Video tape recording/reproducing apparatus having an auto tracking
function
    1.
    发明授权
    Video tape recording/reproducing apparatus having an auto tracking function 失效
    具有自动跟踪功能的录像带录放装置

    公开(公告)号:US4489352A

    公开(公告)日:1984-12-18

    申请号:US367976

    申请日:1982-04-13

    CPC分类号: G11B27/005 G11B5/592

    摘要: A video signal recording/reproducing apparatus includes a first set of rotary heads mounted on a rotary disk and a second set of rotary heads mounted on head actuators which are also mounted on the rotary disk. The apparatus has two reproduction modes. A magnetic tape in the first reproduction mode is driven at a speed equal to the speed used in a recording mode. The magnetic tape in the second reproduction mode is driven at a speed which is different from the speed used in the recording mode. The apparatus has a negative feedback loop which detects the reproduced signal level of the second set of rotary heads and drives the head actuators in order to increase the reproduced signal level of the second set of rotary heads. In the first reproduction mode, the negative feedback loop is intermittently closed. At the period of time when the negative feedback loop is open, the negative feedback loop holds the value of its output signal to that of the last time period when the negative feedback loop was closed, and, in addition, the head actuator is not driven when the feedback loop is open. At a transitional period when the apparatus switches from the first reproduction mode to the second reproduction mode, a holding signal from the negative feedback loop is supplied to the head actuator.

    摘要翻译: 视频信号记录/再现装置包括安装在旋转盘上的第一组旋转磁头和安装在头部致动器上的第二组旋转磁头,磁头驱动器也安装在转盘上。 该装置具有两种再现模式。 以与记录模式下使用的速度相等的速度驱动第一再现模式中的磁带。 以与记录模式下使用的速度不同的速度驱动第二再现模式中的磁带。 该装置具有负反馈回路,其检测第二组旋转磁头的重放信号电平并驱动磁头致动器,以增加第二组旋转磁头的重放信号电平。 在第一再现模式中,负反馈回路间歇地闭合。 在负反馈回路打开的时间段,负反馈回路将其输出信号的值保持为负反馈回路闭合的最后一个时间段的值,此外,头驱动器不被驱动 当反馈回路打开时。 在设备从第一再现模式切换到第二再现模式的过渡期间,来自负反馈回路的保持信号被提供给磁头致动器。

    Frequency demodulation circuit
    2.
    发明授权
    Frequency demodulation circuit 失效
    频率解调电路

    公开(公告)号:US4994928A

    公开(公告)日:1991-02-19

    申请号:US189169

    申请日:1988-05-02

    IPC分类号: H03D3/00

    CPC分类号: H03D3/00

    摘要: A frequency demodulation circuit superposes pulses on an input frequency-modulated (FM) signal at substantially the peaks of the FM signal before demodulating the FM signal so that zero cross points of the FM signal can be correctly restored. A peak detection circuit detects peaks of the FM signal or peaks of the fundamental wave of the FM signal, which substantially correspond to the peaks of the FM signal. A pulse generating circuit generates, from the peak detection result, pulses respectively occurring at the same timings as those of the detected peak occurrance timings. The generated pulses are added to the FM signal to obtain the pulse-superposed FM signal.

    Magnetic reproducing apparatus
    3.
    发明授权
    Magnetic reproducing apparatus 失效
    磁再现装置

    公开(公告)号:US4623940A

    公开(公告)日:1986-11-18

    申请号:US525567

    申请日:1983-08-22

    摘要: A magnetic reproducing apparatus which has a pair of main rotatable heads having different azimuth angles and a pair of auxiliary rotatable heads having different azimuth angles. When a magnetic tape is played back while it runs at a speed different from that at which it runs during a recording mode, playback output signals from the main and auxiliary rotatable heads are switched over to replace a reduction in the outputs from the main rotatable heads with the outputs from the auxiliary rotatable heads to produce a combined playback output signal. The combined playback output signal is passed through a variable delay line having a delay time varied by an output from a detector circuit which detects variations in horizontal synchronous signal intervals of the combined playback output signal. This varied delay time of the variable delay line can eliminate any skew distortions which would appear on a displayed image on the screen due to the variations in horizontal synchronous signal intervals of the combined playback output signal.

    摘要翻译: 具有一对具有不同方位角的主旋转头和具有不同方位角的一对辅助旋转头的磁再现装置。 当磁带在与记录模式期间运行的速度不同的速度下播放时,来自主旋转磁头和辅助旋转磁头的重放输出信号被切换以替代来自主旋转磁头的输出的减小 与来自辅助可旋转头的输出产生组合的重放输出信号。 组合的重放输出信号通过可变延迟线,该可变延迟线具有由检测器电路的输出变化的延迟时间,该检测器电路检测组合的重放输出信号的水平同步信号间隔的变化。 可变延迟线的这种变化的延迟时间可以消除由于组合的重放输出信号的水平同步信号间隔的变化而在屏幕上显示的图像上出现的任何偏斜失真。

    Control of auto-tracking in tracking-error correcting system of video
recording/reproducing apparatus
    4.
    发明授权
    Control of auto-tracking in tracking-error correcting system of video recording/reproducing apparatus 失效
    视频记录/再现装置的跟踪误差校正系统中的自动跟踪控制

    公开(公告)号:US4590523A

    公开(公告)日:1986-05-20

    申请号:US439712

    申请日:1982-11-04

    IPC分类号: G11B5/592 G11B21/10 H04N5/78

    CPC分类号: G11B21/103 G11B5/592

    摘要: A tracking-error correcting system in a rotary head magnetic recording and reproducing apparatus in which reproducing magnetic heads are mounted on a respective bimorph leaf having piezoelectric elements so as to be movable in the direction of the axis of rotation. The piezoelectric elements are controlled by a control voltage which is produced by adding a signal from an auto-tracking circuit and a signal from a triangular wave generating circuit. In a reproducing mode at a tape speed which is different from a tape speed in recording mode, this system activates the auto-tracking circuit when the control voltage level is within a limited range which is detected by a control voltage detector. Also, this system stops the auto-tracking circuit during a transition period when the reproduction mode changes.

    摘要翻译: 一种旋转磁头磁记录和再现装置中的跟踪误差校正系统,其中再现磁头安装在具有压电元件的相应的双压电晶片叶片上,以便能够在旋转轴线的方向上移动。 压电元件由通过添加来自自动跟踪电路的信号和来自三角波产生电路的信号产生的控制电压来控制。 在以与记录模式下的磁带速度不同的磁带速度的再现模式下,当控制电压电平处于由控制电压检测器检测到的限制范围内时,该系统激活自动跟踪电路。 此外,该系统在再现模式改变的过渡期间停止自动跟踪电路。

    Phase locked loop circuit with quickly recoverable stability
    5.
    发明授权
    Phase locked loop circuit with quickly recoverable stability 失效
    锁相环电路具有快速恢复的稳定性

    公开(公告)号:US4812783A

    公开(公告)日:1989-03-14

    申请号:US88218

    申请日:1987-08-24

    CPC分类号: H04N5/126 H03L7/199 H04N5/956

    摘要: A PLL circuit for a phase comparator, a low-pass filter (LPF), a voltage-controlled oscillator (VCO) and a frequency divider. A first control circuit is responsive to a discontinuous phase change of a reference signal of the PLL circuit for inhibiting the operation of the phase comparator or disconnecting the LPF from the phase comparator during a predetermined period so that the discontinuous phase change information is not transmitted through the LPF to the VCO. At the same time, a second control circuit resets the frequency divider by a pulse of the reference signal after the discontinuous phase change or applies a voltage corresponding to the discontinuous phase change to the VCO so that the output signal of the frequency divider is locked in phase to the reference signal after the discontinuous phase change. With the cooperation of the first and second control circuits, the PLL circuit quickly recovers its stable state after the discontinuous phase change of the reference signal.

    摘要翻译: 用于相位比较器的PLL电路,低通滤波器(LPF),压控振荡器(VCO)和分频器。 第一控制电路响应于PLL电路的参考信号的不连续相位变化,用于在预定时段期间禁止相位比较器的操作或者从相位比较器断开LPF,使得不连续相位变化信息不通过 LPF到VCO。 同时,第二控制电路在不连续相变之后通过参考信号的脉冲复位分频器,或将与不连续相位相对应的电压施加到VCO,使得分频器的输出信号被锁定 在不连续相变之后与参考信号相位。 通过第一和第二控制电路的协调,PLL电路在参考信号的不连续相变之后快速恢复其稳定状态。

    Encoding apparatus, control method for encoding apparatus and program
    6.
    发明授权
    Encoding apparatus, control method for encoding apparatus and program 有权
    编码装置,编码装置和程序的控制方法

    公开(公告)号:US08923391B2

    公开(公告)日:2014-12-30

    申请号:US13070305

    申请日:2011-03-23

    申请人: Masaaki Kobayashi

    发明人: Masaaki Kobayashi

    摘要: A control method for an encoding apparatus which performs bit rate control includes an acquiring step of acquiring a first quantization parameter as a quantization parameter to be used for quantizing a rate control unit, a first calculating step of calculating an evaluation value from a preset rate and a rate of an actually encoded rate control unit, a first setting step of, if the evaluation value is within a predetermined range, setting the first quantization parameter acquired by the acquiring step as a quantization parameter to be used for quantizing a rate control unit, and a second setting step of, if the evaluation value is not within the predetermined range, setting a second quantization parameter on the basis of the calculated evaluation value as a quantization parameter to be used for quantizing a rate control unit.

    摘要翻译: 一种执行比特率控制的编码装置的控制方法,包括获取步骤,取得第一量化参数作为用于量化速率控制单元的量化参数,第一计算步骤,从预设速率计算评估值;以及 实际编码速率控制单元的速率,第一设置步骤,如果评估值在预定范围内,则将通过获取步骤获取的第一量化参数设置为用于量化速率控制单元的量化参数, 以及第二设定步骤,如果所述评估值不在所述预定范围内,则基于所计算的评估值将第二量化参数设置为用于量化速率控制单元的量化参数。

    Content shooting apparatus
    7.
    发明授权
    Content shooting apparatus 有权
    内容拍摄设备

    公开(公告)号:US08643745B2

    公开(公告)日:2014-02-04

    申请号:US12521865

    申请日:2008-03-11

    IPC分类号: H04N5/76 H04N5/225

    摘要: A content shooting apparatus is provided which is suitable for generating a digest meeting the user's desire.A scene information generation portion detects a characteristic scene with reference to a parameter contained in either video/audio in content recorded during shooting operation information for the shooting apparatus, and generates scene information, an auxiliary information assignment portion assigns the scene information its type, priority, start time, end time, or representative time as auxiliary information in accordance with a prescribed rule, a listing portion makes a list of the scene information and the auxiliary information thereof, and a scene sorting-out portion sorts out scenes from the content with reference to the priority, such that the number of scenes is within a predetermined range.

    摘要翻译: 提供一种内容拍摄装置,其适于产生满足用户愿望的摘要。 场景信息生成部,参照拍摄装置的拍摄操作信息中记录的内容中包含的视频/音频中包含的参数来检测特征场景,生成场景信息,辅助信息分配部将场景信息分类为优先级 ,开始时间,结束时间或代表时间作为根据规定规则的辅助信息,列表部分列出场景信息及其辅助信息,并且场景分拣部分从内容中排除场景, 参考优先权,使得场景的数量在预定范围内。

    METHOD OF PRODUCING FRICTION MATERIAL
    9.
    发明申请
    METHOD OF PRODUCING FRICTION MATERIAL 有权
    制造摩擦材料的方法

    公开(公告)号:US20130256938A1

    公开(公告)日:2013-10-03

    申请号:US13991873

    申请日:2011-11-24

    IPC分类号: F16D69/02

    摘要: Provided is a method of producing a friction material that can prevent occurrence of dust generation and segregation at the time of mixing raw materials of the friction material and that is resistant to deterioration of the friction material even when a phenol resin is employed as a binder and that also allows the production process to be effected safely and speedily and at a low cost. The method includes a mixing step (A) for stirring the raw materials for the friction material containing a high-ortho phenol resin, slaked lime and 3-10 wt. % of water and a forming step (B) for forming a mixture powder obtained from the mixing step (A) to a desired shape at room temperature.

    摘要翻译: 提供一种制造摩擦材料的方法,其可以防止在混合摩擦材料的原料时发生粉尘的产生和偏析,并且即使当使用酚醛树脂作为粘合剂时也能抵抗摩擦材料的劣化, 这也使得生产过程能够以低成本安全,快速地实现。 该方法包括:混合步骤(A),用于搅拌含有高邻苯酚树脂,熟石灰和3-10重量份的摩擦材料的原料。 的水和用于在室温下将由混合步骤(A)获得的混合物粉末形成所需形状的成型步骤(B)。