Method and apparatus for increasing the recording time of a digital
video tape recorder
    3.
    发明授权
    Method and apparatus for increasing the recording time of a digital video tape recorder 失效
    用于增加数字录像机的记录时间的方法和装置

    公开(公告)号:US5493456A

    公开(公告)日:1996-02-20

    申请号:US385390

    申请日:1995-02-07

    摘要: Method for increasing the recording time of a digital video tape recorder ("VTR") and for supporting multiple normal play modes of digital VTR operation, e.g., a standard play mode of operation and one or more long play modes of operation. To achieve long play mode operation data reduction is performed on a received full rate video data stream to generate a reduced rate video data stream. Data reduction is performed using data prioritization and selection, requantization of full rate data stream, and/or by selecting data to be included in the reduced rate data stream as a function of what portion of a video frame the data represents. The reduced rate data stream is generated to be compliant with the data format of the full rate data stream. During long play mode recording operation the data in the reduced rate data stream is recorded on a tape at the same tape data density as used during standard mode VTR operation. In accordance with each of the recording methods of the present invention the rotational rate of the digital VTRs headwheel is the same for both standard and long play modes of VTR operation. In addition, the present invention is directed to several methods of reading data from a tape at a reduced data rate.

    摘要翻译: 用于增加数字录像机(“VTR”)的记录时间并用于支持数字VTR操作的多种正常播放模式的方法,例如标准播放操作模式和一种或多种长时间播放操作模式。 为了实现长播放模式操作,对接收到的全速率视频数据流执行数据缩减以产生降低速率的视频数据流。 使用数据优先化和选择,全速率数据流的重新排序和/或通过选择要包括在降低速率数据流中的数据作为数据表示的视频帧的部分的函数来执行数据缩减。 生成降低速率数据流以符合全速率数据流的数据格式。 在长播放模式记录操作期间,降低速率数据流中的数据以与在标准模式VTR操作期间使用的磁带数据密度相同地记录在磁带上。 根据本发明的每种记录方法,数字VTR前轮的旋转速率对于VTR操作的标准和长时间播放模式是相同的。 此外,本发明涉及以减小的数据速率从磁带读取数据的几种方法。

    Method and apparatus for improved video display of progressively
refreshed coded video
    6.
    发明授权
    Method and apparatus for improved video display of progressively refreshed coded video 失效
    用于改进逐渐刷新的编码视频的视频显示的方法和装置

    公开(公告)号:US5568200A

    公开(公告)日:1996-10-22

    申请号:US477787

    申请日:1995-06-07

    摘要: A method and apparatus for controlling the display of progressively refreshed decoded compressed image representative data is disclosed. Subframes of intracoded video signals, and subframes of intercoded video signals based on the intracoded video signals of successive video frames are used to construct a reference video frame. Refresh descriptor data is provided indicating the number of video frames necessary for acquiring intracoded video signals to form the reference video frame. The display of video frames is inhibited based on the refresh descriptor data until a suitable video frame of intracoded video signals and intercoded video signals based thereon is constructed. In another embodiment of the invention, at least one array of memory elements is provided for storing data corresponding to the subframes of a video frame. Each subframe of a video frame corresponds to one element of the memory array. Data indications are stored to mark as "clean" or initialized the regions of subframes having intracoded video signals and subframes having intercoded video signals based on the intracoded video signals. Substitute video signals are provided to conceal portions of respective video frames not marked as initialized, thereby provide a more pleasing picture to the viewer.

    摘要翻译: 公开了一种用于控制逐渐刷新的解码压缩图像代表数据的显示的方法和装置。 使用内部编码的视频信号的子帧,以及基于连续视频帧的内部编码的视频信号的帧间视频信号的子帧来构造参考视频帧。 提供刷新描述符数据,指示获取内部编码视频信号以形成参考视频帧所需的视频帧的数量。 基于刷新描述符数据禁止视频帧的显示,直到构成了基于内部编码的视频信号和基于帧间视频信号的适当的视频帧。 在本发明的另一个实施例中,提供至少一个存储元件阵列用于存储对应于视频帧的子帧的数据。 视频帧的每个子帧对应于存储器阵列的一个元素。 数据指示被存储以标记为“干净”或基于内部编码的视频信号来初始化具有内部编码视频信号的子帧的区域和具有相互间的视频信号的子帧。 提供替代视频信号以隐藏未被标记为初始化的各个视频帧的部分,从而向观看者提供更令人愉悦的画面。

    Access system and method for providing interactive access to an
information source through a networked distribution system
    7.
    发明授权
    Access system and method for providing interactive access to an information source through a networked distribution system 失效
    用于通过网络分发系统提供对信息源的交互访问的访问系统和方法

    公开(公告)号:US6049539A

    公开(公告)日:2000-04-11

    申请号:US931971

    申请日:1997-09-15

    摘要: An access system and method provides interactive access to an information source, such as the Internet, through a networked distribution system, such as a television distribution system. Each user in the television distribution system can access the Internet through an associated terminal by sending commands through an upstream channel to a headend server which is interfaced between a television network headend and an Internet Service Provider(ISP). The headend server manages all Internet information requests from the terminals by forwarding the requests to the ISP and receiving the requested information therefrom. An Internet Protocol (IP) address is assigned only to the headend server which keeps track of the terminals requesting information by means of terminal identification numbers or codes associated with each request. The headend server also maintains a plurality of Internet browser applications active at all times to insure that a terminal requesting Internet access can be immediately interfaced to the ISP through one of the active browser applications. Each of the downstream television signals includes a vertical synchronization signal that is preferably employed to generate a framing signal for synchronizing upstream transmission of the data packets comprising the information requests from the terminals.

    摘要翻译: 访问系统和方法通过诸如电视分发系统的联网分配系统提供对信息源(例如因特网)的交互式访问。 电视分配系统中的每个用户可以通过相关联的终端通过上行信道发送命令到接入在电视网络前端和因特网服务提供商(ISP)之间的头端服务器来接入互联网。 头端服务器通过将请求转发到ISP并从其接收所请求的信息来管理来自终端的所有互联网信息请求。 互联网协议(IP)地址仅分配给前端服务器,前端服务器通过与每个请求相关联的终端标识号码或代码跟踪终端请求信息。 前端服务器还保持多个互联网浏览器应用程序始终处于活动状态,以确保可以通过主动浏览器应用程序之一立即将请求Internet访问的终端连接到ISP。 每个下游电视信号包括垂直同步信号,其优选地用于产生用于同步包括来自终端的信息请求的数据分组的上行传输的成帧信号。

    Videophone system and method
    8.
    发明授权
    Videophone system and method 有权
    视频电话系统和方法

    公开(公告)号:US08063928B2

    公开(公告)日:2011-11-22

    申请号:US11514216

    申请日:2006-09-01

    IPC分类号: H04N7/14

    摘要: System and method for providing personal videotelephony in which a plurality of videophones are connected to a communications network that is configured for transmitted video and audio communications. Each of the videophones typically includes a camera, display device, telephone keypad, speaker and microphone all of which are operatively connected. The videophones further include means for selectably receiving and transmitting signals over the communications network, which signals represent images and/or sound, and for selectably displaying the signals representing any received signals representing the images on the display screen, and for playing any received signals representing the sounds on said speaker. Means are also provided for selectably accessing a remote location, such as, but not limited to, another videophone, using information entered or selected by a user of the videophone, and to retrieve the signals representing the images and sounds being transmitted from the remote location. In one or more embodiments the present invention further includes at least one networks operation center to store information related to the operation of the videophones and to facilitate the operation of the videophones.

    摘要翻译: 用于提供个人视频电话的系统和方法,其中多个可视电话连接到被配置用于发送的视频和音频通信的通信网络。 每个视频电话通常包括相机,显示设备,电话键盘,扬声器和麦克风,所有这些都是可操作地连接的。 视频电话还包括用于通过通信网络可选择地接收和发送信号的装置,哪些信号表示图像和/或声音,并且用于可选地显示表示在显示屏幕上表示图像的任何接收信号的信号,并且用于播放表示 所述扬声器上的声音。 还提供了用于可选择地访问远程位置(例如但不限于另一可视电话)的手段,使用由可视电话的用户输入或选择的信息,并且检索表示从远程位置发送的图像和声音的信号 。 在一个或多个实施例中,本发明还包括至少一个网络操作中心,用于存储与视频电话的操作有关的信息,并且便于视频电话的操作。

    Access system and method for providing interactive access to an information source through a networked distribution system
    10.
    发明授权
    Access system and method for providing interactive access to an information source through a networked distribution system 有权
    用于通过网络分发系统提供对信息源的交互访问的访问系统和方法

    公开(公告)号:US06477579B1

    公开(公告)日:2002-11-05

    申请号:US09386279

    申请日:1999-08-31

    IPC分类号: G06F1516

    摘要: A system and method for accessing Internet-based and other information through a user television in a television distribution network enables a user to access and view information which is related to the programming content of a currently viewed television broadcast. This concept, known as channel hyperlinking, enables a television viewer to download Internet Web pages, and the like, which are related to a currently viewed advertisement, program, newscast, etc. To facilitate channel hyperlinking, each user of the system sends channel hyperlink requests through an upstream channel to a network headend by actuating a hyperlink button on a television remote control, for example. The network headend is interfaced to the Internet by means of an Internet Service Provider (ISP), and downloads HTML Web page data from the Internet to the requesting user. Each television broadcast to be linked to the Internet-based or other information is transmitted by the original broadcaster with an identification tag which identifies the Universal Resource Locator (URL) or address where the program content related information is located. The headend uses the ID tag with channel and time of request information to identify the location of the information to be downloaded to the user. Preferably, the information is pre-cached from the ISP to a headend cache in advance of the broadcast to facilitate quicker downloading of the information to the user.

    摘要翻译: 通过电视分配网络中的用户电视接入基于互联网和其他信息的系统和方法使得用户能够访问和查看与当前观看的电视广播的节目内容相关的信息。 这种被称为频道超链接的概念使得电视观众能够下载与当前观看的广告,节目,新闻节目等相关的因特网网页等。为了促进频道超链接,系统的每个用户发送频道超链接 例如,通过启动电视遥控器上的超链接按钮,通过上行信道向网络头端请求。 网络头端通过互联网服务提供商(ISP)连接到互联网,并将HTML网页数据从因特网下载到请求用户。 要链接到基于因特网或其他信息的每个电视广播由原始广播公司用标识标识标识标识用于节目内容相关信息的通用资源定位符(URL)或地址的标识标签来发送。 前端使用具有请求信息的信道和时间的ID标签来标识要下载给用户的信息的位置。 优选地,在广播之前将信息从ISP预高速缓存到头端缓存,以便于更快地将信息下载到用户。