CN101091382A - 数字网络中的多个闭合字幕流和用户接入 - Google Patents

数字网络中的多个闭合字幕流和用户接入 Download PDF

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CN101091382A
CN101091382A CNA2005800419141A CN200580041914A CN101091382A CN 101091382 A CN101091382 A CN 101091382A CN A2005800419141 A CNA2005800419141 A CN A2005800419141A CN 200580041914 A CN200580041914 A CN 200580041914A CN 101091382 A CN101091382 A CN 101091382A
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CN101091382B (zh
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库马尔·拉马斯瓦米
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InterDigital CE Patent Holdings SAS
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41Structure of client; Structure of client peripherals
    • H04N21/426Internal components of the client ; Characteristics thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2801Broadband local area networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/02Details
    • H04L12/12Arrangements for remote connection or disconnection of substations or of equipment thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4305Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H04N21/4316Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/485End-user interface for client configuration
    • H04N21/4856End-user interface for client configuration for language selection, e.g. for the menu or subtitles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/488Data services, e.g. news ticker
    • H04N21/4884Data services, e.g. news ticker for displaying subtitles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/637Control signals issued by the client directed to the server or network components
    • H04N21/6371Control signals issued by the client directed to the server or network components directed to network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/647Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64784Data processing by the network

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Abstract

本发明提供一种用户端设备(CPE)装置,一种相应的方法,以及一种连接数字网络的数字用户线接入多路复用器。该CPE装置包括用户输入装置,其用于接收指定所寻找的闭合字幕(CC)信息的一个或者多个频道的用户输入。该CPE装置还包括用于接收用户输入指定的一个或多个频道的CC信息的解码器。

Description

数字网络中的多个闭合字幕流和用户接入
相关申请的交叉引用
本申请主张2004年12月6日提交的美国临时申请60/633,473的优先权,其内容通过引用全部结合于此。
技术领域
本发明一般涉及数字网络,特别涉及一种在数字网络中用于多个闭合字幕流和用户接入的方法及设备。
背景技术
数字广播系统中的闭合字幕(Closed captioning CC)信息通常作为数据信息传递。但是,对于CC信息何时需要在屏幕上显示或结合到视频有时间限制。原则上,这类似于使用各种时间戳机制等使音频轨道与视频轨道保持同步。在广播系统中,所有频道的CC信息由转发器或频道承载后调整至与音频相近似。在诸如数字用户线(DSL)网络的数字网络中,不存在将CC信息以近似音频的方式处理的机制。
因此,在数字网络中需要一种更先进的方法和设备来处理CC信息。
发明内容
本发明克服了现有技术的上述及其它缺陷,提供了一种在数字网络中用于多个闭合字幕流和用户接入的方法及设备。
根据本发明的一个方面,提供了一种连接数字网络的用户端设备(customerpremise equipment CPE)装置。该CPE装置包括用户输入装置,用于接收指定所寻找的闭合字幕(CC)信息的一个或多个频道的用户输入。该CPE装置还包含解码器,用于接收用户输入指定的一个或多个频道的CC信息。
根据本发明的另一个方面,提供了一种数字用户线接入多路复用器(Digital Subscriber Line Access Multiplexer,DSLAM),用于连接数字用户线(DSL)网络。该DSLAM包括选择多路复用器,用于接收多个媒体内容的多个闭合字幕(CC)信号,并且响应于从CPE装置接收到的用户输入,选择该多个CC信号中的至少一个分别发送至所连接的多个CPE装置中的每一个。
根据本发明的又一个方面,还提供了一种用于接收连接至数字网络的CPE装置中的闭合字幕(CC)信息的方法。该方法包括将用户输入从CPE装置传送到数字网络中的另一装置的步骤;该用户输入指定所寻找的闭合字幕(CC)信息的一个或多个频道。该方法还包含接收由用户输入指定的一个或多个频道的CC信息的步骤。
根据下面结合附图详细描述的具体实施例,本发明的上述及其它方面的特征与优点将变得很明显。
附图说明
结合下面的示意图有助于更好地理解本发明,其中:
图1是根据本发明原理的数字用户线(DSL)网络的框图;
图2是根据本发明原理的用于对CPE装置中的闭合字幕信息进行解码的示例方法的流程图;以及
图3是根据本发明原理的从数字用户线接入多路复用器(DSLAM)分发闭合字幕信息的示例方法的流程图。
具体实施方式
本发明涉及一种用于数字网络中多个闭合字幕流和用户接入的方法及设备。
有利地,本发明提供了,例如在DSL系统中,在DSLAM之前以及应主频道和PIP频道的要求进行切换之前被保留为单独的流的闭合字幕(CC),包括多语种的CC。同样,闭合字幕信息可随同视频数据发送至CPE,并根据所需显示的CC信息在CPE中被挑选。基于服务提供商的要求,主频道和PIP频道的音频信号能以各种方式处理,较当前模拟系统中所可能的具有更大的灵活性。例如,PIP频道的闭合字幕可以作为一个特征显示于主频道。
因而,本发明提供了一种将CC信息呈现于CPE的流机制。每一频道的CC信息在到DSLAM(或者在网络中指示将广播频道转换至特定用户的上行点)之前都保留为分开的流。在DSLAM(或者适当的转换点),CC传输流可选择显示于普通频道或PIP频道。推而广之,同样可以打开叠加在正在观看的主频道的属于任意频道的任何CC信息。例如,根据本发明于此所提供的教导,本发明可能的诸多应用中的一个典型应用是,若用户正观看一场足球赛,但又想获取别的频道播放的另一篮球赛的信息。根据本发明的原理,篮球赛的CC被要求叠加在当前正在观看的足球赛的频道。当然,根据本发明的原理,还可以在主频道上观看PIP频道的CC信息。
应该理解的是,虽然本发明在此主要描述有关数字网络的特定例子,即数字用户线(DSL)网络,根据本发明在此提供的教导,本领域一般技术人员能够容易地将本发明运用至任何运行的数字网络中,而且这些运用也保留在本发明的范围中。
本说明书阐述了本发明的原理。因而,可认为本领域技术人员能够据此做出各种设置,这些设置虽没有明确描述或体现,但具体实施了发明,并且包含于其精神和范围内。
此处叙述的所有例子和有条件的语言旨在教导目的,以辅助读者理解发明的原理和发明者对技术进步所贡献的概念,而且这些例子和语言可以解释成对这些所叙述的例子和条件不构成限制。
而且,所有在此叙述发明原理、特征和具体实施例,及其特定实例的陈述,意在涵括其结构与功能上的等同物。此外,其目的还在于这些等同物既包括目前已知的等同物也包括未来开发的等同物,即,被开发的执行相同功能的元件,而不论其结构如何。
因此,举例来说,本领域技术人员能领悟在此展示的框图展现了具体实施本发明原理的示例电路的概念图。同样,可以理解的是,任何流程图、流程框图、状态转移图、伪代码等,都表示可在计算机可读介质中充分展现并因此可由计算机或处理器运行的各种程序,而不论该计算机或处理器是否明确显示。
图中显示的各元件的功能可以通过使用专门的硬件以及能够配合适当软件运行该软件的硬件来提供。由处理器提供所述功能时,该功能可由单个专用处理器、单个共享处理器、或者由多个单独的处理器(其中一些可是共享的)来提供。而且,术语“处理器”或“控制器”的准确的用途,不能解释为仅仅涉及运行软件的硬件,还可能暗示地,非限定地包括,数字信号处理器(DSP)硬件、存储软件的只读存储器(ROM)、随机存取存储器(RAM)和非易失性存储器。
还可能包括其它传统硬件。类似地,图中显示的任何转换仅为概念上的。其功能可通过程序逻辑的操作、专用逻辑、程序控制与专用逻辑间的相互作用而实现,甚至手动实现,其特定的技术可以由实施者通过对上下文更特殊明确的理解来加以选择。
在权利要求中,以执行特定功能的装置来表述的任何元件,用来涵括实施该功能的任何方式,包括,例如:a)执行该功能的电路元件的结合或b)任何形式的软件,因而包括与适当的电路结合执行该软件以实现该功能的固件、微码或类似物。由权利要求定义的本发明基于这样的事实,即所述各装置所提供的功能以权利要求所主张的方式结合在一起。因此可以认为提供这些功能的任何装置与在此所示的等同。
转至图1,一个示例的数字用户线(DSL)网络用附图标记100表示。有利地,根据本发明的原理,DSL网络100可以产生、传输和选择应用层前向纠错(forward error correction,FEC)。
该DSL网络100包括超级头端单元110,内容发送中心120,视频服务器或视频服务中心和DSLAM(下文的“视频中心”)130和DSL回路140,以及用户端设备(CPE)150。
该超级头端单元110包括音频/视频编码器112,闭合字幕发生器114和多路复用器(此处缩写为“MUX”)116。音频/视频编码器112的输出端与多路复用器116的第一输入端以信号通信方式相连接;闭合字幕发生器114的输出端与多路复用器116的第二输入端以信号通信方式相连接;多路复用器116的第一输出端与内容发送中心120的第一输入端以信号通信方式相连接;多路复用器1 16的第二输出端与内容发送中心120的第二输入端以信号通信方式相连接。
视频中心130包括选择多路复用器132。该选择多路复用器132的第一输入端(用于音频/视频流)与内容发送中心120的第一输出端以信号通信方式相连接,其第二输入端(用于多个应用层FEC流)与内容发送中心120的第二输出端以信号通信方式相连接。该选择多路复用器132的第三输入端与DSL回路140的输出端以信号通信方式相连接。该选择多路复用  132的第四输入端与本地CC信息发生器188的输出端以信号通信方式相连接。
视频中心130的输出端,对应于多个DSL端线(drop)中的一个,与用户端设备150中的具有闭合字幕(CC)叠加能力的视频解码器154以信号通信方式相连接。该用户端设备还包含用户接口152,其具有与DSL回路140的输入端以信号通信方式相连接的输出端。
图1还显示了随同音频、视频及其它数据信息的单独的流一起的闭合字幕信息的单独的流。在DSLAM130中,基于用户端设备(CPE)的请求,适当的CC信息被转至选择多路复用器132,与将要被转到用户端设备中不同发送点的适当的音频、视频和数据流组合。
有利的是,利用本发明可提供诸如任何普通频道(可能是多语言)的闭合字幕信息。而且,利用本发明可使PIP频道的闭合字幕信息转换到普通频道流中,并在CPE150中进行组合以显示于普通频道。此外,可利用本发明在DSLAM130中本地插入任何紧急的闭合字幕信息(可以在DSLAM130中产生并插入本地CC信息)。
转至图2,一种用于在用户端设备(CPE)装置中解码闭合字幕信息的方法用附图标记200表示。该CPE装置200用于连接数字用户线(DSL)网络。
起始框202传递控制至功能框210,功能框210接收用于指定所寻找的闭合字幕(CC)信息的一个或多个频道的用户输入,然后传递控制至功能框220。该一个或多个指定频道可包括任何普通频道,甚至包括当前显示频道以外的频道。
功能框220将用户输入从CPE传送至DSLAM,并传递控制至功能框230。功能框230从DSLAM接收该用户输入所指定的一个或多个频道的CC信息,并解码该CC信息,然后传递控制至结束框292。功能框230可根据用户输入来解码CC信息用于以多种语言显示。此外,功能框230可将CC信息与普通频道信息和/或PIP信息结合起来显示。
转至图3,一种用于从数字用户线接入多路复用器(DSLAM)分发闭合字幕信息的示例方法用附图标记300表示。该DSLAM300用于连接数字用户线(DSL)网络。
起始框302传递控制至功能框310。功能框310接收来自CPE的用户输入,该用户输入指定所寻找的闭合字幕(CC)信息的一个或多个频道,并传递控制至功能框315。
功能框315接收和/或产生(包括应要求产生)一个或者多个媒体内容的一个或者多个闭合字幕(CC)信号,并传递控制到功能框320。
响应于从CPE接收的用户输入,功能框320选择至少一个CC信号分别发送至每个用户端设备(CPE)装置,并传递控制至功能框330。
功能框330将CC信息与视频数据进行组合,然后将组合的信息分别传送至每个CPE装置,并传递控制至结束框392。
基于此处的教导,本发明上述及其它特征与优点,可以为本领域一般技术人员很容易地确知。可以理解,本发明的教导可以用硬件、软件、固件、专用处理器或者其结合的不同形式来实施。
最有选的是,结合软件与硬件来实施本发明的教导。而且,软件更适合以明确嵌在程序储存单元的应用程序来实施。该应用程序可以由具有任何适当结构的机器上载及执行。更有选地是,该机器是在具有硬件的计算机平台上实施的,如一个或者多个中央处理器(CPU),随机存取存储器(RAM)和输入/输出(I/O)接口。该计算机平台还可能包括操作系统和微指令代码。此处描述的各式程序和功能可以是由CPU执行的部分微指令代码或部分应用程序,或者其组合。此外,各种其它外围单元可以与该计算机平台相连接,例如另外的数据存储单元和打印单元。
需要进一步了解的是,由于附图中描述的一些组成的系统元件与方法更适合以软件来实施,因此,系统元件之间或程序功能框之间的实际联系可能根据本发明编程方式不同而存在差异。根据此处的教导,相关技术领域的普通技术人员能够联想到本发明的这些以及相近实施或配置。
虽然,在此参考附图描述了示例性的具体实施例,需要理解的是,本发明并不仅限于这些具体实施例,相关技术领域中的普通技术人员能够于此基础上实现各种变化和修改,而不超出本发明的实质精神或范围。所有这些变化和修改都包含在所附的权利要求阐述的本发明的范围内。

Claims (15)

1、一种连接数字网络的用户端设备(CPE)装置,该CPE装置包括:
用户输入装置,接收用于指定所寻找的闭合字幕(CC)信息的一个或多个频道的用户输入;以及
解码器,接收由所述用户输入指定的一个或多个频道的CC信息。
2、根据权利要求1所述的CPE装置,其中该CC信息用于任何普通频道,包括当前显示的频道以外的频道。
3、根据权利要求1所述的CPE装置,其中所述解码器将CC信息与普通频道信息和PIP频道信息中的任何一个组合起来显示。
4、根据权利要求1所述的CPE装置,其中响应于CPE发送的信号,所述解码器接收所述CC信息。
5、根据权利要求1所述的CPE装置,其中该CC信息以多种语言被解码。
6、根据权利要求1所述的CPE装置,其中该数字网络为数字用户线(DSL)网络。
7、一种连接数字用户线(DSL)网络的数字用户线接入多路复用器(DSLAM),该DSLAM包括:
选择多路复用器,接收多个媒体内容的多个闭合字幕(CC)信号,以及响应于从用户端设备(CPE)接收到的用户输入,选择多个CC信号中的至少一个分别发送至多个CPE装置中的每一个。
8、根据权利要求7所述的DSLAM,还包括CC信息发生器,用于产生多个频道的CC信息。
9、根据权利要求7所述的DSLAM,其中在发送之前所述选择复用器将CC信息与视频数据进行组合。
10、一种在连接数字网络的用户端设备(CPE)装置中接收闭合字幕(CC)信息的方法,该方法包括步骤:
将用户输入从CPE发送至数字网络中的另一装置,该用户输入指定所寻找的闭合字幕(CC)信息的一个或者多个频道,以及
接收由所述用户输入指定的一个或者多个频道的CC信息。
11、根据权利要求10所述的方法,其中该CC信息用于任何普通频道,包括当前显示的频道以外的频道。
12、根据权利要求10所述的方法,还包括将CC信息与普通频道信息和PIP频道信息中的任何一个组合起来显示的步骤。
13、根据权利要求10所述的方法,其中该CC信息响应于CPE发送的信号被接收。
14、根据权利要求10所述的方法,其中该CC信息以多种语言被解码。
15、根据权利要求10所述的方法,其中该数字网络为数字用户线(DSL)网络。
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