Method of helical scan magnetic tape recording
    2.
    发明授权
    Method of helical scan magnetic tape recording 失效
    螺旋扫描磁带记录方法

    公开(公告)号:US5644675A

    公开(公告)日:1997-07-01

    申请号:US410417

    申请日:1995-03-27

    摘要: A time coding system of high resolution for a digital audio and video recording system is disclosed. Various methods of structuring: time code for recording are disclosed which enable time code reading at high tape transport speeds to facilitate automatic search/forward and reverse. A time and control code generator for video recording and replay use comprises a pulse generator generating a pulse having a television frame frequency repetition rate. A source of a time code signal is related to the television frame frequency, and comprises data bits representing hours minutes seconds and frames. A pulse position modulation means is coupled to the pulse and in response to the data its representing hours minutes seconds, modulates a trailing edge of the pulse to a first position responsive to the data bits having a logical 1 value and modulates the trailing edge to a second position responsive to the data bits having a logical 0 value. A generating is means coupled to the data bits representing frames and generates a first signal frequency responsive to the frame data bits having a logical 0 value and a second signal frequency responsive to the frame data bits having a logical 1 value. The second frequency is double the first frequency. The first and second frequencies are added symmetrically to the trailing edge to maintain the modulated positions.

    摘要翻译: 公开了一种用于数字音频和视频记录系统的高分辨率的时间编码系统。 各种结构方法:公开了用于记录的时间码,其使得能够以高磁带传输速度读取时间码,以便于自动搜索/正向和反向。 用于视频记录和重放使用的时间和控制代码发生器包括产生具有电视帧频率重复率的脉冲的脉冲发生器。 时间码信号的来源与电视帧频有关,并且包括表示小时分钟秒和帧的数据比特。 脉冲位置调制装置被耦合到脉冲并且响应于其表示小时分钟秒的数据,响应于具有逻辑1值的数据位将脉冲的后沿调制到第一位置,并将后沿调制为 响应于具有逻辑0值的数据位的第二位置。 生成是耦合到表示帧的数据位的装置,并响应于具有逻辑0值的帧数据位和响应于具有逻辑1值的帧数据位产生第二信号频率而生成第一信号频率。 第二个频率是第一个频率的两倍。 第一和第二频率对称地添加到后缘以保持调制位置。

    Method for determining the position in a cassette recorder
    3.
    发明授权
    Method for determining the position in a cassette recorder 失效
    用于确定盒式录像机中的位置的方法

    公开(公告)号:US5471124A

    公开(公告)日:1995-11-28

    申请号:US240752

    申请日:1994-06-23

    摘要: The determination of the position of a tape thread-in and thread-out mechanism in a cassette recorder is carried out using contact paths together with a slider contact that form position switches. Output signals of the position switches are coupled via a resistor network that combines the output signals and produces an output signal on a single conductor. The resistor network output signal is coupled to an input of an analog -to-digital converter. To improve the reliability of determining the position of the mechanism without requiring the use of highly accurate resistors in the resistor network, the voltage value assigned to each individual position is measured at the output of the network during a calibration operation. The voltage values are stored in a memory and used as the desired values during normal operation.

    摘要翻译: PCT No.PCT / EP92 / 02671 Sec。 371日期1994年6月23日 102(e)日期1994年6月23日PCT 1991年11月20日PCT公布。 公开号WO93 / 11534 日期:1993年6月10日。使用接触路径与形成位置开关的滑块接触来进行磁带录入机中磁带进线和断线机构的位置的确定。 位置开关的输出信号通过组合输出信号的电阻网络耦合,并在单个导体上产生输出信号。 电阻网络输出信号耦合到模拟 - 数字转换器的输入端。 为了提高确定机构位置的可靠性,而不需要在电阻网络中使用高度精确的电阻,在校准操作期间,在网络的输出处测量分配给每个单独位置的电压值。 电压值存储在存储器中,并在正常操作期间用作所需的值。

    Combined longitudinal and transversal tracking
    4.
    发明授权
    Combined longitudinal and transversal tracking 失效
    组合纵向和横向跟踪

    公开(公告)号:US6122134A

    公开(公告)日:2000-09-19

    申请号:US990761

    申请日:1997-12-15

    IPC分类号: G11B20/12 G11B21/10 G11B5/584

    CPC分类号: G11B21/10

    摘要: An information storage medium has at least a longitudinal bundle comprising three servo tracks (3, 4, 5). The bundle is arranged in consecutive tracking units (T(N)) of a determined longitudinal length. Surfaces of said servo tracks present either a first or a second characteristic (6, 7) and vary in size and distribution inside the tracking units. The bundles may contain longitudinally stored identification information. Methods for obtaining tracking signals indicating a transversal offset between a reading head and the bundle and for retrieving identification information are disclosed. Also methods for obtaining tracking units in which transversal tracking code is combined with distinct information are described.

    摘要翻译: 信息存储介质至少具有包括三个伺服轨道(3,4,5)的纵向束。 捆束以确定的纵向长度的连续跟踪单元(T(N))排列。 所述伺服磁道的表面呈现第一或第二特征(6,7),并且跟踪单元内的尺寸和分布变化。 捆可以包含纵向存储的标识信息。 公开了用于获得指示读取头和束之间的横向偏移并用于检索识别信息的跟踪信号的方法。 还描述了用于获得横向跟踪代码与不同信息组合的跟踪单元的方法。

    Circuit for analog digital conversion of a color television signal
employing variable signal amplification
    5.
    发明授权
    Circuit for analog digital conversion of a color television signal employing variable signal amplification 失效
    采用可变信号放大的彩色电视信号的模拟数字转换电路

    公开(公告)号:US4628345A

    公开(公告)日:1986-12-09

    申请号:US651272

    申请日:1984-09-14

    CPC分类号: H04N11/08

    摘要: An analog digital conversion is provided for two color difference signals, for example for a recording according to a timeplex method. The color difference signals are adjusted in their amplitude at the input of the analog digital converter such that the modulation range of the analog digital converter is always fully used independent of the original amplitude of the color difference signal. The amplitude is restored back to its original value after a digital to analog reconversion. This results in an improvement of the signal to noise ratio during the transmission. The amplification provided to the various signals can be controlled by comparator circuits comparing the signal level with a reference signal.

    摘要翻译: 为两个色差信号提供模拟数字转换,例如根据时间表方法的记录。 色差信号在模拟数字转换器的输入处的振幅被调整,使得模拟数字转换器的调制范围总是完全用于独立于色差信号的原始幅度。 在数字到模拟重新转换后,幅度恢复到原来的值。 这导致传输期间信噪比的改善。 提供给各种信号的放大可以由将信号电平与参考信号进行比较的比较器电路来控制。

    Reproduction or recording apparatus for different optical recording media
    6.
    发明申请
    Reproduction or recording apparatus for different optical recording media 失效
    用于不同光记录介质的再现或记录装置

    公开(公告)号:US20050007810A1

    公开(公告)日:2005-01-13

    申请号:US10498443

    申请日:2002-11-27

    申请人: Jurgen Kaaden

    发明人: Jurgen Kaaden

    摘要: The invention relates to a reproduction or recording apparatus for different optical recording media, which differ for example with regard to their storage density, are scanned by different means and have a photodetector arrangement that is jointly used for the different recording media and scanning means, which arrangement provides a photodetector signal which is independent of the absolute light power level of the laser diodes. For generating the photodetector signal which is independent of the absolute light power level of the laser diodes, a switch for changing over the sensitivity of the photodetector is provided, which switch is controlled by the modulator for generating a uniform light power with a laser diode. A connecting line to the basic apparatus and corresponding terminals for controlling the switch are advantageously obviated as a result. The application of the invention is envisaged for reproduction or recording apparatuses of different optical recording media in which a modulation of the laser current is provided for generating a uniform light power.

    摘要翻译: 本发明涉及用于不同光记录介质的再现或记录装置,其例如关于其存储密度不同,通过不同的装置进行扫描,并且具有共同用于不同记录介质和扫描装置的光电检测器装置, 布置提供了与激光二极管的绝对光功率水平无关的光电检测器信号。 为了产生与激光二极管的绝对光功率水平无关的光电检测器信号,提供了用于改变光电检测器的灵敏度的开关,该开关由用于利用激光二极管产生均匀光功率的调制器控制。 结果,有利地消除了与基本装置的连接线和用于控制开关的相应端子。 本发明的应用设想用于提供用于产生均匀光功率的激光电流调制的不同光记录介质的再现或记录装置。

    Method for the control of track following in a recorder
    7.
    发明授权
    Method for the control of track following in a recorder 失效
    记录仪中追踪跟踪的方法

    公开(公告)号:US6078449A

    公开(公告)日:2000-06-20

    申请号:US848119

    申请日:1997-04-28

    IPC分类号: G11B15/467 G11B5/09 G11B15/46

    CPC分类号: G11B15/463

    摘要: A method of controlling track following in a recorder which uses recording in oblique tracks of a magnetic tape without inactive areas between the tracks and wherein data gaps occur in the useful data sequence due to the change of tracks includes the step of filling the time period containing the data gaps with a predetermined sequence of cyclical modifications of code words representing amplitude and degree increments of a symmetrical train of oscillations. A sequence of code words is used to produce incremental portions of the train of symmetrical oscillations whereby a number of incremental portions forms a complete train of symmetrical oscillations. The code words are modified in synchronism with the clock rate at which the useful data of the recorder are clocked.

    摘要翻译: 一种在记录器中控制跟踪的方法,其使用磁道的倾斜轨迹中的记录,而在轨道之间没有无效区域,并且其中由于轨道变化而在有用数据序列中出现的数据间隙包括填充包含 数据间隙具有表示对称振荡系列的振幅和程度增量的代码字的预定的循环修改序列。 一系列代码字用于产生对称振荡列的增量部分,由此多个增量部分形成完整的对称振荡列。 代码字与记录器的有用数据被计时的时钟速率同步地修改。

    Track-readjusted magnetic-tape recorder with transverse tracking
    8.
    发明授权
    Track-readjusted magnetic-tape recorder with transverse tracking 失效
    跟踪重新调整的磁带录音机,具有横向跟踪功能

    公开(公告)号:US4876614A

    公开(公告)日:1989-10-24

    申请号:US259434

    申请日:1988-10-14

    CPC分类号: G11B5/588

    摘要: A track readjustment arrangement for a video magnetic tape recorder in which at least two magnetic heads travel across the direction of motion of the magnetic tape, for the purpose of scanning signals that are recorded on the tape. The magnetic heads are carried on a rotatable head wheel, and they have air gaps with an azimuth angle that alternates mirror-inverted around the central axis of the wheel. The phase errors that may occur in the signals scanned by the magnetic heads are from the horizontal sync pulses. The magnetic heads provide individually control parameters that are derived from the magnitude and direction of the phase errors. The head wheel is axially varied and reset as a function of the control parameters.

    摘要翻译: 一种视频磁带录像机的轨迹重新调整装置,其中至少两个磁头在磁带的运动方向上移动,以便扫描记录在磁带上的信号。 磁头被承载在可旋转的头轮上,并且它们具有空气间隙,其方位角围绕车轮的中心轴线反向倒置。 由磁头扫描的信号中可能发生的相位误差来自水平同步脉冲。 磁头提供从相位误差的大小和方向导出的单独的控制参数。 头轮是轴向变化的,并根据控制参数复位。

    Magnetic tape video recorder with a one head drum
    9.
    发明授权
    Magnetic tape video recorder with a one head drum 失效
    磁带录像机,带一个磁头鼓

    公开(公告)号:US4642707A

    公开(公告)日:1987-02-10

    申请号:US582075

    申请日:1984-02-21

    摘要: A magnetic tape recorder for video recording and video playback with a one head drum and a head support plate. According to the invention the head support plate is point supported and spring attached to a base plate. The head support plate is movable around two rotation axes and is actuated with an electromagnetic drive means. The one motion cooperates with a dynamic track following circuit for providing dynamic height level correction of the head and allows to capture tracks during replay, which deviate from the parallel inclined position or, in case of a course of the track deviating from the tape recording speed resulting in a trick palyback. The motion around the other axis allows a controlled and regulated azimuth offset of the neighboring tracks during playback, which are recorded with continuously alternating azimuth angle.

    摘要翻译: 一种磁带录像机,用于使用一个磁头鼓和头部支撑板进行视频录制和视频播放。 根据本发明,头支撑板是点支撑的,并且弹簧附接到基板。 头部支撑板可绕两个旋转轴线移动,并用电磁驱动装置致动。 一个动作与动态跟踪电路配合,用于提供磁头的动态高度电平校正,并且允许在重放期间捕获轨迹,该轨迹偏离平行倾斜位置,或者在轨道偏离磁带记录速度的情况下 导致了一个诡计。 围绕另一轴的运动允许在重放期间相邻轨道的受控和调节的方位偏移,其以连续交替的方位角记录。

    Multitrack tape device using a movable magnetic head with a planar
surface and including a tape supporting device
    10.
    发明授权
    Multitrack tape device using a movable magnetic head with a planar surface and including a tape supporting device 失效
    使用具有平坦表面并包括带支撑装置的可移动磁头的多轨磁带装置

    公开(公告)号:US5978188A

    公开(公告)日:1999-11-02

    申请号:US11763

    申请日:1998-03-30

    摘要: A tape recorder and/or a playback device for a multitrack tape utilizes a magnetic head having active parts for recording and/or reading microtracks with the active parts being arranged in a two-dimensional matrix within a substantially planar surface of the magnetic head. A pressure device assures contact between the microtracks and the active parts by acting on a backside surface of the tape opposite to the front side surface containing the magnetic head. A structure allows for positioning the magnetic head in front of either one of at least two macrotracks which bundle addressed microtracks. A portion of the tape surface is supported adjacent to the macrotrack bundling the addressed microtracks to prevent unwanted tape deformation.

    摘要翻译: PCT No.PCT / EP97 / 03285 371日期1998年3月30日 102(e)1998年3月30日PCT 1997年6月23日PCT公布。 公开号WO98 / 00838 日期1998年1月8日一种用于多轨磁带的磁带录音机和/或播放装置利用具有有源部分的磁头,用于记录和/或读取微轨迹,活动部件被布置在二维矩阵的基本平坦的表面内 磁头。 压力装置通过作用在与包含磁头的前侧表面相对的带的背面上来确保微轨道和有源部分之间的接触。 结构允许将磁头定位在捆绑寻址的微轨道的至少两个宏轨道中的任一个的前面。 磁带表面的一部分被支撑在与所寻址的微轨道捆绑的宏轨道附近以防止不期望的磁带变形。