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公开(公告)号：US4180833A
公开(公告)日：1979-12-25
申请号：US877867
申请日：1978-02-15
申请人： Masaru Nishikawa , Toshihiko Numakura , Jun Hirai
发明人： Masaru Nishikawa , Toshihiko Numakura , Jun Hirai
CPC分类号： H04N5/783 , G11B23/0007 , G11B5/4893 , G11B5/534 , H04N5/78263
摘要： In an apparatus for reproducing video signals which are recorded as modulations of a carrier on a record medium, such as a magnetic tape, in successive, abutting parallel record tracks, with the signals being recorded in alternating tracks with different first and second azimuth angles, first and second magnetic heads are provided for sequentially scanning the tracks in which signals are recorded with the first and second azimuth angles, respectively, and the first and second magnetic heads having azimuth angles corresponding to the first and second azimuth angles of the respective tracks to be scanned thereby. Each of the magnetic heads is dimensioned and guided in the direction transverse to the direction along the respective track being scanned so as to overlap an adjacent track by a distance .DELTA.W=n.lambda./tan .theta.(n=1,2, . . .), in which .lambda. is the wavelength of the carrier as modulated by synchronizing signal portions of the video signals recorded in such adjacent track, and .theta. is the difference between the first and second azimuth angles of the heads. In this manner, cross-talk from the adjacent track is substantially attenuated.
摘要翻译： 在用于再现被记录为诸如磁带的记录介质上的载体的调制的视频信号的装置中，在连续的邻接并行记录轨道中，信号被记录在具有不同的第一和第二方位角的交替轨迹中， 提供第一和第二磁头以分别以第一和第二方位角顺序地扫描记录有信号的轨道，并且第一和第二磁头具有对应于各个轨道的第一和第二方位角的方位角到 被扫描。 每个磁头的尺寸和横向于沿着被扫描的相应轨道的方向被引导，以便使相邻轨道重叠距离DELTA W =nλ/tanθ（n = 1,2，...）。 ），其中λ是通过使记录在这种相邻轨道中的视频信号的信号部分同步来调制的载波的波长，θ是磁头的第一和第二方位角之间的差。 以这种方式，来自相邻轨道的串扰实质上是衰减的。
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2.发明授权
公开(公告)号：US4175272A
公开(公告)日：1979-11-20
申请号：US937095
申请日：1978-08-28
申请人： Toshihiko Numakura , Jun Hirai
发明人： Toshihiko Numakura , Jun Hirai
CPC分类号： H04N5/911
摘要： Video signal processing circuitry for compensating a video signal having different average levels in alternate horizontal line intervals, such as in odd and even line intervals during a field or frame interval. A first average detector is operable during alternate ones of the line intervals, for example, during odd line intervals, for detecting the average level of the video signal in such alternate line intervals. A second average detector is operable during the remaining ones of the line intervals, for example, during the even line intervals, for detecting the average level of the video signal in such remaining line intervals. A compensating circuit is responsive to the difference between the detected average levels of the video signal in the alternate and remaining line intervals, respectively, for producing compensating signals. These compensating signals are combined with the video signal so as to minimize the difference between the average level of the video signal in successive line intervals.
摘要翻译： 视频信号处理电路，用于补偿在交替的水平行间隔中具有不同平均电平的视频信号，例如在场或帧间隔期间的奇数和偶数行间隔。 第一平均检测器可在替代的行间隔期间操作，例如在奇数行间隔期间，用于检测这种交替行间隔中的视频信号的平均电平。 第二平均检测器可在剩余的行间隔期间操作，例如在偶数行间隔期间，用于检测这些剩余行间隔中的视频信号的平均电平。 补偿电路分别响应于检测到的交替和剩余行间隔中的视频信号的平均电平之差，以产生补偿信号。 这些补偿信号与视频信号组合，以便使连续行间隔中的视频信号的平均电平之间的差最小化。
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3.发明授权Anti-piracy video tape system has anti-piracy components added to the luminance signal and the color difference signals 失效防伪视频胶带系统具有添加到发光信号和颜色差异信号的防伪组件
公开(公告)号：US5243411A
公开(公告)日：1993-09-07
申请号：US892039
申请日：1992-06-02
申请人： Yoshiki Shirochi , Toshihiko Numakura , Isao Saito
发明人： Yoshiki Shirochi , Toshihiko Numakura , Isao Saito
CPC分类号： H04N7/1696
摘要： An anti-piracy signal generating circuit for generating anti-piracy signal components on a video signal reproduced by a first video unit, the signal components being interleaved to a frequency f.sub.H in the band of the video signal in accordance with the video signal components and a signal superimposing circuit for superimposing the anti-piracy signal components intermittenly on the luminance signal, first color difference signal, and second color difference signal.
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4.发明授权Recording and reproducing apparatus for time compressed video signals wherein said signals are expanded and converted into two separate channels before recording 失效用于时间压缩视频信号的记录和再现装置，其中所述信号在记录之前被扩展并转换成两个单独的通道
公开(公告)号：US4780769A
公开(公告)日：1988-10-25
申请号：US826026
申请日：1986-02-04
CPC分类号： H04N5/919 , H04N9/7973
摘要： A recording and reproducing apparatus wherein the video signal is time base expanded and separated into two channels before being recorded with a two headed recorder on two separate channels of a magnetic medium and wherein during reproduction the two channels from the magnetic medium are supplied to a time base corrector which supplies an output to a channel mixing and time base compressor which converts the two channels into a single output signal. A burst generator inserts burst signals into the two channels before they are recorded.
摘要翻译： 一种记录和再现装置，其中视频信号被时基扩展并分离成两个通道，然后在磁介质的两个独立通道上用两头记录器进行记录，并且其中在再现期间将来自磁介质的两个通道提供到一个时间 基本校正器，其将输出提供给将两个通道转换为单个输出信号的通道混合和时基压缩器。 突发发生器在记录之前将突发信号插入两个通道。
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5.发明授权
公开(公告)号：US4851928A
公开(公告)日：1989-07-25
申请号：US167362
申请日：1988-03-14
CPC分类号： H04N9/83
摘要： A magnetic recording and/or reproducing apparatus and methods thereof for a composite color TV (television) signal arranged such that a luminance signal and a high band component of a chrominance subcarrier signal of the composite color TV signal are frequency modulated, recorded and reproduced, while a low band component of the chrominance subcarrier signal is frequency down converted to a frequency at a band lower than that of the frequency modulated signal, thus improving resolution of the color signal component.
摘要翻译： 一种用于复合彩色电视（电视）信号的磁记录和/或再现装置及其方法，其布置成使得复合彩色TV信号的色度副载波信号的亮度信号和高频带分量被频率调制，记录和再现， 而色度副载波信号的低频分量被降频转换成低于调频信号的频带，从而提高了彩色信号分量的分辨率。
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公开(公告)号：US4220964A
公开(公告)日：1980-09-02
申请号：US960839
申请日：1978-11-15
申请人： Kazuo Yamagiwa , Toshihiko Numakura
发明人： Kazuo Yamagiwa , Toshihiko Numakura
摘要： Apparatus for recording and/or reproducing a SECAM composite color television signal in parallel tracks on a record medium. The luminance and chrominance components of the SECAM television signal are separated from each other, and then the luminance component is modulated to a higher frequency range while the chrominance component is frequency-converted to a lower frequency range. These frequency-modified components are recombined and recorded. In frequency-converting the chrominance component, first and second frequency-converting carrier signals are generated, and the phases of these frequency-converting signals are synchronized, or locked, to the incoming SECAM television signal so as to exhibit corresponding phase changes. When these frequency-converting signals are used to frequency-convert the chrominance component of the SECAM television signal, the resultant frequency-converted chrominance components are recorded in at least one track with a substantially constant phase and in the next adjacent track with a frequency-converted sub-carrier which differs from that of the said one track. The recorded frequency-converted sub-carrier frequencies in adjacent tracks are in frequency interleaved relation with respect to each other. In one embodiment of the recording apparatus, the frequencies of the frequency-converting signals differ from each other by n/4fh, wherein n is an integer (preferably 1) and fh is the horizontal line frequency of the SECAM television signal. In this embodiment, the phase of the recorded chrominance subcarrier is constant for all tracks.
摘要翻译： 用于在记录介质上的并行轨道中记录和/或再现SECAM复合彩色电视信号的装置。 SECAM电视信号的亮度和色度分量彼此分离，然后将亮度分量调制到更高的频率范围，同时色度分量被频率转换为较低的频率范围。 这些频率修正的组件被重组和记录。 在对色度分量进行频率转换时，产生第一和第二频率转换载波信号，并将这些频率转换信号的相位同步或锁定到输入的SECAM电视信号，以便表现相应的相位变化。 当使用这些频率转换信号对SECAM电视信号的色度分量进行频率转换时，所得到的经频率转换的色度分量被记录在具有基本上恒定相位的至少一个轨道中，并且在下一个相邻轨道中被记录， 转换的子载波与所述一个轨道的不同。 相邻轨道中经记录的频率转换的子载波频率彼此之间具有频率交替关系。 在记录装置的一个实施例中，频率转换信号的频率彼此不同，为n / 4fh，其中n为整数（优选为1），fh为SECAM电视信号的水平线频率。 在本实施例中，记录的色度副载波的相位对于所有轨道是恒定的。
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7.发明授权
公开(公告)号：US4268874A
公开(公告)日：1981-05-19
申请号：US16924
申请日：1979-03-02
CPC分类号： G11B15/1841 , G11B21/10 , G11B5/588
摘要： An apparatus for reproducing a video signal recorded in skewed parallel tracks on a magnetic tape compensates both for cross-track and along-track errors during reproduction at a tape speed different from the tape speed employed during recording by affixing reproducing heads to bi-morph leaves which are skewed with respect to the direction of rotation of a rotating drum to which they are attached. The skew has components in the along-track direction and the across-track direction such that unidirectional motions of the bi-morph leaves simultaneously correct for cross-track and along-track errors.
摘要翻译： 一种用于再现记录在磁带上的偏斜平行轨道中的视频信号的装置在再现期间以不同于在记录期间所使用的磁带速度的磁带速度将重放磁头固定到双变形叶片上的交叉轨道和沿轨道误差补偿两者 它们相对于它们所连接的旋转滚筒的旋转方向倾斜。 偏斜具有在沿轨道方向和跨轨道方向上的分量，使得双变形的单向运动离开同时对于跨轨道和沿轨道误差的正确。
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8.发明授权Method and apparatus for recording and reproducing a color-aligned line-sequential color video signal 失效用于记录和再现彩色对准的行顺序彩色视频信号的方法和装置
公开(公告)号：US4233621A
公开(公告)日：1980-11-11
申请号：US960838
申请日：1978-11-15
申请人： Kazuo Yamagiwa , Toshihiko Numakura
发明人： Kazuo Yamagiwa , Toshihiko Numakura
CPC分类号： H04N9/86
摘要： A method and apparatus for recording in successive parallel tracks on a record medium a periodic information signal, such as a video signal having information contained in successive line intervals, a predetermined number of line intervals being included in a field interval and a predetermined number of field intervals being included in a frame interval. Alternate ones of the frame intervals are delayed by a time delay equal to an odd multiple (2n-1) of a line interval. The delayed and undelayed frame intervals are supplied, in sequence, to a recording transducer for recording in successive parallel tracks on the record medium. If the video signal is a SECAM color video signal, then the effect of delaying alternate frame intervals, such as the odd (or even) frame intervals is to align line intervals in adjacent tracks with information representing the same color.Also disclosed are a method and apparatus for reproducing the periodic information signal which had been recorded in the aforementioned manner. These recorded signals are reproduced from the successive parallel tracks to recover the delayed and undelayed frame intervals alternately. The undelayed frame intervals are delayed, during reproduction, by a time delay equal to the aforesaid odd multiple (2n-1) of a line interval, thereby recovering the periodic information signal which appears in successive frame intervals as being undelayed relative to each other. Thus, if, during recording, the odd frame intervals are delayed, then during reproduction, the even frame intervals are delayed so as to equalize the reproduced odd and even frames.
摘要翻译： 一种用于在记录介质上的连续并行轨道中记录周期性信息信号的方法和装置，例如具有包含在连续行间隔中的信息的视频信号，包括在场间隔中的预定数量的行间隔和预定数量的场 间隔被包括在帧间隔中。 帧间隔中的交替的帧间隔被延迟等于行间隔的奇数倍（2n-1）的时间延迟。 延迟和未延迟的帧间隔依次提供给用于在记录介质上的连续平行轨道中记录的记录换能器。 如果视频信号是SECAM彩色视频信号，则延迟诸如奇数（或偶数）帧间隔的交替帧间隔的效果是使相邻轨道中的行间隔与表示相同颜色的信息对齐。 还公开了一种用于再现以上述方式记录的周期性信息信号的方法和装置。 这些记录的信号从连续的并行轨道再现，以交替地恢复延迟的和未延迟的帧间隔。 未延迟的帧间隔在再现期间被延迟等于行间隔的上述奇数倍（2n-1）的时间延迟，从而恢复出现在相继帧间隔中的相对于彼此不延迟的周期性信息信号。 因此，如果在记录期间奇数帧间隔被延迟，则在再现期间，偶数帧间隔被延迟以便均衡再现的奇数和偶数帧。
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公开(公告)号：US4208673A
公开(公告)日：1980-06-17
申请号：US815012
申请日：1977-07-12
申请人： Toshihiko Numakura
发明人： Toshihiko Numakura
摘要： A method of and apparatus for recording a video signal in successive parallel tracks on a record medium, and for reproducing the recorded signal. The video signal, which may be the luminance component of a composite color television signal, frequency modulates a carrier to produce a frequency modulated video signal. The phase of the frequency modulated video signal is selectively shifted in selected line intervals and is recorded in parallel tracks such that the phase difference between frequency modulated video signals in at least some adjacently recorded line intervals of successive tracks is an odd multiple of .pi.. In one embodiment, the difference between the phase of alternate line intervals which are recorded in one track and the phase of alternate line intervals which are recorded in the next adjacent track is equal to an odd multiple of .pi.. In accordance with another embodiment, the difference between the phases of successive line intervals which are recorded in the same track is equal to an odd multiple of .pi.. During reproducing, the successive tracks are scanned and the frequency modulated signals recorded therein are reproduced together with a crosstalk component which is picked up by the transducer from an adjacent track, the crosstalk components being out of phase with each other. The reproduced frequency modulated signal is demodulated so as to recover the original video signal and an additional component, the latter being due to the phase shifting of the frequency modulated signal. The additional component then is eliminated from the recorded video signal.
摘要翻译： 一种用于在记录介质上的连续并行轨道中记录视频信号并用于再现记录信号的方法和装置。 可以是复合彩色电视信号的亮度分量的视频信号对载波进行频率调制，以产生调频视频信号。 频率调制视频信号的相位在选定的行间隔中有选择地移位，并记录在并行轨道中，使得连续轨道的至少一些相邻记录的行间隔中的调频视频信号之间的相位差为pi的奇数倍。 在一个实施例中，记录在一个轨道中的交替行间隔的相位与记录在下一相邻轨道中的交替行间隔的相位之间的差等于pi的奇数倍。 根据另一个实施例，记录在同一轨道中的连续行间隔的相位之间的差等于pi的奇数倍。 在再现期间，扫描连续的轨迹，并且记录在其中的调频信号与由相邻轨道的换能器拾取的串扰分量一起再现，串扰分量彼此不同相。 再现的频率调制信号被解调，以恢复原始视频信号和附加分量，后者是由于调频信号的相移引起的。 然后从记录的视频信号中消除附加分量。
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10.发明授权Video recorder having means for maintaining constant the amplitude of the frequency-modulated signal 失效视频记录器具有用于保持频率调制信号的幅度恒定的装置
公开(公告)号：US4193084A
公开(公告)日：1980-03-11
申请号：US841793
申请日：1977-10-13
申请人： Kazuo Yamagiwa , Kaneo Saito , Toshihiko Numakura
发明人： Kazuo Yamagiwa , Kaneo Saito , Toshihiko Numakura
摘要： In apparatus for recording, or otherwise transmitting, video or other information signals, and in which at least a portion of the signal to be recorded, for example, the luminance component of a color video signal, is frequency modulated and then passed through a filter for limiting the frequency band of the resulting frequency modulated component or signal which is recorded; a signal processor, such as, an automatic gain control or limiter, acts on the frequency modulated output of the filter to eliminate or compensate for amplitude variations that may occur therein by reason of the filter, for example, at portions of the signal where substantial pre-emphasis was applied.
摘要翻译： 在用于记录或以其他方式发送视频或其他信息信号的装置中，其中要记录的信号的至少一部分（例如，彩色视频信号的亮度分量）被频率调制，然后通过滤波器 用于限制所记录的结果频率调制分量或信号的频带; 诸如自动增益控制或限制器的信号处理器作用于滤波器的调频输出，以消除或补偿由于滤波器而可能在其中发生的幅度变化，例如在信号的部分处 预先强调了应用。
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