Method and system for recognition of broadcast segments
    132.
    发明授权
    Method and system for recognition of broadcast segments 失效
    识别广播片段的方法和系统

    公开(公告)号:US5621454A

    公开(公告)日:1997-04-15

    申请号:US481815

    申请日:1995-06-07

    Abstract: The present invention relates to a method of producing a signature characterizing an interval of a video signal representing a picture for use in broadcast segment recognition. The signature is produced based on portions of the video signal representing corresponding regions of the picture. The invention also serves to produce a corresponding mast word including a plurality of bit values each representing a reliability of a corresponding value of the signature. The first signature is formed having a plurality of values each of which is based on a respective one of the portions of the video signal. A second signature is formed also having a plurality of values each based on respective ones of a plurality of shifted portions of the video signal. The shifted portions each corresponds to a respective one of the video signal portions and has a location displaced from a location of the respective one of the portions by a predetermined amount, such that each value of the first signature corresponds to a value of the second signature. The respective values of the first and second signatures are compared and bit values of the mask word are established based on this comparison.

    Abstract translation: 本发明涉及一种产生表征用于广播段识别的图像的视频信号的间隔的签名的方法。 基于表示图像的相应区域的视频信号的部分产生签名。 本发明还用于产生包括多个比特值的对应的桅杆词,每个比特值表示签名的相应值的可靠性。 第一签名被形成为具有多个值,每个值基于视频信号的相应一个部分。 形成第二签名,其也具有基于视频信号的多个移位部分中的相应的多个值的多个值。 移位部分各自对应于视频信号部分中的相应一个,并且具有从相应一个部分的位置偏移预定量的位置,使得第一个签名的每个值对应于第二签名的值 。 比较第一和第二签名的各个值,并基于该比较建立掩码字的位值。

    Method and system for recognition of broadcast segments
    134.
    发明授权
    Method and system for recognition of broadcast segments 失效
    识别广播片段的方法和系统

    公开(公告)号:US5436653A

    公开(公告)日:1995-07-25

    申请号:US876578

    申请日:1992-04-30

    Abstract: Broadcast segment recognition systems and methods are provided in which a signature representing a monitored broadcast segment is compared with broadcast segment signatures in a data base representing known broadcast segments to determine whether a match exists. Criteria for determining the validity of such a match are provided. In addition, signatures characterizing respective intervals of a broadcast signal exhibiting correlation are produced by generating a difference vector for each respective interval and carrying out vector transformations of the different vectors to reduce such correlation. Also, a broadcast segment recognition data base is updated by monitoring a broadcast signal to detect signal events indicating possible broadcast segments of interest in which at least two alternative segments of interest are detected by assigning priority to one of the two segments based upon predetermined criteria. A signature characterizing a broadcast signal interval is produced including a plurality of digital words each characterizing a respective sub-interval thereof by selecting at least one such digital word based on predetermined digital word distribution criteria, match probability and a degree of signal difference between the respective sub-interval and adjacent portions of the signal.

    Abstract translation: 提供了广播段识别系统和方法,其中表示监视的广播段的签名与表示已知广播段的数据库中的广播段签名进行比较,以确定是否存在匹配。 提供了确定这种匹配的有效性的标准。 此外,通过产生每个相应间隔的差分矢量并执行不同矢量的矢量变换来产生表征相关性的广播信号的相应间隔的特征,以减少这种相关性。 此外,通过监视广播信号来更新广播段识别数据库,以基于预定标准,通过将优先级分配给两个段之一来检测信号事件,该信号事件指示可能的广播段,其中感兴趣的至少两个替代段被检测。 产生表征广播信号间隔的签名,包括通过基于预定的数字字分配标准选择至少一个这样的数字字来表征其相应子间隔的多个数字字,匹配概率和相应的数字字之间的信号差异程度 子间隔和信号的相邻部分。

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