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    • 3. 发明授权
    • Video luminance chrominance separation
    • 视频亮度色度分离
    • US08248536B2
    • 2012-08-21
    • US12296357
    • 2006-04-07
    • Dongsheng WuRobert B. ProzorovHuijuan LiuChristopher D. JuradoDaniel ZhuBinning Chen
    • Dongsheng WuRobert B. ProzorovHuijuan LiuChristopher D. JuradoDaniel ZhuBinning Chen
    • H04N9/77H04N9/78H04N9/68
    • H04N11/186H04N9/78
    • The invention provides techniques for separating luma and chroma signal components in a composite SECAM video signal. During reception, the SECAM video signal is split into luma and chroma output. The amplitude of the chroma carrier is monitored during reception. If the chroma carrier amplitude is greater than a threshold, the value of the chroma output can be reduced. Also, if the chroma carrier amplitude is greater than another threshold, a portion of the chroma carrier can be added to the luma; or the trap band of the band-trap filter for extracting luma from the composite video can be reduced. The respective amount of the reduction in the chroma output and the increase in the luma output are independently determined but both may proportional to the magnitude of the deviation in the chroma carrier amplitude from the different thresholds.
    • 本发明提供了用于分离复合SECAM视频信号中的亮度和色度信号分量的技术。 在接收期间,SECAM视频信号被分为亮度和色度输出。 在接收期间监视色度载波的幅度。 如果色度载波振幅大于阈值,则色度输出的值可以减小。 另外,如果色度载波振幅大于另一个阈值,则色度载体的一部分可以被加到亮度上; 或者可以减少用于从复合视频中提取亮度的带通滤波器的陷波带。 独立地确定色度输出的降低和亮度输出的增加的相应量,但都可以与色度载波振幅与不同阈值的偏差的大小成比例。