公开(公告)号：US6018611A

公开(公告)日：2000-01-25

申请号：US495025

申请日：1995-06-27

申请人： Hiroaki Nogami ,  Hironobu Katayama

发明人： Hiroaki Nogami ,  Hironobu Katayama

IPC分类号： H04N5/7826 ,  G11B5/09 ,  G11B15/18 ,  G11B15/52 ,  G11B20/12 ,  G11B27/00 ,  G11B27/036 ,  G11B27/30 ,  H04N5/783 ,  H04N5/92 ,  H04N9/804 ,  H04N9/82 ,  H04N5/93 ,  H04N5/91

CPC分类号： G11B27/036 ,  G11B15/1875 ,  G11B20/1208 ,  G11B27/005 ,  G11B27/3027 ,  G11B5/09 ,  H04N9/8042 ,  G11B15/52 ,  G11B2220/90 ,  G11B27/3063 ,  H04N5/78266 ,  H04N5/783 ,  H04N9/8227

摘要： A digital recording and reproducing apparatus records two kinds of digital signals of an identical video program, generated by high-efficiency coding, or a relatively high bit-rate signal and a relatively low bit-rate signal, onto approximately the same positions on the tape. When the low bit-rate signal is commonly used for normal playback and search-playback or when it is used only for the search-playback, the amount of the search-playback data is adjusted so that data on a number of frames to be a unit for edit work may be recorded onto an integer number of tracks.

摘要翻译： 数字记录和再现装置将通过高效编码产生的相同视频节目的两种数字信号或相对较高的比特率信号和相对低的比特率信号记录在磁带上的大致相同的位置上 。 当低比特率信号通常用于正常播放和搜索重放时，或者当它仅用于搜索重放时，调整搜索重放数据的量，使得将多个帧的数据变为 用于编辑工作的单位可以被记录在整数个轨道上。

公开(公告)号：US5692092A

公开(公告)日：1997-11-25

申请号：US557498

申请日：1995-11-14

申请人： Hiroaki Nogami ,  Hironobu Katayama ,  Koichi Kawaguchi ,  Kenichi Shiraishi ,  Kazuya Aoki ,  Saori Akimoto

发明人： Hiroaki Nogami ,  Hironobu Katayama ,  Koichi Kawaguchi ,  Kenichi Shiraishi ,  Kazuya Aoki ,  Saori Akimoto

IPC分类号： H04N5/783 ,  G11B20/10 ,  H04N5/7826 ,  H04N5/92 ,  H04N5/93 ,  H04N9/804 ,  H04N9/82 ,  H04N9/79 ,  H04N5/91 ,  H04N5/917 ,  H04N11/02

CPC分类号： H04N9/8042 ,  H04N5/78266 ,  H04N5/783 ,  H04N9/8227

摘要： A digital VTR which is able to record a band-compressed signal having a bit-rate of 17 to 60 Mbps of a program while creating a low-bit-rate signal (1.5 to 5 Mbps) having the same program content as well as utilizing the low-bit-rate signal as a signal for the special playback. Variable speed playback data for a certain speed, which is recorded in the limited recording areas for variable-speed playback mode, is adapted to be used for playback at another speed in the variable-speed playback mode. The data structure of variable-speed playback data is adapted to change depending on the image areas on the image frame. Either of these embodiments or the combination of them, improves the quality of a reproduced picture during variable-speed playback mode in which a less amount of data is available than that of data read out at the time of a normal playback mode.

摘要翻译： 一种数字VTR，其能够在创建具有相同节目内容的低比特率信号（1.5至5Mbps）的同时，记录节目的比特率为17至60Mbps的频带压缩信号，并且利用 低比特率信号作为特殊播放的信号。 记录在用于可变速度重放模式的限制记录区域中的一定速度的可变速度重放数据适于在可变速度重放模式中以另一速度进行回放。 可变速重放数据的数据结构适于根据图像帧上的图像区域而改变。 这些实施例中的任何一个或它们的组合在与正常播放模式下读出的数据相比可用数据量较少的可变速度重放模式期间提高再现图像的质量。

公开(公告)号：US6097877A

公开(公告)日：2000-08-01

申请号：US444731

申请日：1995-05-19

申请人： Hironobu Katayama ,  Hiroaki Nogami ,  Kenichi Shiraishi

发明人： Hironobu Katayama ,  Hiroaki Nogami ,  Kenichi Shiraishi

IPC分类号： H04N5/783 ,  G11B5/008 ,  H04N5/92 ,  H04N7/52 ,  H04N9/804 ,  H04N19/00 ,  H04N19/423 ,  H04N19/46 ,  H04N19/503 ,  H04N19/577 ,  H04N19/587 ,  H04N19/59 ,  H04N19/61 ,  H04N19/625 ,  H04N19/65 ,  H04N19/66 ,  H04N19/70 ,  H04N19/85 ,  H04N19/89 ,  H04N19/895 ,  H04N19/91 ,  H04N5/91 ,  H04N5/917 ,  H04N7/26

CPC分类号： H04N21/236 ,  H04N21/434 ,  H04N9/8047 ,  G11B5/0086 ,  G11B5/00878 ,  H04N5/783

摘要： A digitally recording and reproducing apparatus simultaneously records two kinds of digital signals of an identical video program, generated by high-efficiency coding, or a relatively high bit-rate signal and a relatively low bit-rate signal, onto the approximately the same positions on the tape. The apparatus is constructed so that the low bit-rate signal is commonly used for normal playback and search-playback. Further, the recording time can be lengthened by reducing the recording bit-rate.

摘要翻译： 数字记录和再现装置同时将通过高效编码产生的相同视频节目的两种数字信号或相对较高的比特率信号和相对低的比特率信号记录在大致相同的位置上 磁带。 该装置被构造成使得低比特率信号通常用于正常播放和搜索重放。 此外，可以通过降低记录比特率来延长记录时间。

公开(公告)号：US4809118A

公开(公告)日：1989-02-28

申请号：US854693

申请日：1986-04-22

申请人： Shozo Nakagawa ,  Katsuya Yokoyama ,  Hironobu Katayama

发明人： Shozo Nakagawa ,  Katsuya Yokoyama ,  Hironobu Katayama

IPC分类号： G11B5/008 ,  G11B5/09 ,  G11B5/53 ,  G11B15/14 ,  G11B20/18 ,  H04N5/7826 ,  H04N5/783 ,  H04N5/926 ,  H04N9/89 ,  H04N5/78

CPC分类号： H04N5/9268 ,  G11B15/14 ,  G11B20/1813 ,  G11B5/534 ,  H04N5/7826 ,  H04N5/783 ,  H04N9/89

摘要： In a helical-scan magnetic record/playback system, n magnetic heads (where n is an integer greater than one) are disposed close to the outer wall of a head drum, spaced from one another by 2.pi./n radians with respect to the rotational axis of the head drum and also spaced from one another by approximately 1/n of the width of a magnetic tape in the axial direction of the head drum. The magnetic tape is wound around the head drum over an angle of 2.pi./n radians or more with respect to the rotational axis of the drum. With the rotation of the head drum, a video signal is time-sequentially divided for recording on n tracks of the tape and for reproduction therefrom. The invention results in reduced friction between the tape and the drum, thereby providing smooth travel and easy loading of the tape. According to this invention, a still or slow-motion picture can be reproduced without an external memory and the reciprocal travel of the tape.

摘要翻译： 在螺旋扫描磁记录/重放系统中，n个磁头（其中n是大于1的整数）设置在磁头鼓的外壁附近，相对于磁头鼓彼此间隔开2像素/ n弧度 磁头鼓的旋转轴线，并且彼此间隔开大约磁头在磁头鼓的轴向上的宽度的1 / n。 磁带以相对于滚筒的旋转轴线为2pi / n弧度或更大的角度缠绕在磁头鼓上。 随着磁头鼓的旋转，视频信号被时间顺序地划分，用于在磁带的n个磁迹上记录并再现。 本发明导致带和滚筒之间的摩擦减小，从而提供平滑的行进和容易的带状装载。 根据本发明，可以在没有外部存储器和磁带的往复行进的情况下再现静止或慢动作图像。

公开(公告)号：US06336001B1

公开(公告)日：2002-01-01

申请号：US09083108

申请日：1998-05-22

申请人： Takeshi Kawamura ,  Hironobu Katayama

发明人： Takeshi Kawamura ,  Hironobu Katayama

IPC分类号： H04N595

CPC分类号： G11B20/10037 ,  G11B20/10009 ,  G11B20/10296 ,  G11B20/1403

摘要： A digital recording/reproduction method and apparatus includes a data detection circuit for detecting a frequency of occurrence of a specific data value contained in an information signal, and a phase controller for controlling a phase of a sampling clock based on the frequency of occurrence of the specific data value detected by the data detection circuit. A threshold value in the data detection circuit is adjusted to maximize the frequency of occurrence of the specific data value contained in the information signal, and the phase of the sampling clock is controlled to minimize the amount of change in the frequency of occurrence of the specific data value contained in the information signal.

摘要翻译： 数字记录/再现方法和装置包括：数据检测电路，用于检测包含在信息信号中的特定数据值的发生频率;以及相位控制器，用于基于发生频率来控制采样时钟的相位 由数据检测电路检测的特定数据值。 调整数据检测电路中的阈值以最大化包含在信息信号中的特定数据值的发生频率，并且控制采样时钟的相位，以将具体的发生频率的变化量最小化 包含在信息信号中的数据值。

公开(公告)号：US5036412A

公开(公告)日：1991-07-30

申请号：US308820

申请日：1989-02-10

申请人： Kenichi Shiraishi ,  Takamasa Uejima ,  Hironobu Katayama

发明人： Kenichi Shiraishi ,  Takamasa Uejima ,  Hironobu Katayama

IPC分类号： G11B15/61 ,  G11B15/665

CPC分类号： G11B15/61 ,  G11B15/6656

摘要： A magnetic recording and reproducing apparatus which includes a set of loading members for drawing out a magnetic tape accommodated in a tape cassette and wound around a set of reels disposed to contact the same plane. The tape storing portions of the tape cassette are directed along part of the outer peripheral surface of a rotary head cylinder in an approximately M-shape, and a single inclining member is provided in the vicinity of one tape storing portion for causing a tape travelling reference face of the magnetic tape drawn out from the tape storing portion to be inclined. The first loading member corresponding to the tape storing portion is rotatably supported at right angles with respect to the tape travelling reference face of the magnetic tape inclined by the inclining member, while the other loading member corresponding to the other tape storing portion is rotatably supported at right angles with respect to the tape travelling reference face of the magnetic tape drawn out from the other tape storing portion.

公开(公告)号：US6160673A

公开(公告)日：2000-12-12

申请号：US14936

申请日：1998-01-28

申请人： Naoji Izumi ,  Hironobu Katayama

发明人： Naoji Izumi ,  Hironobu Katayama

IPC分类号： G11B5/09 ,  G11B20/10

CPC分类号： G11B20/10009

摘要： The waveform equalizer comprises equalizing means for equalizing the waveform of the reproduction signal based on the equalizing coefficient, reference signal-generating means for extracting an isolated wave from the reproduction signal to generate a reference signal based on the isolated wave and equalizing coefficient control means for carrying out an operation of the equalizing error of the isolated wave of the reproduction signal whose waveform has been equalized by the equalizing means from the reference signal, to control the equalizing coefficient based on the equalizing error, wherein the reference signal is generated based on the reproduction signal, and the equalizing coefficient is determined in response to the reproduction signal using this reference signal.

摘要翻译： 波形均衡器包括均衡装置，用于基于均衡系数对再现信号的波形进行均衡;参考信号发生装置，用于从再现信号中提取隔离波，以产生基于隔离波的参考信号;以及均衡系数控制装置， 执行其波形已经被均衡装置从参考信号均衡的再现信号的隔离波的均衡误差的操作，以基于均衡误差来控制均衡系数，其中基于 再现信号，并且根据使用该参考信号的再现信号来确定均衡系数。

公开(公告)号：US4234898A

公开(公告)日：1980-11-18

申请号：US19592

申请日：1979-03-12

申请人： Shozo Nakagawa ,  Katsuya Yokoyama ,  Hironobu Katayama

发明人： Shozo Nakagawa ,  Katsuya Yokoyama ,  Hironobu Katayama

IPC分类号： G11B20/10 ,  G11B5/09

CPC分类号： G11B20/10

摘要： In a digital magnetic recording and reproducing apparatus, a digital code signal to be recorded is given a code conversion by means of modulo-2-adding another digital signal thereto to prevent a continuation of the same binary signal levels for a prolonged period. The signal level of the reproduced digital code signal is corrected by level comparison with a threshold level provided by applying the above reproduced digital code signal to a compensator and peak rectifiers, which have the same time-constant, and then the reproduced digital code signal is given another code conversion by means of modulo-2-adding still another digital signal provided for restoring the code conversion, so that it is possible to reproduce the original digital code signal faithfully.

摘要翻译： 在数字磁记录和重放装置中，通过对其加上另一个数字信号的模2加上待记录的数字码信号，以防止长时间持续相同的二进制信号电平。 通过与通过将上述再现的数字码信号应用于具有相同时间常数的补偿器和峰值整流器提供的阈值电平的电平比较来校正再现的数字码信号的信号电平，然后再现的数字码信号为 给予另一个代码转换，通过模2加入提供用于恢复代码转换的另一个数字信号，使得可以忠实地再现原始数字代码信号。

公开(公告)号：US4004205A

公开(公告)日：1977-01-18

申请号：US422486

申请日：1973-12-06

申请人： Makoto Yamamoto ,  Hironobu Katayama

发明人： Makoto Yamamoto ,  Hironobu Katayama

IPC分类号： G11B15/467 ,  G11B15/52 ,  G11B15/54 ,  H02P23/00 ,  G05B1/02 ,  G05B21/02

CPC分类号： G11B15/467 ,  G11B15/52 ,  G11B15/54 ,  H02P23/186 ,  Y10S388/902

摘要： A hybrid servo control system for controlling, for example a rotation of a capstan driving motor or a head motor of a video tape recorder comprises at least an integral control loop including an analog phase comparator for detecting in an analog mode a phase difference between a signal related to the rotation of the capstan driving motor or the head motor to be controlled and a reference signal so as to produce an analog amount corresponding to said phase difference, an analog-digital converter for converting said analog amount into a digital amount and a digital frequency modulator for frequency modulating in a digital mode clock pulses with said digital amount.

摘要翻译： 用于控制例如磁带驱动电动机或磁带录像机的磁头马达的旋转的混合伺服控制系统至少包括一个积分控制回路，其包括模拟相位比较器，用于在模拟模式下检测信号之间的相位差 与要控制的主导轴驱动电动机或头电动机的旋转相关，以及参考信号，以产生与所述相位差相对应的模拟量;模数转换器，用于将所述模拟量转换成数字量，数字量 频率调制器，用于以具有所述数字量的数字模式时钟脉冲进行频率调制。