一模拟信号的视频源(2;24);
视频编码器(12;42);
可连接到所述视频源(2;24)的第一视频解码器(4;28),用于基于第一模拟信号(CVBSin;A1)生成第二数字流(YCbCr1;YCbCr2);
耦合到第一视频解码器(4;28)和数字解码器(6;38)的混合器件(10,Sync;40,Sync),能够将第二数字流(YCbCr2;YCbCr1)与第一数字流(YCbCr1;YCbCr2)混合成到视频编码器(12;42)的输出数字流(YCbCrout)。
2.根据权利要求1的视频装置,其中数字编码器(30,32)基于第二模拟信号(A2)生成第三数字流,并且其中数字编码器(30,32)可连接到数字解码器(38),以便将所述第三数字流发送到该数字解码器(38)。
3.根据权利要求2的视频装置,其中所述数字编码器(30,32)包括用于数字化第二模拟信号(A2)的视频解码器(30)。
4.根据权利要求2或3的视频装置,其中所述数字编码器(30,32)和数字解码器(38)经由数字选择器(34)而链接。
5.根据权利要求4的视频装置,其中所述数字选择器(34)连接到介质接口(36)。
6.一种视频装置,包括:
第一视频解码器(28),其基于第一模拟视频信号(A1)生成第一数字流(YCbCr1);
第二视频解码器(30),其基于第二模拟视频信号(A2)生成第二数字流(YCbCr2);
数字处理单元(32,34,36,38),其至少可连接到第二视频解码器(30),并能够基于第二数字流(YCbCr2)生成第三数字流(YCbCr3);
数字开关(40),连接到第一视频解码器(28)和数字处理单元(32,34,36,38),用于选择性地将第一数字流(YCbCr1)或第三数字流(YCbCr3)作为输出数字流(YCbCrout)输出到视频编码器(42)。
7.根据权利要求6的视频装置,其中所述视频编码器(42)基于所述输出数字流(YCbCrout)输出一输出模拟信号(Aout;Rout,Gout,Bout)。
8.根据权利要求6或7的视频装置,其中所述数字处理单元包括介质接口(36)。
9.根据权利要求8的视频装置,其中所述介质接口(36)可连接至第二视频解码器(30),用于基于所述第二数字流(YCbCr2)来记录所述介质数据。
10.根据权利要求8或9的视频装置,其中所述介质接口(36)可连接至数字开关(40),用于基于从所述介质检索的数据向所述数字开关(40)输出数字流。
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EP02291824A EP1383340A1 (en) | 2002-07-18 | 2002-07-18 | Video apparatus |
EP02291824.7 | 2002-07-18 |
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CN1669336A true CN1669336A (zh) | 2005-09-14 |
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US (1) | US7848623B2 (zh) |
EP (2) | EP1383340A1 (zh) |
JP (1) | JP2005538579A (zh) |
CN (1) | CN1669336A (zh) |
DE (1) | DE60331836D1 (zh) |
WO (1) | WO2004010713A1 (zh) |
Cited By (1)
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CN106341622A (zh) * | 2015-07-06 | 2017-01-18 | 阿里巴巴集团控股有限公司 | 一种多路视频流的编码方法及装置 |
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EP1383317A1 (en) * | 2002-07-17 | 2004-01-21 | Thomson Licensing S.A. | Video apparatus |
US7609947B2 (en) | 2004-09-10 | 2009-10-27 | Panasonic Corporation | Method and apparatus for coordinating playback from multiple video sources |
WO2009127085A1 (en) * | 2008-04-18 | 2009-10-22 | Zoran Corporation | Methods and systems of controlling an electronic device's i/o terminals using pulse-width modulation |
TWI411294B (zh) * | 2008-05-26 | 2013-10-01 | Realtek Semiconductor Corp | 視訊系統及縮放器 |
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JPH05145762A (ja) * | 1991-11-20 | 1993-06-11 | Sanyo Electric Co Ltd | 静止画受信装置 |
US5371551A (en) * | 1992-10-29 | 1994-12-06 | Logan; James | Time delayed digital video system using concurrent recording and playback |
US5592234A (en) * | 1994-12-22 | 1997-01-07 | U.S. Philips Corporation | Interface system for a television receiver |
DE69631180T2 (de) * | 1995-09-11 | 2004-09-02 | Matsushita Electric Industrial Co., Ltd., Kadoma | Fernsehsignalaufnahme- und -wiedergabeanlage |
JPH09163261A (ja) | 1995-12-13 | 1997-06-20 | Toshiba Corp | 画像表示装置 |
US5923379A (en) * | 1996-12-02 | 1999-07-13 | Samsung Electronics Co., Ltd. | DSS/DVD picture in picture with internet |
JP3123464B2 (ja) * | 1997-06-04 | 2001-01-09 | 日本電気株式会社 | 映像信号処理方法及び装置 |
JPH11136594A (ja) | 1997-10-27 | 1999-05-21 | Sony Corp | マルチ画面装置 |
JPH11177884A (ja) | 1997-12-10 | 1999-07-02 | Fujitsu General Ltd | マルチ画面表示装置 |
JPH11215472A (ja) | 1998-01-22 | 1999-08-06 | Pioneer Electron Corp | 情報記録装置及び情報再生装置 |
KR100511250B1 (ko) * | 1998-04-09 | 2005-11-03 | 엘지전자 주식회사 | 디지탈오디오/비디오(a/v)시스템 |
US6157415A (en) * | 1998-12-15 | 2000-12-05 | Ati International Srl | Method and apparatus for dynamically blending image input layers |
JP2000295527A (ja) | 1999-04-05 | 2000-10-20 | Matsushita Electric Ind Co Ltd | 映像合成装置 |
JP2001135024A (ja) * | 1999-11-05 | 2001-05-18 | Hitachi Ltd | 画像/音声信号記録再生装置 |
AU2260601A (en) * | 1999-12-14 | 2001-06-25 | Broadcom Corporation | Video, audio and graphics decode, composite and display system |
EP1128673A3 (en) * | 2000-02-23 | 2006-05-10 | THOMSON multimedia | Video apparatus, notably video recorders, and processes for use in said video apparatus |
EP1274236A1 (en) * | 2001-07-05 | 2003-01-08 | Thomson Licensing S.A. | Video apparatus with picture-in-picture ability |
US7111319B1 (en) * | 2001-09-10 | 2006-09-19 | Lsi Logic Corporation | Set top box access hub system |
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2003
- 2003-07-09 US US10/521,491 patent/US7848623B2/en not_active Expired - Fee Related
- 2003-07-09 DE DE60331836T patent/DE60331836D1/de not_active Expired - Lifetime
- 2003-07-09 JP JP2004522578A patent/JP2005538579A/ja active Pending
- 2003-07-09 EP EP03765117A patent/EP1523858B1/en not_active Expired - Lifetime
- 2003-07-09 WO PCT/EP2003/050300 patent/WO2004010713A1/en active Application Filing
- 2003-07-09 CN CNA038169975A patent/CN1669336A/zh active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106341622A (zh) * | 2015-07-06 | 2017-01-18 | 阿里巴巴集团控股有限公司 | 一种多路视频流的编码方法及装置 |
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WO2004010713A1 (en) | 2004-01-29 |
DE60331836D1 (de) | 2010-05-06 |
EP1383340A1 (en) | 2004-01-21 |
US7848623B2 (en) | 2010-12-07 |
WO2004010713A8 (en) | 2005-03-17 |
EP1523858B1 (en) | 2010-03-24 |
JP2005538579A (ja) | 2005-12-15 |
US20050238106A1 (en) | 2005-10-27 |
EP1523858A1 (en) | 2005-04-20 |
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