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    • 1. 发明申请
    • Horizontal sync pulse detection for video signal decoding
    • 水平同步脉冲检测用于视频信号解码
    • US20050134732A1
    • 2005-06-23
    • US10746921
    • 2003-12-23
    • Havard ScottPeter MurdockLior Levin
    • Havard ScottPeter MurdockLior Levin
    • H04N5/10H04N5/08
    • H04N5/10
    • Methods and systems are described for determining a slice level used for detecting an edge of a horizontal sync pulse of a horizontal line of a video signal, where the horizontal line has a plurality of samples. An exemplary method comprises low-pass filtering the video signal to generate a plurality of filtered samples; determining a first level, wherein a predetermined number of the plurality of filtered samples have levels above the first level; determining a second level, wherein the second level is a minimum level of levels for the plurality of filtered samples; and determining the slice level by adding the first level and the second level to generate a summed level, and dividing the summed level by two to determine the slice level.
    • 描述了用于确定用于检测视频信号的水平行的水平同步脉冲的边缘的限幅电平的方法和系统,其中水平线具有多个采样。 一种示例性方法包括对视频信号进行低通滤波以产生多个滤波样本; 确定第一电平,其中所述多个滤波样本的预定数量具有高于所述第一电平的电平; 确定第二级别,其中所述第二级别是所述多个经过滤样本的最低级别级别; 以及通过添加所述第一电平和所述第二电平来确定所述限幅电平以产生相加电平,并且将所述加和电平除以2以确定所述限幅电平。
    • 4. 发明授权
    • Satellite transcoder
    • 卫星代码转换器
    • US07564892B1
    • 2009-07-21
    • US10611400
    • 2003-06-30
    • Mats LidstromLior LevinAbraham Krieger
    • Mats LidstromLior LevinAbraham Krieger
    • H04B3/36
    • H04B1/18H04N21/2383H04N21/4382
    • A transcoder is described for converting a received first digital signal with a first modulation and encoding scheme to a second digital signal with a second modulation and encoding scheme. The transcoder may include a demodulator that produces a demodulated digital stream of data from the received first digital signal and a modulator in signal communication with the demodulator, where the modulator modulates the digital stream of data with the second modulation and encoding scheme. Additionally, the transcoder may include an upconverter in signal communication with the modulator, where the upconverter produces the second digital signal.
    • 描述了一种代码转换器,用于利用第二调制和编码方案将接收到的具有第一调制和编码方案的第一数字信号转换为第二数字信号。 代码转换器可以包括解调器,其从接收到的第一数字信号产生解调的数字数据流,以及调制器与解调器进行信号通信,其中调制器利用第二调制和编码方案对数字数据流进行调制。 此外,代码转换器可以包括与调制器进行信号通信的上变频器,其中上变频器产生第二数字信号。
    • 7. 发明授权
    • Horizontal sync pulse detection for video signal decoding
    • 水平同步脉冲检测用于视频信号解码
    • US07098961B2
    • 2006-08-29
    • US10746921
    • 2003-12-23
    • Havard L. ScottPeter M. MurdockLior Levin
    • Havard L. ScottPeter M. MurdockLior Levin
    • H04N5/10H04N5/08
    • H04N5/10
    • Methods and systems are described for determining a slice level used for detecting an edge of a horizontal sync pulse of a horizontal line of a video signal, where the horizontal line has a plurality of samples. An exemplary method comprises low-pass filtering the video signal to generate a plurality of filtered samples; determining a first level, wherein a predetermined number of the plurality of filtered samples have levels above the first level; determining a second level, wherein the second level is a minimum level of levels for the plurality of filtered samples; and determining the slice level by adding the first level and the second level to generate a summed level, and dividing the summed level by two to determine the slice level.
    • 描述了用于确定用于检测视频信号的水平行的水平同步脉冲的边缘的限幅电平的方法和系统,其中水平线具有多个采样。 一种示例性方法包括对视频信号进行低通滤波以产生多个滤波样本; 确定第一电平,其中所述多个滤波样本的预定数量具有高于所述第一电平的电平; 确定第二级别,其中所述第二级别是所述多个经过滤样本的最低级别级别; 以及通过添加所述第一电平和所述第二电平来确定所述限幅电平以产生相加电平,并将所述加和电平除以2以确定所述限幅电平。