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    • 5. 发明授权
    • Video signal processor for generating a progressive scanning format
signal
    • 用于产生逐行扫描格式信号的视频信号处理器
    • US6037990A
    • 2000-03-14
    • US83104
    • 1998-05-22
    • Yoshihiko OgawaHisakatsu Ito
    • Yoshihiko OgawaHisakatsu Ito
    • H04N7/01
    • H04N7/0112H04N7/012
    • A video signal processor for preventing image damage resulting from when a first signal and a second signal are converted into each other. When a first signal (an interlaced scanning format signal) is inputted, according to a mode discriminating signal from a mode discriminator, a mixer/selector receives the motion detecting signal from the mode discriminator, adaptively mixes both outputs of a delay circuit and a line interpolating filter (IPF) and uses the combined outputs as an interpolation signal. When a second signal (a progressive scanning format signal converted to an interlaced scanning format signal) is inputted, the mixer/selector selects either the output of the second signal or the output of a delay circuit according to the mode discriminating signal and the field indexes from the mode discriminator and makes it as an interpolation signal. When an input signal is converted from a first signal to a second signal, the mixer/selector receives the motion detecting signal from the mode discriminator and selects the output from the line interpolating filter as an interpolation signal (intra-field interpolation) for at least one field of the changed-over signal according to the mode discriminating signal from the mode discriminator.
    • 一种视频信号处理器,用于防止当第一信号和第二信号彼此转换时产生的图像损坏。 当输入第一信号(隔行扫描格式信号)时,根据来自模式识别器的模式鉴别信号,混频器/选择器从模式识别器接收运动检测信号,自适应地混合延迟电路的两个输出和一行 内插滤波器(IPF),并使用组合输出作为内插信号。 当输入第二信号(逐行扫描格式信号转换为隔行扫描格式信号)时,混频器/选择器根据模式鉴别信号和场指数选择第二信号的输出或延迟电路的输出 从模式鉴别器将其作为内插信号。 当输入信号从第一信号转换成第二信号时,混频器/选择器接收来自模式识别器的运动检测信号,并选择来自线内插滤波器的输出作为内插信号(场内插值)至少 根据来自模式识别器的模式鉴别信号,转换信号的一个场。