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    • 36. 发明授权
    • Spatial-temporal frequency interleaved processing of a television signal
with reduced amplitude interleaved sections
    • 具有减小的交织部分的电视信号的时空频率交织处理
    • US4621286A
    • 1986-11-04
    • US615094
    • 1984-05-29
    • Glenn A. ReitmeierCurtis R. Carlson
    • Glenn A. ReitmeierCurtis R. Carlson
    • H04N7/12H04N7/00
    • H04N7/12
    • The image represented by a video signal contains an associated image spectrum defined within a spatial-temporal frequency volume. From this video signal, a second video signal is produced that represents spatial-temporal carrier modulation of a spectral section of the image spectrum into an interleaved location adjacent the image spectrum. To reduce the visibility of aliasing artifacts, the interleaved spectral section is made to be of reduced amplitude relative to its original amplitude in the image spectrum. To reconstruct the spatial-temporal frequency spectrum of the image at the television receiver, the video signal containing the frequency interleaved spectrum is processed in a complementary manner that represents spatial-temporal carrier modulation of the interleaved section to restore that section to its original position in the image spectrum. At the same time, the amplitude of the restored section is increased.
    • 由视频信号表示的图像包含在空间 - 时间频率体积内定义的相关图像频谱。 从该视频信号,产生第二视频信号,其将图像频谱的频谱段的空间 - 时间载波调制表示为与图像频谱相邻的交织位置。 为了降低混叠伪影的可视性,将交织的频谱部分相对于其在图像频谱中的原始幅度减小。 为了重建电视接收机的图像的空间 - 时间频谱,包含频率交织频谱的视频信号以互补方式处理,表示交织部分的空间 - 时间载波调制,以将该部分恢复到其原始位置 图像光谱。 同时,恢复部分的幅度增加。
    • 39. 发明授权
    • Digital television signal processing system
    • 数字电视信号处理系统
    • US4502074A
    • 1985-02-26
    • US319459
    • 1981-11-09
    • Glenn A. Reitmeier
    • Glenn A. Reitmeier
    • H04N9/66H04N9/64H04N9/78H04N11/04H04N9/535
    • H04N9/646
    • A system is provided for filtering and demodulating digital color mixture signals, wherein the signals are filtered to remove out-of-band noise prior to completion of the demodulation process. Interleaved digital chrominance signal samples are first demodulated by a signal related in frequency to the video subcarrier to obtain interleaved color mixture signal samples of different sampling phases at baseband frequencies. The interleaved color mixture signal samples are applied to a digital filter at a rate which is a multiple of the color subcarrier frequency. The weighting coefficients of the filter are selected to obtain a bandwidth which passes the color mixture signal while removing out of band noise. Since the input signal sequence to the digital filter contains interleaved color mixture signal samples, alternate stages of the filter shift register are tapped, so that the output sequence will comprise filtered and interleaved color mixture signal samples. An output sampling switch accomplishes phase demodulation of the output sequence by selecting samples at a reduced sampling rate in accordance with the Nyquist criterion of the color signals and produces either one or two output sequences of filtered and fully demodulated color mixture signals. Tapped shift register stages of the digital filter may be coupled to two different sets of weighting coefficients and signal combining stages. The filter outputs may thus exhibit unequal bandwidths for filtered color mixture signals, which are commensurate with the desired bandwidths of the filtered signals.
    • 提供了一种用于对数字彩色混合信号进行滤波和解调的系统,其中在完成解调过程之前,对信号进行滤波以去除带外噪声。 交织的数字色度信号样本首先通过频率与视频副载波相关的信号解调,以获得基带频率处的不同采样相位的交错混合信号样本。 将交错的混合混合信号样本以彩色副载波频率的倍数的速率施加到数字滤波器。 选择滤波器的加权系数以获得在去除带外噪声的同时通过混合信号的带宽。 由于到数字滤波器的输入信号序列包含交错色混合信号采样,滤波器移位寄存器的替代级被抽头,使得输出序列将包括滤波和交错的混合混合信号采样。 输出采样开关通过根据彩色信号的奈奎斯特准则选择采样率降低的样本,实现输出序列的相位解调,并产生滤波和完全解调的混合信号的一个或两个输出序列。 数字滤波器的抽头移位寄存器级可耦合到两组不同的加权系数和信号组合级。 因此,滤波器输出可能对于经滤波的信号的期望带宽相当于滤波的混合混合信号呈现不等的带宽。