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1. 发明授权

US4405953A Magnetic recording and reproducing device 失效
标题翻译：磁记录和再现装置
公开(公告)号：US4405953A
公开(公告)日：1983-09-20
申请号：US315337
申请日：1981-10-26
申请人： Akira Inomata , Tsunao Hasegawa , Yasushi Ohtake
发明人： Akira Inomata , Tsunao Hasegawa , Yasushi Ohtake
IPC分类号： G11B5/02 , G11B5/027 , G11B5/035 , G11B5/45
CPC分类号： G11B5/027 , G11B5/02 , G11B5/035
摘要： This invention relates to a magnetic recording and reproducing device in which automatic settings of optimum recording bias current, optimum recording level and optimum recording equalization characteristic are successively accomplished in this order. The settings of the optimum recording conditions are achieved with high accuracy within short period of time by a computer control using a microprocessor.
摘要翻译：本发明涉及一种磁记录和再现装置，其中以该顺序连续完成最佳记录偏置电流，最佳记录电平和最佳记录均衡特性的自动设置。通过使用微处理器的计算机控制，在短时间内以高精度实现最佳记录条件的设置。

2. 发明授权

US4297730A Magnetic recording and reproducing device 失效
标题翻译：磁记录和再现装置
公开(公告)号：US4297730A
公开(公告)日：1981-10-27
申请号：US174389
申请日：1979-11-01
申请人： Hidetaka Kadowaki , Akira Inomata , Kiyoshi Yanagida , Tsunao Hasegawa , Satoshi Ishii , Yasushi Ohtake
发明人： Hidetaka Kadowaki , Akira Inomata , Kiyoshi Yanagida , Tsunao Hasegawa , Satoshi Ishii , Yasushi Ohtake
IPC分类号： G11B5/02 , H03G3/20 , H03G5/16 , G11B5/47 , G11B15/12
CPC分类号： H03G3/3026 , G11B5/02 , H03G5/165
摘要： This invention relates to a magnetic recording and reproducing device in which automatic settings of optimum recording bias current, optimum recording level and optimum recording equalization characteristic are successively accomplished in this order. The settings of the optimum recording conditions are achieved with high accuracy within short period of time by a computer control using a microprocessor.
摘要翻译：本发明涉及一种磁记录和再现装置，其中以该顺序连续完成最佳记录偏置电流，最佳记录电平和最佳记录均衡特性的自动设置。通过使用微处理器的计算机控制，在短时间内以高精度实现最佳记录条件的设置。

3. 发明授权

US4352130A Magnetic sound recorder having computer-controlled adjusting device 失效
标题翻译：磁记录仪具有电脑控制调节装置
公开(公告)号：US4352130A
公开(公告)日：1982-09-28
申请号：US93986
申请日：1979-11-14
申请人： Tsunao Hasegawa , Yasushi Ohtake
发明人： Tsunao Hasegawa , Yasushi Ohtake
IPC分类号： G11B5/027 , G11B5/03 , G11B5/47
CPC分类号： G11B5/03
摘要： A magnetic-tape sound recorder which features a computer-controlled adjusting device capable of automatically adjusting the recording signal level and the recording bias current depending upon the magnetic tape to be put to use on the sound recorder.
摘要翻译：一种具有计算机控制的调节装置的磁带录音机，其能够根据要在录音机上使用的磁带来自动调整记录信号电平和记录偏置电流。

4. 发明授权

US4344094A Method and apparatus detecting and setting optimum tape recording bias 失效
标题翻译：方法和设备检测和设置最佳的磁带记录偏差
公开(公告)号：US4344094A
公开(公告)日：1982-08-10
申请号：US96265
申请日：1979-11-21
申请人： Yasushi Ohtake , Tsunao Hasegawa
发明人： Yasushi Ohtake , Tsunao Hasegawa
IPC分类号： G11B5/027 , G11B5/03 , G11B5/47 , G11B27/36
CPC分类号： G11B5/03
摘要： A method and an apparatus for detecting and automatically setting optimum recording bias in a tape recorder in which first and second test signals of low and high audio frequencies, respectively, are alternately recorded on a recording medium. While these are being recorded, the recording bias applied to the recording medium is varied in a plurality of steps between upper and lower limits. The tape is then rewound and the reproduced first and second signals are compared to determine at which recording bias step the reproduced levels of the first and second signals are equal to one another. The recording bias for normal recording is then set in accordance with the bias level present at the selected step.
摘要翻译：一种在磁带录像机中检测和自动设定最佳记录偏差的方法和装置，其中分别将低和高音频的第一和第二测试信号交替地记录在记录介质上。当记录这些记录时，施加到记录介质的记录偏移在上限和下限之间的多个步骤中变化。然后将磁带倒带，并将再现的第一和第二信号进行比较，以确定在哪个记录偏置步骤，第一和第二信号的再现电平彼此相等。然后根据所选步骤中存在的偏置电平来设置用于正常记录的记录偏差。

5. 发明授权

US4639681A Waveform reshaping circuit 失效
标题翻译：波形整形电路
公开(公告)号：US4639681A
公开(公告)日：1987-01-27
申请号：US703966
申请日：1985-02-21
申请人： Tsunao Hasegawa
发明人： Tsunao Hasegawa
IPC分类号： H03K5/08
CPC分类号： H03K5/088
摘要： In a waveform reshaping circuit for a digital signal which has become distorted, the threshold level is varied according to the codes of bits preceding each bit in a bit string forming data in the digital signal so that, even if coding interference takes place, a reshaped, undistorted digital signal outputted by the circuit is substantially the same in waveform as the original digital signal.
摘要翻译：在已经变形的数字信号的波形整形电路中，阈值电平根据形成数字信号中的数据的比特串中的每个比特之前的比特码而变化，使得即使发生编码干扰，重新形成，由电路输出的未失真数字信号与原始数字信号的波形基本相同。

6. 发明授权

US5267095A Digital reconstructing of harmonics to extend band of frequency response 失效
标题翻译：数字重构谐波以扩展频率响应带
公开(公告)号：US5267095A
公开(公告)日：1993-11-30
申请号：US781372
申请日：1991-10-23
申请人： Tsunao Hasegawa , Masahiro Sui , Tomoyasu Yamada
发明人： Tsunao Hasegawa , Masahiro Sui , Tomoyasu Yamada
IPC分类号： G11B20/00 , G11B20/10 , H03M1/08
CPC分类号： G11B20/10527
摘要： A PCM digital audio signal playback apparatus is provided for extracting from the digital audio signal read out from a recording medium an original signal component ranging lower than 1/2 of its sampling frequency fs, producing a harmonic from the original signal component, extracting a harmonic component ranging higher than fs/2 from the harmonic, and adding the harmonic component to the original signal component. Accordingly, a high-frequency carrying signal, e.g. an impulse, is processed without causing ringings in the waveform response.

7. 发明授权

US5461604A PCM digital audio signal playback apparatus 失效
标题翻译： PCM数字音频信号播放装置
公开(公告)号：US5461604A
公开(公告)日：1995-10-24
申请号：US291504
申请日：1994-08-17
申请人： Tsunao Hasegawa
发明人： Tsunao Hasegawa
IPC分类号： H03H17/00 , G11B20/10 , H03H17/02 , H03H17/06
CPC分类号： H03H17/028 , G11B20/10527 , H03H17/0621
摘要： A PCM digital audio signal playback apparatus is provided for multiplying a PCM digital audio signal to n times the sampling rate, interpolating extra sampling points with zero signals, and spline-function interpolating with an FIR digital filter. Accordingly, a sound reproduced from the output audio signal of the apparatus will be more natural as compared with common high-cut filtering with a high-cut filter.
摘要翻译：提供PCM数字音频信号播放装置，用于将PCM数字音频信号乘以采样率的n倍，用零信号内插多个采样点，以及用FIR数字滤波器进行样条函数内插。因此，与使用高切滤波器的普通高切滤波相比，从装置的输出音频信号再现的声音将更加自然。

8. 发明授权

US4312020A Frequency response adjusting device for magnetic sound recorder 失效
标题翻译：磁记录仪频率响应调整装置
公开(公告)号：US4312020A
公开(公告)日：1982-01-19
申请号：US058326
申请日：1979-07-17
申请人： Tsunao Hasegawa
发明人： Tsunao Hasegawa
IPC分类号： G11B5/035 , G11B27/36 , H03G5/04 , G11B5/45 , G11B5/02
CPC分类号： H03G5/04 , G11B27/36 , G11B5/035
摘要： A device for adjusting the frequency response characteristic of a magnetic sound recorder at relatively low and high frequencies, wherein the signal level of the recording signal to be supplied to the recording head of the recorder and the amount of compensation for the frequency response characteristic of the recording signal are adjusted by visual observation of a visible signal produced by one of electrically actuated light-emissive semiconductor elements which are to be selectively energized depending upon the relationship between the signal level of the playback signal and a reference signal which may be one of a plurality of predetermined reference signals or may be variable with the level of the recording signal.
摘要翻译：一种用于在相对低和高频率下调整磁记录器的频率响应特性的装置，其中提供给记录器的记录头的记录信号的信号电平和对于记录器的频率响应特性的补偿量通过目视观察由电动致动的发光半导体元件之一产生的可视信号来调节记录信号，该电致动发光半导体元件将根据重放信号的信号电平与参考信号之间的关系被选择性地激励，该参考信号可以是多个预定的参考信号或者可以随着记录信号的电平而变化。

9. 发明授权

US4719525A Track position correction for a helical scan magnetic playback 失效
标题翻译：轨道位置校正用于螺旋扫描磁回放
公开(公告)号：US4719525A
公开(公告)日：1988-01-12
申请号：US853291
申请日：1986-04-17
申请人： Tsunao Hasegawa , Ichiro Miyake , Ryuichiro Yoshimura
发明人： Tsunao Hasegawa , Ichiro Miyake , Ryuichiro Yoshimura
IPC分类号： G11B5/588 , G11B5/58
CPC分类号： G11B5/588
摘要： A control circuit for a helical scan playback, in which a rotary head is moved transversely by a varying amount. The transverse movement can be either a multi-valued tracking position error correction signal or a saw-tooth waveform, effective during a location data strip, for compensating for the fast movement of the tape during a scan operation.
摘要翻译：一种用于螺旋扫描回放的控制电路，其中旋转头横向移动不同量。横向移动可以是在位置数据条带期间有效的多值跟踪位置误差校正信号或锯齿波形，用于补偿扫描操作期间带的快速移动。

10. 发明授权

US4553180A Recording start position setting device for use in a tape recorder 失效
标题翻译：用于磁带录音机的记录开始位置设定装置
公开(公告)号：US4553180A
公开(公告)日：1985-11-12
申请号：US646491
申请日：1984-09-04
申请人： Tsunao Hasegawa
发明人： Tsunao Hasegawa
IPC分类号： G11B15/02 , G11B27/024 , G11B27/22 , G11B15/00
CPC分类号： G11B27/024 , G11B15/02 , G11B27/22
摘要： A device for setting the start position for recording on a magnetic tape includes a leader tape detector, a signal detector for determining whether or not a prerecorded signal exists on the tape, and mechanisms for setting the recording start location at a position following the prerecorded data by a predetermined amount. The device also functions to automatically set the recording start position at a correct position on the reverse side of the tape if it is determined that the originally scanned side is fall.
摘要翻译：用于设置用于在磁带上记录的开始位置的装置包括引导带检测器，用于确定磁带上是否存在预先记录的信号的信号检测器，以及用于将记录开始位置设置在预记录数据之后的位置的机构预定量。如果确定原始扫描面掉落，该装置还用于将记录开始位置自动设置在磁带背面的正确位置。

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