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1.发明授权Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal 失效折叠视频信号的高能量反向分量的强调和随后的重新加权公开(公告)号：US06246827B1
公开(公告)日：2001-06-12
申请号：US08087362
申请日：1993-07-08
申请人： Christopher H. Strolle , Allen LeRoy Limberg , Werner F. Wedam , Raymond Schnitzler , Hermann J. Weckenbrock , Jung Wan Ko , Jong Kyung Yun
发明人： Christopher H. Strolle , Allen LeRoy Limberg , Werner F. Wedam , Raymond Schnitzler , Hermann J. Weckenbrock , Jung Wan Ko , Jong Kyung Yun
IPC分类号： H04N979
CPC分类号： H04N5/923 , H04N9/7976 , H04N9/80 , H04N9/8205 , H04N9/835 , H04N9/898
摘要： A system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filtering is done to separate the low-frequency and compressed-in-dynamic-range high-frequency portions of the recovered luminance signal from each other. A corer responds to the separated compressed-in-dynamic-range high-frequency portion of the recovered luminance signal to provide a cored high-frequency portion with expanded dynamic range and reduced noise. The level of the cored high-frequency portion with expanded dynamic range and reduced noise is then boosted by a predetermined amount to compensate for energy losses during the compression of the dynamic range and added back to the low-frequency portion of the recovered luminance signal to reproduce a full-band luminance signal with at least partially restored dynamic range for high-frequencies and without readily visible high-frequency noise.
摘要翻译： 一种用于从包含先前记录的亮度信号的介质再现亮度信号的系统，其中其高频部分在动态范围内被压缩，包括用于从介质中恢复该亮度信号的电路。 完成滤波以将恢复的亮度信号的低频和压缩在动态范围的高频部分彼此分离。 核心部分对恢复的亮度信号的分离压缩在动态范围高频部分进行响应，以提供具有扩展的动态范围和降低的噪声的核心高频部分。 然后将具有扩大的动态范围和降低的噪声的核心高频部分的电平提升预定量，以补偿在动态范围的压缩期间的能量损失，并将其恢复到恢复的亮度信号的低频部分， 再现具有用于高频的至少部分恢复的动态范围的全频带亮度信号，并且没有容易看到的高频噪声。
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2.发明授权Deemphasis & Subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal 失效对重叠视频信号的高能量反向分量进行去加重和随后的重新加权
公开(公告)号：US5673355A
公开(公告)日：1997-09-30
申请号：US484707
申请日：1995-06-07
申请人： Christopher H. Strolle , Allen LeRoy Limberg , Werner F. Wedam , Raymond Schnitzler , Hermann J. Weckenbrock , Jung Wan Ko , Jong Kyung Yun
发明人： Christopher H. Strolle , Allen LeRoy Limberg , Werner F. Wedam , Raymond Schnitzler , Hermann J. Weckenbrock , Jung Wan Ko , Jong Kyung Yun
CPC分类号： H04N9/8205 , H04N5/923 , H04N9/7976 , H04N9/80 , H04N9/835 , H04N9/898
摘要： A system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filtering is done to separate the low-frequency and compressed-in-dynamic-range high-frequency portions of the recovered luminance signal from each other. A corer responds to the separated compressed-in-dynamic-range high-frequency portion of the recovered luminance signal to provide a cored high-frequency portion with expanded dynamic range and reduced noise. The level of the cored high-frequency portion with expanded dynamic range and reduced noise is then boosted by a predetermined amount to compensate for energy losses during the compression of the dynamic range and added back to the low-frequency portion of the recovered luminance signal to reproduce a full-band luminance signal with at least partially restored dynamic range for high-frequencies and without readily visible high-frequency noise.
摘要翻译： 一种用于从包含先前记录的亮度信号的介质再现亮度信号的系统，其中其高频部分在动态范围内被压缩，包括用于从介质中恢复该亮度信号的电路。 完成滤波以将恢复的亮度信号的低频和压缩在动态范围的高频部分彼此分离。 核心部分对恢复的亮度信号的分离压缩在动态范围高频部分进行响应，以提供具有扩展的动态范围和降低的噪声的核心高频部分。 然后将具有扩大的动态范围和降低的噪声的核心高频部分的电平提升预定量，以补偿在动态范围的压缩期间的能量损失，并将其恢复到恢复的亮度信号的低频部分， 再现具有用于高频的至少部分恢复的动态范围的全频带亮度信号，并且没有容易看到的高频噪声。
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3.发明授权Frequency-multiplexing FM luma signal with color and 2nd under signals having overlapping frequency spectra 失效频率复用具有颜色的FM亮度信号和具有重叠频谱的信号
公开(公告)号：US5500739A
公开(公告)日：1996-03-19
申请号：US59765
申请日：1993-05-11
申请人： Christopher H. Strolle , Chandrakant B. Patel , Werner F. Wedam , Raymond Schnitzler , Hermann J. Weckenbrock , Jung-Wan Ko , Jong-Kwung Yun , Allen L. Limberg
发明人： Christopher H. Strolle , Chandrakant B. Patel , Werner F. Wedam , Raymond Schnitzler , Hermann J. Weckenbrock , Jung-Wan Ko , Jong-Kwung Yun , Allen L. Limberg
CPC分类号： H04N9/835 , H04N9/80 , H04N9/8205
摘要： A frequency-multiplexed video signal is generated in which a color-under signal and a second under signal are linearly combined with at least partially overlapping frequency spectra to form a composite under signal for an FM luma signal. The frequency-multiplexed video signal is suited for recording on magnetic tape using helical scanning methods and for being played back from the magnetic tape using helical scanning methods. The second under signal is generated in such way that line-comb filtering can be used during playback to separate color-under signal and second under signal each from the composite signal despite their frequency spectra being at least partially overlapping in the composite signal.
摘要翻译： 产生频率复用的视频信号，其中彩色信号和第二下信号与至少部分重叠的频谱线性组合以形成用于FM亮度信号的复合信号。 频率复用视频信号适用于使用螺旋扫描方法在磁带上进行记录，并且使用螺旋扫描方法从磁带重放。 第二下信号被生成为使得在重放期间可以使用线梳滤波来分离彩色信号和第二下信号，每个来自复合信号，尽管它们的频谱在复合信号中至少部分重叠。
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4.发明授权System for recording and reproducing a wide bandwidth video signal via a narrow bandwidth medium 失效用于通过窄带宽媒体记录和再现宽带宽视频信号的系统
公开(公告)号：US6134373A
公开(公告)日：2000-10-17
申请号：US787690
申请日：1991-11-04
申请人： Christopher H. Strolle , Chandrakant B. Patel , Werner F. Wedam , Jung Wan Ko , Raymond Schnitzler , Jong Kyung Yun
发明人： Christopher H. Strolle , Chandrakant B. Patel , Werner F. Wedam , Jung Wan Ko , Raymond Schnitzler , Jong Kyung Yun
IPC分类号： H04N5/93 , H04N9/78 , H04N9/797 , H04N9/80 , H04N9/82 , H04N9/83 , H04N9/835 , H04N9/84 , H04N9/898 , H04N9/79
CPC分类号： H04N9/831 , H04N9/797 , H04N9/7976 , H04N9/80 , H04N9/8205 , H04N9/835 , H04N9/84 , H04N9/898
摘要： An encoder separates luminance and chrominance signal components of a composite video signal. The frame-to-frame changes in the luminance signal are detected, and a motion signal is derived therefrom. The higher frequency portion of the luminance signal is adaptively de-emphasized in amplitude and folded into the spectrum of the lower frequency portion of the luminance signal, to generate a folded-spectrum luminance signal for modulating the frequency of a luma carrier. In a combined signal, suitable for magnetic recording in accordance with a modified VHS standard, the chrominance signal is translated in frequency to generate a color-under signal in a frequency band below that occupied by the FM luma carrier. The de-emphasized higher frequency portion of the luminance signal, as folded into its lower frequency portion, and encoding of the motion signal onto vacant portions of the frequency band below that occupied by the FM luma carrier in such a magnetic recording facilitate its being compatibly reproduced by conventional VHS reproduction devices. In a wideband reproduction device a decoder demodulates the folded-spectrum luminance signal from the FM luma carrier, unfolds the lumininance signal, and reemphasizes the high frequencies of the unfolded luminance signal. The color-under signal is translated in frequency to regenerate chrominance signal combined with the unfolded luminance signal with its high frequencies re-emphasized to their original amplitude, regenerating a composite signal descriptive of a full bandwidth image. The motion signal is utilized in the encoder for motion-adaptively pre-filtering the input luminance and is recovered in the decoder for motion-adaptively post-filtering the unfolded luminance.
摘要翻译： 编码器分离复合视频信号的亮度和色度信号分量。 检测亮度信号中的帧到帧的变化，并从中导出运动信号。 亮度信号的较高频率部分在幅度上自适应去强调，并折射成亮度信号的较低频率部分的频谱，以产生用于调制亮度载波频率的折射谱亮度信号。 在适合于根据修改的VHS标准的磁记录的组合信号中，色度信号被频率转换，以在低于由FM亮度载波占据的频带内产生下色信号。 亮度信号的去加重的较高频率部分被折叠成其较低频率部分，并且将运动信号编码到在这种磁记录中由FM亮度载波占据的频带以下的频带的空的部分上，便于其兼容 由常规VHS再现设备再现。 在宽带再现装置中，解码器解调来自FM亮度载波的折叠频谱亮度信号，展开亮度信号，并重新强调展开的亮度信号的高频。 彩色信号以频率转换以再现与展开的亮度信号组合的色度信号，其高频被再次强调到其原始幅度，再生描述全带宽图像的复合信号。 运动信号在编码器中用于对输入亮度进行运动自适应预滤波，并在解码器中恢复运动自适应地对展开后的亮度进行后置滤波。
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5.发明授权Deemphasis and subsequent reemphasis of high-energy reversed-spectrum components of a folded video signal 失效折叠视频信号的高能量反向分量的强调和随后的重新加权
公开(公告)号：US5596418A
公开(公告)日：1997-01-21
申请号：US478766
申请日：1995-06-07
申请人： Christopher H. Strolle , Allen L. Limberg , Werner F. Wedam , Raymond Schnitzler , Hermann J. Weckenbrock , Jung W. Ko , Jong K. Yun
发明人： Christopher H. Strolle , Allen L. Limberg , Werner F. Wedam , Raymond Schnitzler , Hermann J. Weckenbrock , Jung W. Ko , Jong K. Yun
CPC分类号： H04N5/923 , H04N9/7976 , H04N9/80 , H04N9/8205 , H04N9/898
摘要： A system for reproducing a luminance signal from a medium containing a previously recorded luminance signal with a high-frequency portion thereof compressed in dynamic range includes a circuit for recovering that luminance signal from the medium. Filtering is done to separate the low-frequency and compressed-in-dynamic-range high-frequency portions of the recovered luminance signal from each other. A corer responds to the separated compressed-in-dynamic-range high-frequency portion of the recovered luminance signal to provide a cored high-frequency portion with expanded dynamic range and reduced noise. The level of the cored high-frequency portion with expanded dynamic range and reduced noise is then boosted by a predetermined amount to compensate for energy losses during the compression of the dynamic range and added back to the low-frequency portion of the recovered luminance signal to reproduce a full-band luminance signal with at least partially restored dynamic range for high-frequencies and without readily visible high-frequency noise.
摘要翻译： 一种用于从包含先前记录的亮度信号的介质再现亮度信号的系统，其中其高频部分在动态范围内被压缩，包括用于从介质中恢复该亮度信号的电路。 完成滤波以将恢复的亮度信号的低频和压缩在动态范围的高频部分彼此分离。 核心部分对恢复的亮度信号的分离压缩在动态范围高频部分进行响应，以提供具有扩展的动态范围和降低的噪声的核心高频部分。 然后将具有扩大的动态范围和降低的噪声的核心高频部分的电平提升预定量，以补偿在动态范围的压缩期间的能量损失，并将其恢复到恢复的亮度信号的低频部分， 再现具有用于高频的至少部分恢复的动态范围的全频带亮度信号，并且没有容易看到的高频噪声。
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6.发明授权Video signal recording system enabling limited bandwidth recording and playback 失效视频信号录制系统可实现有限带宽的录制和播放
公开(公告)号：US5113262A
公开(公告)日：1992-05-12
申请号：US569029
申请日：1990-08-17
申请人： Christopher H. Strolle , Chandrakant B. Patel , Werner F. Wedam , Jung W. Ko , Raymond Schnitzler , Jong K. Yun
发明人： Christopher H. Strolle , Chandrakant B. Patel , Werner F. Wedam , Jung W. Ko , Raymond Schnitzler , Jong K. Yun
CPC分类号： H04N9/8205 , H04N9/7976 , H04N9/80 , H04N9/898
摘要： An improved video signal recording system for recording a full bandwidth video signal on a limited bandwidth medium is disclosed. The recording system includes an encoder, coupled to an input terminal, for adaptively processing a composite video signal in response to a motion representative signal, and producing two signals; a luminance signal, having attenuated high frequencies subsampled so as to be folded into a spectral hole in the low frequencies, and being bandwidth limited to the limited bandwidth of the recording medium; and a combined signal including a chrominance and a motion component. Luminance signal recording circuitry records the folded luminance signal on the medium and chrominance signal recording circuitry records the combined chrominance and motion signal on the medium. An improved video signal playback system for reproducing such a prerecorded video signal is also disclosed. The playback system consists of a luminance signal playback circuit for retrieving the prerecorded luminance signal from the medium, and chrominance signal playback circuit for retrieving the prerecorded combined chrominance and motion signals from the medium. A decorder extracts the motion signal and the chrominance signal from the combined chrominance and motion signal and an unfolding circuit extracts the luminance high frequencies from the prerecorded folded luminance signal and adaptively regenerates the full bandwidth luminance signal in response to the motion signal. This regenerated full bandwidth luminance signal is combined with the chrominance signal to reproduce the originally recorded composite video signal. A recording medium previously recorded by such a recording system is capable of being played back on a standard playback system without objectionably artifacts in the reproduced image.
摘要翻译： 公开了一种用于在有限带宽介质上记录全带宽视频信号的改进的视频信号记录系统。 记录系统包括耦合到输入端的编码器，用于响应运动代表信号自适应地处理复合视频信号，并产生两个信号; 亮度信号，具有被衰减的高频，被采样以被折叠成低频中的频谱孔，并且带宽被限制到记录介质的有限带宽; 以及包括色度和运动分量的组合信号。 亮度信号记录电路将折叠的亮度信号记录在介质上，色度信号记录电路在介质上记录组合的色度和运动信号。 还公开了一种用于再现这种预先记录的视频信号的改进的视频信号播放系统。 播放系统由用于从介质中检索预先记录的亮度信号的亮度信号重放电路和用于从介质中检索预先记录的组合色度和运动信号的色度信号重放电路组成。 解码顺序从组合的色度和运动信号中提取运动信号和色度信号，展开电路从预先记录的折叠亮度信号中提取亮度高频，并根据运动信号自适应地再生全带宽亮度信号。 该再生的全带宽亮度信号与色度信号组合以再现原始记录的复合视频信号。 由这样的记录系统预先记录的记录介质能够在标准的回放系统上进行再现，而不会在再现的图像中产生不必要的伪影。
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公开(公告)号：US4651211A
公开(公告)日：1987-03-17
申请号：US819861
申请日：1986-01-17
申请人： Hermann J. Weckenbrock , Barbara J. Roeder , Robert F. Casey , Leopold A. Harwood , Werner F. Wedam
发明人： Hermann J. Weckenbrock , Barbara J. Roeder , Robert F. Casey , Leopold A. Harwood , Werner F. Wedam
CPC分类号： H04N5/144
摘要： A motion detector for detecting interimage motion represented by composite video signals analyzes both the chrominance and luminance components for image motion. Interimage motion represented by the luminance component is determined from interimage signal differences. The interimage signal differences are separated into high and low frequency spectra corresponding to fine and coarse luminance image detail. Selected signal differences from the low frequency spectrum are summed and threshold detected to determine motion in the coarse image detail. The high frequency spectrum of the sample differences are applied to parallel summing circuits which sum different combinations of sample differences in order to discriminate motion signals from non-moving chrominance transitions. The detection signals from the high and low frequency motion detectors are combined to produce a luminance motion signal. Interimage motion represented by the chrominance component is detected by combining selected ones of interimage signal sums. The interimage signal sums are high pass filtered and applied to parallel combining elements which discriminate chrominance motion from vertical luminance transitions.
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公开(公告)号：US5294979A
公开(公告)日：1994-03-15
申请号：US73478
申请日：1993-06-09
CPC分类号： H04N17/02
摘要： Noise estimation circuitry for estimating the noise in a small number of horizontal scanning lines of a video signal includes a lowpass line comb filter responding to said video signal, but not to chrominance-descriptive components thereof. The video signal free from chrominance-descriptive components is repeatedly sampled during the backporch interval of each horizontal scanning line, and the samples are accumulated to generate a revised noise estimate each successive horizontal scanning line.
摘要翻译： 用于估计视频信号的少量水平扫描线中的噪声的噪声估计电路包括响应于所述视频信号的低通线梳状滤波器，但不对其色度描述的分量。 在每个水平扫描线的后续间隔期间重复采样没有色度描述分量的视频信号，并且累积采样以产生每个连续的水平扫描线的修正的噪声估计。
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公开(公告)号：US4503367A
公开(公告)日：1985-03-05
申请号：US360751
申请日：1982-03-22
CPC分类号： H04N3/233
摘要： An inverter operated at the horizontal deflection frequency is coupled to a source of direct voltage for developing an alternating voltage at an output terminal of the inverter. A capacitor AC couples the alternating voltage to the primary winding of a power transformer for developing alternating polarity supply voltages across secondary windings of the transformer. A horizontal generator generates scanning current in a deflection winding. A third winding of the transformer applies to the deflection winding the alternating polarity voltage developed across the third winding. The control circuit of the inverter is responsive to a deflection rate voltage synchronized with scanning current generation for synchronizing operation of the inverter so as to enable the third winding to provide substantial linearity correction to the scanning current. The value of the coupling capacitor is chosen to produce a change in the waveshape of the inverter alternating voltage as it is coupled to the primary winding so as to enhance the linearity correction being provided by the transformer third winding.
摘要翻译： 以水平偏转频率工作的逆变器被耦合到直流电压源，用于在逆变器的输出端产生交流电压。 电容器AC将交流电压耦合到电力变压器的初级绕组，用于在变压器的次级绕组上形成交替的极性电源电压。 水平发生器在偏转绕组中产生扫描电流。 变压器的第三绕组适用于偏转绕组，跨越第三绕组产生交变极性电压。 逆变器的控制电路响应于与扫描电流产生同步的偏转电压电压，以使逆变器的同步操作，使得第三绕组能够对扫描电流提供实质的线性校正。 选择耦合电容器的值，以在其连接到初级绕组时产生变换器交流电压的波形变化，以便增强由变压器第三绕组提供的线性校正。
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10.发明授权Method and apparatus for generating a playback clock from a 2.5 MHz chroma PLL 失效用于从2.5MHz色度PLL产生回放时钟的方法和装置
公开(公告)号：US5097347A
公开(公告)日：1992-03-17
申请号：US607709
申请日：1990-11-01
申请人： Werner F. Wedam , Alvin Balaban
发明人： Werner F. Wedam , Alvin Balaban
摘要： In a video cassette recorder (VCR) including a video signal processing system having a source of a reference signal having a first frequency of 2.517 MHz, a clock signal generating circuit comprises a first frequency multiplier circuit of a balanced modulator type, having an input coupled to the source of a reference signal and having an output for providing a signal including a component having a second frequency of twice the first frequency. A filter arrangement has an input coupled to the output of the first frequency multiplier circuit, has an output, and has a response characteristic peak substantially at the second frequency. A second frequency multiplier circuit of a balanced modulator type, has an input coupled to the output of the bandpass filter arrangement and has an output for providing a signal including a component having a third frequency of twice the second frequency.
摘要翻译： 在包括具有第一频率为2.517MHz的参考信号源的视频信号处理系统的录像机（VCR）中，时钟信号发生电路包括平衡调制器类型的第一倍频电路，具有输入耦合 具有用于提供包括具有第二频率的第二频率的分量的信号的输出的参考信号的源。 滤波器装置具有耦合到第一倍频电路的输出的输入，具有输出，并且具有基本上处于第二频率的响应特性峰。 平衡调制器类型的第二倍频器电路具有耦合到带通滤波器装置的输出的输入，并且具有用于提供包括具有第二频率的两倍的第三频率的分量的信号的输出的输出。
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