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41. 发明授权

US3931638A Apparatus for modifying the time base of signals 失效
标题翻译：用于修改信号时基的装置
公开(公告)号：US3931638A
公开(公告)日：1976-01-06
申请号：US432363
申请日：1974-01-10
申请人： Robert A. Lentz , James U. Lemke
发明人： Robert A. Lentz , James U. Lemke
IPC分类号： G11B20/02 , H04N5/953 , H04N5/79
CPC分类号： H04N5/953
摘要： Time base instability of signals in a train thereof is corrected by use of analog shift registers. As employed in the correction of time base instability of video signals, paired analog shift registers are used. While one register has samples of one video line signal clocked into it at a rate corresponding to its time base instability, the other register clocks out, at a uniform rate, analog signals of the previous line, and vice versa.
摘要翻译：通过使用模拟移位寄存器校正其列车中的信号的时基不稳定性。如在校正视频信号的时基不稳定中使用的，使用成对的模拟移位寄存器。虽然一个寄存器具有以对应于其时基不稳定性的速率定时输入的一个视频线信号的样本，但是另一个寄存器以均匀的速率计时前一行的模拟信号，反之亦然。

42. 发明授权

US3925810A Magnetic recording and/or reproducing system 失效
标题翻译：磁记录和/或再现系统
公开(公告)号：US3925810A
公开(公告)日：1975-12-09
申请号：US54269775
申请日：1975-01-21
申请人： SONY CORP
发明人： ISHIGAKI YOSHIO , NARAHARA HISAAKI , TSUCHIYA TAKAO
IPC分类号： G11B20/02 , H04N9/84 , H04N5/79
CPC分类号： H04N9/84
摘要： In reducing crosstalk between the low frequency, frequencyconverted chrominance portions of h-aligned video signals on adjacent tracks, the frequency converting carrier, but not the entire frequency converted portion, has its polarity inverted at the end of each line interval during the recording of alternate tracks but not during the recording of the remaining alternate tracks. This eliminates the extraneous signal that would otherwise be produced in the balanced modulator of the playback apparatus by any direct voltage offset or transient remanent of a direct voltage offset in the recorded signal.
摘要翻译：在减少相邻轨道上的h取向视频信号的低频，频率转换色度部分之间的串扰时，频率转换载波而不是整个频率转换部分在记录期间在每行间隔结束处具有其极性反转的备用轨道，但不是在记录剩余的备用轨道期间。这消除了在记录信号中的直接电压偏移或直接电压偏移的任何直接电压偏移或瞬态残留的情况下，再现设备的平衡调制器中产生的外来信号。

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