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71. 发明专利

JPH0832945A VIDEO TELEPHONE SYSTEM 失效
公开(公告)号：JPH0832945A
公开(公告)日：1996-02-02
申请号：JP16654194
申请日：1994-07-19
申请人： HITACHI LTD
发明人： KUDO YOSHIMICHI , OKAMOTO SADAJI
IPC分类号： H04N7/14
摘要： PURPOSE:To perform room monitoring besides protecting security and privacy by collating inquiry information supplied from a caller with communication destination information registered on memory when an incoming call is received and applying such control to open a covering means only when coincidence is obtained between them. CONSTITUTION:When the incoming call from an opponent is received, it is confirmed whether or not its own call number coincides with a subaddress stored in the subaddress storage area 17a of the memory 17. When coincidence is obtained, it is judged whether a call is the one by image communication, and when a judged result shows yes, a communication state in a mode of image communication is started, and also, a camera cover is opened. In such a way, the monitoring of a room can be performed. When the subaddress differs from the one stored in the memory 17 when the incoming call is received, a state is returned to a standby state when a hand-set 11 is not raised. When the handset 11 is raised, the camera cover 12 is opened and the mode of image communication is started when an opposite number coincides with the number registered on the memory 17.

72. 发明专利

JPH05323944A IMAGE PRODUCING DEVICE AND IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH05323944A
公开(公告)日：1993-12-07
申请号：JP12346192
申请日：1992-05-15
申请人： HITACHI LTD
发明人： KUDO YOSHIMICHI , KOMATSU SHIGERU
IPC分类号： G09G5/00 , G09G5/36 , G09G5/391 , H04N3/223 , H04N5/46 , H04N5/92 , H04N5/93 , H04N5/937 , H04N7/01 , H04N7/08 , H04N7/081
摘要： PURPOSE:To display an undistorted image on the image display device at a correct pixel without any troublesome adjustment when image data having a value different from an original pixel aspect ratio are reproduced by the image reproducing device. CONSTITUTION:A CPU 1 separates pixel aspect ratio information added to image data read out of a disk 5 and sends it to a synchronizing signal processing circuit 15 through a display control I/F 12. The synchronizing signal processing circuit 15 uses the synchronizing signal generated by the synchronizing signal generating circuit 11 to generate the driving signal for a CRT 14 and also uses the sent pixel aspect ratio information to control the amplitude of a deflecting voltage, thereby adjusting the horizontal and vertical image display sizes of the image display device 200.

73. 发明专利

JPH03204686A PICTURE INFORMATION DISPLAY DEVICE 失效
公开(公告)号：JPH03204686A
公开(公告)日：1991-09-06
申请号：JP56790
申请日：1990-01-08
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： KUDO YOSHIMICHI , KOMATSU SHIGERU , KAWADA KEIJI
IPC分类号： G09G1/16 , G09G5/00
摘要： PURPOSE:To carry out an agreeable presentation by receiving a picture and displaying the whole of the picture, with a first display device and only a main picture out of the pictures by means of a second display device. CONSTITUTION:Only picture information used for the presentation is displayed on a large-sized display 13, and a menu, a message, a cursor, etc., are displayed on only a monitor 14 for a presenter, so that an audience pays attention on the contents of a screen without being disturbed by the menu, etc. While, the presenter can advance the presentation while always confirming the whole of the picture information displayed on the large-sized display 13, on the monitor 14, and an operational menu and the message are displayed on the monitor 14. Thus, a comfortable presentation is carried out.

74. 发明专利

JPS63308489A VIDEO DISK PLAYER 失效
公开(公告)号：JPS63308489A
公开(公告)日：1988-12-15
申请号：JP14316887
申请日：1987-06-10
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： KUDO YOSHIMICHI , OKU MASUO , KIMURA TAKASHI
IPC分类号： H04N5/953 , G11B20/02 , H04N5/95
摘要： PURPOSE:To execute the special reproduction of a stable CLV disk without receiving the influence of a residual phase error by controlling a gain switching means so as to have a low loop gain at the time of the special reproduction of the CLV disk. CONSTITUTION:In the disk (CLV disk) in which a video signal is recorded on the disk so as to have a constant linear velocity, a variable gain circuit 13 is constituted of an arithmetic amplifier 20, resistances R1, R2, R3, capacitors C1, C2, ad and a switch S and controls a gain so as to lower the gain of the circuit at the time of the execution of the special reproduction and raise it at the time except it. At the time of executing the special reproduction of still, slow or the like in the CLV disk by the use of a digital picture memory, the generation of the bending of a screen caused by a phase synchronizing step-out or decolorizion is eliminated and the influence of the fluctuation of the characteristic of individual video disk players is not received.

75. 发明专利

JPS63287278A SIGNAL PROCESSING CIRCUIT FOR VIDEO DISK PLAYER 失效
公开(公告)号：JPS63287278A
公开(公告)日：1988-11-24
申请号：JP12137287
申请日：1987-05-20
申请人： HITACHI LTD
发明人： KUDO YOSHIMICHI , OKU MASUO , FUJII YUKIO
IPC分类号： H04N5/937 , H04N5/93 , H04N5/94
摘要： PURPOSE:To realize functions as a noise reduction circuit, a fixed delay element and a variable delay element by means of a field memory used in common by using the field memory as the noise reduction circuit (NR), as the fixed delay element at dropout compensation and the variable delay element at the CLV special reproduction. CONSTITUTION:The field memory 17 acts like a 262H delay circuit at the normal reproduction to constitute a noise reduction circuit (NR) utilizing the field correlation. A reproduced video signal is replaced into a video signal read from the memory 17 when a dropout takes place in the reproducing signal to apply dropout compensation. On the other hand, write is applied to the field memory synchronously with a discontinuous video signal subject to time axis correction while being read from a disk of the special reproduction of a CLV disk and the readout is applied in matching with the timing of a synchronizing signal whose phase is continuous generated by a synchronizing generator 23 to allow the field memory to make the discontinuous video signal continuous.

76. 发明专利

JPS63100641A MAGNETO-OPTICAL RECORDING DEVICE 失效
公开(公告)号：JPS63100641A
公开(公告)日：1988-05-02
申请号：JP24535086
申请日：1986-10-17
申请人： HITACHI LTD
发明人： FURUYA JUN , MIURA YOSHIO , KUDO YOSHIMICHI , FUKUSHIMA AKIO
IPC分类号： G11B5/02 , G11B11/10 , G11B11/105
摘要： PURPOSE:To equalize a magnetizing pattern in a recording bit and to prevent an erroneous recording by making an external magnetic field at the time of recording and erasing into a rectangular wave shape and making it into the alternating magnetic field of a constant optimum strength. CONSTITUTION:At a magnetic field generating circuit 22, an LC resonance circuit 36b composed of a coil 35b and a capacitor Cb having a resonance frequency at an odd number-fold high frequency to a basic frequency obtained an LC resonance circuit 36a composed of a coil 35a and a capacitor Ca is newly provided. The alternating magnetic fields generated respectively are inputted and synthesized to a driving circuit 21 composed of phase inverting circuits 32a and 32b and amplifiers 33a-33d, a rectangular shape alternating magnetic field is obtained and it is used for an external magnetic field for recording and erasing.

77. 发明专利

JPS6356082A PREPRODUCING DEVICE FOR CLV VIDEO DISK 失效
公开(公告)号：JPS6356082A
公开(公告)日：1988-03-10
申请号：JP19887886
申请日：1986-08-27
申请人： HITACHI LTD , HITACHI VIDEO ENG
发明人： OKU MASUO , KUDO YOSHIMICHI , IKEDA TETSUYA , NAKAJIMA AKIO , KIMURA TAKASHI
IPC分类号： G11B20/02 , H04N5/76 , H04N5/93 , H04N5/937
摘要： PURPOSE:To enable a special reproducing at an optional speed by making the synchronisms of video signals outputted by using a field memory continuous and moreover making the interval of track jump timings and the number of the track jumps variable. CONSTITUTION:A write controller 4 executes a write in a field memory 2 synchronizing to a reproduced vertical synchronizing signal VD and a read controller 5 executes a read action based on continuous synchronizing signals from a reference synchronism generating unit 6. Therefore the synchronizing discontinuity of the video signals, which occurs at the time of the track jump, is removed in the field memory 2. A decoder 10 receives commands such as two fold speed and three fold speed or forward direction/ reverse direction, etc. from a terminal F and also receives a time code showing the passed time of a program from the terminal G and the number of jump tracks is controlled by a control signal CONT.B.

78. 发明专利

JPS6354077A VIDEO DISK PLAYER 失效
公开(公告)号：JPS6354077A
公开(公告)日：1988-03-08
申请号：JP19711286
申请日：1986-08-25
申请人： HITACHI LTD
发明人： KUDO YOSHIMICHI , OKU MASUO , MATSUMOTO SHUZO , KONDO KAZUO , TSUKASAKI HISANOBU
IPC分类号： G11B7/085 , G11B19/24 , G11B19/28 , H04N5/76
摘要： PURPOSE:To give reproduction functions such as slow or double speed to a video disk player by matching the phase of a reference horizontal synchronizing signal just after track jump with a phase of a reproduced horizontal synchronizing signal just after jump to lock the phase synchronizingly while keeping the number of revolutions of a motor constant. CONSTITUTION:A signal read by an optical head 2 is demodulated by an FM demodulation circuit 4 and a reproduced video signal is fed to a TBC 5 as a time base fluctuation correction circuit. After the jitter correction by the TBC 5, the signal is outputted as it is in case of normal reproduction. In case of the special speed reproduction of the disk 1, the signal is stored once in a picture memory 8, and switched by a switch 10 to eliminate the effect of the synchronization attended with the track jump and the discontinuity of chrominance subcarrier. Further, a color burst is extracted by a burst gate 6, the phase is compared (14) with the reference value from the reference oscillator 15, the phase of the reference horizontal synchronizing signal separated by a reference synchronizing signal generating circuit 16 is compared (18) with the recovered horizontal synchronizing signal subjected to synchronizing separation 7, the result is added (13) to control motor drive 12.

79. 发明专利

JPS61194677A AUDIO SIGNAL PROCESSING CIRCUIT FOR OPTICAL INFORMATION RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS61194677A
公开(公告)日：1986-08-29
申请号：JP3260885
申请日：1985-02-22
申请人： HITACHI LTD
发明人： SAITO ISAO , OKU MASUO , KUDO YOSHIMICHI
IPC分类号： G11B7/00 , G11B7/004 , G11B20/10
摘要： PURPOSE:To eliminate a shift between playback audio signal at a join by digital processing and to improve sound quality by coupling an FM demodulator and an A/D converter together in terms of DC and shifting the DC level of a demodulated signal on the path between them. CONSTITUTION:An RF signal read out of a disk during reproduction is passed through a band-pass filter 22 added to an input terminal 21 and then demodulated by the FM demodulator 23. The demodulated signal is inputted to a low-pass filter 24 and becomes a signal having a DC component, and a signal (a) is inputted to a DC component shifting circuit 40 whose input and output are coupled together in terms of DC so that said DC component has an optimum DC level for the A/D converter 25. This DC component shifting circuit 40 has its input and output DC-coupled together and inputs the demodulation signal with the optimum DC level to the A/D converter 25 without waving the signal. Consequently, there is no step generated at a joint part during extension and a sound of high quality is reproduced.

80. 发明专利

JP2008067391A Output apparatus and output method 审中-公开
标题翻译：输出装置和输出方法
公开(公告)号：JP2008067391A
公开(公告)日：2008-03-21
申请号：JP2007233540
申请日：2007-09-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NOZOE MASAHIKO , KUDO YOSHIMICHI , OKAMOTO HIROO
IPC分类号： H04N7/167 , G11B20/10 , H04L9/08 , H04N5/91 , H04N7/173 , H04N21/4363 , H04N21/4405 , H04N21/4623
摘要： PROBLEM TO BE SOLVED: To grasp the number of devices, each of which receives stream data even when a device which relays a stream is connected in stream data transmission on a copyright protected bus.
SOLUTION: When performing authentication with a device of a relay destination, the device which relays a stream performs authentication for relay with a device of a relay source. The device of the relay source makes increment the number of devices, each of which receives the stream, based on the authentication. When stream transmission between the relaying device and the relay destination device is finished, the relaying device notifies the relay source device about the number of relay destination devices. The relay source device makes decrement the number of devices, each of which receives the stream, based on the notification.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：即使当中继流的设备以版权保护的总线上的流数据传输连接时，要掌握设备的数量，每个设备都接收流数据。解决方案：当与中继目的地的设备进行认证时，中继流的设备对中继源的设备进行中继认证。基于认证，中继源的设备使每个设备接收流的设备数量增加。当中继设备和中继目的设备之间的流传输完成时，中继设备向中继设备通知中继目的设备的数量。中继源设备根据该通知使每个接收流的设备的数量减少。版权所有（C）2008，JPO＆INPIT

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