公开(公告)号：US4445150A

公开(公告)日：1984-04-24

申请号：US322367

申请日：1981-11-17

申请人： Heitaro Nakajima ,  Kenkichi Umeda ,  Youichi Kodera ,  Noriaki Naito ,  Hiroyuki Yamauchi ,  Isao Matsumoto ,  Shouichi Nakamura ,  Katsuo Takada ,  Ken Shiga ,  Yoshihito Yamamoto

发明人： Heitaro Nakajima ,  Kenkichi Umeda ,  Youichi Kodera ,  Noriaki Naito ,  Hiroyuki Yamauchi ,  Isao Matsumoto ,  Shouichi Nakamura ,  Katsuo Takada ,  Ken Shiga ,  Yoshihito Yamamoto

IPC分类号： G11B23/18 ,  G09B5/06 ,  G11B5/48 ,  G11B15/00 ,  G11B23/36 ,  G11B27/32 ,  G11B27/34 ,  G11B31/00 ,  H04N5/782 ,  G11B15/02 ,  G11B5/43

CPC分类号： G11B5/4893 ,  G09B5/062 ,  G11B15/005 ,  G11B27/322 ,  G11B27/34 ,  G11B31/00 ,  H04N5/782

摘要： A method of recording and reproducing audio signals and corresponding visual signals in parallel tracks extending in the longitudinal direction on a magnetic tape, includes the steps of recording the audio signals in first and second primary tracks on opposite sides of the tape in the widthwise direction thereof; and alternately recording a first visual information signal corresponding to the audio signal in the first primary tracks and a second visual information signal corresponding to the audio signal in the second primary tracks in a single secondary track positioned in the center of the tape in the widthwise direction thereof, the first visual information signal being recorded in first information blocks in the secondary track and the second visual information signal being recorded in second information blocks in the secondary track in an alternating relation with the first information blocks such that only the first visual information signal is reproduced when reproducing the audio signal from the first primary tracks and only the second visual information signal is reproduced when reproducing the audio signal from the second primary tracks. The preset invention is also directed to apparatus for performing the above method.

摘要翻译： 在磁带上沿长度方向延伸的并行轨道中记录和重放音频信号和对应的视觉信号的方法包括以下步骤：将音频信号记录在带宽度方向的相对侧上的第一和第二主音轨中 ; 并且在第一主要磁道中交替地记录与音频信号相对应的第一视觉信息信号和对应于第二主音轨中的音频信号的第二视觉信息信号，该第二视觉信息信号位于沿磁带的中心位于宽度方向上的单个辅助磁道中 第一视觉信息信号被记录在辅助磁道中的第一信息块中，并且第二视觉信息信号以与第一信息块交替的关系记录在辅助磁道中的第二信息块中，使得仅第一视觉信息信号 当再现来自第一主音轨的音频信号时再现，并且当再现来自第二主音轨的音频信号时，再现第二视觉信息信号。 本发明还涉及用于执行上述方法的装置。

公开(公告)号：US4079426A

公开(公告)日：1978-03-14

申请号：US701513

申请日：1976-07-01

申请人： Kenkichi Umeda ,  Noriaki Naito

发明人： Kenkichi Umeda ,  Noriaki Naito

IPC分类号： G11B5/00 ,  G11B5/008 ,  G11B5/02 ,  G11B5/48 ,  G11B15/06 ,  G11B5/22

CPC分类号： G11B15/06 ,  G11B5/00 ,  G11B5/008 ,  G11B5/00817 ,  G11B5/00826 ,  G11B5/00878 ,  G11B5/02 ,  G11B5/4893

摘要： An azimuth angle other than zero can occur if magnetic tape vibrates or moves in the tape width direction during recording or playback mode and this can result in azimuth loss which is a function of the track width angle of misalignment and the wave length of the signals. The wider the tape width the greater the azimuth loss and the lower the tape transport speed the greater the azimuth loss. Thus, the present invention varies the track width and speed so as to obtain optimum reproduction fidelity by combining two or more heads to obtain the desired results.

摘要翻译： 如果磁带在记录或重放模式下振动或沿磁带宽度方向移动，则可能会发生零点以外的方位角，这可能导致方位角损失，这是轨迹宽度未对准角度和信号波长的函数。 磁带宽度越宽，方位角损耗越大，磁带传送速度越慢，方位角损耗就越大。 因此，本发明通过组合两个或更多个磁头来改变磁道宽度和速度以便获得最佳再现保真度，以获得期望的结果。

公开(公告)号：US3977023A

公开(公告)日：1976-08-24

申请号：US481807

申请日：1974-06-21

申请人： Shoichi Nakamura ,  Noriaki Naito

发明人： Shoichi Nakamura ,  Noriaki Naito

IPC分类号： H04B1/62 ,  G11B20/04 ,  G11B20/24 ,  G11B23/00 ,  H03G7/00 ,  H03G7/06 ,  H03G9/18 ,  G11B5/02

CPC分类号： G11B23/0007 ,  G11B20/24 ,  H03G7/06 ,  H03G9/18

摘要： A tape recorder comprises a noise reducing circuit provided at its output side with a first switch for changing over the circuit from its operative condition to its inoperative condition and vice versa and a second switch operatively connected to the first switch and for changing over the signal level. The use of the noise reducing circuit causes a decrease of the standard point of the recording level and an increase of the standard point of the reproduction level so as to increase the dynamic range of the tape recorder.

摘要翻译： 磁带录音机包括在其输出侧设置有第一开关的噪声降低电路，用于将电路从其操作状态转换到其不工作状态，反之亦然;以及第二开关，其可操作地连接到第一开关并用于切换信号电平 。 使用降噪电路导致记录电平的标准点的减小和再现电平的标准点的增加，从而增加磁带录音机的动态范围。