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1. 发明申请

US20040090705A1 Magnetic head including recording device and servo device, and magnetic recording apparatus and magnetic recording/reproducing apparatus including the magnetic head 审中-公开
标题翻译：包括记录装置和伺服装置的磁头以及包括磁头的磁记录装置和磁记录/重放装置
公开(公告)号：US20040090705A1
公开(公告)日：2004-05-13
申请号：US10702340
申请日：2003-11-06
申请人： Alps Electric Co., Ltd.
发明人： Katsuya Kikuiri
IPC分类号： G11B005/147 , G11B005/41 , G06F012/14
CPC分类号： G11B15/4678 , G11B5/0086 , G11B5/584
摘要： A magnetic recording/reproducing apparatus includes a servo head amplifier, including first and second signal processors, comparator circuit, and tape speed controller. The first signal processor processes a first signal read from first servo device into a third signal, and the second signal processor processes a second signal read from second servo device into a fourth signal. The comparator circuit compares the third and fourth signals. If a signal output difference exists, the tape speed controller changes the magnetic tape transport speed, so that a signal is recorded to form a signal track with constant width. Therefore, it is possible to provide a magnetic head capable of stably recording signals to form signal tracks with constant width using servo technology, a magnetic recording apparatus including the magnetic head, and a magnetic recording/reproducing apparatus which can stably record signals to form signal tracks with constant width and restrict variations in reproduction signals.
摘要翻译：磁记录/重放装置包括一个包括第一和第二信号处理器，比较器电路和磁带速度控制器的伺服磁头放大器。第一信号处理器将从第一伺服装置读取的第一信号处理成第三信号，并且第二信号处理器将从第二伺服装置读取的第二信号处理成第四信号。比较器电路比较第三和第四信号。如果存在信号输出差异，则磁带速度控制器改变磁带传输速度，从而记录信号以形成具有恒定宽度的信号轨道。因此，可以提供一种能够稳定地记录信号的磁头，以使用伺服技术形成具有恒定宽度的信号轨道，包括该磁头的磁记录装置以及能够稳定地记录信号以形成信号的磁记录/重放装置具有恒定宽度的轨道并限制再现信号的变化。

2. 发明申请

US20010043793A1 Variable-mode information signal reproduction apparatus with tracking control 失效
公开(公告)号：US20010043793A1
公开(公告)日：2001-11-22
申请号：US09901700
申请日：2001-07-11
发明人： Taizou Hori , Yasuyuki Tanaka
IPC分类号： H04N005/91
CPC分类号： H04N9/7921 , G11B15/087 , G11B15/125 , G11B15/1875 , G11B15/4678 , H04N5/78266
摘要： A reproduction apparatus reproduces information signals recorded in a plurality of recording modes having different information sizes of an information signal to be recorded per unit time, discriminates the recording mode of the reproduced information signal, and controls tracking between a recording medium and head in accordance with the discrimination result.

3. 发明授权

US06185062B2 Tracking controller for a tape-like recording medium 失效
公开(公告)号：US06185062B2
公开(公告)日：2001-02-06
申请号：US09488445
申请日：2000-01-20
申请人： Hideki Nonoyama
发明人： Hideki Nonoyama
IPC分类号： A47B7300
CPC分类号： G11B27/3063 , G11B15/026 , G11B15/087 , G11B15/1875 , G11B15/4672 , G11B15/4675 , G11B15/4678 , G11B15/52 , G11B20/1207 , G11B27/3027 , G11B27/328 , G11B2220/90
摘要： A tracking control apparatus for a tape-shaped recording medium is operative, prior to carrying out actual reproduction, to measure times from the time point serving as the reference phase position within one period of the rotary drum to the time points when timing signals of respective recording areas of the tape-shaped recording medium are detected by the head, and to calculate average values every respective recording areas of the measured times to generate a reference value on the basis of the maximum value and the minimum value of the calculated average values of the respective recording areas. Further, in actual reproduction, times from the time point serving as reference phase position to the time points when the timing signals of the tape-shaped recording medium are detected by the head are measured to control relative velocity between traveling velocity of the tape-shaped recording medium and rotational velocity of the rotary drum on the basis of result of comparison between the measured times and the reference value. Thus, even in the case where particularly the relationship between the scanning locus of the reproduction head and the track shape is not ideal, satisfactory tracking can be carried out over the entire area of the track. As a result, reliability of, e.g., digital data storage using such tracking control apparatus for tape-shaped recording medium can be improved.

4. 发明授权

US6154336A Frame synchronizing circuit in a magnetic recording and reproducing apparatus and a frame synchronizing method thereof 失效
标题翻译：磁记录和再现装置中的帧同步电路及其帧同步方法
公开(公告)号：US6154336A
公开(公告)日：2000-11-28
申请号：US699780
申请日：1996-08-20
申请人： Toshiro Uemura , Masahiro Fujikawa
发明人： Toshiro Uemura , Masahiro Fujikawa
IPC分类号： G11B20/02 , G11B15/467 , G11B27/30 , G11B5/584
CPC分类号： G11B15/4672 , G11B15/4678 , G11B27/3027 , G11B27/3063
摘要： A reproducing signal read out by a reproducing head is transmitted to a demodulator including a track number detecting circuit through a reproducing amplifier. A microcomputer performs tracking control by controlling the rotation of a capstan based on the error information obtained by a tracking error detector. A reference frame pulse generating circuit 101 of the microcomputer performs frame synchronization by generating a reference frame pulse synchronized with the reference pulse of a drum generated by a drum reference generating part based on the predetermined track number (for example, the head value of the track numbers) of the track numbers of a reproducing frame detected by the track number detecting circuit.
摘要翻译：由再现头读出的再现信号通过再现放大器发送到包括轨道号检测电路的解调器。微型计算机通过基于由跟踪误差检测器获得的误差信息来控制绞盘的旋转来执行跟踪控制。微型计算机的参考帧脉冲发生电路101通过基于预定的轨道号（例如，磁道的磁头值）产生与鼓参考生成部分产生的磁鼓的基准脉冲同步的参考帧脉冲来执行帧同步数量）由轨道号检测电路检测的再现帧的轨道号。

5. 发明授权

US06134074A Reproducing apparatus having tracking control in accordance with track number information 失效
标题翻译：具有根据轨道号信息的跟踪控制的再生装置
公开(公告)号：US06134074A
公开(公告)日：2000-10-17
申请号：US827839
申请日：1997-04-11
申请人： Shuya Tanaka
发明人： Shuya Tanaka
IPC分类号： G06T9/00 , G11B5/584 , G11B15/087 , G11B15/18 , G11B15/20 , G11B15/46 , G11B15/467 , G11B15/52 , G11B21/08 , G11B27/30 , H03M7/30 , H04N5/7826 , H04N5/783 , H04N7/50 , H04N9/797
CPC分类号： G11B15/20 , G11B15/087 , G11B15/1816 , G11B15/463 , G11B15/4678 , G11B21/088 , G11B27/3027 , G11B5/584 , H04N19/40 , H04N19/51 , H04N19/61 , H04N5/78266 , G11B15/1875 , G11B15/52 , H04N5/783 , H04N9/7973
摘要： There is provided a reproducing apparatus arranged to reproduce an information signal from a recording medium on which a number of recording tracks are formed in parallel with each other and the information signal is recorded on the recording tracks together with track number information indicative of numbers of the respective tracks, a pilot signal component being multiplexed onto the information signal periodically at intervals of a predetermined number of tracks. When the information signal is to be reproduced from the recording medium, the reproducing apparatus executes tracking control of the reproducing head with respect to a target track, by using the pilot signal component contained in a signal reproduced by a reproducing head. The reproducing apparatus determines the target track according to the track number information separated from the signal reproduced by the reproducing head. According to the above-described arrangement, it is possible to execute correct tracking control quickly after the start of reproduction. In addition, since the track number information recorded on the recording medium in a multiplexed manner is effectively utilized, it is not necessary to provide a special circuit for determining the target track.
摘要翻译：提供了一种再现装置，被配置为从其中在其上形成多个记录磁道的记录介质再现信息信号，并且信息信号与指示数字的轨道号信息一起记录在记录磁道上相应的轨道，以预定数量的轨道的间隔周期性地复用到信息信号上的导频信号分量。当从记录介质再现信息信号时，再现装置通过使用包含在由再现头再现的信号中的导频信号分量来执行关于目标轨迹的再现头的跟踪控制。再现装置根据与由再现头再现的信号分离的轨道号信息来确定目标轨道。根据上述配置，可以在再现开始之后快速执行正确的跟踪控制。此外，由于有效地利用以复用方式记录在记录介质上的轨道号信息，所以不需要提供用于确定目标轨道的特殊电路。

6. 发明授权

US6028732A Tracking control device with error signal selection from plural error signals 失效
标题翻译：具有多个误差信号的误差信号选择的跟踪控制装置
公开(公告)号：US6028732A
公开(公告)日：2000-02-22
申请号：US512841
申请日：1995-08-09
申请人： Shuya Tanaka
发明人： Shuya Tanaka
IPC分类号： G11B5/588 , G11B15/467 , G11B21/10 , G11B5/584
CPC分类号： G11B15/4678 , G11B21/10
摘要： A tracking control device and method reduce the rate of occurrence of data error and improve the quality of reproduced images in a digital VTR. The tracking control device comprises a reproducing head for reproducing digital information from a recording medium, a forming circuit for forming a plurality of tracking error signals which respectively indicate positional deviations of the reproducing head from a plurality of areas into which each track formed on the recording medium is divided, a selecting circuit for selecting one tracking error signal from among the plurality of tracking error signals in accordance with their respective values, and a tracking control circuit for controlling a relative position between the reproducing head and the recording medium on the basis of the one tracking error signal selected by the selecting circuit.
摘要翻译：跟踪控制装置和方法降低了数字错误的发生率，提高了数字VTR中再现图像的质量。跟踪控制装置包括用于从记录介质再现数字信息的再现头，用于形成多个跟踪误差信号的形成电路，其分别指示在记录上形成的每个轨迹的多个区域中的再现头的位置偏差介质被分割，用于根据它们各自的值从多个跟踪误差信号中选择一个跟踪误差信号的选择电路和用于基于以下方式控制重放头和记录介质之间的相对位置的跟踪控制电路由选择电路选择的一个跟踪误差信号。

7. 发明授权

US6014284A Signal reproducing apparatus having rotary heads rotating 180.degree. out of phase and producing signals for tracking control 失效
标题翻译：信号再现装置，旋转头旋转180°异相并产生跟踪控制信号
公开(公告)号：US6014284A
公开(公告)日：2000-01-11
申请号：US562902
申请日：1995-11-27
申请人： Yukio Shimura , Nobutoshi Takayama
发明人： Yukio Shimura , Nobutoshi Takayama
IPC分类号： G11B5/588 , G11B15/467 , G11B20/12 , G11B21/10 , G11B5/584
CPC分类号： G11B15/4678 , G11B21/10 , G11B5/588
摘要： A signal reproducing apparatus is arranged to have two reproduced signals reproduced from a plurality of tracks formed on a magnetic medium by two rotary heads arranged to rotate 180 degrees out of phase with each other and which trace positions shifted from each other, to extract, from the two reproduced signals, two signals having respective different levels used for tracking control, and to perform tracking control by using the two extracted signals to cause the heads to trace positions shifted from a predetermined track. The arrangement enables the heads to stably trace track positions shifted from positions to be traced in the normal reproduction.
摘要翻译：信号再现装置被布置成具有从由磁介质上形成的多个轨迹再现的两个再现信号，两个旋转磁头被布置为彼此相位180度异相，并且哪个轨迹位置彼此偏移，以从两个再现信号，具有用于跟踪控制的各个不同级别的两个信号，并且通过使用两个提取的信号来执行跟踪控制，以使头部追踪从预定轨迹偏移的位置。该布置使得头能够稳定地追踪在正常再现中要跟踪的位置偏移的轨迹位置。

8. 发明授权

US5845042A Transmission recording and reproduction of digital data and time information in transport packets using a compression ratio 失效
公开(公告)号：US5845042A
公开(公告)日：1998-12-01
申请号：US862070
申请日：1997-05-22
申请人： Naofumi Yanagihara
发明人： Naofumi Yanagihara
IPC分类号： H04N19/149 , G11B5/008 , G11B15/12 , G11B15/18 , G11B15/467 , G11B15/473 , G11B20/12 , G11B27/00 , G11B27/30 , H04B14/04 , H04L12/28 , H04N5/7826 , H04N5/783 , H04N5/926 , H04N7/08 , H04N7/081 , H04N7/56 , H04N7/62 , H04N9/79 , H04N9/797 , H04N9/804 , H04N9/82 , H04N19/00 , H04N19/126 , H04N19/423 , H04N19/625 , H04N19/70 , H04N19/91 , H04N21/41 , H04N21/43 , H04N21/432 , H04N21/433 , H04N21/434 , H04N21/4402
CPC分类号： H04N21/4135 , G11B15/125 , G11B15/1875 , G11B15/4733 , G11B27/005 , G11B27/3027 , G11B27/3036 , G11B27/3063 , H04N21/4305 , H04N21/4325 , H04N21/4334 , H04N21/4344 , H04N21/4402 , H04N5/9262 , H04N5/9264 , H04N7/56 , H04N9/7921 , G11B15/4671 , G11B15/4678 , G11B2220/90 , G11B5/0086 , H04N5/78263 , H04N5/783 , H04N9/797 , H04N9/8042 , H04N9/8227
摘要： A data packet which contains time information is time compressed and the time information is extracted from the time compressed data packet. A system clock is synchronized with the extracted time information and is multiplied by a predetermined compression ratio to produce replacement time information which replaces the time information in the time compressed data packet. The time compressed data packet that now contains the replacement time information is modulated and transmitted or recorded.

9. 发明授权

US5802081A Digital information modulating apparatus 失效
标题翻译：数字信息调制装置
公开(公告)号：US5802081A
公开(公告)日：1998-09-01
申请号：US495071
申请日：1995-06-27
申请人： Takeo Ohishi
发明人： Takeo Ohishi
IPC分类号： H04N5/922 , G11B15/46 , G11B15/467 , G11B20/12 , G11B20/14 , G11B27/30 , H04L27/34 , H04N5/92 , G11B20/08
CPC分类号： G11B15/463 , G11B15/4678 , G11B20/1426 , G11B27/3027
摘要： Information is divided into first blocks each having m bits, and n bit or bits in each of S different states are added to a head of each of the first blocks to change the first block into S second blocks each having m+n bits, where m and n denote predetermined natural numbers and S denotes a predetermined natural number equal to or smaller than 2.sup.n. Each of the S second blocks is pre-coded into S pre-coded information blocks respectively. One of the S pre-coded information blocks is selected as a modulation-resultant information signal in response to error signals related to the S pre-coded information blocks respectively. The modulation-resultant information signal has q different notch frequencies. The S pre-coded information blocks are converted into S amplitude signals representing amplitude values respectively. A set of q first waveform signals and a set of q second waveform signals are generated. The q first waveform signals represent waveforms related to the q notch frequencies respectively. The q second waveform signals are different in phase from the q first waveform signals by 90.degree. respectively. Each of the S amplitude signals and the 2q waveform signals are multiplied into 2q multiplication-resultant signals. The 2q multiplication-resultant signals are added and accumulated into 2q addition-resultant signals respectively with respect to each of the S pre-coded information blocks. An error signal is generated in response to the 2q addition-resultant signals, and thereby the S error signals are generated which relate to the S pre-coded information blocks respectively.
摘要翻译：信息被分成具有m位的第一块，并且在S个不同状态中的每一个中的n位或比特被添加到每个第一块的头部，以将第一块改变为具有m + n位的S个第二块，其中 m和n表示预定的自然数，S表示等于或小于2n的预定自然数。每个S个第二块分别被预编码为S个预编码信息块。响应于与S个预编码信息块相关的错误信号，选择S个预编码信息块中的一个作为调制结果信息信号。调制结果信息信号具有不同的陷波频率。 S个预编码信息块被分别转换成表示振幅值的S个振幅信号。产生一组q个第一波形信号和一组q个第二波形信号。 q个第一波形信号分别表示与q个陷波频率相关的波形。 q个第二波形信号的相位与q个第一波形信号分别相差90°。 S幅度信号和2q波形信号中的每一个被乘以2q个乘积信号。相对于每个S个预编码信息块，分别将2q个乘积信号相加并累加到2q个相加信号中。响应于2q相加信号产生误差信号，从而分别产生与S个预编码信息块有关的S个误差信号。

10. 发明授权

US5754356A Tracking error detector with comparison of amplitude detected pilot signals leaking in from tracks adjacent to the target track 失效
标题翻译：跟踪误差检测器，与检测到的导频信号的幅度进行比较，导频信号从与目标轨道相邻的轨道泄漏
公开(公告)号：US5754356A
公开(公告)日：1998-05-19
申请号：US612816
申请日：1996-03-22
申请人： Kenichi Honjo , Toshihiko Maruoka , Haruo Isaka , Makoto Gotou , Kei Ichikawa , Kiyokazu Hashimoto , Masafumi Shimotashiro
发明人： Kenichi Honjo , Toshihiko Maruoka , Haruo Isaka , Makoto Gotou , Kei Ichikawa , Kiyokazu Hashimoto , Masafumi Shimotashiro
IPC分类号： G11B15/087 , G11B15/18 , G11B15/467 , G11B5/02 , G11B27/10
CPC分类号： G11B15/1875 , G11B15/4678
摘要： A magnetic recording and reproducing apparatus includes: a recorder for recording information signals so as to form tracks obliquely on a magnetic tape, and for recording pilot signals so that the frequency may differ between different modes such as SP and LP; a reproducing head for reproducing recorded information; an error detecting circuit for comparing the level difference of pilot signals recorded in both tracks adjacent to the track to be scanned by there producing head and for outputting a tracking error signal; and a controller for controlling the feed of the magnetic tape so that the tracking error signal may be balanced. Preferably, in the LP mode, a pilot signal of a higher frequency than that used in the SP mode is recorded. In a tracking error detector for a magnetic recording and reproducing apparatus for detecting the pilot signal, the reproduced signals are sampled at a frequency at a common multiple of each pilot frequency, a pilot signal is detected, and a tracking error signal is output.
摘要翻译：一种磁记录和再现装置，包括：用于记录信息信号以便在磁带上倾斜地形成轨道并用于记录导频信号的记录器，使得频率在诸如SP和LP的不同模式之间可能不同; 用于再现记录信息的再现头; 误差检测电路，用于比较由所述制造头在与要扫描的轨道相邻的两个轨道中记录的导频信号的电平差，并输出跟踪误差信号; 以及控制器，用于控制磁带的馈送，使得跟踪误差信号可以被平衡。优选地，在LP模式中，记录频率高于SP模式中使用的频率的导频信号。在用于检测导频信号的磁记录和再现装置的跟踪误差检测器中，以每个导频的公倍数的频率对再生信号进行采样，检测导频信号，并输出跟踪误差信号。

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