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    Method and system for decoding data in the horizontal overscan portion of a video signal
    4.
    发明授权
    Method and system for decoding data in the horizontal overscan portion of a video signal 失效
    用于对视频信号的水平过扫描部分中的数据进行解码的方法和系统

    公开(公告)号：US06556247B1

    公开(公告)日：2003-04-29

    申请号：US09475834

    申请日：1999-12-30

    申请人： Craig S. Ranta ,  Leonardo G. Del Castillo

    发明人： Craig S. Ranta ,  Leonardo G. Del Castillo

    IPC分类号： H04N708

    CPC分类号： H04N7/163 ,  H04N5/44 ,  H04N7/085 ,  H04N21/43637

    摘要： The present invention relate to method and apparatus for processing a video signal to decode data previously encoded into the video signal. One aspect of the invention relates to a method for detecting a first line of a data sequence encoded in a digital video signal by scanning a digital video signal by line to look for an intelligent signal detect word. If the detect word is not found, a counter is incremented. Scanning continues until the intelligent signal detect word is found, and once found flagging that line as a first data line. Another aspect of the invention is a decoding apparatus that searches the plurality of horizontal scan lines in a video signal for the presence of a data start key, and when such a data start key is found, the line containing the data start key is identified as the first line of the encoded data.

    摘要翻译： 本发明涉及用于处理视频信号以对先前编码为视频信号的数据进行解码的方法和装置。 本发明的一个方面涉及一种通过逐行扫描数字视频信号来检测数字视频信号中编码的数据序列的第一行以寻找智能信号检测字的方法。 如果没有找到检测字，计数器增加。 扫描继续，直到找到智能信号检测字，并且一旦发现将该行标记为第一条数据线。 本发明的另一方面是一种在视频信号中搜索多个水平扫描线以存在数据开始键的解码装置，并且当找到这样的数据开始键时，包含数据开始键的行被标识为 编码数据的第一行。

    Method and apparatus for decoding data encoded in the horizontal overscan portion of a video signal
    5.
    发明授权
    Method and apparatus for decoding data encoded in the horizontal overscan portion of a video signal 有权
    用于解码在视频信号的水平过扫描部分中编码的数据的方法和装置

    公开(公告)号：US06281939B1

    公开(公告)日：2001-08-28

    申请号：US09191400

    申请日：1998-11-12

    申请人： Leonardo G. Del Castillo ,  Douglas Beck

    发明人： Leonardo G. Del Castillo ,  Douglas Beck

    IPC分类号： H04N546

    CPC分类号： H04N7/085 ,  A63H2200/00 ,  G09B5/065 ,  H04N7/035

    摘要： A method and apparatus for decoding data encoded in the horizontal overscan portion of a video signal. A video data detector is configured to decode data encoded in a video signal in a first type of video signal format, such as NTSC. When the detector receives the video signal, it enters a “fast acquisition” loop in which it attempts to decode a sequence of valid data from several consecutive frames of the video signal. If the detector cannot decode a sequence of valid data from the consecutive frames of the video signal, the detector is reconfigured to decode data encoded in the video signal in a second type of video signal format, such as PAL. The detector then attempts to decode a sequence of valid data from the next several consecutive frames of the video signal. If the detector is unable to decode a sequence of valid data from the consecutive frames, the detector is reconfigured for the first type of video signal format and the above process repeats. If the detector decodes a sequence of valid data in the several consecutive frames of the video signal, the detector enters a “controlled persistence” loop. In the controlled persistence loop, the detector continues to decode data until it fails to decode valid data from a series of consecutive video frames. When the detector fails to decode data from a series of consecutive video frames, the detector reenters the fast acquisition loop.

    摘要翻译： 一种用于对视频信号的水平过扫描部分中编码的数据进行解码的方法和装置。 视频数据检测器被配置为对第一类视频信号格式（例如NTSC）中的编码在视频信号中的数据进行解码。 当检测器接收到视频信号时，它进入“快速采集”循环，在该循环中，它尝试从视频信号的几个连续帧中解码有效数据序列。 如果检测器不能从视频信号的连续帧解码有效数据序列，则重新配置检测器以第二类视频信号格式（例如PAL）对视频信号中编码的数据进行解码。 然后，检测器尝试从视频信号的下几个连续帧中解码有效数据序列。 如果检测器不能从连续帧解码有效数据序列，则重新配置检测器用于第一类视频信号格式，并重复上述过程。 如果检测器对视频信号的几个连续帧中的有效数据序列进行解码，则检测器进入“受控持续”循环。 在受控持续循环中，检测器继续解码数据，直到它无法从一系列连续的视频帧中解码有效数据。 当检测器无法从一系列连续的视频帧中解码数据时，检测器重新进入快速采集环路。