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1. 发明专利

JP2004178770A Optical disk device 审中-公开
公开(公告)号：JP2004178770A
公开(公告)日：2004-06-24
申请号：JP2002347139
申请日：2002-11-29
申请人： Hitachi Ltd , Hitachi-Lg Data Storage Inc , 株式会社日立エルジーデータストレージ , 株式会社日立製作所
发明人： SAITO ATSUSHI , KATSUKI MANABU , AKABOSHI KENJI , IKEDA KAZUHIRO
IPC分类号： G11B20/10 , G11B7/005 , G11B20/14
摘要： PROBLEM TO BE SOLVED: To detect an address from a wobble signal having a small S/N ratio and amplitude variation highly precisely.
SOLUTION: The optical disk device locates a light spot on an optical disk which meanders at a fixed frequency and has a group whose addresses are locally modulated. The device is equipped with an optical head for irradiating the light spot onto the optical disk and detecting the wobble signal from a reflected light, an AD converter for converting the wobble signal into a digital value at a frequency at least twice as that of the wobble signal, a phase detectiing and computing unit for performing FIR calculation with the digital value, binarizing the FIR calculated signal, updating the binarized signal at 1/N-th frequency of the wobble signal and outputting it, and a decoding circuit for identifying an address from an output signal of the phase detection computing unit. Also, the FIR calculation of 4 tap is performed and a cut-off frequency as an FIR filter is lowered. Furthermore, the FIR calculation is performed with a part of coefficient made 0 and it is hardly affected by the digital value in which the amplitude variation occurs.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2005353133A Method of deriving appropriate sample-and-hold timing, and optical disk apparatus using this method 审中-公开
标题翻译：采用适当的样本和保持时序的方法和使用该方法的光盘装置
公开(公告)号：JP2005353133A
公开(公告)日：2005-12-22
申请号：JP2004170656
申请日：2004-06-09
申请人： Hitachi Ltd , Hitachi-Lg Data Storage Inc , 株式会社日立エルジーデータストレージ , 株式会社日立製作所
发明人： NISHIMURA KOICHIRO , IKEDA KAZUHIRO , KAKU TOSHIMITSU
IPC分类号： G11B7/0045 , G11B7/00 , G11B7/005 , G11B7/09 , G11B7/125
CPC分类号： G11B7/09 , G11B7/0053 , G11B7/1267
摘要： PROBLEM TO BE SOLVED: To solve such problem that in sample-and-hold operation performed during recording for controlling laser power and stabilizing servo operation, margin of sample-and-hold timing becomes small at high speed operation, but this is caused by that a operation delay time of each part cannot be neglected and variation of sample-hold timing by temperature variation and other main cause cannot be neglected. SOLUTION: This apparatus is provided with a sample-and-hold circuit of a detection signal of laser power and a servo signal, a monitoring means of the sample-and-hold circuit, a means varying sample-and-hold operation timing, and a means controlling sample-and-hold operation timing. In this control means, sample-and-hold timing is varied to a (+) direction or a (-) direction from estimation timing, referring to a monitoring result, optimum timing is obtained. Control is performed so that sample-and-hold operation timing is set to this optimum value. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题为了解决在用于控制激光功率的记录期间进行的采样保持操作和稳定伺服操作的问题，在高速操作中采样保持时间的裕度变小，但是这是由于每个部件的运行延迟时间不能被忽略，并且由于温度变化和其他主要原因而导致的采样保持定时的变化不能忽略。解决方案：该装置具有激光功率检测信号和伺服信号的采样和保持电路，采样保持电路的监视装置，变化采样保持操作的装置定时和控制采样和保持操作时序的手段。在该控制装置中，参考监视结果，采样保持定时从估计定时变化为（+）方向或（ - ）方向，获得最佳定时。执行控制使得采样保持操作定时被设置为该最佳值。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2008276843A Laser driving method and optical disk recording/reproducing device 审中-公开
标题翻译：激光驱动方法和光盘记录/再现装置
公开(公告)号：JP2008276843A
公开(公告)日：2008-11-13
申请号：JP2007117959
申请日：2007-04-27
申请人： Hitachi Ltd , Hitachi-Lg Data Storage Inc , 株式会社日立エルジーデータストレージ , 株式会社日立製作所
发明人： NAKAJIMA JUNJI , IKEDA KAZUHIRO , NAKAI NOBUO
IPC分类号： G11B7/125
CPC分类号： G11B7/1263
摘要： PROBLEM TO BE SOLVED: To provide a laser driving method capable of stably writing data in an optical disk, and to provide an optical disk recording/reproducing device. SOLUTION: The driving method for a laser driving circuit having a laser diode for applying a laser beam to an optical disk, a transistor connected in series to the laser diode, and a variable power source for applying a DC voltage to the laser diode comprises; a test emission step of causing the laser diode to test-emit light before the recording of data in the optical disk is started; a detection step of detecting an operation voltage of a connection point between the laser diode and the transistor; and a voltage adjusting step of adjusting the DC voltage of the variable power source based on the operation voltage. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够在光盘中稳定地写入数据并提供光盘记录/再现装置的激光驱动方法。解决方案：具有用于将激光束施加到光盘的激光二极管，与激光二极管串联连接的晶体管的激光器驱动电路的驱动方法和用于向激光器施加DC电压的可变电源二极管包括在开始记录光盘之前使激光二极管测试发光的测试发射步骤; 检测步骤，检测激光二极管和晶体管之间的连接点的工作电压; 以及电压调整步骤，根据所述工作电压来调整所述可变电源的直流电压。版权所有（C）2009，JPO＆INPIT

4. 发明专利

JP2003296930A Disk recording/reproducing apparatus and reproducing method 审中-公开
标题翻译：磁盘记录/再现装置和再现方法
公开(公告)号：JP2003296930A
公开(公告)日：2003-10-17
申请号：JP2002099522
申请日：2002-04-02
申请人： Hitachi Ltd , Hitachi-Lg Data Storage Inc , 株式会社日立エルジーデータストレージ , 株式会社日立製作所
发明人： AKABOSHI KENJI , SAITO ATSUSHI , IKEDA KAZUHIRO
IPC分类号： G11B20/14 , G11B7/004
摘要： PROBLEM TO BE SOLVED: To optimize PLL shifting detection performance in a wobble recording system, and to prevent disk destruction or the like caused by impossible data reproduction or the overwriting of recorded data in data recording.
SOLUTION: A parameter to be set by a user is provided with an error NG determination threshold setting means, a one-unit NG determination number setting means 119, a continuous OK unit number setting means 129, and an NG unit number setting means 127. By changing the value of the parameter, a sensitivity for outputting a PLL deviation detection interruption is set to an optimal sensitivity requested by the user, and PLL deviation detection performance is optimized in a wobble recording system.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：优化摆动记录系统中的PLL移位检测性能，并防止由于不可能的数据再现或数据记录中的记录数据的重写引起的盘损坏等。
解决方案：由用户设定的参数具有错误NG判定阈值设定单元，单位NG判定次数设定单元119，连续OK单元数设定单元129以及NG单元编号设定通过改变参数值，将PLL偏差检测中断的灵敏度设置为用户要求的最佳灵敏度，并且在摆动记录系统中优化PLL偏移检测性能。版权所有（C）2004，JPO

5. 发明专利

JPH06311405A IMAGE TRANSMISSION DEVICE 失效
公开(公告)号：JPH06311405A
公开(公告)日：1994-11-04
申请号：JP9909693
申请日：1993-04-26
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： IKEDA KAZUHIRO , KUSUDA KOJI , NEMOTO SAKAE
IPC分类号： G01C3/06 , G06T1/00 , G06T7/60 , H04N5/225 , H04N5/272 , G06F15/62 , G06F15/64 , G06F15/70
摘要： PURPOSE:To recognize the distance from a camera to an object by a trigonometry in a television telephone, to perform a background deletion by this method, to provide a mean can be performed by both of a transmission side and a reception side in the screen synthesis for the background deletion and to perform an emphasis display of a specified object image. CONSTITUTION:The distance of an object is recognized by two cameras, a shift 5 and a coincidence detection 6. The object image of an object arranged in a designated distance is extracted by a video switch 12 and the image is transmitted. Thus, a background deletion is performed. The contrast of the object image is raised and an emphasis display is performed. A screen and the distance information within the screen is transmitted and a screen synthesizing means operating by the distance information is provided on a reception side. Thus, the screen synthesis for the background deletion can be performed on the reception side.

6. 发明专利

JPH08125777A MULTI-ADDRESS MULTI-SPOT COMMUNICATION SYSTEM AND INFORMATION PROVIDING INTERNAL 失效
公开(公告)号：JPH08125777A
公开(公告)日：1996-05-17
申请号：JP26407694
申请日：1994-10-27
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： IKEDA KAZUHIRO , MASUKO ATSUSHI , DOI KIYOTAKA , ABE EIKO , MATSUNAGA TOSHIHIRO , TAKIZAWA MASAAKI
IPC分类号： H04N7/14 , H04L12/18 , H04M11/00
摘要： PURPOSE: To perform the encoding within a full-screen frame at a prescribed point of time by receiving a call setting signal, the authenticated signal of an information reception terminal or an information providing terminal control signal from a digital communication line network. CONSTITUTION: The call setting signals of all the information reception terminals, the authenticated signal of an information reception terminal or an information providing terminal control signal is received from a digital communication line network. The originating call signal of an IRTa 9 which calls at first enters an H 331 line network 8 and is transmitted as a call setting signal to an IPT 1 via the D channel 17 of a subscriber line 18. The IPT 1 starts by this originating call, an incoming call processing is performed for the signal in a network interface 16, the signal is encoded, the data multiplexed in a multiplexing part 6 is transmitted to the network 8 by using an in-band channel. The network 8 transmits the data 12 of a B channel to the IRTa 9. Next, when an IRTb 10 performs an originating call, the call setting signal is generated in the network 8, the signal is transmitted to the IPT by using a D channel and a distribution is performed by distributing the B channel of the IPT 1.

7. 发明专利

JPS61140280A Profile compensating circuit 失效
标题翻译：配置文件补偿电路
公开(公告)号：JPS61140280A
公开(公告)日：1986-06-27
申请号：JP26076784
申请日：1984-12-12
申请人： Hitachi Ltd , Hitachi Video Eng Co Ltd
发明人： KUBOTA SADAO , IKEDA KAZUHIRO , KURITA TOSHIYUKI
IPC分类号： H04N5/208
摘要： PURPOSE: To apply profile compensation to a titled profile as well as vertical profile compensation to fine patterns and a sharp angle portion by selecting a 1H delay time in a vertical profile compensation filter as 1H
+ τs (τs is a subcarrier half period time).
CONSTITUTION: A video brightness signal (signal (a) at a sampling point) inputted to an input terminal 1 is inputted to an adder circuit 4 and a 1H+τs delay line 2. The output signal of the line 2 is a signal (b), which is inputted to an adder circuit 5, a subtraction circuit 6 and a 1H+τs delay line 3, the output signal of which is a signal (c), it is inputted to an adder circuit 4. The adder circuit 4 outputs a signal of picture element signal (a) + picture element signal (c), the signal is inputted to the subtraction circuit 6, where the arithmetic of [2 × picture element signal (b) - picture element signal (a) - picture element signal (c) = output of subtraction circuit 6] is executed to extract a profile signal. The signal is inputted to an adder circuit 13. In this case, the quantity of profile compensation is adjusted by adjusting the profile signal by gain control.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过在垂直轮廓补偿滤波器中选择1H延迟时间作为1H taus（taus是子载波半周期时间），将轮廓补偿应用于标题轮廓以及垂直轮廓补偿，以精细图案和锐角部分）。构成：输入到输入端1的视频亮度信号（采样点的信号（a））输入到加法电路4和1H +延迟线2.线2的输出信号是信号（b ）输入到加法器电路5，减法电路6和1H + taus延迟线3，其输出信号是信号（c），它被输入到加法器电路4.加法器电路4输出像素信号（a）+图像元素信号（c）的信号，该信号被输入到减法电路6，其中[2×像素信号（b） - 像素信号（a） - 像素执行信号（c）=减法电路6的输出]以提取分布信号。信号被输入到加法器电路13.在这种情况下，通过增益控制来调整轮廓信号来调整轮廓补偿量。

8. 发明专利

JPH0622305A VIDEO COMMUNICATION CONTROL METHOD AND VIDEO COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH0622305A
公开(公告)日：1994-01-28
申请号：JP17405292
申请日：1992-07-01
申请人： HITACHI LTD , HITACHI VIDEO & INF SYST
发明人： TAKESUE JUNICHI , NEMOTO SAKAE , IKEDA KAZUHIRO , KUSUDA KOJI
IPC分类号： H04N7/14
摘要： PURPOSE:To enhance the use of convenience of a video telephone set by inhibiting an output of a video image of a called party automatically and displaying a video image of a caller on a monitor. CONSTITUTION:When a CPU of a communication controller 7 detects off-hook of a switch 6, a power application control circuit 10 supplies power to a camera 1 and a monitor 3 or the like, and call processing is implemented according to a telephone number from a key board 9. Then a CPU 8 of a video telephone set at a caller side starts inter-communication and an output of a video image of the caller is started. A CPU 8 of a video telephone set at a called party receives the video image and the caller is displayed on a monitor 3. In this case the CPU 8 of the video telephone set at the called party inhibits an output of the video image of the called party and no called party is displayed on the monitor 3 of the caller side. Then the called party enters the permission of the output of its own video image from a key board 9, then the CPU 8 of the video telephone set of the called party starts outputting the video image of the called party and then the inter-video image communication is started.

9. 发明专利

JPH04139991A DEGAUSSING CIRCUIT 失效
公开(公告)号：JPH04139991A
公开(公告)日：1992-05-13
申请号：JP26058990
申请日：1990-10-01
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： IKEDA KAZUHIRO , KASAHARA KAZUHIKO
IPC分类号： H04N9/29
摘要： PURPOSE:To reduce a rush current by deviating an operating timing of the degaussing circuit from a timing when a power switch is turned on. CONSTITUTION:With a relay 2 turned on as shown in relay 2 operation in figure 21, a load current 22 being the combination of a current flowing to a load circuit 14 and a charging current of a rectifier smoothing capacitor 11 flows to a terminal 15. Then after the load current 22 is made stable, a relay 3 is acted as shown in relay 3 operation in figure 23. Then a degaussing current 24 flows to a degauss coil 4. Since the load current 22 and the degaussing current 24 are timewise deviated at that time, an AC line current 25 flowing to a terminal 1 is a current having two low peaks. Thus, a rush current in the AC line current 25 is reduced.

10. 发明专利

JPH0481911A POWER SOURCE PROTECTING CIRCUIT 失效
公开(公告)号：JPH0481911A
公开(公告)日：1992-03-16
申请号：JP19496090
申请日：1990-07-25
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： IKEDA KAZUHIRO , MORI SHINJI
IPC分类号： H02H7/00 , G05F1/56
摘要： PURPOSE:To obtain the protective circuit which has sufficient safety and can be repaired easily by allowing the protective circuit to execute an operation for maintaining an operating state, as for a power source circuit whose stop is unnecessary even at the time of abnormality. CONSTITUTION:In the protective system by plural abnormality detecting circuits A5, B6 and C13 added to a system constituted of plural power source circuits A2, B8 and C11, the power source circuit stopped by each abnormality detecting circuit is limited to the power source circuit whose stop is necessary by its abnormal part. Accordingly, since the circuit which is operated even at the time of abnormality and has no problem is operated, the abnormal part can be limited. In such a manner, the repairing can be executed safely and quickly.

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