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

IPC分类号： H04N9/797 ,  H04N9/80 ,  H04N9/82 ,  H04N9/898

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。

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

IPC分类号： H04N5/923 ,  H04N9/797 ,  H04N9/80 ,  H04N9/82 ,  H04N9/898 ,  H04N9/79

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。

公开(公告)号：US5321507A

公开(公告)日：1994-06-14

申请号：US711981

申请日：1991-06-07

申请人： Jung W. Ko ,  Christopher H. Strolle

发明人： Jung W. Ko ,  Christopher H. Strolle

IPC分类号： H04N19/00 ,  H04N5/14 ,  H04N7/18 ,  H04N9/78 ,  H04N9/797 ,  H04N11/04 ,  H04N19/423 ,  H04N19/80

CPC分类号： H04N5/144 ,  H04N7/18 ,  H04N9/7976

摘要： A motion signal detection circuit adapted to a video recording/reproducing apparatus having a frequency unfolding circuit for unfolding a luminance signal of a high frequency component included in the luminance signal of a low frequency component into an original frequency band, comprising a prefilter for eliminating the folding carrier and sidebands thereof included in the video signal unfolded by the frequency unfolding circuit, a comb filter for filtering the output of the prefilter to detect a motion signal, an error compensation circuit for compensating the errors included in the motion signal output from the comb filter.

摘要翻译： 一种运动信号检测电路，适用于具有用于将低频分量的亮度信号中包括的高频分量的亮度信号展开为原始频带的频率解折叠电路的视频记录/再现装置，包括用于消除 折叠载体及其边带包括在由频率展开电路展开的视频信号中;梳状滤波器，用于滤波预滤波器的输出以检测运动信号;误差补偿电路，用于补偿由梳子输出的运动信号中包括的误差 过滤。

公开(公告)号：US5623573A

公开(公告)日：1997-04-22

申请号：US157340

申请日：1993-11-24

申请人： Christopher H. Strolle ,  Jung W. Ko

发明人： Christopher H. Strolle ,  Jung W. Ko

IPC分类号： H04N5/782 ,  G11B5/02 ,  G11B5/027 ,  G11B20/02 ,  H04N5/7826 ,  H04N5/926 ,  H04N9/79 ,  H04N9/804 ,  H04N9/82 ,  H04N9/83 ,  H04N5/78

CPC分类号： H04N5/78263 ,  H04N9/7925 ,  H04N5/78206 ,  H04N5/9264 ,  H04N9/8042 ,  H04N9/8227 ,  H04N9/83

摘要： A magnetic tape recording with a new signal-encoding format, apparatus for recording this format and reproducing apparatus for reproducing signals from this format. A standard VHS signal is recorded as a first set of parallel slant tracks having a predetermined space between each slant track. A high definition television signal is recorded in pairs of slant tracks of a second type that flank a slant track of first type and are narrower in width than the slant track of first type they flank. Additionally, the azimuth angle of the tracks of first type alternates between different predetermined values for successive tracks, and the azimuth angle of the tracks of second type differ both from the azimuth angle of the track of the first type they flank and from the azimuth angle of the tracks of second type which are positioned next to them in the space between the tracks of first type. This format allows one tape to record both a high-definition television signal and a standard VHS signal, which standard VHS signal can be played back using ordinary VHS tape machines. Accordingly, this format provides a way to avoid the problem of having to carry a dual inventory of tapes in a tape sales or rental business.

摘要翻译： 具有新的信号编码格式的磁带记录，用于记录该格式的装置和用于从该格式再现信号的再现装置。 标准VHS信号被记录为在每个倾斜轨道之间具有预定空间的第一组平行倾斜轨迹。 高清晰度电视信号被记录在第二类型的倾斜轨道对中，该第二类倾斜轨道位于第一类型的倾斜轨道的侧面，并且宽度窄于其侧翼的第一类型的倾斜轨道。 此外，第一类型的轨道的方位角在连续轨道的不同预定值之间交替，并且第二类型的轨道的方位角与其侧翼的第一类型的轨道的方位角和方位角 的第二类型的轨道，它们位于它们之间的第一类型的轨道之间的空间中。 这种格式允许一个磁带录制高分辨率电视信号和标准VHS信号，标准VHS信号可以使用普通的VHS磁带机进行播放。 因此，该格式提供了一种避免在磁带销售或租赁业务中携带磁带的双重盘点的问题的方法。

公开(公告)号：US5355227A

公开(公告)日：1994-10-11

申请号：US832911

申请日：1992-02-07

申请人： Jung W. Ko ,  Christopher H. Strolle

发明人： Jung W. Ko ,  Christopher H. Strolle

IPC分类号： H04N5/922 ,  G11B20/10 ,  H04N5/92 ,  H04N5/93 ,  H04N9/797 ,  H04N5/76

CPC分类号： H04N5/93 ,  H04N9/7976

摘要： An apparatus and a method for reproducing television images from recordings of folded-spectrum video signals uses a zero-crossing detector to convert an FM signal encoding folded-spectrum luminance signal to a PPM signal having the folded-spectrum luminance signal in its baseband, accompanied by the harmonics of the FM carrier and their respective sidebands. The PPM signal is digitized by an analog-to-digital converter, after passage through an anti-aliasing filter that is used to suppress only higher frequencies that would otherwise be sampled at less than Nyquist rate during digitization. Except for this anti-aliasing filtering, the suppression of the harmonics of the FM carrier and their respective sidebands is deferred until after digitization. Linear-phase digital filtering is then used to suppress the harmonics of the FM carrier and their respective sidebands, and the folded-spectrum luminance signal supplied in response to this digital filtering is unfolded to restore it to its original full bandwidth. This procedure permits the group delay characteristic below the folding-carrier frequency to be kept constant, thereby avoiding phase error as would interfere with the unfolding of the folded signal into the original full bandwidth.

摘要翻译： 一种用于从折叠频谱视频信号的记录中再现电视图像的装置和方法使用过零检测器将编码折射谱亮度信号的FM信号转换为在其基带中具有折射谱亮度信号的PPM信号，伴随着 通过FM载波及其各自的边带的谐波。 在通过抗混叠滤波器之后，PPM信号由模数转换器数字化，该抗混叠滤波器仅用于抑制在数字化期间以小于奈奎斯特速率采样的较高频率。 除了这种抗混叠滤波之外，FM载波及其相应边带的谐波抑制推迟到数字化之后。 然后使用线性相位数字滤波来抑制FM载波及其各自的边带的谐波，并且响应于该数字滤波提供的折叠频谱亮度信号被展开以将其恢复到其原始的全带宽。 该过程允许低于折叠载波频率的组延迟特性保持恒定，从而避免相位误差，这将干扰折叠信号到原始全带宽的展开。

公开(公告)号：US5412481A

公开(公告)日：1995-05-02

申请号：US839542

申请日：1992-02-24

申请人： Jung W. Ko ,  Alvin R. Balaban ,  Christopher H. Strolle

发明人： Jung W. Ko ,  Alvin R. Balaban ,  Christopher H. Strolle

IPC分类号： H04N5/956 ,  H04N5/935 ,  H04N9/79 ,  H04N9/797 ,  H04N9/82 ,  H04N9/83 ,  H04N9/84 ,  H04N9/896 ,  H04N9/898

CPC分类号： H04N9/797 ,  H04N9/7904 ,  H04N9/84 ,  H04N9/896 ,  H04N5/935 ,  H04N9/7921 ,  H04N9/8205 ,  H04N9/83 ,  H04N9/898

摘要： A video recording/playback system includes in its recording electronics time-base correctors both for luma signal and for color-under signal, the time-base corrector for luma signal being used to facilitate comb filtering and the time-base corrector for chroma signal being used to maintain luma/chroma tracking during recording. The video recording/playback system includes in its playback electronics time-base correctors both for played-back luma signal and for played-back color-under signal, the time-base corrector for played-back luma signal being used to facilitate comb filtering and the time-base corrector for played-back chroma signal being used to maintain luma/chroma tracking during playback. With appropriate switching, the same pair of time-base correctors can be used in both the recording and the playback electronics of a video recording/playback system. A detector in the recording electronics determines when there is substantial time-base error in the video signal received for recording and conditions the comb filtering of the luma signal during recording to be carried out in just the spatial domain and not in the frame-to-frame time domain. The recording electronics includes circuitry for signaling the playback electronics, via a recorded signal, that the comb filtering of the luma signal during recording was carried out in just the spatial domain and not in the frame-to-frame time domain. The playback electronics responds to such signaling to adapt the comb filtering of the played-back luma signal to suit.

摘要翻译： 视频记录/回放系统在其记录电子装置中包括用于亮度信号和彩色信号的时基校正器，用于亮度信号的时基校正器用于促进梳状滤波，并且色度信号的时基校正器 用于在录制过程中维持亮度/色度跟踪。 视频记录/回放系统在其回放电子装置中包括用于回放亮度信号和回放彩色信号的时基校正器，用于回放亮度信号的时基校正器用于促进梳状滤波， 播放色度信号的时基校正器用于在播放期间保持亮度/色度跟踪。 通过适当的切换，可以在视频记录/回放系统的记录和回放电子设备中使用同一对时基校正器。 记录电子装置中的检测器确定何时在接收的用于记录的视频信号中存在实质的时基误差，并且在记录期间对亮度信号的梳状滤波进行调节，以便仅在空间域中执行，而不是在帧 - 帧时域。 记录电子装置包括用于通过记录信号发信号通知回放电子器件的电路，即在记录期间，仅在空间域而不是在帧到帧的时域中进行亮度信号的梳状滤波。 播放电子设备响应于这种信令以适应回放亮度信号的梳状滤波。

公开(公告)号：US5386249A

公开(公告)日：1995-01-31

申请号：US824212

申请日：1992-01-22

申请人： Christopher H. Strolle ,  Jung W. Ko

发明人： Christopher H. Strolle ,  Jung W. Ko

IPC分类号： H04N7/32 ,  H04N5/14 ,  H04N9/64 ,  H04N9/77 ,  H04N9/78 ,  H04N11/04

CPC分类号： H04N9/78 ,  H04N5/144

摘要： In each of various motion detectors operative on composite video signal comprising chrominance component signals as well as a luminance component signal, the chrominance component signals are suppressed with a filter that removes only diagonal high frequencies in the spatial-frequency domain. These diagonal high frequencies in the spatial-frequency domain include the chrominance signal components of the composite video signal if it is in accordance with an appropriate standard, such as that employed by broadcasters in the United States of America. Motion detection is improved by reason of including more of the spatial high-frequency components.

摘要翻译： 在对包括色度分量信号的复合视频信号和亮度分量信号进行操作的各种运动检测器中的每一个中，用除去空间 - 频域中的对角线高频的滤波器来抑制色度分量信号。 空间频域中的这些对角线高频包括复合视频信号的色度信号分量，如果它符合适当的标准，例如美国广播公司使用的标准。 由于包含更多的空间高频分量，运动检测得到改进。

公开(公告)号：US5218449A

公开(公告)日：1993-06-08

申请号：US861580

申请日：1992-04-01

申请人： Jung W. Ko ,  Alvin R. Balaban ,  Christopher H. Strolle

发明人： Jung W. Ko ,  Alvin R. Balaban ,  Christopher H. Strolle

IPC分类号： H04N9/83 ,  H04N5/935 ,  H04N9/79 ,  H04N9/797 ,  H04N9/82 ,  H04N9/84 ,  H04N9/896 ,  H04N9/898

CPC分类号： H04N9/797 ,  H04N9/84 ,  H04N9/896 ,  H04N5/935 ,  H04N9/7921 ,  H04N9/8205 ,  H04N9/898

摘要： A video recorder for recording composite video signals includes an analog to digital converter for digitizing samples of the composite video signal being recorded. A sync separator separates horizontal synchronizing information from the composite video signal being recorded. Filtering separates the chrominance information portion of the composite video signal being recorded, and a down-converter mixes that separated chrominance information with a nervous carrier signal thereby to generate a color-under signal. A controlled oscillator generates a succession of pixel clock signals at a rate the frequency and phase of which are determined in accordance with an oscillator control signal, the rate being more than twice the frequency of the nervous carrier signal and setting the rate of the sampling by the analog to digital converter. A counter counts the number of pixel clock signals supplied by the controlled oscillator, and a frequency divider divides the count by a prescribed factor. A discriminator determines when the resulting submultiple of the count differs in frequency or phase from the horizontal synchronization separated from the composite video signal being recorded, to develop an error signal that is low-pass filtered to generate the oscillator control signal. This completes a phase-lock loop connection including the controlled oscillator, the counter, the frequency divider, the discriminator and the low-pass filter, which loop governs sampling during the analog to digital conversion of the composite video signal being recorded. The nervous carrier signal is derived from this same phase-lock loop.

摘要翻译： 用于记录复合视频信号的视频记录器包括用于数字化所记录的复合视频信号的样本的模数转换器。 同步分离器从正在记录的复合视频信号中分离出水平同步信息。 滤波分离正在记录的复合视频信号的色度信息部分，下变频器将分离的色度信息与神经载波信号进行混合，从而产生彩色信号。 受控振荡器以其频率和相位根据振荡器控制信号确定的速率产生一系列像素时钟信号，速率大于神经载波信号频率的两倍，并将采样速率设置为 模数转换器。 计数器对由受控振荡器提供的像素时钟信号的数量进行计数，并且分频器将计数器除以规定的因子。 鉴别器确定所得到的计数的次数与频率或相位与正在记录的复合视频信号分离的水平同步的差异，以产生低通滤波以产生振荡器控制信号的误差信号。 这完成了包括受控振荡器，计数器，分频器，鉴频器和低通滤波器的锁相环路连接，该回路控制在被记录的复合视频信号的模数转换期间的采样。 神经载波信号来源于同一个锁相环。

公开(公告)号：US5416532A

公开(公告)日：1995-05-16

申请号：US032258

申请日：1993-03-17

申请人： Jung W. Ko

发明人： Jung W. Ko

IPC分类号： H04N9/77 ,  H04N9/78

CPC分类号： H04N9/78

摘要： Horizontal and vertical peaking signals are separated from a video signal by combining variously delayed responses to the video signal. A cross-fader combines the separated horizontal and vertical peaking signals in proportions determined by a cross-fader control signal. A correlator responds to ones of the variously delayed responses to the video signal for generating an output signal representative of the relative degrees of vertical and horizontal correlation in the video signal. The correlator output signal addresses a read-only memory that supplies the cross-fader control signal. The adaptively generated peaking signal is suitable for adjustably peaking a luminance component extracted from the video signal, where that video signal is a composite signal also including a chrominance component. The extraction of the luminance component is preferably done on an adaptive basis, generating horizontal and vertical comb filter responses by suitably combining the variously delayed responses to the video signal and, with a further cross-fader, combining the horizontal and vertical comb filter responses in proportions determined by the cross-fader control signal.

摘要翻译： 通过将各种延迟的响应与视频信号相结合，水平和垂直峰值信号与视频信号分离。 交叉推子结合了由交叉推子控制信号确定的比例的分离的水平和垂直峰值信号。 相关器响应于对视频信号的各种延迟的响应中的一个，以产生表示视频信号中的相对垂直和水平相关度的输出信号。 相关器输出信号寻址提供交叉推子控制信号的只读存储器。 自适应产生的峰值信号适用于从视频信号提取的亮度分量可调节地达到峰值，其中该视频信号是还包括色度分量的复合信号。 亮度分量的提取优选地在自适应的基础上进行，通过适当地组合对视频信号的不同延迟的响应来产生水平和垂直梳状滤波器响应，并且通过进一步的交叉推子将水平和垂直梳状滤波器响应合并在 比例由交叉推子控制信号决定。