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公开(公告)号：US4393416A
公开(公告)日：1983-07-12
申请号：US281043
申请日：1981-07-07
摘要： A tracking system of the present invention comprises positionable elements, rotary video heads mounted on the positionable elements, a control head, a frequency generator attached to a capstan motor, and a displacing pattern generator. The displacing pattern generator includes counters which count the pulses from the frequency generator and are reset by control signals reproduced by the control head, a still pattern generator, and an adding means which adds the output signal from the counter and the output signal from the still pattern generator. The output signal of the displacing pattern generator is amplified and applied to the positionable elements. As result, the video heads mounted on the positionable elements can properly trace on a recorded video track at both a normal tape speed or at another tape speed.
摘要翻译： 本发明的跟踪系统包括可定位元件，安装在可定位元件上的旋转视频头，控制头，连接到主导轴马达的频率发生器和位移图案发生器。 位移图案生成器包括计数器，其对来自频率发生器的脉冲进行计数，并由控制头再现的控制信号，静止图案发生器和加法装置将来自计数器的输出信号和来自静止图像的输出信号相加 图案发生器。 位移图案发生器的输出信号被放大并施加到可定位元件。 结果，安装在可定位元件上的视频头可以以正常的磁带速度或以另一磁带速度适当地跟踪记录的视频轨道。
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公开(公告)号：US4393417A
公开(公告)日：1983-07-12
申请号：US205599
申请日：1980-11-10
CPC分类号： G11B5/588 , G11B15/1808
摘要： A tracking system including positionable elements, rotary video heads mounted on the positionable elements, a control head, a frequency generator attached to a capstan motor, and a displacing pattern generator. The displacing pattern generator includes counters which count the pulses from the frequency generator. The pattern generator is reset by control signals reproduced by the control head, a still pattern generator, and an adding means which adds the output signal from the counters and the output signal from the still pattern generator. The output signal of the displacing pattern generator is amplified and applied to the positionable element. As result, the video head mounted on the positionable element can properly trace on a recorded video track at a normal tape speed or at a different tape speed.
摘要翻译： 包括可定位元件的跟踪系统，安装在可定位元件上的旋转视频头，控制头，连接到主导轴马达的频率发生器和位移图案发生器。 位移模式发生器包括计数来自频率发生器的脉冲的计数器。 模式发生器由控制头再现的控制信号，静止图形发生器，以及将来自计数器的输出信号和来自静止图案发生器的输出信号相加的加法装置复位。 置换图案发生器的输出信号被放大并施加到可定位元件。 结果，安装在可定位元件上的视频头可以以正常的磁带速度或以不同的磁带速度适当地跟踪记录的视频轨道。
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公开(公告)号：US4242699A
公开(公告)日：1980-12-30
申请号：US842334
申请日：1977-10-14
申请人： Masaaki Kobayashi , Kiyoji Fujisawa
发明人： Masaaki Kobayashi , Kiyoji Fujisawa
CPC分类号： H04N9/83
摘要： A recording and reproducing apparatus for color video signals, in which before the color video signal is recorded, the chroma signal of the color video signal is frequency-converted by a carrier from an oscillator whose frequency is f.sub.a =[(455/2)+{(2n+1)/4}]f.sub.H so that the chroma signal is compressed to a very low frequency band with the sidebands of the chroma signal being interleaved with each other. The thus compressed signal is frequency-modulated and recorded, and is then reproduced and demodulated. The demodulated signal is balance-modulated and passed through a comb-filter to reproduce the chroma signal. Since the chroma signal is frequency-modulated before the recording, possible fluctuation of the signal level due to the recording and reproducing means does not affect the resulting reproduced chroma signal. Also, since the chroma signal is compressed to a very low frequency band, a time base error (jitters) which might possibly occur in the resulting reproduced chroma signal due e.g. to a fluctuation of the mechanical operation, such as magnetic tape movement, of the recording and reproducing means can be minimized.
摘要翻译： 用于彩色视频信号的记录和再现装置，其中在彩色视频信号被记录之前，彩色视频信号的色度信号由载波从频率为fa = [（455/2）+ {（2n + 1）/ 4}] fH，使得色度信号被压缩到非常低的频带，色度信号的边带彼此交错。 这样压缩的信号被频率调制和记录，然后被再现和解调。 解调信号被平衡调制，并通过梳状滤波器再现色度信号。 由于在记录之前对色度信号进行了频率调制，所以由于记录和再现装置引起的信号电平的可能的波动不会影响所产生的再现色度信号。 此外，由于色度信号被压缩到非常低的频带，所以可能在所产生的再现的色度信号中可能发生的时基误差（抖动）。 可以使记录和再现装置的机械操作（例如磁带移动）的波动最小化。
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公开(公告)号：US4344087A
公开(公告)日：1982-08-10
申请号：US98199
申请日：1979-11-27
申请人： Masao Tomita , Takenobu Isaka , Kiyoji Fujisawa , Mineo Mino
发明人： Masao Tomita , Takenobu Isaka , Kiyoji Fujisawa , Mineo Mino
CPC分类号： H04N5/932
摘要： A method of processing video signals for eliminating vertical picture fluctuations caused when a video tape recorder reproduces video signals at a tape speed different from that used for recording the video signals. The vertical picture fluctuations are eliminated by substituting distorted vertical synchronous signals for the original vertical synchronous signal, the distorted vertical synchronous signals generated by a processing apparatus having a correction circuit which corrects for the difference in frequency characteristics between the video signal path and the vertical synchronous signal path.
摘要翻译： 一种处理视频信号的方法，用于消除当磁带录像机以不同于用于记录视频信号的磁带速度再现视频信号时引起的垂直图像波动。 通过将失真的垂直同步信号代入原始垂直同步信号，由具有修正视频信号路径和垂直同步信号之间的频率特性差异的校正电路的处理装置产生的失真垂直同步信号来消除垂直图像波动 信号路径。
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公开(公告)号：US4327384A
公开(公告)日：1982-04-27
申请号：US116464
申请日：1980-01-29
申请人： Masao Tomita , Takenobu Isaka , Mineo Mino , Kiyoji Fujisawa
发明人： Masao Tomita , Takenobu Isaka , Mineo Mino , Kiyoji Fujisawa
CPC分类号： G11B5/588
摘要： A rotary head type magnetic tape recording/reproducing apparatus, by which a tracking condition of the reproducing heads and a recorded track can be automatically adjusted. This apparatus includes an oscillator for imparting small vibrations to the reproducing heads, a synchronous detector, an integration adder circuit including an adder and a delay circuit rotary heads mounted on a positionable element, and from the small vibrations. A tracking error signal which is derived by wobbling circuit is applied to the integration adder circuit, and the positionable element is controlled by the output signal of the integration adder means so as to construct a servo loop. Accordingly, proper tracking can be attained even for large tracking error.
摘要翻译： 一种旋转磁头式磁带记录/再现装置，通过该旋转磁头型磁带记录/再现装置可以自动调整再现磁头的跟踪状态和记录磁迹。 该装置包括用于向再现头施加小振动的振荡器，同步检波器，积分加法器电路，其包括加法器和安装在可定位元件上的延迟电路旋转头以及小振动。 通过摆动电路导出的跟踪误差信号被施加到积分加法器电路，并且可定位元件由积分加法器装置的输出信号控制，以构成伺服回路。 因此，即使对于大的跟踪误差也可以获得适当的跟踪。
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