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1. 发明授权

US07174087B2 Playback apparatus and adaptive equalizing circuit with a phase-locked loop coupled thereto 失效
标题翻译：具有与其耦合的锁相环的回放装置和自适应均衡电路
公开(公告)号：US07174087B2
公开(公告)日：2007-02-06
申请号：US09849856
申请日：2001-05-04
申请人： Masafumi Takiguchi , Kazuyuki Iesaka
发明人： Masafumi Takiguchi , Kazuyuki Iesaka
IPC分类号： H04N5/91 , G11B5/035 , H03L7/06
CPC分类号： G11B20/14 , G11B5/0086 , G11B5/035 , G11B5/09 , G11B20/10009 , H03H21/0012
摘要： An equalizing circuit is provided for a playback apparatus not requiring tracking control. A playback signal is supplied to a plurality of unit delay devices which are connected in series, and the signals at the input ends and the output ends are supplied to weighting devices, respectively. Furthermore, the playback signal is supplied to a computation circuit, whereby weighting coefficients are determined. Weighting is performed on the signals from unit delay devices, and these signals are added together by an adder so that the equalization of the playback signal is performed, and the signal is extracted from an output terminal. Simultaneously, in the computation circuit, when the envelope value of the playback signal is within a range the phase lock for the playback signal is used so that the calculation of the weighting coefficients is done, and the coefficients of the weighting devices are changed.
摘要翻译：为不需要跟踪控制的重放装置提供均衡电路。回放信号被提供给串联连接的多个单位延迟装置，输入端和输出端的信号分别被提供给加权装置。此外，重放信号被提供给计算电路，由此确定加权系数。对来自单元延迟装置的信号进行加权，并且通过加法器将这些信号相加在一起，从而执行重放信号的均衡，并且从输出端提取信号。同时，在计算电路中，当重放信号的包络值在使用重放信号的相位锁定的范围内时，使得加权系数的计算完成，并且加权装置的系数被改变。

2. 发明授权

US06678460B1 Magnetic reproducer and magnetic reproduction method 失效
标题翻译：磁再现器和磁再现方法
公开(公告)号：US06678460B1
公开(公告)日：2004-01-13
申请号：US09460866
申请日：1999-12-14
申请人： Isao Kogure , Yasutaka Kotani , Kazuyuki Iesaka , Masanori Kimura , Keiko Takeda , Hisao Osabe
发明人： Isao Kogure , Yasutaka Kotani , Kazuyuki Iesaka , Masanori Kimura , Keiko Takeda , Hisao Osabe
IPC分类号： H04N591
CPC分类号： G11B5/0086 , G11B5/588 , G11B20/10527 , G11B2020/10537 , G11B2020/10879 , G11B2220/91 , H04N5/782 , H04N9/8211
摘要： A magnetic reproducer for reproducing data recorded on a magnetic tape by forming tracks sequentially and obliquely along a longitudinal direction of the magnetic tape, has magnetic heads for reproducing the information by sequentially scanning the tracks formed on the magnetic tape with a first track width for a first recording system or a second track width for a second recording system wider than that for the first recording system. And, a gap width between the magnetic heads is set at a value which is wider than the first track width and narrower than the second track width.
摘要翻译：一种用于通过沿着磁带的纵向方向依次形成轨道来再现记录在磁带上的数据的磁性再现器，具有用于通过以形成在磁带上的轨迹顺序扫描形成磁道的磁头，第一记录系统或第二记录系统的第二轨道宽度比第一记录系统宽。并且，磁头之间的间隙宽度被设定为比第一轨道宽度宽且比第二轨道宽度窄的值。

3. 发明授权

US06674961B1 Magnetic recording device and method, magnetic reproduction device and method, and tape recording medium 失效
标题翻译：磁记录装置和方法，磁再现装置和方法以及磁带记录介质
公开(公告)号：US06674961B1
公开(公告)日：2004-01-06
申请号：US09471699
申请日：1999-12-23
申请人： Hiroya Mori , Yasutaka Kotani , Kazuyuki Iesaka , Hisao Osabe , Masanori Kimura
发明人： Hiroya Mori , Yasutaka Kotani , Kazuyuki Iesaka , Hisao Osabe , Masanori Kimura
IPC分类号： H04N5926
CPC分类号： G11B5/00878 , G11B15/1875 , G11B15/467 , H04N5/772 , H04N5/78263 , H04N9/7921
摘要： In a magnetic recording device and method, a magnetic reproduction method and its method and a tape recording medium, the performance can be improved. In the case of successively and obliquely forming tracks along the longitudinal direction of a second magnetic tape having a width wider than a first magnetic tape and continuously recording recording data for at least two tracks in a digital recording format on each track, each track is to be formed at a predetermined track pitch set based on the recording time and the reproduction signal characteristic. Thereby, recording data based on the digital recording format which is applied to the first magnetic tape can keep a practically sufficient C/N ratio and can be recorded on the second magnetic tape for a long time. And thus, a magnetic recording device and method, a magnetic reproduction device and method, and a tape recording medium capable of improving the performance can be realized.
摘要翻译：在磁记录装置和方法，磁再现方法及其方法和磁带记录介质中，可以提高性能。在沿着宽度比第一磁带宽度大的第二磁带的纵向连续倾斜地形成磁道的情况下，并且在每个磁道上连续记录数字记录格式的至少两个磁道的记录数据，以基于记录时间和再现信号特性的预定轨道间距形成。因此，基于应用于第一磁带的数字记录格式的记录数据可以保持实际上足够的C / N比，并且可以长时间记录在第二磁带上。因此，可以实现能够提高性能的磁记录装置和方法，磁再现装置和方法以及磁带记录介质。

4. 发明授权

US06600871B1 Digital video cassette recorder 失效
标题翻译：数字录像机
公开(公告)号：US06600871B1
公开(公告)日：2003-07-29
申请号：US09307055
申请日：1999-05-07
申请人： Kazuyuki Iesaka , Yasutaka Kotani
发明人： Kazuyuki Iesaka , Yasutaka Kotani
IPC分类号： H04N591
CPC分类号： G11B15/1808 , G11B15/125
摘要： A digital video cassette recorder comprising a plurality of heads provided on a rotary member and performing the recording/playback of the data on slanted tracks in performing helical scanning for a magnetic recording medium with the above mentioned heads, wherein the heads being composed of a first and a second heads being disposed opposing to each other at an angle of 180° and a third head being disposed in a position at an angle of 270° in the direction of rotation from the first head, having the same azimuth angle as that of the second head, the digital video cassette recorder also comprising a changeover switch for switching the first, the second and the third heads, and two modes having different data compression rates from each other, and in the first mode, recording/playback being performed in switching the first and the second heads alternately, and in the second mode, the tape feeding speed is made half and recording/playback being performed once in two rotations in switching the first and the third heads alternately. The fixing heights of heads on the rotary member are made to differ in every head, in order to dissolve the difference in head outputs caused by the difference in azimuth angles related with the direction of orientation of the magnetic recording medium and the recording direction of the slanted tracks and to dissolve the difference in head outputs caused by the imbalance of the side erase at the time of recording.
摘要翻译：一种数字录像机，包括设置在旋转构件上的多个磁头，并且在执行用上述磁头进行磁记录介质的螺旋扫描时，对倾斜轨迹上的数据进行记录/重放，其中磁头由第一并且第二头部以180°的角度彼此相对设置，并且第三头部沿着与第一头部的旋转方向以270°的角度设置，具有与第一头部相同的方位角第二头，数字录像机还包括用于切换第一，第二和第三磁头的转换开关和具有不同数据压缩率的两种模式，并且在第一模式中，在切换中执行记录/重放第一和第二头交替地，并且在第二模式中，将带进给速度设为一半，并且在开关中以两次旋转执行一次记录/重放交替地移动第一和第三头。旋转构件上的头部的固定高度在每个头部上不同，以便解决由与磁记录介质的取向方向和方向相关的方位角差异引起的头部输出的差异倾斜的轨迹并且解决由记录时的侧面擦除的不平衡引起的头部输出的差异。

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