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1. 发明专利

JPH1118174A CONTROL SYSTEM FOR WIRELESS KEYPAD 失效
公开(公告)号：JPH1118174A
公开(公告)日：1999-01-22
申请号：JP16269797
申请日：1997-06-19
申请人： YAGI ANTENNA , HITACHI LTD
发明人： NISHIZAWA TAKAHIKO , SHIGA MICHINORI , NAKANO KOICHIRO , HIROSE MASATOSHI
IPC分类号： G09B5/06 , H04N5/232 , H04N7/18 , H04Q9/00
摘要： PROBLEM TO BE SOLVED: To allow a keypad to be moved to an arbitrary position, to adjust the number of keypads arbitrarily so as to allow the system to cope easily with even the case that number of attendants is not constant. SOLUTION: Each of keypads 11a-11n is provided with plural operation keys and microphones or the like and makes optical communication with optical transmission reception controllers 12a-12m via an infrared-ray transmission reception section. Each of the optical transmission reception controllers 12a-12m is provided with plural optical transmission reception elements 14 that send/ receive a light within different angular ranges, a changeover device 13 is used to sequentially select the optical transmission reception elements 14 to provide an output of control information to the keypads 11a-11n. A host computer 15 is connected to the optical transmission reception controllers 12a-12m and discriminates their positions by a questionnaire request from a keypad for allowing a TV camera 16 to be directed in the direction of the party making the questionnaire. Furthermore, the host computer 15 permits a question to the keypad which receives the questionnaire and sends a voice signal of the party making the questionnaire received from a microphone to a lecture room, together with a video signal from the TV camera 16.

2. 发明专利

JPS6447191A SIGNAL LEVEL ADJUSTOR WITH TELEVISION SUBSCRIBING TERMINAL 失效
公开(公告)号：JPS6447191A
公开(公告)日：1989-02-21
申请号：JP20389587
申请日：1987-08-17
申请人： YAGI ANTENNA , HITACHI LTD
发明人： SHIGA MICHINORI , KITATANI CHIHIRO , YAGYU KAZUO
IPC分类号： H04N7/16 , H03H7/46 , H04L12/40 , H04L12/413 , H04N7/173
摘要： PURPOSE:To eliminate the movement of a terminal and adjustment at a newly subscribing time by adjusting a branch monitoring output with the directional coupler of a receiving signal to a data terminal and further subscribing a television receiver through a band-pass filter to a network. CONSTITUTION:When the adjustment of a receiving signal level in respective data terminals 32a, 32b,... is executed, a reference signal is generated in a reference signal generator 35 and sent through a head end 34 to a transmission path 31. The receiving signal inputted to a signal level adjustor 11a is supplied to a distributor 16 and a signal in a data signal side is divided from a transmission signal through a divider 17 and further, it is distributed to a data terminal 13 and a monitoring terminal 14 through a demultiplexer 18 and a directional coupler 21. Here, a level which the terminal 32a needs is adjusted by a variable attenuator 19. A transmission signal level is adjusted by a variable attenuator 20. Further, a signal distributed to a TV signal side by the distributor 16 is supplied through a BPF22 to a television receiver terminal 15. Thus, the movement of the terminal and the adjustment at the newly subscribing time can be eliminated.

3. 发明专利

JPH01254034A PERMANENT VIRTUAL LINE ESTABLISHING SYSTEM 失效
公开(公告)号：JPH01254034A
公开(公告)日：1989-10-11
申请号：JP8119588
申请日：1988-04-04
申请人： YAGI ANTENNA , HITACHI LTD
发明人： SHIGA MICHINORI , SATO SADASHI , KITATANI CHIHIRO , OHIRA YUTEN , YAGYU KAZUO
IPC分类号： H04L12/40
摘要： PURPOSE:To reduce the leading time of the entire system by providing a nonvolatile memory able to be written by each terminal subscriber and storing information of a permanent virtual line therein. CONSTITUTION:The terminal subscriber device 11 is provided with a data transmission program 22 starting a CPU 21 controlling the entire subscriber device and a nonvolatile memory 23 able to be written for storage of permanent virtual line information. Plural broad band LAN terminal subscriber devices 11a, 11b,... offer a virtual line for 1:1 data transmission able to select an optional opposite party to terminal equipments 12a, 12b,... connected respectively. The user of the broad band LAN establishes the virtual line by the command input from the terminal equipment upon the start of data transmission with the opposite terminal equipment to apply the data transmission with the opposite terminal equipment and its user. Thus, the leading time of the entire system is reduced.

4. 发明专利

JPH01120145A BATCH PROCESSING SYSTEM FOR BROAD-BAND LAN DATA PACKET 失效
公开(公告)号：JPH01120145A
公开(公告)日：1989-05-12
申请号：JP27734487
申请日：1987-11-04
申请人： YAGI ANTENNA , HITACHI LTD
发明人： OHIRA YUTEN , KITATANI CHIHIRO , SHIGA MICHINORI , YAGYU KAZUO , TERADA MATSUAKI
IPC分类号： H04N7/16 , H04L12/40
摘要： PURPOSE:To reduce processing load on a broad-band LAN terminal subscriber device by providing a variable timer for the timing of data packet transmission to a transmission line. CONSTITUTION:When an optional terminal equipment among terminal equipments 12a-12d sends one character, the CPU 21 of the terminal subscriber equipment 11 stores it in its backup area 23b. At this time, the variable timer is started according to a variable timer value stored in the variable timer value initial setting area 23 unless the area 23a is full. When this variable timer enters a time-out state, characters stored in the area 23b so far are sent in one data packet to a coaxial cable trunk line 15 through a high-frequency modem device 13.

5. 发明专利

JPH0269039A SYSTEM FOR DISPLAYING ESTABLISHED STATE OF BROAD-BAND LAN LOGIC LINE 失效
公开(公告)号：JPH0269039A
公开(公告)日：1990-03-08
申请号：JP22163488
申请日：1988-09-05
申请人： YAGI ANTENNA , HITACHI LTD
发明人： OHIRA YUTEN , SHIGA MICHINORI , HIRATA TETSUHIKO
IPC分类号： H04N7/16 , H04L12/28 , H04L12/40
摘要： PURPOSE:To make the line utilizing state of each port of terminal subscribing equipment visible from a user by turning on an indicator LED to light when each terminal equipment connected with the terminal subscribing equipment establishes a logic line with another terminal equipment and turning off the LED when the logic line is released. CONSTITUTION:When a program 22d for indicating the established state of a logic line is actuated by means of the scheduler program 22a of terminal subscribing equipment 11, a port controlling counter provided in a memory section 23 is initialized. Then whether or not a port establishes a logic line with another port is discriminated by referring to status numbers enrolled in the port state displaying area 23a of the number indicated by the counter and, when the logic line is established, one of logic line established state indicating LED 18a-18d corresponding to the said port is turned on. When the logic line is not established, one of the LEDs 18a-18d corresponding to the said port is turned off.

6. 发明专利

JPH0246040A BROAD BAND LAN HOST COMPUTER CIRCUIT ESTABLISHING SYSTEM 失效
公开(公告)号：JPH0246040A
公开(公告)日：1990-02-15
申请号：JP19613288
申请日：1988-08-08
申请人： YAGI ANTENNA , HITACHI LTD
发明人： OHIRA YUTEN , SHIGA MICHINORI , YAGYU KAZUO
IPC分类号： G06F13/00 , H01G2/10 , H04L12/40
摘要： PURPOSE:To establish a circuit with a host computer without being conscious of the address and the port number of a remote terminal subscribing device by providing a terminal subscribing device for controlling host computer circuit to the one host computer at the time of executing communication with the host computer. CONSTITUTION:Plural terminal subscribing devices 1a... supply a logical virtual circuit for transmitting 1 to 1 data selectable and arbitrary object to terminal equipment 6a... and host computer ports 11a... connected to them respectively. A user establishes the logical virtual circuit by a command input from the used terminal equipment at the time of starting data transmitting with a remote terminal equipment and a host computer, and executes the data transmitting with the remote terminal equipment and the host computer. On the initial setting of a system, that is, at the time of connecting terminal subscribing devices 1c and 1d to a host computer 10, the user command-inputs the address of the devices 1c and 1d, a port number and the host computer circuit information of a port using state from terminal equipment 6e connected to a terminal subscribing device 1b for controlling host computer circuit and writes the host computer circuit information to a non-volatile memory in the device 1b.

7. 发明专利

JP2000232637A CAMERA VIDEO IMAGE TRANSMISSION SYSTEM 失效
公开(公告)号：JP2000232637A
公开(公告)日：2000-08-22
申请号：JP3106699
申请日：1999-02-09
申请人： YAGI ANTENNA
发明人： NAKANO KOICHIRO , SHIGA MICHINORI , SAWAI TAKETOMO , NISHIZAWA TAKAHIKO
IPC分类号： H04N7/18 , H04J1/00
摘要： PROBLEM TO BE SOLVED: To provide a camera video image transmission system that can prevent production of a switching noise at a low cost. SOLUTION: A center device 30 uses a modulator 36 to modulate a synchronizing signal from a synchronizing signal generator 35 with a carrier frequency fs, outputs the modulated signal to a down link of a 2-way transmission line 24 and distributes the signal to monitor cameras 21a, 21b,... Two-way filters and demodulators 40a, 40b demodulate the distributed synchronizing signal. The monitor cameras 21a, 21b,... output a video signal synchronously with the synchronizing signal to modulators 22a, 22b,..., which modulate the video signal with carrier frequencies f1, f2,... and the modulated signal is outputted to an up link of the 2-way transmission line 24 and fed to the center device 30. A 2-way filter 31 extracts the received video signal in the center device 30 and demodulators 33a, 33b demodulate the extracted video signal while selecting the signal for each prescribed time on the basis of the synchronizing signal from the synchronizing signal generator 35 and the monitor TVs 34a, 34b display the demodulated signal.

8. 发明专利

JPH08214287A VIDEO MONITORING SYSTEM 失效
公开(公告)号：JPH08214287A
公开(公告)日：1996-08-20
申请号：JP1791895
申请日：1995-02-06
申请人： YAGI ANTENNA
发明人： SAWAI TAKETOMO , AKIYAMA TAKAO , NISHIZAWA TAKAHIKO , SHIGA MICHINORI
IPC分类号： H04N7/18 , G08B21/00 , G08B25/00 , H04L12/28
摘要： PURPOSE: To construct a system by the use of a main line coaxial cable even in the case of a large system. CONSTITUTION: Monitor cameras 1a, 1b are respectively arranged on monitoring places and modulators 2a, 2b are respectively arranged in the vicinity of the cameras 1a, 1b. Video signals photographed by the cameras 1a, 1b are modulated by the modulators 2a, 2b and inputted to a coaxial cable 4 by respectively branches 3a, 3b as high frequency video signals for channels A, B and frequency- multiplexed signal is transmitted and inputted to an intermediate converter 6 built in an EPS 5. The converter 6 selects a signal of either one of the channels A, B, converts the frequency of the signal into an optional channel C and transmits the frequency-converted signal to a monitor room or the like by a branch 7 through a main line coaxial cable 8. In the monitor room, the video signal of the channel A or B sent from the converter 6 through the cable 8 is demodulated and the demodulated picture is displayed on a monitor TV to monitor it.

9. 发明专利

JPH11341463A VIDEO SIGNAL CHANGEOVER DEVICE 失效
公开(公告)号：JPH11341463A
公开(公告)日：1999-12-10
申请号：JP14778198
申请日：1998-05-28
申请人： YAGI ANTENNA
发明人： NISHIZAWA TAKAHIKO , SHIGA MICHINORI , HASHINO KATSUMI , SAWAI TAKETOMO
IPC分类号： H04N7/08 , H04N7/081 , H04N7/16 , H04N21/2365 , H04N21/438
摘要： PROBLEM TO BE SOLVED: To provide the video signal changeover device that is miniaturized and realized with a reduced cost and can change channels. SOLUTION: Video signals of a plurality of channels(CH) such as 16 channels (CHA=CHP) of video signals are multiplexed and the multiplexed signal is transmitted through a transmission line 11 of the frequency division multiplex system such as a CATV system. The video signals of the channels CHA-CHP sent through the transmission line 11 are fed to a demodulator 13, where the signals are demodulated and the demodulated signal is fed to a frame switcher 14. The frame switcher 14 provides an output of a vertical synchronizing signal (VD) and a channel switching signal (frame number) of the received video signal to the demodulator 13 to designate a demodulated channel. Furthermore, the frame switcher 14 selects the video signal demodulated by the demodulator 13 in the unit of frames and outputs the selected signal to a VTR 15, on which the signal is recorded. Moreover, a reproduced image on the VTR 15 is fed to a monitor TV 16 via the frame switcher 14.

10. 发明专利

JPH1117616A WIRELESS KEYPAD CONTROL SYSTEM 失效
公开(公告)号：JPH1117616A
公开(公告)日：1999-01-22
申请号：JP17215597
申请日：1997-06-27
申请人： YAGI ANTENNA
发明人： NISHIZAWA TAKAHIKO , NAKANO KOICHIRO , SHIGA MICHINORI
IPC分类号： H04B10/11 , G09B5/08 , H04B10/07 , H04B10/114 , H04N5/232 , H04B10/105 , H04B10/10 , H04B10/22
摘要： PROBLEM TO BE SOLVED: To allow a system to accurately detect the position of a keypad immuned from noise effect and to improve the S/N by increasing a level of a voice signal. SOLUTION: A keypad is provided with plural operation keys and a microphone or the like and makes optical communication with an optical transmission reception controller. The optical transmission reception controller is provided with an optical signal transmission reception section 13, consisting of plural light transmission reception elements that send/receive light within a different angular range. An MPU 43 receives a signal from a light-receiving element 13B and gives it to a filter 47 via a changeover switch 45b and selects a keypad reply signal and provides an output. A voice signal filter mixer 48 extracts voice signals included in the signals received by the light-receiving elements 13B and combines them and gives the result to a host computer via a directional coupler 41 with a response signal outputted from the filter 47.

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