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公开(公告)号：JP2000022469A
公开(公告)日：2000-01-21
申请号：JP18382998
申请日：1998-06-30
Applicant: SONY CORP
Inventor： MIURA MASAMI , YABE SUSUMU , IDEOKA YOSHIHIKO
Abstract: PROBLEM TO BE SOLVED: To improve a response characteristics when a level of an input audio signal changes from a large one to a small one. SOLUTION: The processing unit is provided with a gain control amplifier 52 that receives an input audio signal and a level detection circuit 61 that detects a level of the input audio signal, and also a control signal generating circuit 63 that generates a control signal of a gain of the gain control amplifier 52 according to a detection signal of the level detection circuit 61. The gain control amplifier 52 has an input output characteristics where the received input audio signal is compressed to a level and the compressed signal is outputted. A response time of the gain control amplifier 52 whose gain changes from a small one to a large on by decreasing a large level of the input audio signal into a smaller level is changed depending on setting contents of level compression and a history of a level change in the input audio signal.
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公开(公告)号：JPH1169496A
公开(公告)日：1999-03-09
申请号：JP22591197
申请日：1997-08-22
Applicant: SONY CORP
Inventor： MIURA MASAMI
Abstract: PROBLEM TO BE SOLVED: To provide an easily usable voice processor. SOLUTION: This processor is provided with a level conversion circuit for level-converting and outputting input voice signals and a setting means for setting the input/output characteristics of the level conversion circuit to a standard state, a first state and a second state. The input/output characteristics of the level conversion circuit are turned to the linear characteristics 90 at a prescribed gain at the time of being set to the standard state, turned to the characteristics 91 and 92 for the gain larger than the prescribed gain, in which gain becomes larger as an input level is lowered at the time of being set to the first state and turned to the characteristics 93 and 94 for the gain smaller than the prescribed gain, in which gain decreases as the input level is increased at the time of being set to the second state.
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公开(公告)号：JPH10294997A
公开(公告)日：1998-11-04
申请号：JP10121397
申请日：1997-04-18
Applicant: SONY CORP
Inventor： MIURA MASAMI
Abstract: PROBLEM TO BE SOLVED: To provide a check device and a circuit for it by which a characteristic of a hearing aid is surely recognized with fidelity. SOLUTION: A device is provided with an amplitude change circuit 65 that changes an amplitude of a consonant component of a received voice signal, a start point detection circuit 73 that detects a start point of a voiced sound of the voice signal, an end point detection circuit 73 that detects the end point of the voiced sound of the voice signal, and a control circuit 74 that controls the gain of the amplitude change circuit 65 according to outputs of the start point detection circuit 73 and the end point detection circuit 73. When the start point detection circuit 73 detects a start point, the control circuit 74 applies a control signal to decrease the gain to the amplitude change circuit 65 and when the end point detection circuit 73 detects an end point, the control circuit 74 applies a control signal to restore the gain to the amplitude change circuit 65.
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公开(公告)号：JPH10126896A
公开(公告)日：1998-05-15
申请号：JP29818196
申请日：1996-10-22
Applicant: SONY CORP
Inventor： MIURA MASAMI , YABE SUSUMU , IDEOKA YOSHIHIKO
Abstract: PROBLEM TO BE SOLVED: To provide an inspecting device for hearing aid capable of certainly and truly knowing the characteristic of a hearing aid and of securing inspector's safety. SOLUTION: A sound collecting part 10, a signal processing circuit 20 and an earphone part 30 are provided. The sound collecting part 10 is composed of an acoustic tube 11 for acoustically simulating plane wave propagation of sound wave in his/her external auditory meatus and a microphone unit 15 for collecting the sound wave in the acoustic tube 11 and outputting a speech signal. The signal processing circuit 20 is provided with a simulator circuit 23 for converting the voice signal into a signal having a characteristic corresponding to user's hearing characteristic of the hearing aid, and limiters 26 and 28 for limiting the maximum level of the speech signal. The earphone part 30 is composed of an earphone unit 35 for converting the speech signal from the signal processing circuit 20 into a sound wave and another acoustic tube 31 for plane- wave-propagating the converted sound wave into the inspector's external auditory meatus.
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公开(公告)号：JPH1026998A
公开(公告)日：1998-01-27
申请号：JP19834096
申请日：1996-07-09
Applicant: SONY CORP
Inventor： MIURA MASAMI , YABE SUSUMU , IDEOKA YOSHIHIKO
Abstract: PROBLEM TO BE SOLVED: To provide the voice processing device which is efficient against dark noises and has a good operability. SOLUTION: The level of inputted voices is converted from a minimum audible value HL that is the minimum level, in which words are barely recognized, to an uncomfortable threshold value UCL in which the level is too large for a listening. Then, an input output level converting characteristics are set by the value HL, the input voice level which is to be amplified to the value HL, the value UCL and the input voice level which is to be limited by the value UCL.
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Patent Agency Ranking
公开(公告)号：JPH08179792A
公开(公告)日：1996-07-12
申请号：JP33541094
申请日：1994-12-22
Applicant: SONY CORP
Inventor： MIURA MASAMI
Abstract: PURPOSE: To provide a speech processing device by which immediacy can be secured and a listenable voice can be outputted. CONSTITUTION: An amplitude suppressing circuit is arranged to a speech signal. Amplitude suppressing operation anticipates a part being punctuation of a collective speech part (a continuous voice) on the speech signal, and suppresses amplitude according to it. When a start part of the continuous speech is discriminated, the suppression of amplitude is released. Therefore, the amplitude is suppressed in a punctuation part of the collective speech part without impairing immediacy, and articulation to recognize all collective speech parts can be improved.
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公开(公告)号：JPH0736487A
公开(公告)日：1995-02-07
申请号：JP18033193
申请日：1993-07-21
Applicant: SONY CORP
Inventor： MIURA MASAMI
Abstract: PURPOSE:To provide the speech signal processor which can improve articulation without spoiling instantaneity. CONSTITUTION:This speech signal processor is provided with an extracting means 4 which extracts a pitch component or formant component from an input speech signal, a detecting means 5 which detects the tail part of a continuous speech from the output state of the extracting means 4, a delay means 2 which delays the input speech signal by a slight time, and an amplitude suppressing means 3 which suppresses the amplitude of the speech signal delayed by the delay means 2 according to the detection state of the detecting means 5; when the detecting means 5 detects the tail part, the amplitude suppressing means 5 suppresses the speech signal for a specific time.
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公开(公告)号：JPH0715282A
公开(公告)日：1995-01-17
申请号：JP15051793
申请日：1993-06-22
Applicant: SONY CORP
Inventor： MIURA MASAMI , MITANI MASAAKI
Abstract: PURPOSE:To provide a filtering device which can satisfactorily extract only the desired component such as noise removal. CONSTITUTION:In the filtering device, an input signal is successively delayed by plural delay means 11a, 11b, 11c...11n, coefficients are multiplied to the input signal and the outputs of the respective delay means by respectively different coefficient multipliers 12a, 12b, 12c...12n+1, the outputs of these respective coefficient multipliers 12a-12n+1 are added, and the desired component of the input signal is extracted. Concerning such a filtering device, the difference of the input signal is detected by a difference detection circuit 2, the coefficients of the respective coefficients multipliers 12a-12n+1 are set based on this detected difference, and the setting of coefficients based on this difference is performed by using linearly approximated functions.
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公开(公告)号：JPH06289898A
公开(公告)日：1994-10-18
申请号：JP7224393
申请日：1993-03-30
Applicant: SONY CORP
Inventor： MIURA MASAMI
Abstract: PURPOSE:To perform excellent amplitude control without distorting a speech. CONSTITUTION:An input speech signal obtained at a speech signal input terminal 1 is separated by a low-pass filter 11 and a high-pass filter 13 into at least a low-frequency component containing a pitch frequency and a 1st formant component and a high frequency component containing a 2nd formant component and after at least either the low frequency component and high frequency component has its amplitude controlled by an amplitude control means 12, both the components are added by an adder 2.
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公开(公告)号：JPH06133953A
公开(公告)日：1994-05-17
申请号：JP31148692
申请日：1992-10-27
Applicant: SONY CORP
Inventor： MIURA MASAMI
IPC: A61B5/12
Abstract: PURPOSE:To enable the time resolution of an auditory system for perceiving the pauses between sounds to be readily examined in a short CONSTITUTION:During the period in which noise is generated by a noise source 4, signals indicating detection of a predetermined frequency band wherein a silent period DELTAt is provided are successively generated, while maskers lower in level than the detection signals and having a frequency band except that of the detection signals are successively generated from a noise source 3. The signals and the maskers are mixed together at an audio signal control portion 7 and given to a testee as examining sounds via an earphone 9. The pauses between the successive sounds are gradually narrowed to determine the time resolution of the testee by detecting at which level the testee becomes unable to perceive the pauses.
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