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公开(公告)号：EP0696143B1
公开(公告)日：2002-01-09
申请号：EP95116330.2
申请日：1991-08-09
发明人： Strolle, Christopher H. , Patel, Chandrakant B. , Wedam, Werner F. , Ko, Jung-Wan , Schnitzler, Raymond , Yun, Jong-Kyung
IPC分类号： H04N9/79
CPC分类号： H04N9/835 , H04N9/7976 , H04N9/80 , H04N9/8205 , H04N9/831 , H04N9/898
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2.发明公开Digital modulators for use with subnyquist sampling of raster-scanned samples of image intensity 失效使用数字调制器与子扫描扫描图像强度样本进行子采样
公开(公告)号：EP0551561A3
公开(公告)日：1993-11-10
申请号：EP92112456.6
申请日：1992-07-21
CPC分类号： H04N9/7976 , H04N9/797 , H04N9/80 , H04N9/8205 , H04N9/831 , H04N9/835 , H04N9/84 , H04N9/898
摘要： An apparatus for the tape recording of a video signal, which is a signal of a bandwidth extending up to a prescribed maximum frequency, processes this signal to generate a folded-spectrum signal. The video signal is digitized and supplied to a digital band-splitting filter (90,91,92) with a cross-over frequency at one-half said prescribed maximum frequency, for separating the digitized video signal into samples of a lower-frequency-band component and into samples of a higher-frequency-band component. A balanced modulator (98,99,100) is connected for modulating a folding carrier wave of the prescribed maximum frequency. The modulation is done in accordance with the higher-frequency-band component to generate a balanced modulation signal, which is linearly combined with the lower-frequency-band component to generate the folded-spectrum video signal. Preferably, the sampling rate of the digitized video signal is exactly the Nyquist rate of the prescribed maximum frequency, thereby reducing the balanced modulation of a suitably phased folding carrier wave to multiplication of successive samples of the modulating signal alternately by plus one and by minus one.
摘要翻译： 用于磁带记录视频信号的电子装置的装置，其是延伸到规定的最大频率的规定带宽的基带信号，处理视频信号以产生折叠频谱视频信号。 视频信号被数字化并提供给数字带分离滤波器，该数字频带分离滤波器的交叉频率为规定的最大频率的一半，用于将数字化的视频信号分离成低频带分量的采样， 较高频带分量。 连接平衡调制器用于调制规定的最大频率的折叠载波，根据较高频带分量进行调制以产生平衡调制信号; 并且平衡调制信号几乎与较低频带分量组合以产生折叠频谱视频信号。 优选地，数字化视频信号的采样率恰好是规定的最大频率的奈奎斯特速率，将适当地相位的折叠载波的平衡调制减少到相乘的调制信号的连续采样乘以加1和减1。 无需使用数字乘法器即可进行这种乘法运算。
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3.发明公开Color-under chroma channel encoded with auxiliary signals 失效Color-Under-Chrominanzkanal mitzusätzlichenSignalen。
公开(公告)号：EP0543038A1
公开(公告)日：1993-05-26
申请号：EP91119775.4
申请日：1991-11-19
CPC分类号： H04N7/081 , H04N9/8205 , H04N9/84
摘要： Apparatus and a method is disclosed for encoding, transmitting and decoding of one or two auxiliary or control signals on a phase alternating carrier. The phase alternating carrier is generated such that, in a given frame, it is in-phase on one scan line, and out-of-phase on the next scan line relative to the conventional chroma carrier. The (I and Q) chroma information is modulated on the chroma carrier in a conventional form to generate a chroma signal. The phase alternating carrier is modulated with one or two auxiliary signals in a similar fashion. The encoded phase alternating carrier is then added to the modulated chroma carrier (chroma signal), and processed in the chroma channel for recording on a magnetic tape. A decoder or playback apparatus processes the chroma channel to decode the two modulated carriers. The modulated chroma carrier (chroma signal) is decoded in a conventional demodulator to recover the chroma (I and Q) information. The encoded phase alternating carrier is decoded to recover the original auxiliary signals. The auxiliary signals may be digital audio signals or motion signals indicative of motion in the scenes.
摘要翻译： 公开了用于在相位交替载波上编码，发送和解码一个或两个辅助或控制信号的装置和方法。 产生相位交变载波，使得在给定帧中，它在一条扫描线上同相，而在相对于传统色度载波的下一扫描线上是异相的。 （I和Q）色度信息以常规形式在色度载体上调制以产生色度信号。 以相似的方式用一个或两个辅助信号调制相位交变载波。 然后将经编码的相位交替载波加到调制的色度载波（色度信号）上，并在色度通道中进行处理以在磁带上进行记录。 解码器或重放装置处理色度通道以对两个调制载波进行解码。 调制色度载波（色度信号）在常规解调器中进行解码，以恢复色度（I和Q）信息。 编码相位交替载波被解码以恢复原始辅助信号。 辅助信号可以是表示场景中的运动的数字音频信号或运动信号。
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4.发明公开De-emphasis and re-emphasis of high frequencies in a video signal 失效Vor- und Nachverzerrung derHöhen-Frequenzen eines Videosignals。
公开(公告)号：EP0482945A2
公开(公告)日：1992-04-29
申请号：EP91309887.7
申请日：1991-10-25
CPC分类号： H04N9/7976 , H04N5/923 , H04N9/8205
摘要： A system is disclosed for recording and reproducing a luminance signal (Y) on and from a medium (40). The system includes an adaptive deemphasis circuit (10) for adaptively reducing the level of a high frequency portion of the luminance signal (Y). A record circuit records the reduced level luminance signal on the medium (40). A playback circuit reproduces the reduced level luminance signal from the medium (40). A reemphasis circuit (70) non-adaptively boosts the level of the high frequency portion of the reduced level luminance signal to produce the luminance signal (Y). To this end, a circuit (73) cores a high frequency portion of the reduced level luminance signal, and the level of the cored high frequency portion is then boosted by a predetermined amount to produce the luminance signal (Y).
摘要翻译： 公开了一种用于在介质（40）上记录和再现亮度信号（Y）的系统。 该系统包括用于自适应地降低亮度信号（Y）的高频部分的电平的自适应去加重电路（10）。 记录电路在介质（40）上记录降低的亮度信号。 回放电路从介质（40）再现降低的亮度信号。 再加重电路（70）不自适应地升高降低亮度信号的高频部分的电平以产生亮度信号（Y）。 为此，电路（73）对低电平亮度信号的高频部分进行核心，然后将核心高频部分的电平升高预定量，以产生亮度信号（Y）。
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公开(公告)号：EP0559982B1
公开(公告)日：1999-05-26
申请号：EP92308888.4
申请日：1992-09-30
CPC分类号： H04N5/9264 , H04N5/783 , H04N19/124 , H04N19/14 , H04N19/146 , H04N19/147 , H04N19/15 , H04N19/154 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/196 , H04N19/60 , H04N19/94
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6.发明公开Time-base correction in a video recording/playback system 失效Zeitbasiskorrektur在einer Videoaufzeichnungs / Wiedergabevorrichtung。
公开(公告)号：EP0557641A2
公开(公告)日：1993-09-01
申请号：EP92309137.5
申请日：1992-10-07
IPC分类号： H04N9/89
CPC分类号： H04N9/797 , H04N5/935 , H04N9/7904 , H04N9/7921 , H04N9/8205 , H04N9/83 , H04N9/84 , H04N9/896 , H04N9/898
摘要： A video recording/playback system includes in its recording electronics time-base correctors (TBC1, TBC2) both for luma signal and for color-under signal, the time-base corrector (TBC1) for luma signal being used to facilitate comb filtering and the time-base corrector (TBC2) 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 (TBC3, TBC4) both for played-back luma signal and for played-back color-under signal, the time-base corrector (TBC3) for played-back luma signal being used to facilitate comb filtering and the time-base corrector (TBC4) for played-back chroma signal being used to maintain luma/chroma tracking during playback. With appropriate switching, the same pair of time-base correctors (TBC1,2 or TBC3,4) can be used in both the recording and the playback electronics of the 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. Furthermore, time-base correctors are disclosed, which respond to sync signals.
One embodiment contains PLLs generating a chrominance carrier, as well. Another embodiment contains PLLs generating a chromatic carrier, as well. Another embodiment has different clocks for low frequency and high frequency time-base errors.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（TBC1，TBC2），用于亮度信号的时基校正器（TBC1）用于促进梳状滤波，并且 用于色度信号的时基校正器（TBC2）用于在记录期间维持亮度/色度跟踪。 视频记录/回放系统包括用于播放亮度信号和回放彩色信号的重放电子设备时基校正器（TBC3，TBC4），用于播放亮度的时基校正器（TBC3） 用于促进梳状滤波的信号和用于播放色度信号的时基校正器（TBC4）用于在回放期间保持亮度/色度跟踪。 通过适当的切换，同一对时基校正器（TBC1,2或TBC3,4）可以在视频录制/播放系统的录制和回放电子设备中使用。 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，以在空间域中而不是在帧 - 帧时域。 记录电子器件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。
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公开(公告)号：EP0499715A2
公开(公告)日：1992-08-26
申请号：EP91122016.8
申请日：1991-12-20
CPC分类号： H04N9/79 , H04N5/9261 , H04N7/125
摘要： A method and apparatus uses a spatial filter for a television recording and playback system using a spectral folding process, wherein the signal is modulated onto a folding carrier of (f h /2, f v /2), for separating the two-dimensional image spectral domain of the television signal into first and second regions that are either passed or attenuated, the partition between the regions being selected such that every point in the passed region has a mirror point mirrored about (f h /4, f v /4) in the attenuated region; and reconstructing the passed region after playback.
摘要翻译： 一种方法和装置使用用于使用频谱折叠处理的电视记录和重放系统的空间滤波器，其中该信号被调制到（fh / 2，fv / 2）的折叠载体上，用于分离二维图像频谱域 将电视信号转换成通过或衰减的第一和第二区域，选择区域之间的分区，使得通过区域中的每个点在衰减区域中具有镜像关于（fh / 4，fv / 4）的镜像点 ; 并在重放后重建通过的区域。
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8.发明公开Adaptive deemphasis and reemphasis of high frequencies in a video signal utilizing a recorded control signal 失效自适应前和去加重使用一个记录的控制信号的视频信号的高频率。
公开(公告)号：EP0482666A2
公开(公告)日：1992-04-29
申请号：EP91118256.6
申请日：1991-10-25
CPC分类号： H04N9/7976 , H04N5/923 , H04N9/8205 , H04N9/835 , H04N9/85
摘要： A video signal recording system is disclosed which includes a circuit (80) for generating a control signal representative of the level of the high frequency portion of a full bandwidth luminance signal. An adaptive deemphasis circuit (10) reduces the level of the high frequency portion of the luminance signal in response to the control signal. A folding circuit (20) folds the high frequency portion of the deemphasized luminance signal into the low frequency portion. The folded deemphasized luminance is combined with the control signal and recorded on the video tape. A video signal playback system is disclosed which includes a circuit (50) for separating the previously recorded control signal from the previously recorded folded deemphasized luminance signal. An unfolding circuit (60) unfolds the played back luminance signal to produce a wide bandwidth deemphasized luminance signal. An adaptive reemphasis circuit (70) boosts the level of the high frequency portion of the unfolded luminance signal in response to the separated control signal.
摘要翻译： 的视频信号记录系统是游离缺失盘，其包括用于生成控制代表全带宽亮度信号的高频部分的电平的信号的电路。 自适应去加重电路降低了亮度信号的高频部分的响应于所述控制信号的电平。 一种折叠电路折叠到低频部分中的去加重亮度信号的高频部分。 折叠的去加重亮度与控制信号组合，并记录在录像带。 一种视频信号重放系统是游离缺失盘，其包括用于从先前记录的折叠的去加重亮度信号中分离先前记录控制信号的电路。 一个展开电路展开唇同步的亮度信号，以产生宽的带宽去加重亮度信号。 自适应再加重电路的升压展开的亮度信号的高频部分的响应于分离出的控制信号的电平。
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公开(公告)号：EP0471517B1
公开(公告)日：1996-11-20
申请号：EP91307342.5
申请日：1991-08-09
发明人： Strolle, Christopher H. , Patel, Chandrakant B. , Wedam, Werner F. , Ko, Jung-Wan , Schnitzler, Raymond , Yun, Jong-Kyung
IPC分类号： H04N9/79
CPC分类号： H04N9/835 , H04N9/7976 , H04N9/80 , H04N9/8205 , H04N9/831 , H04N9/898
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公开(公告)号：EP0698997A3
公开(公告)日：1996-03-13
申请号：EP95116314.6
申请日：1991-10-25
IPC分类号： H04N5/92
CPC分类号： H04N9/7976 , H04N5/923 , H04N9/8205
摘要： A system is disclosed for recording and reproducing a luminance signal (Y) on and from a medium (40). The system includes an adaptive deemphasis circuit (10) for adaptively reducing the level of a high frequency portion of the luminance signal (Y). A record circuit records the reduced level luminance signal on the medium (40). A playback circuit reproduces the reduced level luminance signal from the medium (40). A reemphasis circuit (70) non-adaptively boosts the level of the high frequency portion of the reduced level luminance signal to produce the luminance signal (Y). To this end, a circuit (73) cores a high frequency portion of the reduced level luminance signal, and the level of the cored high frequency portion is then boosted by a predetermined amount to produce the luminance signal (Y).
摘要翻译： 公开了一种用于在介质（40）上记录和再现亮度信号（Y）的系统。 该系统包括自适应去加重电路（10），用于自适应地降低亮度信号（Y）的高频部分的电平。 记录电路将降低的亮度信号记录在介质（40）上。 回放电路再现来自介质（40）的降低亮度的亮度信号。 再加重电路（70）非自适应地升高降低亮度信号的高频部分的电平以产生亮度信号（Y）。 为此，电路（73）对降低亮度信号的高频部分进行核心化，然后将核心高频部分的电平升高预定量以产生亮度信号（Y）。
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