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    • 23. 发明授权
    • Television signal scan conversion system with reduced noise sensitivity
    • 电视信号扫描转换系统具有降低的噪声灵敏度
    • US5225907A
    • 1993-07-06
    • US857899
    • 1992-03-26
    • Scott D. CasavantStuart S. Perlman
    • Scott D. CasavantStuart S. Perlman
    • H04N7/01H04N7/00H04N7/08H04N7/081H04N11/00
    • H04N7/007H04N11/008
    • A television signal receiver processes a television signal representing a letterbox image display format with a main image region, and a bar region containing auxiliary "helper" information to help convert from interlaced to progressive scanning. In the presence of image motion, a main image component and the helper component are combined and conveyed to a video processor. In the absence of motion, other image information, e.g., field repeated information, is conveyed to the video processor. The information conveyed to the video processor is determined by a switching network responsive to an control signal from a motion detector which senses low frequency luminance image information substantially exclusive of high frequency image information.
    • 电视信号接收机处理表示具有主图像区域的信箱图像显示格式的电视信号和包含辅助“辅助”信息的条形区域,以帮助从隔行扫描到逐行扫描。 在存在图像运动的情况下,将主图像分量和辅助分量组合并传送到视频处理器。 在没有运动的情况下,将其它图像信息,例如场重复信息传送到视频处理器。 传送到视频处理器的信息由响应来自运动检测器的控制信号的开关网络确定,运动检测器感测基本上不包括高频图像信息的低频亮度图像信息。