专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5241434A Magnetic recording signal reproducing apparatus 失效
公开(公告)号：US5241434A
公开(公告)日：1993-08-31
申请号：US697022
申请日：1991-05-08
申请人： Kaneyuki Okamoto , Hideo Nishijima , Yoshiaki Umehara , Yuji Inaba
发明人： Kaneyuki Okamoto , Hideo Nishijima , Yoshiaki Umehara , Yuji Inaba
IPC分类号： G11B5/588 , G11B15/43 , G11B15/60
CPC分类号： G11B15/602 , G11B15/43 , G11B5/588
摘要： The specification discloses a magnetic recording signal reproducing apparatus for controlling a magnetic tape and reproducing magnetic heads.In the magnetic recording signal reproducing apparatus of the invention, a magnetic tape which is moved for magnetic heads attached to a rotary cylinder is traced by the magnetic heads and signals recorded on tracks of the magnetic tape are reproduced. A construction of the apparatus includes a tracking control system, a tape tension control system, and an apparatus for selectively switching operations of both of the control systems. The tracking control system includes: an apparatus, attached to the rotary cylinder, for moving the magnetic heads in the width direction of the tracks in accordance with a tracking signal; and an apparatus for sampling the signals detected by the magnetic heads, for comparing a preceding sampled value with a present sampled value, and for generating the tracking signal such that the present sampled value is larger than the preceding sampled value. The tape tension control system includes: an apparatus for detecting changes per predetermined time in levels of the signals detected by the magnetic head; an apparatus for giving a tension to the moving magnetic tape and for adjusting the tension in accordance with a tension control signal; and an apparatus for generating the tension control signal to adjust the tension according to change amounts per predetermined time of the signal levels to a reference value. Further, the switching apparatus includes switching means for receiving the signals detected by the magnetic heads and for selectively energizing either one of the tracking control system and the tape tension control system in accordance with the levels of the signals. Another magnetic recording signal reproducing apparatus according to the invention comprises: two magnetic heads arranged to a cylinder so as to simultaneously trace adjacent tracks; an apparatus, attached to the cylinder, for individually moving the two magnetic heads in the width direction of the tracks in accordance with a head position control signal; and an apparatus for generating the head position control signal to move the magnetic heads in the width direction of the tracks in a manner such that when the recorded signals are reproduced at a speed different from a tape moving speed upon recording, amplitude levels of the reproduction signals detected by the two magnetic heads locating at predetermined track positions have a relation of opposite phases.

2. 发明授权

US5220477A Cassette tape-loading apparatus 失效
标题翻译：盒带装载装置
公开(公告)号：US5220477A
公开(公告)日：1993-06-15
申请号：US668127
申请日：1991-03-12
申请人： Tomohide Sorihashi , Shigemitsu Higuchi , Hideo Nishijima , Yuji Inaba
发明人： Tomohide Sorihashi , Shigemitsu Higuchi , Hideo Nishijima , Yuji Inaba
IPC分类号： G11B15/43 , G11B15/665
CPC分类号： G11B15/665 , G11B15/43
摘要： A cassette tape-loading apparatus applied to a magnetic recording and reproducing apparatus using a cassette tape comprises a device for determining the amount of rotation of supply and take-up reels, a device for detecting the rotational direction of the reels, and a device for detecting the amount of tape drawn out of the cassette. Before loading the cassette tape, the ratio of winding diameter between the supply and take-up reels is computed, and the result is used to set the torque of the reel-driving motors and start the loading operation. At the time of loading, on the other hand, the amount of rotation of the two reels is determined, and the winding diameters of the reels computed from the winding diameter ratio and the amount of drawn-out tape thereby to set a proper tension of the magnetic tape. Since the tension applied to the magnetic tape and the torques of the reel motors are set in accordance with the winding diameter ratio and the winding diameters, magnetic tape of substantially equal amount is drawn out of each of the two reels, with the result that the magnetic tape is not subjected to an abnormal tension, thereby making possible a stable cassette tape-loading operation without damaging the tape or displacing the tape position.
摘要翻译：使用盒式磁带的应用于磁记录和再现装置的盒式磁带装载装置包括用于确定供应和卷取卷轴的旋转量的装置，用于检测卷轴的旋转方向的装置，以及用于检测从磁带盒中抽出的磁带的数量。在装入盒式磁带之前，计算供给卷轴和卷取卷轴之间的卷绕直径的比例，结果用于设定卷轴驱动电机的转矩并开始加载操作。另一方面，在装载时，确定两个卷轴的旋转量，并且根据卷绕直径比计算出的卷轴的卷绕直径和拉出卷的数量，从而设定适当的张力磁带。由于施加到磁带的张力和卷轴电动机的转矩根据卷绕直径比和卷绕直径设定，所以两个卷轴中的每一个卷取出大致相等量的磁带，结果是磁带不会受到异常张力，从而使得可以稳定的盒式磁带装载操作而不损坏磁带或移动磁带位置。

3. 发明授权

US5138504A Tape transport control apparatus for switching from high speed reel drive to low speed capstan drive without stopping the tape 失效
标题翻译：磁带传送控制装置，用于在不停止磁带的情况下从高速卷轴驱动切换到低速主导轴驱动
公开(公告)号：US5138504A
公开(公告)日：1992-08-11
申请号：US493407
申请日：1990-03-14
申请人： Hideo Nishijima , Kooji Kaniwa , Kouji Fujita , Yuji Inaba
发明人： Hideo Nishijima , Kooji Kaniwa , Kouji Fujita , Yuji Inaba
IPC分类号： G11B15/46 , G11B15/467 , G11B15/48
CPC分类号： G11B15/48 , G11B15/46 , G11B15/4675
摘要： A tape transport control apparatus relating to changing means of high speed reel control transport and low speed capstan control transport in a tape transport control of a magnetic recording regenerative apparatus or the like. Particularly in a period of transition from the high speed driving state to the low speed driving state, a capstan motor is controlled through means for comparing phase of the control signal of the tape transport speed regenerated on the tape with phase of the capstan frequency generator signal of the capstan, and after the phase comparing means detects that the tape speed and the capstan rotational speed are coincident, the pinch roller is pressed against the capstan.
摘要翻译：一种磁带传送控制装置，涉及在磁记录再生设备等的磁带传送控制中的高速卷轴控制传输和低速主导轴控制传输的改变装置。特别是在从高速驱动状态向低速驱动状态转变的时段中，主导马达通过用于比较在带上再生的带传送速度的控制信号与主导轴频率发生器信号的相位的相位的装置进行控制并且在相位比较装置检测到磁带速度和主导轴转速一致之后，压紧辊被压靠在主导轴上。

4. 发明授权

US5392163A Digital video signal reproducing apparatus with compression and expansion of playback time 失效
标题翻译：具有压缩和扩展播放时间的数字视频信号再现装置
公开(公告)号：US5392163A
公开(公告)日：1995-02-21
申请号：US161455
申请日：1993-12-06
申请人： Shigemitsu Higuchi , Atsuo Suga , Yuji Inaba , Toshiro Aizawa
发明人： Shigemitsu Higuchi , Atsuo Suga , Yuji Inaba , Toshiro Aizawa
IPC分类号： G11B15/43 , G11B15/467 , G11B20/00 , G11B20/10 , H04N5/783 , H04N5/919 , H04N5/92 , H04N5/926 , H04N9/802 , H04N5/78
CPC分类号： H04N5/926 , G11B15/43 , G11B15/4671 , G11B20/00007 , H04N5/783 , H04N5/919 , H04N9/802
摘要： For the purpose of data compression and expansion in the playback mode reproducing data including video data and audio data recorded on a magnetic tape, a relative speed signal is generated from a circuit on the basis of the moving speed of the magnetic tape and the rotation speed of a head drum, and the characteristic of the recorded data is controlled according to this relative speed signal. The tension of the magnetic tape is detected by a circuit, and the phase difference between the detected tape tension signal and a reel rotation speed command signal is detected by a circuit so as to control the tape tension according to the detected phase difference. When a target value of the drum rotation speed is changed, a drum drive signal is changed stepwise at a predetermined time interval, and the amount of delay of a drum rotation reference signal delayed according to a signal indicative of the rotation speed of a capstan is changed, so as to determine the range in which both the capstan rotation speed and the drum rotation speed can be changed. Interfaces are disposed between a system controller and a pitch controller so as to control the tone pitch of the audio signal according to the capstan rotation speed signal.
摘要翻译：为了在重放模式下进行数据压缩和扩展，再现包括记录在磁带上的视频数据和音频数据的数据，基于磁带的移动速度和转速，从电路产生相对速度信号并且根据该相对速度信号控制记录数据的特性。通过电路检测磁带的张力，通过电路检测检测到的带张力信号和卷轴转速指令信号之间的相位差，以根据检测到的相位差来控制带张力。当滚筒旋转速度的目标值改变时，滚筒驱动信号以预定的时间间隔逐步改变，并且根据表示主导体的转速的信号而延迟的滚筒旋转基准信号的延迟量是改变，以便确定可以改变主导轮转速和转鼓旋转速度的范围。接口设置在系统控制器和俯仰控制器之间，以便根据主导轴转速信号来控制音频信号的音调。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式