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1. 发明专利

JPH10313320A VOICE CODING AND DECODING DEVICE 失效
公开(公告)号：JPH10313320A
公开(公告)日：1998-11-24
申请号：JP13742897
申请日：1997-05-13
申请人： NEC CORP
发明人： WAKE YASUHIRO
IPC分类号： H04Q3/00 , H04L12/28 , H04Q11/04
摘要： PROBLEM TO BE SOLVED: To improve the transmission quality of the silence compression voice coding and decoding device provided between an asynchronous transfer mode(ATM) line and an exchange. SOLUTION: A voice signal is given to a voice coder 102 of a voice-coding section from a voice input terminal 10. The voice-coding section 101 coverts a received voice code into coding data and provides an output of the data to a cell assembler 103. The voice detector 102 monitors at all times an input voice and provides an output of the monitored result (information of voice/ silence) to the cell assembler 103. The cell assembler 103 receives monitor information (information of voice/silence) also from a voice detector 205 of a voice- decoding section 200 and the voice detector 102, assemblies coded data from the voice coder 101 into cells, based on both the monitor information sets and transmits the cells to the ATM channel via an output terminal 11. The cell assembler 103 discriminates that a talker is providing an output of a voice signal, and that an opposite party is listening to the signal for a period when the voice detector 205 detects silence, even if it is a period in which the voice detector 102 detects silence and transmits cells of the coded data for the period as well.

2. 发明专利

JPH05244302A 失效
公开(公告)号：JPH05244302A
公开(公告)日：1993-09-21
申请号：JP4146392
申请日：1992-02-27
申请人： NEC CORP , NIPPON ELECTRIC ENG
发明人： WAKE YASUHIRO , USU KATSUNORI
IPC分类号： H04J3/00 , H04M11/00 , H04M11/06 , H04N1/00
摘要： PURPOSE:To attain high speed transmission of a facsimile signal when both a voice signal and the facsimile signal are sent. CONSTITUTION:A voice coder 17, a G3 facsimile demodulator 18, a G3 facsimile signal detector 19, a frame synchronization generator 21, a G3 control frame generator 22 and a multiplexer 23 are arranged in a coding section 12 connecting to an input terminal 11. When a facsimile signal is sent to a digital line 15, a G3 facsimile identification data are integrated in the frame. Furthermore, when G3 facsimile high speed data are sent, a special frame is inserted just before the data and the result is sent. An output of a voice decoder 25 or an output of a G3 facsimile modulator 26 in a decoding section 14 is outputted from a changeover device 29 to an output terminal 13.

3. 发明专利

JPH05122414A AUDIO ENCODING AND DECODING DEVICE 失效
公开(公告)号：JPH05122414A
公开(公告)日：1993-05-18
申请号：JP30536391
申请日：1991-10-24
申请人： NEC CORP , NIPPON ELECTRIC ENG
发明人： WAKE YASUHIRO , USU KATSUNORI
IPC分类号： H04N1/00 , H04M11/06 , H04N1/327
摘要： PURPOSE:To transmit even a G3 facsimile high-speed signal in time division at the time of sending the audio parameter of an audio encoder to a digital line by an audio frame. CONSTITUTION:When the input signal is an audio signal, it is encoded to an audio parameter by the audio encoder and is sent as an audio frame 20. When the input signal is a G3 facsimile signal, a G3 control frame 21 having the same constitution as the audio frame is first generated, and G3 facsimile data is sent as bit synchronizing data 22 thereafter. Since the G3 facsimile signal is sent to the digital line as bit synchronizing data, 9600bps high-speed facsimile data is transmitted regardless of 9600bps line.

4. 发明专利

JPH01207799A MULTIPULSE VOICE ENCODER 失效
公开(公告)号：JPH01207799A
公开(公告)日：1989-08-21
申请号：JP3335188
申请日：1988-02-15
申请人： NEC CORP
发明人： WAKE YASUHIRO
IPC分类号： G10L19/04
摘要： PURPOSE:To reduce the quantity of operation and to improve the quality of synthesized voice by selecting the number of pulses in each subframe based on a power ratio in each frequency component and extracting sound source pulses corresponding to the selected number of pulses. CONSTITUTION:The output results of band pass filters (BPFs) 1-N having respectively different passing bands are sent to a power calculating part 7 to calculate power in each frequency component. A pulse number assigning table 9 selects the number of pulses to be assigned to a subframe or the like based on the power rate of each frequency component. A pitch forecasting sound source pulse searching part 4 searches the pulse of a driving sound source successively based on the output of an LPC parameter extracting part 2, the output of a pitch extracting part 3 and the number of pulses in each subframe and forms the position of the sound source pulse and its amplitude. Consequently, the quantity of arithmetic operation can be reduced and the quality of synthesized voice can be improved.

5. 发明专利

JPH01191510A WEIGHTING FILTER IN AUDITORY SENSE 失效
公开(公告)号：JPH01191510A
公开(公告)日：1989-08-01
申请号：JP1454188
申请日：1988-01-27
申请人： NEC CORP
发明人： WAKE YASUHIRO
IPC分类号： G10L15/20 , G10L19/04 , G10L21/02 , H03H17/00 , H03H17/02
摘要： PURPOSE:To improve the S/N and to obtain voice with high quality by providing a long time spectral characteristic in matching with the pitch structure of an input voice to the substantial weighting filter with auditory sense. CONSTITUTION:The filter consists of the cascade connection of a short time weighting filter W1 using a linear prediction coefficient alphai representing short time spectral information of an input voice extracted from the input voice and the result of multiplying a constant gamma1, with the linear prediction coefficient and a long time weighting filter W2 using a pitch prediction coefficient (b) representing long time spectral information extracted from the input voice and the result of multiplying a constant gamma2 with the pitch prediction coefficient. Then the short time spectral information and the long time spectral information are used to give weighting to the input voice and the result is outputted as a coded data. Thus, the S/N in terms of auditory sense is improved more, and the voice with high quality is obtained.

6. 发明专利

JPS63185264A LINE SWITCHING CONTROL SYSTEM 失效
公开(公告)号：JPS63185264A
公开(公告)日：1988-07-30
申请号：JP1612087
申请日：1987-01-28
申请人： NEC CORP
发明人： WAKE YASUHIRO
IPC分类号： H04M7/00
摘要： PURPOSE:To structure the digital one-link telephone switched network of a speech encoder by providing a function for passing a call through the speech encoder. CONSTITUTION:Speech encoders 29 and 30 have means which output input values from a digital telephone exchange 26 to the speech encoders 29 and 30 to digital lines 29 and 30 as they are under the control of the digital telephone exchange 26 and means which output input values from the digital lines 32 and 33 to the speech encoders 29 and 30 to the digital telephone 26 as they are. A telephone exchange 25 sends the dial number of a telephone exchange 27 to the telephone exchange 26. The telephone exchange 26 controls the speech encoders 29 and 30 so that signals are passed through the speech encoder, and sends a received dial number to the telephone exchange 27 as it is.

7. 发明专利

JPS61274523A ECHO CONTROLLING DEVICE 失效
公开(公告)号：JPS61274523A
公开(公告)日：1986-12-04
申请号：JP11542985
申请日：1985-05-30
申请人： NEC CORP
发明人： WAKE YASUHIRO
IPC分类号： H04B3/20
摘要： PURPOSE:To simplify the constitution of a controller by providing a switch switching the output of an oscillator to an echo controller and a detector detecting an oscillation signal from the oscillator so as to attain the cascade connection of echo block circuits. CONSTITUTION:The echo block circuit 1 is connected to the transmission line of the echo controller and switches 4, 5 switching the oscillation signal of the oscillator 2 are provided between the circuit 1 and the transmission line. Further, input terminals T2, T3 to which the oscillation signal from the transmission line is inputted and an output terminal T4 are provided to a detector 3 and a disable terminal T1 of the circuit 1 is connected to the output terminal T4. The detector 3 detects the oscillation signal from the pre-stage and the result of detection is fed to the disable terminal T1 of the circuit 1. The echo blocking devices 8, 9, 10 with the constitution above are connected in cascade between hybrid circuits 6, 7 by transmission lines 11, 12 to simplify the echo controller.

8. 发明专利

JPH11352996A VOICE REGULATION SYNTHESIZING DEVICE 失效
公开(公告)号：JPH11352996A
公开(公告)日：1999-12-24
申请号：JP16123098
申请日：1998-06-10
申请人： NEC CORP
发明人： WAKE YASUHIRO
IPC分类号： G10L13/06 , G10L19/06 , G10L5/04 , G10L9/14
摘要： PROBLEM TO BE SOLVED: To suppress the noise generated by waveform discontinuity in the connecting point of phonemes with a novel structure. SOLUTION: In this voice regulating synthesizing device, plural kinds of voice element waveforms 11 and linear predicted coefficients 12 corresponding to the respective voice element waveforms 11 are stored in a voice element dictionary 1 for every phoneme. In a phoneme waveform connecting processing part 4, the voice element waveforms 11 connected in the arrangement order of character lines is waveform shaped according to the linear predicted coefficients 12 corresponding thereto by an auditory weighting filter 6.

9. 发明专利

JPH09261444A FACSIMILE SIGNAL TRANSMITTER 失效
公开(公告)号：JPH09261444A
公开(公告)日：1997-10-03
申请号：JP7080296
申请日：1996-03-27
申请人： NEC CORP
发明人： WAKE YASUHIRO
IPC分类号： H04N1/00 , H04M11/00 , H04N1/32
摘要： PROBLEM TO BE SOLVED: To correctly transmit an additional number also in a facsimile main service by releasing the operation of an echo suppressor at the time of detecting a transmission destination signal being the additional number. SOLUTION: A voice coding part 1 consists of an echo suppressor 10 preventing the leakage of a signal by disconnecting the signal which is outputted from a decoding part 2 and creeps to an input terminal as an echo by way of an output terminal 200 and the 4-wire and 2-wire conversion circuit of an exchange, and a PB detector 11, etc., detecting a push button dial signal inputted from the exchange by way of the input terminal 100. The output signal being the PB detecting result of the PB detector 11 at the voice coding part 1 controls the switch 25 and the delay circuit 24 in the voice decoding part 2 and when a PB signal is detected, resets a delay circuit 24 at the same time of switching the switch 25 to the side of the voice decoder and simultaneously stops the operation of the echo suppresor. Thereby the signal inputted from the input terminal 100 is inputted to a voice coder 12 by way of a delay circuit 15 as it is.

10. 发明专利

JPH09244998A ON-LINE PROGRAM PERFORMANCE INFORMATION SAMPLING DEVICE AND SAMPLING METHOD 失效
公开(公告)号：JPH09244998A
公开(公告)日：1997-09-19
申请号：JP5731096
申请日：1996-03-14
申请人： NEC CORP
发明人： WAKE YASUHIRO
IPC分类号： G06F11/34 , G06F15/00
摘要： PROBLEM TO BE SOLVED: To efficiently record the performance information of a transaction processing. SOLUTION: A communication management means 1 receives a transaction processing request from a user. Before starting a transaction corresponding to the processing request, a transaction processing monitoring means 3 samples the performance information of the transaction and an on-line program 2 executes the transaction corresponding to the processing request. At the end of the transaction, the transaction processing monitoring means 3 obtains the performance information of the transaction by sampling the performance information of the transaction and subtracting the performance information sampled before starting the transaction. A performance information working means 4 collates the performance information with predetermined performance information working conditions and works it to a recording form corresponding to a corresponding procedure. A performance information recording means 5 records the performance information worked into the recording form in a performance information storage area 6.

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