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公开(公告)号：US4303952A
公开(公告)日：1981-12-01
申请号：US919298
申请日：1978-06-26
CPC分类号： G11B23/0007 , H03G9/025 , H04N5/923
摘要： A video signal recording and reproducing system in which a video signal to be recorded is passed through preemphasis means and subsequently angular modulated so that it is recorded on a record medium. During playback operation, the video signal is angular demodulated and deemphasized through a deemphasis means. Preemphasis means comprises both a non-linear preemphasis circuit and a fixed preemphasis circuit. The deemphasis means similarly comprises a fixed deemphasis circuit and a non-linear deemphasis circuit. Each of the non-linear circuits is responsive to the amplitude of an input signal thereon.
摘要翻译： 一种视频信号记录和再现系统，其中要记录的视频信号通过预加重装置并随后进行角度调制，使其被记录在记录介质上。 在播放操作期间，视频信号通过去加重方式进行角度解调和去加重。 预加重装置包括非线性预加重电路和固定预加重电路。 去加重的手段类似地包括固定的去加重电路和非线性去加重电路。 每个非线性电路响应于其上的输入信号的幅度。
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62.发明授权Helical scan video tape recorder for recording video and audio signals on contiguous tracks 失效用于在连续轨道上记录视频和音频信号的螺旋扫描录像机
公开(公告)号：US4303950A
公开(公告)日：1981-12-01
申请号：US56845
申请日：1979-07-12
IPC分类号： G11B27/024 , G11B27/029 , H04N5/928 , H04N5/78 , G11B5/49
CPC分类号： G11B27/029 , H04N5/928 , G11B2220/90 , G11B27/024
摘要： In a magnetic recording and reproducing system of the type wherein a plurality of rotating magnetic heads record the video signal on a magnetic tape as tracks which are inclined at an angle relative to the direction of travel of the magnetic tape, the audio signal is time compressed and recorded by the rotating magnetic heads on tracks contiguous with either or both ends of said video signal recording tracks, whereby even at a considerably low tape transport speed the audio signal may be recorded in a stable manner.
摘要翻译： 在这样的磁记录和再现系统中，其中多个旋转磁头将磁带上的视频信号作为相对于磁带行进方向以一定角度倾斜的磁道记录，音频信号被时间压缩 并且由旋转磁头记录在与所述视频信号记录磁道的一端或两端相邻的磁道上，由此即使在相当低的磁带传输速度下，可以以稳定的方式记录音频信号。
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63.发明授权
公开(公告)号：US4302768A
公开(公告)日：1981-11-24
申请号：US102996
申请日：1979-12-12
申请人： Takashi Kamura , Hiroshi Taniguchi
发明人： Takashi Kamura , Hiroshi Taniguchi
CPC分类号： H04N5/21 , H04N9/7912 , H04N9/83 , H04N9/882
摘要： A system for reducing or suppressing the noise components in the TV signal wherein the component representative of the difference between the as-input (or as-received) TV signal and the TV signal which has been delayed by one horizontal scanning period is derived, the difference component is subjected to the amplitude limitation, and the noise components in the TV signal reproduced by VTR or the like are removed or suppressed by a comb filter comprising said as-input TV signal and the amplitude-limited difference component.
摘要翻译： 一种用于减少或抑制TV信号中的噪声分量的系统，其中代表已经被延迟了一个水平扫描周期的输入（或被接收）TV信号和TV信号之间的差异的分量， 差分分量受到幅度限制，并且由VTR等再现的TV信号中的噪声分量通过包括所述输入TV信号和限幅差分分量的梳状滤波器去除或抑制。
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公开(公告)号：US3987488A
公开(公告)日：1976-10-19
申请号：US582825
申请日：1975-06-02
CPC分类号： G11B5/31 , G11B23/0007 , G11B5/03 , G11B5/313
摘要： A multi-tracks magnetic head has a first conductor utilized as the bias winding, and a second conductor as the winding for the signal to be recorded. Only the first conductors of the respective unit magnetic heads are connected in series.By making use of the multi-track magnetic head constructed in this way, electrical power consumption by the amplifiers supplying the recording currents to drive all the composing unit magnetic heads is minimized, and the magnetic cross-talk between the unit magnetic heads is reduced.
摘要翻译： 多磁道磁头具有用作偏置绕组的第一导体，以及用于要记录的信号的绕组的第二导体。 只有相应的单元磁头的第一个导体串联连接。
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