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    • 21. 发明授权
    • System for converting frequency band of picture signal
    • 用于转换图像信号频带的系统
    • US3941921A
    • 1976-03-02
    • US396440
    • 1973-09-12
    • Yasufumi YumdeTakashi Furuhata
    • Yasufumi YumdeTakashi Furuhata
    • H04N7/12H04N1/28
    • H04N7/122
    • A system for converting a broad-band picture signal into a narrow-band signal or converting a narrow-band picture signal into a broad-band signal comprising a first memory means which has a capacity of storing a picture signal corresponding to one frame and can record and reproduce a broad-band picture signal at the same speed as the transmitted speed, and a second memory means which has a capacity of storing a picture signal corresponding to one scanning line and is such that writing speed and reading speed can be freely varied. In broad-to-narrow conversion, a broad-band picture signal corresponding to one frame is stored in the first memory means and is read out repeatedly from the first memory means at a speed equal to the speed with which a picture signal is commonly transmitted, and individual line signals appearing from the first memory means are successively written in the second memory means at a suitable time interval and are read out from the second memory means at a low speed corresponding to the desired frequency band. In narrow-to-broad conversion, individual line signals of a broad-to-narrow converted picture signal are successively written in the second memory means at a low speed and are read out therefrom at a high speed to be written in the first memory means, and after the signal corresponding to one frame is written in the first memory means according to the order of the scanning lines, this signal is read out from the first memory means to provide a broad-band picture signal. A plurality of second memory means may be provided so as to improve the efficiency in respect of time of transfer of the signal from the first to the second memory means or from the second to the first memory means and to reduce the period of time occupied by the broad-to-narrow converted frame signal.
    • 一种用于将宽带图像信号转换成窄带信号或将窄带图像信号转换成宽带信号的系统,其包括具有存储对应于一帧的图像信号的能力的第一存储装置,并且可以 以与传输速度相同的速度记录和再现宽带图像信号;以及第二存储装置,其具有存储对应于一条扫描线的图像信号的能力,并且使得写入速度和读取速度可以自由变化 。 在宽到窄的转换中,对应于一帧的宽带图像信号被存储在第一存储装置中,并且以等于图像信号被共同传输的速度的速度从第一存储装置重复读出 ,并且从第一存储器装置出现的各个线路信号以合适的时间间隔连续地写入第二存储器装置,并以对应于期望频带的低速从第二存储装置中读出。 在窄到宽的转换中,宽到窄的转换的图像信号的各行信号以低速连续地写入第二存储装置,并从高速读出,以写入第一存储装置 并且在根据扫描线的顺序将对应于一帧的信号写入第一存储装置之后,从第一存储装置读出该信号以提供宽带图像信号。 可以提供多个第二存储器装置,以便提高从第一存储装置或第二存储装置传送信号的时间方面的效率,并且减少由第一存储装置传送到第二存储装置的时间 宽到窄的转换帧信号。
    • 23. 发明授权
    • Magnetic recording and reproducing apparatus of video signals
    • 视频信号的磁记录和再现装置
    • US5699471A
    • 1997-12-16
    • US192290
    • 1994-02-04
    • Takashi FuruhataManabu KatsukiHiroki Mizosoe
    • Takashi FuruhataManabu KatsukiHiroki Mizosoe
    • G11B5/008H04N5/7826H04N9/79H04N9/81
    • G11B5/00878H04N5/78266H04N9/7925H04N9/81
    • An apparatus for recording and reproducing a video signal records all of effective line information required for transmission of respective picture images and voice information together with identification information in mutually resembling track patterns by setting the number of sampled picture elements per line (or block) and the number of lines (or the number of blocks) to be recorded in each track in accordance with a band ratio m of a first record video signal to a second record video signal. With this, it is possible to record and reproduce a plural types of video signals having mutually different bands and also different number of effective scanning lines and signal formats by one apparatus efficiently while checking enlargement of a circuit scale and with almost uniform picture quality performance in accordance with the difference of the bands.
    • 用于记录和再现视频信号的装置通过设置每行(或块)的采样图像元素的数量,将相应图像和语音信息所需的有效行信息与识别信息一起记录在相似的轨迹图案中, 根据第一记录视频信号与第二记录视频信号的频带比m记录在每个磁道中的行数(或块数)。 由此,可以在检查电路规模的放大和几乎均匀的图像质量性能的同时,通过一个装置有效地记录和再现具有相互不同的频带和不同数量的有效扫描线和信号格式的多种类型的视频信号 根据乐队的差异。
    • 28. 发明授权
    • Frequency discrimination circuit
    • 频率鉴别电路
    • US4366399A
    • 1982-12-28
    • US221324
    • 1980-12-29
    • Takashi Furuhata
    • Takashi Furuhata
    • G05D13/62G01R23/15G11B15/467H02P23/00H02P29/00H03K9/06H03K5/19G11C27/02H03K6/00
    • G11B15/467G01R23/15H02P23/22Y10S388/901Y10S388/915
    • A frequency discrimination circuit suitable for use in a speed control device is disclosed which comprises a single retriggerable monostable multivibrator for discriminating a period of an input pulse signal corresponding to a speed from a predetermined period, a gate for inhibiting the output of the multivibrator at least for a sampling period, and a trapezoidal wave generator for generating a trapezoidal wave when the output of the gate is absent, and a sample-and-hold circuit for sampling the trapezoidal wave by a sampling pulse synchronized with the input pulse signal and for holding a sampled value to generate a frequency discrimination output on the output side of the circuit. The provision of the retriggerable monostable multivibrator reduces undesirable variations the circuit operation due to the change in the ambient temperature, and prevents the generation of a false lock-in point.
    • 公开了一种适用于速度控制装置的频率判别电路,其包括单个可再触发单稳态多谐振荡器,用于鉴别与预定周期相对应的速度的输入脉冲信号的周期,至少抑制多谐振荡器输出的门 以及用于在不存在栅极的输出时产生梯形波的梯形波发生器,以及采样保持电路,用于通过与输入脉冲信号同步的采样脉冲对梯形波进行采样,并用于保持 用于在电路的输出侧产生频率鉴别输出的采样值。 可再触发单稳态多谐振荡器的设置减少了由于环境温度变化引起的电路操作的不期望的变化,并且防止产生假锁定点。
    • 30. 发明授权
    • Display device for information signals
    • 信息信号显示装置
    • US5907364A
    • 1999-05-25
    • US669269
    • 1996-05-29
    • Takashi FuruhataSadao KubotaShutoku Watanabe
    • Takashi FuruhataSadao KubotaShutoku Watanabe
    • H04N5/46H04N5/12H04N7/01H04N7/015H04N13/00H04N11/22
    • H04N13/0029H04N13/0037H04N13/0048H04N13/0051H04N13/0438H04N13/047H04N13/0497H04N7/0105H04N7/012H04N7/0125H04N13/0055H04N13/0059H04N13/0422H04N19/597H04N5/126H04N7/0122
    • A display device for information signals which performs highly efficient image display of a standard television signal, a high definition television signal, a progressive scanning television signal or a stereoscopic television signal on the same screen has a first signal input unit applied with the standard television signal, a second signal input unit applied with the high definition television signal, progressive scanning television signal or stereoscopic television signal, a mode designation unit for designating a mode for display of one of the signals, a signal conversion unit including a write unit for writing the first signal, at a frequency thereof, to memories and a read unit for reading the memories at a frequency which is nearly twice that of the first signal, a signal switching unit, a signal processing unit and a deflection switching unit, whereby a first display signal from the signal conversion unit or a second display signal from the second input terminal is selected and image-displayed on the same display unit through a deflection system. Through this, the cost of the device can be reduced, the standard television signal having less scanning lines can be displayed with substantially the same number of scanning lines as that of the high definition television signal, various kinds of disturbances can be eliminated to improve the image quality and a stereoscopic image can also be displayed.
    • 在同一屏幕上执行标准电视信号,高分辨率电视信号,逐行扫描电视信号或立体电视信号的高效图像显示的信息信号显示装置具有应用标准电视信号的第一信号输入单元 ,应用了高清晰度电视信号的第二信号输入单元,逐行扫描电视信号或立体电视信号,用于指定用于显示其中一个信号的模式的模式指定单元,包括写入单元的信号转换单元, 第一信号,其频率为存储器和用于以几乎是第一信号的两倍的频率读取存储器的读取单元,信号切换单元,信号处理单元和偏转切换单元,由此第一显示器 选择来自信号转换单元的信号或来自第二输入端的第二显示信号 通过偏转系统在同一显示单元上显示图像。 通过这样,可以降低装置的成本,可以以与高分辨率电视信号基本相同数量的扫描线显示具有较少扫描线的标准电视信号,可以消除各种干扰以改善 也可以显示图像质量和立体图像。