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1. 发明专利

JPH0421235A DELAY DETECTOR FOR DEMODULATING POLYPHASE MODULATION WAVE 失效
公开(公告)号：JPH0421235A
公开(公告)日：1992-01-24
申请号：JP12624490
申请日：1990-05-16
申请人： KYOCERA CORP
发明人： MOROHISHI MASANORI
IPC分类号： H04L27/227 , H04L27/22
摘要： PURPOSE:To correct the effect due to deviation of a carrier frequency automatically by calculating vectors of signals after detection of delay and controlling a coefficient of a vector multiplier through the use of an output data after vector calculation and a data after discrimination of a threshold level. CONSTITUTION:An output of a delay detector 100 is subject to A/D conversion for each symbol in the timing of threshold level discrimination, that is, when an eye pattern is opened at maximum, vector calculation is applied to the result of A/D conversion to correct a deviation corresponding to the carrier frequency by shifting the deviation reversely. Vector multiplier outputs I1, Q2 and outputs I2, Q2 of threshold level discrimination circuits 104, 105 are inputted to a coefficient control circuit 106. A loop of the coefficient control circuit 106 is operated to have the relation of 2pi fT=-DELTAtheta and controls the carrier frequency that its deviation is always 0, then its is possible to make the effect of the deviation of the carrier frequency for each burst sufficiently small.

2. 发明专利

JPH08202399A POST PROCESSING METHOD FOR DECODED VOICE 失效
公开(公告)号：JPH08202399A
公开(公告)日：1996-08-09
申请号：JP1157695
申请日：1995-01-27
申请人： KYOCERA CORP
发明人： MOROHISHI MASANORI
IPC分类号： G10L19/08 , G10L19/00 , G10L19/04 , G10L19/06 , H03H21/00 , H03M7/30 , G10L9/14 , G10L9/18
摘要： PURPOSE: To obtain a high quality decoded voice by adaptively controlling a coefficient of a high pass filter for emphasizing articulation of a decoded voice. CONSTITUTION: This device is constituted with a formant emphasizing filter 1, a high pass filter 2 of which a coefficient is variable, a power gain correcting section 3, and a filter coefficient control section 4. And the filter coefficient control section 4 calculates a rate of power of a high band for power of an input voice, and controls a filter coefficient with the value. Further, the high pass filter 2 filters an output of the formant emphasizing filter 1 using a coefficient decided by the filter coefficient control section 4, adjust smoothly variation of power of an input and an output of an adaptive post filter in the power gain correcting section 3, and makes it an output of the adaptive post filter. Thereby, articulation can be controlled without emphasizing a rasping noise and distortion of a wide band.

3. 发明专利

JPH08202394A VOICE DETECTOR 失效
公开(公告)号：JPH08202394A
公开(公告)日：1996-08-09
申请号：JP1157595
申请日：1995-01-27
申请人： KYOCERA CORP
发明人： MOROHISHI MASANORI
IPC分类号： G10L11/02 , G10L9/12
摘要： PURPOSE: To prevent missing a word head when a silence state is switched to a sound state, to hold a natural characteristic of a call, and to realize a high quality call, in a voice detector detecting existence of a voice signal using voice power. CONSTITUTION: A voice detector detecting voice power and the like per unit of a frame of some fixed length and detecting existence of a voice consists of a voice power calculator 10 calculating voice power of some fixed length from a discrete input signal every one sample, a maximum value detecting circuit 11 detecting the maximum value of an output from the voice power calculator 10 in a section specified for each frame, and a discriminating circuit 12 discriminating whether the frame is a voice signal or a silent signal using an output from the maximum value detecting circuit 11.

4. 发明专利

JPH08102727A ERROR RATE ESTIMATION SYSTEM 失效
公开(公告)号：JPH08102727A
公开(公告)日：1996-04-16
申请号：JP23738994
申请日：1994-09-30
申请人： KYOCERA CORP
发明人： MOROHISHI MASANORI
IPC分类号： H04L27/22 , H04L1/00
摘要： PURPOSE: To estimate an accurate error rate under various error environments by calculating the dispersion of the data obtained by applying the A/D conversion to the output of a detector in the reproduction timing, estimating an error environment based on the calculated dispersion value, and correcting the estimated error rate calculated from the output of the detector. CONSTITUTION: A detector 1 applies the quadrature detection to the received QPSK modulated wave, and a clock generator 2 reproduces a symbol clock to reproduce the data from the output of the detector 1. The A/D converters 3 and 4 digitize the output of the detector 1, and a dispersion calculation part 5 calculates the dispersion (every N pieces) of a short time of the input data and inputs this calculated dispersion to a conversion table 6 and a statistic value calculation part 8. The table 6 converts the input data into a memory address and inputs an error rate corresponding to the dispersion of a short time and stored in a memory to a read control part 7. The part 7 calculates the dispersion of a short time of M times included in a measurement range. Then the part 8 calculates the statistic value for each measurement range of dispersion of a short time and inputs this calculated value to the part 7. The part 7 averages the input error rates every M pieces and corrects the averaged estimated error rate based on the average dispersion value of each short time.

5. 发明专利

JPH06164479A PORTABLE TELEPHONE SET 失效
公开(公告)号：JPH06164479A
公开(公告)日：1994-06-10
申请号：JP31743592
申请日：1992-11-26
申请人： KYOCERA CORP
发明人： MOROHISHI MASANORI , MURAMATSU TAKASHI
IPC分类号： H04B7/26 , H04B14/04 , H04W88/02
摘要： PURPOSE:To provide a digital portable telephone set reproducing a clear sound without deteriorating tone from the beginning. CONSTITUTION:At the time of communication, encoding voice data encoded by a voice encoder 2 with the internal state information of the encoder 2 at the time of encoding a leading frame added are stored in a memory M. Encoding voice data from the opposite party decoded by a high frequency section 3 are decoded by a voice decoder 4 and stored in the memory 3 with the internal state information of the voice decoder 4 at the time of decoding the leading frame added. In the stored two-system encoding voice data, each leading frame is decoded with the use of the stored internal state information.

6. 发明专利

JPH08204654A VOX CONTROLLER 失效
公开(公告)号：JPH08204654A
公开(公告)日：1996-08-09
申请号：JP891295
申请日：1995-01-24
申请人： KYOCERA CORP
发明人： MOROHISHI MASANORI
IPC分类号： H04B14/04
摘要： PURPOSE: To reduce non-detection/mis-detection of a unique word and to improve the reliability by controlling an error permission rate of detecting the unique word in a unique word detection means through the detection of power. CONSTITUTION: An estimated power of a received RF signal being one burst signal from an RF power measurement device 6 is received by a unique word detector 5 to control an error permissible range in the detection of the unique word. That is, when the power of the received RF signal of the present burst is extremely smaller than the power of the preceding burst, it is highly possible that the data pattern sent in the preceding burst is postamble data, then an error permissible range in the unique word detector 5 is extended. When the power of the reception RF signal of the current burst is extremely larger than the power of the preceding burst, since the probability of the data pattern sent in the burst to be preamble data is high, the error permissible range in the unique word detector 5 is extended.

7. 发明专利

JPH05119800A HIGH-EFFICIENCY COMPRESSING METHOD FOR DIGITAL SPEECH DATA 失效
公开(公告)号：JPH05119800A
公开(公告)日：1993-05-18
申请号：JP27740291
申请日：1991-10-24
申请人： KYOCERA CORP
发明人： MOROHISHI MASANORI
IPC分类号： G10L19/08 , G10L19/00 , G10L19/04 , G10L19/12 , H03M7/30
摘要： PURPOSE:To compress information to be recorded or sent more by further encoding digital speech data, generated by compressing a digitized speech signal by encoding, with high efficiency. CONSTITUTION:Parameters showing the sound source and modulation characteristics of a speech are extracted, frame by frame, from the digital speech data divided into frames of short sections by a parameter division part 32, and the parameters are sectioned, frame by frame; and a code corresponding to the appearance probability of an information source symbol is assigned to parameters having the statistical partiality in each group of respective parameters to decrease the number of bits of each data.

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