公开(公告)号：US4953161A

公开(公告)日：1990-08-28

申请号：US263304

申请日：1988-10-27

申请人： Akiyoshi Toyama

发明人： Akiyoshi Toyama

IPC分类号： G11B5/48 ,  G11B5/584

CPC分类号： G11B5/4893 ,  G11B5/584

摘要： A recording and reproducing system for performing a read-after-write operation, and for performing automatic tracking. The system includes a magnetic head for recording/reproducing information from/onto a tape. The magnetic head has a first gapped portion and a second gapped portion. The system further includes a reading circuit for reading information recorded on the tape, a writing circuit for writing information onto the tape, a changing device for selectively connecting the first gapped portion to either the reading circuit or the writing circuit, and for selectively connecting the second gapped portion to either the reading circuit or the writing circuit, and a comparator for comparing the outputs from the first and second gapped portions when the first and second gapped portions are each connected to the reading circuit by the changing device, and for outputting a signal representative of that comparison. The system also includes a motor operatively coupled to the output of the comparator for moving the magnetic head in a width direction relative to the tape in accordance with the output of the comparator.

摘要翻译： 一种用于执行写后读取操作并用于执行自动跟踪的记录和再现系统。 该系统包括用于从/从磁带上记录/再现信息的磁头。 磁头具有第一间隙部分和第二间隙部分。 该系统还包括用于读取记录在磁带上的信息的读取电路，用于将信息写入磁带的写入电路，用于选择性地将第一间隙部分连接到读取电路或写入电路的改变装置， 第二间隙部分到读取电路或写入电路，以及比较器，用于当第一和第二间隙部分各自通过改变装置连接到读取电路时，比较来自第一和第二间隙部分的输出，并输出 信号代表该比较。 该系统还包括可操作地耦合到比较器的输出端的马达，用于根据比较器的输出在相对于磁带的宽度方向上移动磁头。

公开(公告)号：US4772967A

公开(公告)日：1988-09-20

申请号：US927487

申请日：1986-11-06

申请人： Hiroyuki Okuda ,  Masaru Doi ,  Yoshiaki Shimizu ,  Takao Yamano ,  Kazuo Ino ,  Koso Ishihara

发明人： Hiroyuki Okuda ,  Masaru Doi ,  Yoshiaki Shimizu ,  Takao Yamano ,  Kazuo Ino ,  Koso Ishihara

IPC分类号： G11B5/008 ,  G11B5/024 ,  G11B5/127 ,  G11B5/48 ,  G11B5/53 ,  G11B5/187 ,  G11B5/23

CPC分类号： G11B5/4893 ,  G11B5/0086 ,  G11B5/024 ,  G11B5/127 ,  G11B5/53

摘要： A magnetic recording apparatus of a helical scanning system comprises a rotary cylinder (13), recording heads (A and B) and an erase head (10) attached to slightly project from a rotating surface (13a) of the cylinder (13). The rotary erase head (10) has a gap (4) comprising a ferrite core half (1) and a Sendust film (3) formed on a ferrite core half (2) opposed to the ferrite core half (1) and having a larger saturation magnetic flux density. In addition, the recording heads (A and B) and the rotary erase head (10) are attached on the rotary cylinder (13) so that an end (P1) located forward with respect to the tape travelling direction (11) of the Sendust film (3) may trace the backward side with respect to the tape travelling direction (11), apart by a distance which is a half of the gap length of the rotary erase head (10), as compared with a forward end (Q) of a recorded track pattern ( 15a) formed on a tape (14) by the recording head (A) scanning immediately after erasing by the rotary erase head (10).

摘要翻译： 螺旋扫描系统的磁记录装置包括旋转圆筒（13），记录头（A和B）以及从气缸（13）的旋转表面（13a）稍微伸出的擦除头（10）。 旋转擦除头（10）具有包括铁氧体磁芯半部（1）的间隙（4）和与铁氧体磁芯半体（1）相对的铁氧体磁心半部（2）上形成的具有较大的铁氧体磁芯半部 饱和磁通密度。 此外，记录头（A和B）和旋转擦除头（10）安装在旋转圆筒（13）上，使得相对于塞浦路斯的磁带行进方向（11）位于前方的端部（P1） 与前端（Q）相比，膜（3）可以相对于磁带行进方向（11）相对于旋转擦除头（10）的间隙长度的一半的距离来追踪向后侧， 通过由旋转擦除头（10）擦除之后立即扫描的记录头（A）形成在带（14）上的记录轨迹图案（15a）。

公开(公告)号：US4685005A

公开(公告)日：1987-08-04

申请号：US514994

申请日：1983-07-18

申请人： Davis S. Fields, Jr.

发明人： Davis S. Fields, Jr.

IPC分类号： G11B15/087 ,  G11B5/008 ,  G11B5/09 ,  G11B5/48 ,  G11B15/02 ,  G11B15/12 ,  G11B20/18 ,  G11B27/36 ,  G11B5/187

CPC分类号： G11B5/00817 ,  G11B15/12 ,  G11B20/1816 ,  G11B27/36 ,  G11B5/4893

摘要： A digital tape drive wherein tape is written, and a read-after-write operation is immediately performed to check the integrity of the write operation, for either direction of tape movement. The tape contains a plurality of parallel data tracks. Two read/write head modules span the entire tape. The read and write gaps of each module are alternately spaced across the width of the tape, such that the write gaps of one module are aligned with the read gaps of the other module. When one module is selected for writing, as a function of the direction of tape movement, the other module is selected to read-after-write check the first module's written data. One module writes odd-track data during one direction of tape movement, and reads even-track data during the opposite direction of tape movement; as the other module writes even-track data during said opposite movement direction, and reads odd-track data during said one movement direction. Common read and write eletronic circuits are switched between the two modules, since each module is using only one of its read and write gap multiples at any given time.

摘要翻译： 写入磁带的数字磁带驱动器，并且立即进行写后读操作，以检查磁带移动的任一方向上的写入操作的完整性。 磁带包含多个并行数据磁道。 两个读/写头模块跨越整个磁带。 每个模块的读取和写入间隙在带的宽度上交替地间隔开，使得一个模块的写入间隙与另一个模块的读取间隙对准。 当一个模块被选择用于写入时，根据磁带移动的方向，另一个模块被选中以便读写检查第一个模块的写入数据。 一个模块在磁带移动的一个方向上写入奇数轨道数据，并在磁带移动的相反方向读取偶数轨道数据; 因为另一个模块在所述相对移动方向上写入偶数轨道数据，并且在所述一个移动方向上读取奇数轨道数据。 在两个模块之间切换通用读写电子电路，因为每个模块在任何给定的时间只使用其读取和写入间隙倍数中的一个。

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：US4405958A

公开(公告)日：1983-09-20

申请号：US358633

申请日：1982-03-16

申请人： Masaya Hijikigawa

发明人： Masaya Hijikigawa

IPC分类号： G11B15/087 ,  G11B5/39 ,  G11B5/48 ,  G11B15/60 ,  G11B15/665 ,  G11B27/10 ,  G11B27/32 ,  G11B5/12

CPC分类号： G11B15/6656 ,  G11B27/107 ,  G11B27/326 ,  G11B5/39 ,  G11B5/4893 ,  G11B2220/90

摘要： A magnetic record-reproduction device is provided for controlling a program selection system of a tape containing a recording member and a base element. The recording member records cue signals indicating positions of programs on the tape to be reproduced. The base element supports the recording member. A magnetoresistive head comes into contact with the base element for detecting and reproducing the cue signals recorded in the recording member.

摘要翻译： 提供磁记录再现装置，用于控制包含记录部件和基体元件的带的程序选择系统。 记录构件记录指示要再现的磁带上节目的位置的提示信号。 基座支撑记录部件。 磁阻头与基座元件接触，用于检测和再现记录在记录元件中的提示信号。

公开(公告)号：US4225889A

公开(公告)日：1980-09-30

申请号：US964684

申请日：1978-11-29

申请人： Toshiomi Yabu ,  Tatsuo Wada ,  Kouichi Yamada ,  Tadashi Yoshino

发明人： Toshiomi Yabu ,  Tatsuo Wada ,  Kouichi Yamada ,  Tadashi Yoshino

IPC分类号： G11B15/087 ,  G11B5/48 ,  G11B15/12 ,  G11B27/32 ,  G11B5/02 ,  G11B27/30

CPC分类号： G11B5/4893 ,  G11B15/12 ,  G11B27/32 ,  G11B2220/90

摘要： A magnetic tape recording and reproducing apparatus provided with means for recording a cue-signal which serves to mark a predetermined point of a magnetic tape on which video signals are recorded by a rotary magnetic head. The cue-signal is recorded by a full erasing head by supplying thereto a cue-signal current having a frequency lower than the frequency of the erasing current. For example, the cue-signal current is generated by using the control signal for synchronizing the rotation of the rotary head with the tape movement.

摘要翻译： 一种磁带记录和再现装置，其具有用于记录提示信号的装置，其用于标记由旋转磁头记录有视频信号的磁带的预定点。 通过向全擦除头提供具有低于擦除电流的频率的频率信号电流来记录提示信号。 例如，通过使用用于使旋转头的旋转与带移动同步的控制信号来产生提示信号电流。

公开(公告)号：US4180833A

公开(公告)日：1979-12-25

申请号：US877867

申请日：1978-02-15

申请人： Masaru Nishikawa ,  Toshihiko Numakura ,  Jun Hirai

发明人： Masaru Nishikawa ,  Toshihiko Numakura ,  Jun Hirai

IPC分类号： G11B5/027 ,  G11B5/48 ,  G11B5/53 ,  G11B23/00 ,  H04N5/7826 ,  H04N5/783 ,  G11B5/02 ,  H04N5/78

CPC分类号： H04N5/783 ,  G11B23/0007 ,  G11B5/4893 ,  G11B5/534 ,  H04N5/78263

摘要： In an apparatus for reproducing video signals which are recorded as modulations of a carrier on a record medium, such as a magnetic tape, in successive, abutting parallel record tracks, with the signals being recorded in alternating tracks with different first and second azimuth angles, first and second magnetic heads are provided for sequentially scanning the tracks in which signals are recorded with the first and second azimuth angles, respectively, and the first and second magnetic heads having azimuth angles corresponding to the first and second azimuth angles of the respective tracks to be scanned thereby. Each of the magnetic heads is dimensioned and guided in the direction transverse to the direction along the respective track being scanned so as to overlap an adjacent track by a distance .DELTA.W=n.lambda./tan .theta.(n=1,2, . . .), in which .lambda. is the wavelength of the carrier as modulated by synchronizing signal portions of the video signals recorded in such adjacent track, and .theta. is the difference between the first and second azimuth angles of the heads. In this manner, cross-talk from the adjacent track is substantially attenuated.

摘要翻译： 在用于再现被记录为诸如磁带的记录介质上的载体的调制的视频信号的装置中，在连续的邻接并行记录轨道中，信号被记录在具有不同的第一和第二方位角的交替轨迹中， 提供第一和第二磁头以分别以第一和第二方位角顺序地扫描记录有信号的轨道，并且第一和第二磁头具有对应于各个轨道的第一和第二方位角的方位角到 被扫描。 每个磁头的尺寸和横向于沿着被扫描的相应轨道的方向被引导，以便使相邻轨道重叠距离DELTA W =nλ/tanθ（n = 1,2，...）。 ），其中λ是通过使记录在这种相邻轨道中的视频信号的信号部分同步来调制的载波的波长，θ是磁头的第一和第二方位角之间的差。 以这种方式，来自相邻轨道的串扰实质上是衰减的。

公开(公告)号：US4149198A

公开(公告)日：1979-04-10

申请号：US609825

申请日：1975-09-02

申请人： Michael I. Behr ,  Norman S. Blessum ,  Wilfred D. Iwan

发明人： Michael I. Behr ,  Norman S. Blessum ,  Wilfred D. Iwan

IPC分类号： G11B5/58 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B21/10

CPC分类号： G11B21/081 ,  G11B5/488 ,  G11B5/4886 ,  G11B5/5556 ,  G11B5/59688 ,  G11B21/10 ,  G11B5/4893

摘要： Method and apparatus for providing coarse and fine radial positioning of a multiple head assembly relative to the concentric tracks of a rotatable magnetic disk. In addition to a plurality of data heads, the head assembly also includes a pair of position sensing heads having skewed core gaps disposed at an angle with respect to each other. These position sensing heads are used for prerecording concentric position control tracks on the disk as well as for subsequent sensing of position control information during both coarse and fine positioning operations. The position control information prerecorded in the position control tracks is specially chosen so as to provide a pair of pulse trains during position sensing having characteristics such that highly accurate and reliable control of head position can be achieved based upon a detection of the coincidence relationship between predetermined pulses of the respective pulse trains.

摘要翻译： 用于提供多头组件相对于可旋转磁盘的同心轨道进行粗略和精细的径向定位的方法和装置。 除了多个数据头之外，头组件还包括一对位置感测头，其具有相对于彼此成一定角度设置的倾斜的芯间隙。 这些位置检测头用于预先记录盘上的同心位置控制轨迹，以及用于在粗略和精细定位操作期间随后感测位置控制信息。 预先记录在位置控制轨迹中的位置控制信息是特别选择的，以便在位置检测期间提供一对脉冲序列，其特征在于，可以基于检测预定位置之间的重合关系来实现对头部位置的高度准确和可靠的控制 脉冲列的脉冲。

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：US3959824A

公开(公告)日：1976-05-25

申请号：US436598

申请日：1974-01-25

申请人： Nobuaki Ohi ,  Kanzi Ito ,  Katsuo Kamata ,  Masaru Sato

发明人： Nobuaki Ohi ,  Kanzi Ito ,  Katsuo Kamata ,  Masaru Sato

IPC分类号： G11B5/17 ,  G11B5/265 ,  G11B5/48 ,  G11B5/20

CPC分类号： G11B5/17 ,  G11B5/2652 ,  G11B5/4893

摘要： A two gap read/write head assembly including a read pole-piece and a write pole-piece which are placed in close proximity to each other in a common housing, a first auxiliary magnetic gap means being provided adjacent to and near the gap of the read pole-piece but insuring the first auxiliary magnetic gap means does not engage with the magnetic recording medium so that any feedthrough signal due to a write signal may be effectively cancelled, and/or a second auxiliary magnetic gap means being provided adjacent to and near the gap of the write pole-piece but insuring the second auxiliary magnetic gap means does not engage with the magnetic recording medium so that any leakage flux produced at the gap of the write pole-piece may be effectively cancelled by a leakage flux created at the second auxiliary magnetic gap means to reduce the feedthrough signal.