公开(公告)号：US5253043A

公开(公告)日：1993-10-12

申请号：US781894

申请日：1991-10-24

申请人： Joel D. Gibson

发明人： Joel D. Gibson

IPC分类号： H04N9/64 ,  H04N11/02

CPC分类号： H04N9/64

摘要： A digital processing system for providing spectral headroom to accommodate harmonic distortion components resulting from non-linear processing of digitized samples of video signals is shown. A standard set of video signal samples are all upsampled and filtered so that they have a common sampling rate. These are filtered to provide spectral headroom. Non-linear operations are then performed on the upsampled and filtered sequences. After processing, the processed upsampled signals are filtered to remove the harmonic components, and then the signals are decimated to reestablish their original sampling rates. This provides non-linear processing for signal sequences which were originally band limited, yet avoids the appearance of aliased frequencies in the output that normally result from harmonic distortion components generated by non-linear processing.

摘要翻译： 示出了用于提供频谱余量以适应由视频信号的数字化样本的非线性处理产生的谐波失真分量的数字处理系统。 一组标准的视频信号样本都被上采样和滤波，使它们具有一个共同的采样率。 这些被滤波以提供频谱余量。 然后对上采样和滤波的序列执行非线性运算。 处理后，对经过处理的上采样信号进行滤波，去除谐波成分，然后将信号抽取，重新建立原始采样率。 这为原始带限制的信号序列提供非线性处理，但是避免了通常由通过非线性处理产生的谐波失真分量产生的输出中的混叠频率的出现。

公开(公告)号：US06469747B1

公开(公告)日：2002-10-22

申请号：US09389150

申请日：1999-09-02

申请人： Sanjay Devappa Rai ,  Joel D. Gibson

发明人： Sanjay Devappa Rai ,  Joel D. Gibson

IPC分类号： H04N974

CPC分类号： H04N9/76 ,  H04N5/265

摘要： A video signal mixer with a parabolic signal mixing function, especially useful in scene-by-scene color correction systems and “blue screen” video masking applications. The mixer effects mixing two independent signal sources while smoothly controlling the rate of change during mixing. An input stage receives a first video signal and a second video signal. The mixing circuit mixes the first video signal with the second video signal based on a predetermined parabolic function. An aperture signal circuit in the mixer allows a degree of operator control over the parabolic function. An output stage provides a parabolized output signal. The output signal, which comprises the mixture of the first video signal and the second video signal, eliminates discontinuities in regions of the signal which would otherwise produce discontinuities in prior art types of video signal mixers.

摘要翻译： 具有抛物线信号混合功能的视频信号混合器，特别适用于逐场色彩校正系统和“蓝屏”视频屏蔽应用。 混合器将混合两个独立的信号源，同时平稳地控制混合期间的变化率。 输入级接收第一视频信号和第二视频信号。 混合电路基于预定的抛物线函数将第一视频信号与第二视频信号混合。 混合器中的孔径信号电路允许一定程度的操作者控制抛物线功能。 输出级提供抛物线输出信号。 包括第一视频信号和第二视频信号的混合的输出信号消除了在现有技术类型的视频信号混合器中否则将产生不连续性的信号区域中的不连续性。