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1. 发明专利

CA1251558A METHOD OF MAGNETICALLY RECORDING VIDEO SIGNALS AND AN APPARATUS THEREFOR 未知
公开(公告)号：CA1251558A
公开(公告)日：1989-03-21
申请号：CA474955
申请日：1985-02-22
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： UMEMOTO MASUO , MITA SEIICHI , IZUMITA MORISHI , MICHIKAWA YUUICHI , ROKUDA MORITO , KATAYAMA HITOSHI , KANADA HIDEHIRO
IPC分类号： H03M7/14 , G11B5/09 , G11B20/14 , H04L25/49 , H04N5/91 , H04N5/92 , H04N9/804 , H04N5/782 , G11B20/10
摘要： : The present invention relates to an improved 8-8 mapping table system in digitally and magnetically recording video signals. Video signals coded into natural binary codes consisting of 8 bits are converted into different binary codes consisting of 8 bits constituted by patterns in which the directly repeated number of l's or O's does not exceed a predetermined number. In these codes, the directly repeated number of l's or O's is so limited that a maximum magnetization interval is reduced in magnetically recording the signals. Therefore, erroneous code is prevented from occurring in reproducing the signals.

2. 发明专利

DE3585964D1 未知
公开(公告)号：DE3585964D1
公开(公告)日：1992-06-11
申请号：DE3585964
申请日：1985-02-22
申请人： HITACHI LTD
发明人： UMEMOTO MASUO , MITA SEIICHI , IZUMITA MORISHI , MICHIKAWA YUUICHI , ROKUDA MORITO , KATAYAMA HITOSHI , KANADA HIDEHIRO
IPC分类号： H03M7/14 , G11B5/09 , G11B20/14 , H04L25/49 , H04N5/91 , H04N5/92 , H04N9/804 , H03M5/14 , G11B20/10
摘要： An improved 8-8 mapping table system in digitally and magnetically recording video signals. Video signals coded into natural binary codes consisting of 8 bits are converted into different binary codes consisting of 8 bits constituted by patterns in which a continuous number of the 1's or the 0's does not exceed a predetermined number. In these codes, the continuous number of the 1's or the 0's is so limited that a maximum magnetization interval is reduced in magnetically recording the signals. Therefore, erroneous code is prevented from occurring in reproducing the signals.

3. 发明专利

JPS60258761A PULSE REPRODUCTION CIRCUIT FOR DIGITAL MAGNETIC RECORDING 失效
公开(公告)号：JPS60258761A
公开(公告)日：1985-12-20
申请号：JP11300084
申请日：1984-06-04
申请人： HITACHI LTD , HERCULES INC
发明人： MICHIKAWA YUUICHI , MITA SEIICHI , UMEMOTO MASUO , SHIONO HIROSHI , ETOU YOSHIZUMI
IPC分类号： G11B20/10 , H04N5/91 , H04N5/92

4. 发明专利

JPH1132372A PORTABLE TELEPHONE DEVICE 失效
公开(公告)号：JPH1132372A
公开(公告)日：1999-02-02
申请号：JP18343597
申请日：1997-07-09
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： KUROSAWA KAZUHITO , MICHIKAWA YUUICHI , YAMAMOTO KOICHI , IMAKADO YOSHITAKA
IPC分类号： H04W68/00 , H04Q7/38 , H04Q7/14
摘要： PROBLEM TO BE SOLVED: To always accurately announce an incoming call, information accompanied with the incoming call, and the state of a portable telephone device to a user, by generating oscillation and operating other display according to the incoming call to the portable telephone device. SOLUTION: A receiving circuit 22 for announcing an incoming call of an incoming call announcing device 2 measures and demodulates the magnetic field intensity of a received radio wave. A control circuit 23 for announcing an incoming call judges transmitted information transmitted from a portable telephone device 1, operates a vibrator 25 and an LED display 26, and monitors the state of a push button switch 27. Also, a storage circuit 24 for announcing an incoming call stores identification information for individually identifying the incoming call announcing device 2 and the in-zone information or out-zone information of the portable telephone device 1. Then, not only the control information but also the other information is made different between the case of oscillating the incoming call announcing device and the case of turning on an LED or the like without oscillating the incoming call announcing device, that is, between the case of oscillating it as an announcing means and the case of not oscillating it as an announcing means.

5. 发明专利

JPS60154719A SYSTEM DISTRIBUTING CIRCUIT 失效
公开(公告)号：JPS60154719A
公开(公告)日：1985-08-14
申请号：JP1018384
申请日：1984-01-25
申请人： HITACHI LTD , HITACHI ELECTRONICS
发明人： MIYAZAKI SHINICHI , UMEMOTO MASUO , KANEDA HIDEHIRO , KATAYAMA HITOSHI , MICHIKAWA YUUICHI
IPC分类号： H03M9/00 , G11B20/10 , H04N5/91 , H04N5/92
摘要： PURPOSE:To attain miniaturization of the titled circuit and to improve the reliability by storing a digital signal once in a memory at the pre-stage of a shift register and adding a circuir replacing the sequence and reading n signals in the order of the system 1 to the system N in reading. CONSTITUTION:An input digital signal is stored once in a memory 6 having an address space of >=2X(NXn) based on a write address generated through the operation of a counter 7 by the sampling clock frequency. Then an output of the counter 7 is converted by an encoder 8 to generate a read address. Then the digital signal obtained at the shift register 9 having 4-tap output driven by the sampling clock frequency is inputted. Furthermore, data of each output tap is stored in a latch 11 by the clock frequency as the result of frequency division of the sampling clock frequency at a 1/4 frequency division circuit 10. The digital signal is distributed by this operation to attain desired distribution.

6. 发明专利

JPS59131281A Method for correcting time axis 失效
标题翻译：校正时间轴的方法
公开(公告)号：JPS59131281A
公开(公告)日：1984-07-28
申请号：JP564283
申请日：1983-01-17
申请人： Hitachi Denshi Ltd , Hitachi Ltd
发明人： UMEMOTO MASUO , MIYAZAKI SHINICHI , MICHIKAWA YUUICHI , KATAYAMA HITOSHI
IPC分类号： H04N5/91 , G11B20/02 , H04N5/95
CPC分类号： H04N5/95
摘要： PURPOSE:To attain ease of calculation of time axis fluctuation and to miniaturize a device by using a signal having a waveform where a part of amplitude of a reference signal is changed in proportion to time as a time axis reference signal inserted in a video signal at the recording side. CONSTITUTION:The leading edge of a synchronizing signal SYN included in the video signal is detected and a burst signal BST of sawtooth wave is inserted after a fixed time from this point of time. A point crossing a level of a prescribed value a0 in one period of the burst signal is detected by using three sampling values a1-a3. The difference between the sampling values and a prescribed value is checked sequentially and reset is applied when the difference is negative at the sampling value a3, and a time tx of zero cross point is obtained by using the two sampling values a1, a2 before the a3. The extent of time axis correction is obtained from the shift tx.
摘要翻译：目的：为了便于计算时间轴的变动，并且通过使用具有参考信号的振幅的一部分与时间成比例地变化的波形的信号作为插入到视频信号中的时间轴参考信号而使装置小型化录音方面。构成：检测包括在视频信号中的同步信号SYN的前沿，并且在从该时间点起固定的时间之后插入锯齿波的突发信号BST。通过使用三个采样值a1-a3来检测在突发信号的一个周期中与规定值a0的电平相交的点。顺序地检查采样值和规定值之间的差异，并且当采样值a3的差为负时应用复位，并且通过使用a3之前的两个采样值a1，a2获得零交叉点的时间tx 。从移位tx获得时间轴校正的程度。

7. 发明专利

JPH08107442A SILENT CALLING DEVICE FOR PORTABLE TELEPHONE 失效
公开(公告)号：JPH08107442A
公开(公告)日：1996-04-23
申请号：JP24103294
申请日：1994-10-05
申请人： HITACHI LTD
发明人： MICHIKAWA YUUICHI
IPC分类号： H04M1/00
摘要： PURPOSE: To provide a portable telephone set that vibrations are stopped and can be switched to calling by a sound when abnormal vibrations are generated during calling by the vibrations. CONSTITUTION: This device is provided with a vibration motor 5 as the source of silent calling, loudspeaker 4 sounding the calling, voltage controlled oscillator(VCO) 7 for modulating a transmitting voice, PLL circuit 6 for controlling this VCO, and microprocessor 1 for monitoring the PLL circuit and controlling the vibration motor and the loudspeaker. Thus, by switching the calling by the vibrations to the calling by the sound, the transmission frequency deviation and false signals are eliminated and communication faults can be eliminated.

8. 发明专利

JPH07283774A REMAINING BATTERY AMOUNT DISPALY DEVICE FOR PORTABLE TELEPHONE 失效
公开(公告)号：JPH07283774A
公开(公告)日：1995-10-27
申请号：JP6830594
申请日：1994-04-06
申请人： HITACHI LTD
发明人： MICHIKAWA YUUICHI
IPC分类号： G01R31/36 , H04B7/26
摘要： PURPOSE:To provide the convenient portable telephone by detecting the surround ing temperature by a temperature detecting device and reporting the more accurate available time while displaying the battery remaining amount according to this. CONSTITUTION:The voltage information of a battery 1 is divided by the resistance of a power supply voltage monitoring circuit 2 and is sent to an A/D converter of a microprocessor 5, then it is taken in. The temperature information is converted into the voltage by the temperature detecting circuit using a thermister and is sent to another A/D converter of the microprocessor 5, then it is taken in. The microprocessor 5 recognizes the battery state based on the two information and issues a command on the contents of the remaining amount display on the display device 4. The display device 4 performs the required display according to the command. Thus, the more accurate battery remaining amount can be displayed based on the discharge characteristic of the battery at the temperature by detecting the surrounding temperature and the proper time of exchanging the battery can be shown to the user.

9. 发明专利

JPH0614227A AUTOMATIC TURNING-ON AND TURNING-OFF CONTROLLER FOR LIGHT FOR VIDEO CAMERA 失效
公开(公告)号：JPH0614227A
公开(公告)日：1994-01-21
申请号：JP16960592
申请日：1992-06-26
申请人： HITACHI LTD
发明人： MICHIKAWA YUUICHI
IPC分类号： H04N5/225 , H04N5/232 , H04N5/238
摘要： PURPOSE:To improve an operation convenience by automatically turning-on or turning- off a light for photographing according to a situation by automatically turning-on or turning-off the light according to the illuminance of an object. CONSTITUTION:A light transmitted through a photographing lens system 1 is inputted through an iris 2 to an image pickup element 3. The output signal is transmitted through an AGC amplifier 4 and a signal processing circuit 5, and turned to a video signal S1. A microprocessor 8 outputs an iris control signal S4 to an iris driving circuit 6, and outputs an AGC control signal S3 to the AGC amplifier 4, based on a luminance level signal S2 outputted from the circuit 5 and a stop value information signal S5 from a stop value detecting circuit, so that a processing for an automatic exposure control can be attained. When an object illuminance is less than a prescribed illuminance, the iris 2 is fully opened, and the amplification factor of the amplifier 4 is increased. Moreover, when the illuminance is decreased, and less than the normal illuminance, the light 10 is turned on by a light control circuit 9 by a light control signal S6 from the processor 8. And also, when the illuminance is more than the normal illuminance, the light 10 is turned off by the circuit 9.

10. 发明专利

JPS59186404A Demodulating circuit 失效
标题翻译：解调电路
公开(公告)号：JPS59186404A
公开(公告)日：1984-10-23
申请号：JP6084083
申请日：1983-04-08
申请人： Hitachi Denshi Ltd , Hitachi Ltd
发明人： UMEMOTO MASUO , MICHIKAWA YUUICHI , TANAKA SEIJI
IPC分类号： H04N5/93 , H03D3/00 , H03D3/04
CPC分类号： H03D3/04
摘要： PURPOSE:To eliminate the influence of time errors in the rising and falling of a limiter output and to realize a demodulation system suitable for a carrier of high frequency by providing pulse generating circuit individually; for the rising and falling of the output of a limiter circuit and adjusting the phase of generated pulses. CONSTITUTION:An inverted output J and an uninverted output K are obtained from an input signal I. Buffer amplifiers 12 and 13 serve as a delay circuit and an inverting circuit and AND circuits 14 and 15 generate pulses N and O having constant pulse widths corresponding to the rising and falling of a modulated signal from input signals J and L, and K and M. Comparators 16 and 17 correct variances of rising and falling characteristics of the input signal I, characteristics of the AND circuits N and O, and characteristics between inverted and uninverted outputs of the buffer amplifiers 12 and 13; the comparator 16 is set to a fixed threshold level and the comparator 17 is set to a variable threshold level. The output of the comparators 16 and 17 are ORed by an OR circuit 18 to obtain a demodulated signal through an LPF19.
摘要翻译：目的：消除限幅器输出上升和下降时间误差的影响，并通过单独提供脉冲发生电路实现适用于高频载波的解调系统; 用于限制电路的输出的上升和下降，并调整产生的脉冲的相位。构成：从输入信号I获得反相输出J和未反相输出K.缓冲放大器12和13用作延迟电路和反相电路，AND电路14和15产生具有对应于来自输入信号J和L以及K和M的调制信号的上升和下降。比较器16和17校正输入信号I的上升和下降特性的变化，AND电路N和O的特性，以及反相和缓冲放大器12和13的未反相输出; 将比较器16设定为固定的阈值电平，将比较器17设定为可变阈值电平。比较器16和17的输出由或电路18进行或运算，以通过LPF19获得解调信号。

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