公开(公告)号：JPS61182125A

公开(公告)日：1986-08-14

申请号：JP2139285

申请日：1985-02-06

申请人： NEC CORP

发明人： KAJI KATSUHIKO

IPC分类号： G06F3/02 ,  G06F17/40

摘要： PURPOSE:To facilitate an easy shift of an input device by setting the wireless MODEM between the input device and a computer. CONSTITUTION:The wireless MODEM 2 and 5 are set between an input device 1 for handwritten characters for input of information and an information processing computer 6. The input data given from the device 1 are modulated by the MODEM2 and turned into the wireless information. This wireless information is radiated into the space via a transmission antenna 3 and received by a reception antenna 4. This received data is demodulated by the MODEM5 and turned into the data that can be decoded by the computer 6.

公开(公告)号：JPH0346452A

公开(公告)日：1991-02-27

申请号：JP18025589

申请日：1989-07-14

申请人： NEC CORP

发明人： KAJI KATSUHIKO

IPC分类号： H04M3/56 ,  H04B3/20

摘要： PURPOSE:To prevent generation of an echo during voice conference by interrupting electrically a voice signal inputted from an opposite station to its own station at the measurement of indoor echo in a voice conference equipment provided with an echo canceller. CONSTITUTION:When indoor voice echo is measured by a voice conference device 10, at first a switch 108 is closed and a white level noise signal is outputted from a noise generator 106 to a speaker 102 via an echo canceller 104. The canceller 104 stores the attenuation of the voice of a white noise signal outputted from the speaker and the elapse of time from the point of time when the voice of the white level noise signal outputted from the generator 106 till a point of time when the echo sound 12 is inputted to a microphone 100. In this case, a switch 110 is opened in interlocking with the switch 108 turned on and the input signal from the voice conference device 20 at the opposite station is interrupted. Thus, noise such as talking voice 22 inputted from the microphone 200 at the equipment 20 of the opposite station at the measurement of voice echo is interrupted and mismeasurement is avoided.

公开(公告)号：JP2001282949A

公开(公告)日：2001-10-12

申请号：JP2000101464

申请日：2000-04-03

申请人： NEC CORP

发明人： KAJI KATSUHIKO

IPC分类号： A63C19/00 ,  G06Q10/02 ,  G06Q20/00 ,  G06Q20/24 ,  G06Q30/06 ,  G06Q50/00 ,  G06Q50/10 ,  G06F17/60

摘要： PROBLEM TO BE SOLVED: To provide an entry system which performs a reservation job of a golf course, etc., or a ticket reservation job through a network such as the Internet and performs even charge settlement through the network. SOLUTION: This entry system consists of a user terminal used to make a reservation or the like by a player, a person wanting to purchase a ticket, etc., a portable telephone or a PHS similarly used to make a reservation, etc., as a portable terminal, a weather report server providing weather report information, a reservation server performing reservation/lottery job of the golf course, the ticket, etc., and a credit processing server performing a charge settlement job, and they are respectively and mutually connected to the network such as the Internet.

公开(公告)号：JPH04129370A

公开(公告)日：1992-04-30

申请号：JP25084690

申请日：1990-09-20

申请人： NEC CORP

发明人： KAJI KATSUHIKO

IPC分类号： H04M3/56

摘要： PURPOSE:To attain the setting coincident with acoustic environment of its own room without being affected from an opposite conference room by interrupting a call from the opposite conference room at the training of an acoustic echo canceller, inserting a white noise signal to a reception line and also interrupting a transmission line. CONSTITUTION:The training of an acoustic echo cancel(EC) is implemented such that a white noise signal(WN) outputted from a test signal generating circuit 8 is received by a reception amplifier 9 via the EC 3 by a test signal inserting circuit 7 and the WN loud-spoken by a speaker 10 is collected by a microphone 1 via an acoustic path of a conference room. A bypass signal of the collected WN is amplified by a transmission amplifier 2 and the amplified signal is inputted to the EC 3, and since the WN selected by the circuit 7 is connected to the input of the EC 3, the EC 3 generates a pseudo echo signal and reaches the converging state. Thus, the EC 3 is trained in the optimum state to the acoustic environment of the conference room, the conference start is prepared, and as soon as the circuit 7 selects the circuit 8, a training signal transmission stop circuit 4 is active and the transmission of an output of a training signal to the transmission line is interrupted.

公开(公告)号：JPS62252223A

公开(公告)日：1987-11-04

申请号：JP9443386

申请日：1986-04-25

申请人： NEC CORP

发明人： KAJI KATSUHIKO

IPC分类号： H04B7/00 ,  G06F3/16

摘要： PURPOSE:To remarkably expand the moving range of a worker carrying a conventinal analog radio equipment, by combining a wireless modem, the analog radio equipment, and a movable sound input device. CONSTITUTION:Analog radio equipments(WL)2 and 3 are provided, and a microphone 1 is connected to the radio equipment 2 on one side. And the radio equipment 3 on the other side is connected to a portable type sound input device(SR)4. A wireless modem(WM)5 is connected to the portable type sound input device 4. The worker performs the input of sound from the portable sound input device 4 within the applied range of the radio equipments 2 and 3, carrying the portable sound input device within the range of the wireless modems 5 and 6. The price of the wireless modem is cheaper down to 1/10 of a work range expanding measure using conventional antenna, and analog amplifier, and as a result, it is possible to construct a system economically.

公开(公告)号：JPS6416160A

公开(公告)日：1989-01-19

申请号：JP17116087

申请日：1987-07-10

申请人： NEC CORP

发明人： KAJI KATSUHIKO

IPC分类号： H04B17/00 ,  H04B3/46 ,  H04M3/26

摘要： PURPOSE:To constitute an economic system by performing the loop back test remotely from an attended station to an unmanned line concentrating station. CONSTITUTION:A loop back measurer 2c of an A line concentrating station 2 is controlled by a remote control console 1a provided in an attended station 1 through a control line 3, and meanwhile, a loop back measurer 4c of a B line concentrating station 4 is controlled through a control line 5. Consequently, loop back measurers 2c and 4c access trunk cirucit terminating equipments 2b and 4b respectively to perform loop back L1-L6. Since measured results are transmitted to the remote control console 1a of the attended station 1 through control lines 3 and 5 in the reverse direction, the loop back test between line concentrating stations is perform remotely in the manned station.

公开(公告)号：JPS59163929A

公开(公告)日：1984-09-17

申请号：JP3760383

申请日：1983-03-08

申请人： Nec Corp

发明人： KAJI KATSUHIKO

IPC分类号： H04B17/40

CPC分类号： H04B17/403

摘要： PURPOSE:To attain sure retrieval of improper contactness of a connecting point of coaxial cables by superimposing a failure position retrieval signal provided between adjacent channel bands on a low frequency band of a relay transmission line. CONSTITUTION:A failure position retrieval signal band 14 provided at the low frequency region of a transmission line band 13 causes attenuation 16 at a coaxial cable connection defective point more remarkably than that of a high frequency failure location retrieval signal band 15. The attenuation 16 at a connection defect point 8 of a low frequency failure location retrieval signal 2 of a repeater 5 is detected by a relay transmission line supervisory circuit 10 of a station 9 at receiving terminal. On the other hand, low frequency failure location retrieval signals 3, 4 of repeaters 6, 7 are detected respectively at a normal level by relay transmission line supervisory circuits 11, 12. Thus, the coaxial cable connection defective point 8 is detected surely from the result.

摘要翻译： 目的：通过叠加在继电器传输线的低频带上的相邻信道频带之间提供的故障位置检索信号来确保同轴电缆的连接点的不正确接触性的恢复。 构成：设置在传输线带13的低频区域处的故障位置检索信号频带14使得在同轴电缆连接缺陷点处的衰减16比高频故障位置检索信号频带15更为明显。 中继器5的低频故障位置检索信号2的连接缺陷点8由接收终端的站9的中继传输线路监控电路10检测。 另一方面，中继器6,7的低频故障位置检索信号3,4分别由中继传输线路监控电路11,12在正常级别检测。因此，从同轴电缆连接缺陷点8可靠地检测到同轴电缆连接缺陷点8 结果。

公开(公告)号：JPS59153366A

公开(公告)日：1984-09-01

申请号：JP2833783

申请日：1983-02-22

申请人： Nec Corp

发明人： KAJI KATSUHIKO

IPC分类号： H04Q3/58 ,  H04M1/74 ,  H04M13/00

CPC分类号： H04M1/74

摘要： PURPOSE:To stabilize the line by making the telephone set input impedance equal at hook-on and hook-off of a handset to prevent generation of singing. CONSTITUTION:A two-wire line 2W is connected to a hybrid H via normally closed contacts of switches S1, S2 and an output of a transmission amplifier A1 and an input of a receiving amplifier A2 are connected to the hybrid H. Further, a transmitter S is connected to the input of the amplifier A1 via a hook switch SH1 and a receiver R is connected to the output of the amplifier A2 via a hook switch SH2 respectively. When the switches SH1, SH2 are opened and a call signal is incoming at on-hook state, a bell circuit BL is activated. When the handset is lifted up and hooked on, the switches SH1, SH2 are closed so as to be calling state. Since the switches SH1, SH2 are located at the handset side of the amplifier A1, A2, even if the switches SH1, SH2 are switched, no effect given to the hybrid H. That is, the impedance of the 2W is unchanged.

摘要翻译： 目的：通过使手机的挂机和挂机使电话机的输入阻抗相等，以防止歌唱的产生，来稳定线路。 构成：双线线路2W通过开关S1，S2的常闭触点和发送放大器A1的输出端连接到混合器H，并且接收放大器A2的输入端连接到混合器H.另外，发送器 S通过钩开关SH1连接到放大器A1的输入，接收器R分别经由钩形开关SH2连接到放大器A2的输出端。 当开关SH1，SH2打开并且呼叫信号在挂机状态进入时，振铃电路BL被激活。 当手机被提起并挂接时，开关SH1，SH2关闭，以便处于呼叫状态。 由于开关SH1，SH2位于放大器A1，A2的手机侧，所以即使切换开关SH1，SH2，也不会对混合动力H施加影响。即，2W的阻抗不变。