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公开(公告)号：US4507676A
公开(公告)日：1985-03-26
申请号：US437263
申请日：1982-10-28
摘要： A matrix for digital video signals separates each coefficient into a binary part and a remainder. The binary part can be implemented very simply by a hardwired right shift. The remainder can be implemented using a ROM. Less ROM memory space is required than for implementing the entire coefficient in a ROM.
摘要翻译： 用于数字视频信号的矩阵将每个系数分成二进制部分和余数。 二进制部分可以非常简单地通过硬连线右移来实现。 其余的可以使用ROM来实现。 需要较少的ROM存储空间，而不是在ROM中实现整个系数。
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2.发明授权Hardware reduction by truncation of selected number of most significant bits for digital video system using subsampling and adaptive reconstruction 失效通过使用子采样和自适应重建来截断数字视频系统的选定数目的最高有效位的硬件减少
公开(公告)号：US4340940A
公开(公告)日：1982-07-20
申请号：US181425
申请日：1980-08-26
CPC分类号： H04N19/00 , H04N19/587 , H04N19/59
摘要： In order to reduce the amount of hardware required in comparing 8-bit numbers representing digitized video signals, only the four LSB are compared, since if the numbers differ by more than the four LSB, no comparison is desired. This is done by detecting if any of the four MSB are logic "1", and if so, setting all of the four LSB to logic "1".
摘要翻译： 为了减少比较代表数字化视频信号的8位数所需的硬件数量，只比较4个LSB，因为如果数字差别大于4个LSB，则不需要比较。 这通过检测四个MSB中的任何一个是逻辑“1”来完成，如果是，则将所有四个LSB设置为逻辑“1”。
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公开(公告)号：US4376948A
公开(公告)日：1983-03-15
申请号：US228596
申请日：1981-01-26
CPC分类号： H04N11/042
摘要： A TDM scheme has a Y signal that is sampled at 14.32 MHz and every other sample is discarded. The discarded samples are 180.degree. out-of-phase from line-to-line. I and Q signals are sampled at one half this frequency and every other sample is discarded also 180.degree. out-of-phase from line-to-line on a given line. The discarded samples of Q and I are 180.degree. out-of-phase with respect to each other. This allows insertion of the retained I and Q samples into the retained Y samples to allow multiplexing.
摘要翻译： TDM方案具有在14.32MHz采样的Y信号，并且丢弃每隔一个样本。 丢弃的样品从线到线是180°异相。 I和Q信号在该频率的一半被采样，并且每一个其他样本也被丢弃，在给定行上也从线到谱舍弃180度的异相。 丢弃的Q和I的样品相对于彼此是180°异相。 这允许将保留的I和Q样本插入到保留的Y样本中以允许复用。
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公开(公告)号：US4320416A
公开(公告)日：1982-03-16
申请号：US197290
申请日：1980-10-15
CPC分类号： H04N19/59 , H04N11/042
摘要： An encoder for digital video signals uses averages of pairs of transmitted samples to reconstruct untransmitted samples. The pair selected for reconstruction is selected in accordance with the criteria of least change around the untransmitted sample. If a plurality of averages are tied for least change, a priority order is used to select which average to use. For color video the priority order is preferably the horizontal, diagonal and vertical averages. A different order can be used for monochrome signals.
摘要翻译： 用于数字视频信号的编码器使用传输样本对的平均值来重建未发送的采样。 根据关于未发送样本的最小变化的标准来选择用于重建的对。 如果将多个平均值绑定到最小变化，则使用优先级顺序来选择要使用的平均值。 对于彩色视频，优先顺序优选为水平，对角线和垂直平均值。 单色信号可以使用不同的顺序。
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