CN102273192A - 两个高分辨率视频源之间的过渡 - Google Patents

两个高分辨率视频源之间的过渡 Download PDF

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CN102273192A
CN102273192A CN2010800039995A CN201080003999A CN102273192A CN 102273192 A CN102273192 A CN 102273192A CN 2010800039995 A CN2010800039995 A CN 2010800039995A CN 201080003999 A CN201080003999 A CN 201080003999A CN 102273192 A CN102273192 A CN 102273192A
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video
low resolution
resolution copy
vision signal
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托尼·桑艾厄·拉森
松林浩司
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Sony Corp
Sony Electronics Inc
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Abstract

一种在两个高分辨率视频信号之间过渡的方法包括用第一图像的较低分辨率副本(147)代替第一图像(145)，所述第一图像(145)是第一视频信号的帧；以及淡出第一图像的较低分辨率副本(147)以显露来自第二视频信号的第二图像(146)。一种用于显示视频信号的系统包括被配置成与至少一个视频信号源通信的视频监视器(100，100-1)。该系统被配置成用第一图像的较低分辨率副本(147)代替第一图像(145)，所述第一图像(145)是第一视频信号的帧；并且淡出第一图像的较低分辨率副本(147)以显露来自第二视频信号的第二图像(146)。

Description

两个高分辨率视频源之间的过渡
背景技术
视频和静止图像可以以各种格式被数字地存储在各种各样的存储介质中。例如，静止图像可以按照联合图片专家组(JPEG)格式被存储为电子图像文件。图像的JPEG文件随后可以被访问并显示在计算机或其他视频监视器上。
类似地，视频可以按照运动图片专家组(MPEG)标准格式被数字地存储。视频还可以作为MPEG数据来发送。MPEG视频随后可以在例如计算机、电视机或其他视频监视器上回放。
数字地存储的视频和静止图像可具有各种等级的分辨率或图像质量。分辨率或图像质量越高，为图像存储的数据越多。
视频和静止图像可以被存储在各种存储介质上。例如，数字视频和静止图像可以被存储在硬盘驱动器(hard drive)、软盘、致密盘(CD)、数字万用(或视频)盘(DVD)、蓝光盘或存储卡上。
发明内容
一种在两个高分辨率视频信号之间过渡的方法包括用第一图像的较低分辨率副本代替第一图像，所述第一图像是第一视频信号的帧；以及淡出第一图像的较低分辨率副本以显露来自第二视频信号的第二图像。
一种用于显示视频信号的系统包括被配置成与至少一个视频信号源通信的视频监视器。该系统被配置成用第一图像的较低分辨率副本代替第一图像，所述第一图像是第一视频信号的帧；并且淡出第一图像的较低分辨率副本以显露来自第二视频信号的第二图像。
附图说明
附图例示了本发明的各种实施例并且是说明书的一部分。所例示的实施例仅仅是本发明的示例而不限制发明的范围。
图1例示了第一系统，其中，媒体观看器应用被用于根据这里描述的原理以改进的高分辨率图像之间的过渡来在监视器上显示图像。
图2例示了第二系统，其中，媒体观看器应用被用于以改进的高分辨率图像之间的过渡来在监视器上显示图像。
图3例示了第三系统，其中，媒体观看器应用被用于以改进的高分辨率图像之间的过渡来在监视器上显示图像。
图4例示了根据这里描述的原理而提供改进的高分辨率图像之间的过渡的视频芯片的操作。
图5是例示根据这里描述的原理在高分辨率图像之间过渡的方法的流程图。
图6例示了另一实施例，其中根据这里描述的原理执行在来自卫星或线缆接收器盒的不同高清频道之间过渡的方法。
图7例示了另一实施例，其中根据这里描述的原理执行在不同高分辨率视频源之间过渡的方法。
在各个图中，相同的标号指示相似但不一定相同的元素。
具体实施方式
图1例示了可以存储和显示视频和静止图像两者的系统。如图1所示，该系统包括电视机或视频监视器100。该监视器100可以是能够显示静止或视频图像的任何设备，例如包括：阴极射线管设备、液晶显示器、等离子体电视等。
计算机101连接到监视器100。计算机101和监视器100之间的连接106允许计算机101发送静止或视频的图像数据到监视器100以供显示。如这里所使用的，术语“图像数据”将被理解为广义地指代静止图像数据和视频或运动图片图像数据二者。连接106例如可以是直接线缆、网络连接或无线连接。计算机101可以是家庭娱乐服务器或包括家庭娱乐服务器。
计算机101包括媒体观看器应用102。该应用102被计算机101用来访问图像数据并生成能够通过连接106被发送到监视器100的图像信号以便视频或静止图像被显示在监视器100上。媒体观看器应用102通常被安装在计算机101的硬盘驱动器上，并且当用户希望访问用于输出到监视器100的图像数据时在用户的控制下被计算机101运行。
媒体观看器应用102包括幻灯片(slideshow)功能107。幻灯片功能107能够自动访问特定存储介质上的图像数据并依次显示该特定存储介质上记录的所有静止和视频图像。
例如，计算机101可具有用于从CD 108读取数据并向CD 108写入数据的CD驱动器109。结果，记录有静止和/或视频图像105的CD 108可被插入到CD驱动器109中以供计算机101使用。如果幻灯片功能107被指向CD驱动器109，则幻灯片功能107将访问CD 108上的所有图像数据105并将在监视器100上依次显示该图像数据105。因此，CD 108上的图像数据的“幻灯片”被自动产生。
类似地，计算机101可具有用于接受存储卡103的端口104。存储卡103还可存储静止和/或视频图像数据105。
如前面那样，媒体观看应用102的幻灯片功能107可以被指向存储卡103。幻灯片功能107随后将访问存储卡103上的所有图像数据105并将在监视器100上依次显示该图像数据105。因此，存储卡103上的图像数据的“幻灯片”被自动产生。
通过类似方式，幻灯片功能107可被指向计算机101的硬盘驱动器或计算机101的硬盘驱动器上的特定文件或文件体系(file hierarchy)。幻灯片功能107随后将访问硬盘驱动器上的所有图像数据或硬盘驱动器上的该文件结构并将在监视器100上依次显示该图像数据。在其他实施例中，幻灯片功能107可访问数字生活网络联(DLNA)服务器上的幻灯片数据。
图2例示了也利用上述媒体观看应用102和幻灯片功能107的替代系统。如图2所示，监视器100可连接106到个人录像机(PVR)或机顶盒(STB)。PVR/STB可以是PVR或STB或者可以是它们二者。
具有幻灯片功能107的媒体观看器应用102也可在PVR/STB 120上安装和运行。虽然这可能需要对应用102和/或幻灯片功能107的一些修改，但是应用102和/或幻灯片功能107的操作保持相同。
遥控单元131可用来控制PVR/STB 120的操作。这将会包括运行媒体观看器应用102和调用幻灯片功能107。具体地，遥控单元131可以被用来将幻灯片功能107指向PVR/STB 120的硬盘驱动器以用于PVR/STB120上存储的所有图像数据的检索和系统化显示，从而产生如上所述的幻灯片。
类似地，PVR/STB 120可包括CD驱动器109和/或存储卡端口104。结果，如以上参考图1所述，遥控单元131可以被用来将幻灯片功能107指向PVR/STB 120可用的任何存储设备，包括DLNA服务器、驱动器109中的CD 108或端口104中的存储卡103。幻灯片功能107随后将自动创建该所选存储设备上的图像数据的幻灯片。
图3例示了可利用上述媒体观看器应用102和幻灯片功能107的又一系统。如图3所示，监视器或电视机100-1可包括用于接受图像数据存储介质132的内建端口或驱动器133，如以太网端口。例如，数据存储介质132可以是存储卡并且端口133可以是存储卡端口。
监视器100-1中的处理器和存储单元130可存储并运行上述媒体观看器应用102和幻灯片功能107。结果，用户可在处理器130上运行媒体观看器应用102并且随后调用幻灯片功能107。幻灯片功能107随后可使用存储介质132上的图像数据105来自动创建如上所述的幻灯片。作为替代，如果存在多个可用的数据存储介质，则幻灯片功能107可以选择性地指向所希望的存储介质，例如介质132。
监视器100-1可通过监视器100-1上的用户输入设备来控制。另外，遥控单元131-1可被用来控制监视器100-1，包括运行媒体观看器应用102和调用并控制幻灯片功能107。
这里描述的幻灯片功能107应提供特定存储介质上从一个图像文件到下一个图像文件的平滑过渡(smooth transition)或交替淡化(crossfade)。有时，该过渡将会是从静止图像到视频剪辑(video clip)的第一帧或是从视频剪辑的最后一帧到静止图像。过渡还可以是在一个视频剪辑的最后一帧与第二个视频剪辑的第一帧之间。
在上述各种系统中，媒体观看器应用利用视频硬件来处理所存储的图像数据并输出监视器所使用的信号。该硬件可以是视频卡或视频芯片(这里统称为视频芯片)的形式。
在所示出的图像具有较高分辨率的情况中，视频芯片的视频覆盖功能被使用。视频覆盖功能具有以高分辨率来处理静止和视频图像的能力。
不幸的是，目前很多视频芯片具有有限的alpha混合(即通过淡出第一个图像以显露第二个图像来在两个高分辨率图像之间过渡)能力。这些视频芯片可以从高分辨率图像向低分辨率图像、从低分辨率图像向高分辨率图像或者从一个低分辨率图像向另一个低分辨率图像交替淡化，但是不能从一个高分辨率图像向另一个高分辨率图像交替淡化。
这为这里描述的幻灯片功能107带来了某些问题。优选地，幻灯片功能107将提供图像数据文件之间的平滑过渡，即使当在一个高分辨率图像和另一个高分辨率图像之间过渡时也是如此。
举例来说，高分辨率图像可以是1920像素乘以1080像素的图像。低分辨率图像可以是1024像素乘以576像素的图像。这些示例仅仅是例示性的，以示出在高低分辨率图像之间所考虑的相对差别的一个示例。高分辨率图像可比给出的示例具有更多或更少的像素。低分辨率图像也可比给出的示例具有更多或更少的像素。
为了改进两个高分辨率图像之间的由媒体观看器应用102的幻灯片功能107提供的过渡，以下方案可被实施。第一高分辨率图像在短交替淡化过渡时段被图像的低分辨率副本代替。这样，视频芯片的从低分辨率图像向高分辨率图像过渡或交替淡化的功能被使用。由于出去的图像的低分辨率副本被显示并且随后立即被淡出，所以刚好在过渡之前的图像质量的改变对于用户而言将是察觉不到的，或者至少是不十分明显的。
图4例示了用于实现上述幻灯片功能107的改进的交替淡化的系统。如图4所示，第一图像即图像1145是高分辨率图像，希望从该图像淡化到另一个高分辨率图像即图像2146。
图像1145被存储在视频芯片的第一视频缓冲器142中。图像2被存储在第二视频缓冲器144中。视频覆盖141随后被指向第一视频缓冲器142中的图像1 145。
图像1145随后以较低的分辨率被复制以产生图像1的低分辨率副本147。图像1的低分辨率副本147被存储在图形缓冲器143中。低分辨率图形覆盖140随后被指向图形缓冲器143中的图像1的低分辨率副本147。
至此，图像1 145已被视频芯片输出和显示。现在，图形覆盖140被使能(enable)并且图像1的低分辨率副本147变为被视频芯片输出的图像，代替图像1的高分辨率版本145。
立刻，视频覆盖141被指向第二视频缓冲器144中的图像2 146，并且视频芯片开始淡出图像1的低分辨率副本147的图形覆盖。因此，随着图像1的低分辨率副本147淡出，图像2 146逐渐变为视频芯片的输出。
结果，高分辨率图像1 145和高分辨率图像2 146之间的平滑过渡被观看者感知。由于图像1的低分辨率副本147仅十分短暂地被显示并且迅速淡出以显露图像2146，因此从图像1 145到图像1的低分辨率副本147的切换不易被感知或者很难被检测并且不会减少观看者对正在呈现的幻灯片的享受。
如将认识到的，图像1 145可以是高分辨率静止图像或高分辨率视频剪辑的最后一帧。类似地，图像2 146可以是高分辨率静止图像或高分辨率视频剪辑的第一帧。
图5是例示了上述系统实施的方法的流程图。首先，图像1和2被缓冲(步骤149)到第一和第二视频缓冲器(142和144，图4)中。这可以包括集中这两个图像并调整这两个图像的大小以配合与能够被视频芯片的视频覆盖(141，图4)输出的最高可能分辨率(例如，1920像素乘以1080像素)相匹配的缓冲器。
接着，图形覆盖(140，图4)如果是活动的话，则被禁止(步骤150)。随着图形覆盖被禁止，视频覆盖(141，图4)被指向(步骤151)第一视频缓冲器中的图像1。因此，图像1变为视频芯片的输出并被显示。
图像1的低分辨率副本随后产生(步骤152)。图像1的低分辨率副本被存储在图形缓冲器中(143，图4)。被禁止的图形覆盖随后被指向(步骤153)图形缓冲器中的图像1的低分辨率副本。
当图形覆盖随后被使能时(步骤154)，图像1的低分辨率副本被覆盖在原始图像1上并且变为视频芯片的输出。视频芯片的alpha混合功能此时被设置为“全部图形”。
视频覆盖随后被指向(步骤155)第二视频缓冲器中的图像2(146，图4)。因此，在图形覆盖之后，图像2代替图像1。
视频芯片的alpha混合功能随后被调用来淡出(步骤156)图形覆盖中的图像1的低分辨率副本，以显露下面的视频覆盖中的高分辨率图像2。当淡出完成时，视频芯片的alpha混合功能被设置为“全部视频”。图形覆盖可再次被禁止(步骤157)。
结果，高分辨率图像1145和高分辨率图像2146之间的平滑过渡被观看者感知。由于图像1的低分辨率副本147仅十分短暂地被显示并且迅速淡出以显露图像2146，因此从图像1145到图像1的低分辨率副本147的切换不易被感知或者很难被检测并且不会减少观看者对正在呈现的幻灯片的享受。
图6是涉及当改变被HD接收器盒158调谐的频道时使用的方法的另一实施例的例示。接收器盒158例如可以是机顶盒(STB)、个人或数字录像机(PVR)、它们二者的组合，或者任何其他用来接收高清视频信号的单元。在某些实施例中，接收器盒158可以被集成或嵌入在电视机或监视器中。本示例中的接收器盒158可以从卫星、线缆、天线或高清信号可能来自的任何其他源接收高清信号。接收器盒158和监视器或电视(TV)机100之间的连接106可以通过任何实用的方法来进行，例如线缆、网络连接或无线连接。作为替代，如上所指示的，接收器盒158可以被集成或嵌入在电视机或监视器中。
遥控131或任何其他控制方法可被用来改变目前正被接收器盒158输出到监视器100的频道。接收器盒158具有从用户接口接收改变正被输出的频道的命令并相应地改变输出频道的功能159，从而允许用户选择不同节目进行观看。
根据上述原理，当一个HD或高分辨率频道被改变为另一个HD或高分辨率频道时，前一频道的最后一帧的高分辨率静止图像被监视器100上的同一图像的低分辨率副本代替。低分辨率副本随后淡出，显露来自新频道的HD视频馈送。
图7例示了在涉及不同HD源(包括但不限于HD视频播放器、蓝光播放器、DLNA服务器、基于互联网的服务器或接收器盒)的情况下，该高分辨率图像之间的过渡方法可如何被实施。很多娱乐系统具有不只一个连接到TV或监视器100的设备。例如，娱乐系统可涉及接到同一监视器或TV 100上的某种类型的高清视频播放器160和接收器盒158二者。
切换设备161有时被用来在两个不同源之间进行切换。应该注意，诸如TV或监视器之类的很多显示设备具有多个输入并包括嵌入式切换设备，因此不需要如图所示的外部切换设备。
遥控131或任何其他控制设备或用户接口可被用来在不同输入之间进行切换。像在前面的实施例中那样，旧源的最后一帧的静止图像被该图像的低分辨率副本代替。该低分辨率副本随后淡出，显露来自新源的视频馈送。
本方法不限于仅两个不同的源。可以有任意数目的向监视器100提供视频的HD视频源。切换来自这些HD视频源中的任意一个或任意其他HD视频源的活动馈送可以通过同样的以低分辨率来复制旧源的最后一帧的静止图像并且随后淡出该图像以显露来自新源的视频馈送的技术而被执行。
给出前面的描述仅为了例示和描述本发明的实施例。其不打算成为穷尽性的或者将发明限制在所公开的任何精确形式。鉴于以上教导，很多修改和变化是可能的。希望本发明的范围被所附权利要求限定。

Claims (19)

1.一种在两个高分辨率视频信号之间过渡的方法，所述方法包括：
用第一图像(145)的较低分辨率副本代替所述第一图像(145)，所述第一图像(145)是第一视频信号的帧；以及
淡出所述第一图像(145)的所述较低分辨率副本以显露来自第二视频信号的第二图像(146)。
2.根据权利要求1所述的方法，还包括禁止图形覆盖(140)并在代替所述第一图像(145)之前显示所述第一图像(145)。
3.根据权利要求1所述的方法，还包括将视频覆盖(141)指向所述第一图像(145)以在代替所述第一图像(145)之前显示所述第一图像(145)。
4.根据权利要求1所述的方法，还包括将所述第一图像(145)存储在第一视频缓冲器(142)中。
5.根据权利要求3所述的方法，还包括制作所述第一图像的所述较低分辨率副本(147)并将所述第一图像的所述较低分辨率副本(147)存储在图形缓冲器(143)中。
6.根据权利要求5所述的方法，还包括：
将图形覆盖(140)指向所述第一图像的所述较低分辨率副本(147)；以及
使能所述图形覆盖(140)。
7.根据权利要求6所述的方法，还包括完成用所述第一图像的所述较低分辨率副本(147)的所述图形覆盖(140)对所述第一图像(145)的显示的遮盖。
8.根据权利要求6所述的方法，还包括在淡出所述第一图像的所述较低分辨率副本(147)以显露所述第二图像(146)之前将所述视频覆盖(141)指向所述第二图像(146)。
9.根据权利要求1所述的方法，还包括将所述第二图像(146)存储在第二视频缓冲器(144)中。
10.根据权利要求1所述的方法，还包括在代替所述第一图像(145)之前集中所述第一图像(145)和所述第二图像(146)并调整所述第一图像(145)和所述第二图像(146)的大小以配合各自的缓冲器(142，144)。
11.一种用于在两个高分辨率视频信号之间过渡的系统，所述系统包括视频芯片，所述视频芯片包括：
第一视频缓冲器(142)，所述第一视频缓冲器(142)用于包含作为第一视频信号的帧的第一图像(145)；
第二视频缓冲器(144)，所述第二视频缓冲器(144)用于包含作为第二视频信号的帧的第二图像(146)；以及
图形缓冲器(143)，所述图形缓冲器(143)用于包含所述第一图像的较低分辨率副本(147)；
其中所述芯片被配置成用所述第一图像的所述较低分辨率副本(147)代替所述第一图像(145)并且淡出所述第一图像的所述较低分辨率副本(147)以显露所述第二图像(146)来开始所述第二视频信号的显示。
12.根据权利要求11所述的系统，还包括用于在代替所述第一图像(145)之前首先显示所述第一图像(145)的视频覆盖(141)。
13.根据权利要求11所述的系统，其中所述芯片还被配置成制作所述第一图像的所述较低分辨率副本(147)并将所述第一图像的所述较低分辨率副本(147)存储在图形缓冲器(143)中。
14.根据权利要求11所述的系统，还包括用于在所述第一图像(145)之上显示所述第一图像的所述较低分辨率副本(147)的图形覆盖(140)。
15.根据权利要求14所述的系统，其中所述芯片还被配置成在淡出所述第一图像的所述较低分辨率副本(147)以显露所述第二图像(146)之前将所述视频覆盖(140)指向所述第二图像(146)。
16.一种用于显示视频信号的系统，包括：
视频监视器(100，100-1)，所述视频监视器(100，100-1)被配置成与至少一个视频信号源通信；
其中所述系统被配置成用第一图像的较低分辨率副本(147)代替所述第一图像(145)，所述第一图像(145)是第一视频信号的帧；并且淡出所述第一图像的所述较低分辨率副本(147)以显露来自第二视频信号的第二图像(146)。
17.根据权利要求16所述的系统，其中所述至少一个视频信号源包括选择性地输出与第一频道的视频节目相对应的所述第一视频信号和与第二频道的视频节目相对应的所述第二视频信号的机顶盒(120)。
18.根据权利要求16所述的系统，其中所述至少一个视频信号源包括输出所述第一视频信号的第一视频信号源和输出所述第二视频信号的第二视频信号源。
19.根据权利要求18所述的系统，其中所述第一视频信号源或所述第二视频信号源是机顶盒(120)、高清接收器(158)、光盘播放器、视频服务器、录像机或广播网络中的任一个。
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