Access system and method for providing interactive access to an
information source through a networked distribution system
    1.
    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。

    SYSTEM AND METHOD FOR SEAMLESS SWITCHING THROUGH BUFFERING
    5.
    发明申请
    SYSTEM AND METHOD FOR SEAMLESS SWITCHING THROUGH BUFFERING 有权
    通过缓冲无缝切换的系统和方法

    公开(公告)号:US20110176553A1

    公开(公告)日:2011-07-21

    申请号:US12911502

    申请日:2010-10-25

    IPC分类号: H04L12/56

    摘要: A method of preparing data streams to facilitate seamless switching between such streams by a switching device to produce an output data stream without any switching artifacts. Bi-directional switching between any plurality of data streams is supported. The data streams are divided into segments, wherein the segments include synchronized starting points and end points. The data rate is increased before an end point of a segment, to create switch gaps between the segments. Increasing the data rate can include increasing a bandwidth of the plurality of data streams, for example by multiplexing, or compressing the data.The present invention can be used, for example, with MPEG or AC-3 encoded audio and MPEG encoded video segments that are multiplexed into MPEG-2 transport streams.Also included are specific methods for preparing MPEG video streams and multiplexing MPEG video with MPEG or AC-3 audio streams to allow a receiver to create seamless transitions between individually encoded segments.

    摘要翻译: 一种准备数据流以促进切换装置在这种流之间无缝切换以产生输出数据流而不产生任何切换伪影的方法。 支持任意多个数据流之间的双向切换。 数据流被分成段,其中段包括同步的起点和终点。 数据速率在段的终点之前增加,以在段之间创建交换机间隙。 增加数据速率可以包括例如通过复用或压缩数据来增加多个数据流的带宽。 本发明可以用于例如MPEG-3编码的MPEG-2编码视频片段,其被复用到MPEG-2传输流中。 还包括用于准备MPEG视频流和用MPEG或AC-3音频流复用MPEG视频的特定方法,以允许接收机在单独编码的段之间创建无缝转换。

    System and method for seamless switching through buffering

    公开(公告)号:US08571051B2

    公开(公告)日:2013-10-29

    申请号:US12911502

    申请日:2010-10-25

    IPC分类号: H04L12/28

    摘要: A method of preparing data streams to facilitate seamless switching between such streams by a switching device to produce an output data stream without any switching artifacts. Bi-directional switching between any plurality of data streams is supported. The data streams are divided into segments, wherein the segments include synchronized starting points and end points. The data rate is increased before an end point of a segment, to create switch gaps between the segments. Increasing the data rate can include increasing a bandwidth of the plurality of data streams, for example by multiplexing, or compressing the data.The present invention can be used, for example, with MPEG or AC-3 encoded audio and MPEG encoded video segments that are multiplexed into MPEG-2 transport streams.Also included are specific methods for preparing MPEG video streams and multiplexing MPEG video with MPEG or AC-3 audio streams to allow a receiver to create seamless transitions between individually encoded segments.

    System and method for seamless switching through buffering
    8.
    发明授权
    System and method for seamless switching through buffering 有权
    通过缓冲无缝切换的系统和方法

    公开(公告)号:US07382796B2

    公开(公告)日:2008-06-03

    申请号:US10369047

    申请日:2003-02-19

    IPC分类号: H04L12/54

    摘要: A method of preparing data streams to facilitate seamless switching between such streams by a switching device to produce an output data stream without any switching artifacts. Bi-directional switching between any plurality of data streams is supported. The data streams are divided into segments, wherein the segments include synchronized starting points and end points. The data rate is increased before an end point of a segment, to create switch gaps between the segments. Increasing the data rate can include increasing a bandwidth of the plurality of data streams, for example by multiplexing, or compressing the data.The present invention can be used, for example, with MPEG or AC-3 encoded audio and MPEG encoded video segments that are multiplexed into MPEG-2 transport streams.Also included are specific methods for preparing MPEG video streams and multiplexing MPEG video with MPEG or AC-3 audio streams to allow a receiver to create seamless transitions between individually encoded segments.

    摘要翻译: 一种准备数据流以促进切换装置在这种流之间无缝切换以产生输出数据流而不产生任何切换伪影的方法。 支持任意多个数据流之间的双向切换。 数据流被分成段,其中段包括同步的起点和终点。 数据速率在段的终点之前增加,以在段之间创建交换机间隙。 增加数据速率可以包括例如通过复用或压缩数据来增加多个数据流的带宽。 本发明可以用于例如MPEG-3编码的MPEG-2编码视频片段,其被复用到MPEG-2传输流中。 还包括用于准备MPEG视频流和用MPEG或AC-3音频流复用MPEG视频的特定方法,以允许接收机在单独编码的段之间创建无缝转换。

    Automatic chain manufacturing system
    10.
    发明授权
    Automatic chain manufacturing system 失效
    自动链制造系统

    公开(公告)号:US3977180A

    公开(公告)日:1976-08-31

    申请号:US602838

    申请日:1975-08-07

    申请人: Richard L. Booth

    发明人: Richard L. Booth

    IPC分类号: B21L3/00

    CPC分类号: B21L3/00

    摘要: An automated system for producing chain wherein individual pins are fed one-at-a-time to a heating station. The pins are heated in stages at said station to a temperature suitable for bending of the pins. The pins are automatically moved from said station by transfer and conveyor means to a bender where the pins are clamped in place and then bent in stages into an open-ended link shape. A robot picks up the link-shaped pins and places the pins one-at-a-time on the supporting surface of a closer. The robot then interlinks a welded link with a pin on the closer, and the pin on th closer is then closed. The robot then moves the closed pin to the welder for welding of the ends.