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1. 发明专利

JPS6424635A LED LIGHTING SYSTEM 失效
公开(公告)号：JPS6424635A
公开(公告)日：1989-01-26
申请号：JP18144687
申请日：1987-07-21
申请人： NIPPON TELEGRAPH & TELEPHONE , TOSHIBA CORP
发明人： MAKINO SHOJI , HIDA MIZUHIRO , OIKAWA HIROSHI , SAEKI TAKASHI , KUSHIGE NAOHIDE , MINAMI SHIGENOBU
IPC分类号： H04B1/08
摘要： PURPOSE:To reduce the power consumption by providing a short-circuit connecting plural light emitting elements in series mutually, connecting a constant current source circuit in series and using a switch elements so as to short- circuit selectively optional light emitting elements among the light emitting elements. CONSTITUTION:A power system consists of a lighting drive section A and a lighting control section B isolated and independent of each other. The lighting driving section A has two power sources composed of positive and negative power sources, and LEDs 51-5n connected in series with each other between power sources and a constant current source 6 are connected in series. Moreover, phototransistors 71a-7n-1a are connected respectively between each connecting point of the LEDs 51-5n and the negative power supply to constitute a short-circuit path of the LEDs. Thus, the driving current value is made constant independently of the number of driven LEDs 51-5n, thereby reducing the power consumption considerably.

2. 发明专利

JPS6429154A VOICE CONFERENCE EQUIPMENT 失效
公开(公告)号：JPS6429154A
公开(公告)日：1989-01-31
申请号：JP18517187
申请日：1987-07-24
申请人： NIPPON TELEGRAPH & TELEPHONE , TOSHIBA CORP
发明人： MAKINO SHOJI , KOIZUMI NOBUO , HIDA MIZUHIRO , KUSHIGE NAOHIDE , SAEKI TAKASHI , MINAMI SHIGENOBU
IPC分类号： H04M9/08
摘要： PURPOSE:To progress a conference smoothly by providing a gain control circuit inserting a variable gain circuit to each output of plural microphones and varying the gain of the variable gain circuit in response to the output voice signal level of the corresponding microphone so as to generate a voice with sufficient sound volume from a speaker even when the speaker and the microphone are approached. CONSTITUTION:Gain variable circuits 13a, 13b are controlled to a gain where an input level to an adder circuit 8 is a reference value or below independently of the acoustic coupling condition with corresponding microphones 6a, 6b and a speaker 5. Then the reference value used for a control circuit 12 is made correspondent to a cancel enable level of a bypass component in an echo cancellation circuit 2 to ensure the cancellation of the bypass component independently of the acoustic coupling condition between the microphones 6a, 6b and the speaker 5. In this case, the sound volume of the speaker 5 is fixed to the gain set in the amplifier circuit 4, then the voice from the opposite party is sounded with a sufficient sound volume.

3. 发明专利

JPH0883092A INFORMATION INPUTTING DEVICE AND METHOD THEREFOR 失效
公开(公告)号：JPH0883092A
公开(公告)日：1996-03-26
申请号：JP21994294
申请日：1994-09-14
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIDA MIZUHIRO , SAGAYAMA SHIGEKI
IPC分类号： G06F3/16 , G06K9/00 , G06K9/03 , G10L15/24 , G10L3/00
摘要： PURPOSE: To easily input the contents of information with high precision by providing a means to recognize visual sense information such as inputted characters, graphics and pictures and a means to recognize auditory sense information such as inputted voice and music. CONSTITUTION: An input switching section 3 switches and selects either one of a visual information input section 1 which inputs hand written characters and symbols and a visual sense information reading section 2 which reads already generated characters and symbols and the visual sense information is read. The contents of the information are recognized by a visual sense information recognition section 5 and the recognition results are rearranged in the order of liklihood by a recognition result sorting section 6. Similarly, the contents of the auditory sense information inputted by an auditory sense input section 4 are recognized and evaluated by an auditory sense information recognition section 7 and the recognition resluts are rearranged in the order of liklihood by a sorting section 8. When there are plural candidates to which both recognition results are matched, they are outputted to a recognition result output section 9 in the order of their overall degree of liklihood. Thus, correct information source is generated by combining relatively rough hand written character inputs, already existing hand written documents and voice recognition.

4. 发明专利

JPH0851686A CLOSED TYPE STEREOPHONIC HEADPHONE DEVICE 失效
公开(公告)号：JPH0851686A
公开(公告)日：1996-02-20
申请号：JP20029294
申请日：1994-08-03
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIDA MIZUHIRO , SAGAYAMA SHIGEKI
IPC分类号： H04R1/10
摘要： PURPOSE:To listen to an external noise and a sound at need while securing a state wherein a sound signal of music that is listened to does not leak out as to closed type stereophonic headphones. CONSTITUTION:The closed type stereophonic headphone device consists of stereophonic headphones, 1 for listening to the sound signal, a microphone 2 which gathers a noise of the device and a sound, a mixer 12 which composes sound information gathered by the microphone 2 in addition to the sound signal, and a changeover switch 14 including a gain control amplifier which can turns ON and OFF the external sound information output with the input of the mixer according to the use state of the stereo headphones.

5. 发明专利

JPH07129191A VOICE RECOGNITION DEVICE 失效
公开(公告)号：JPH07129191A
公开(公告)日：1995-05-19
申请号：JP27834793
申请日：1993-11-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIDA MIZUHIRO , NAGASHIMA HIROMI , TAKAHASHI JUNICHI
IPC分类号： G10L15/20 , G10L15/02 , G10L21/02 , G10L21/06 , G10L3/02 , G10L7/10 , G10L9/16
摘要： PURPOSE:To provide a voice recognition device which emits the recognition result of high calculating accuracy at a high speed. CONSTITUTION:A voice signal division sensing part 3 senses the voice signal division on the basis of a characteristical quantity of information from an acoustic input signal, and an analytical processing part 4 calculates the mean of a self-correlation factor due to a short time analysis of the voice signal division a time series LPC kepstrum factor determined from it, and an LPC kepstorum factor in the voice signal division. A kepstorum factor subtracting part 5 subtracts the mean 4 of LPC kepstrum factors from the time series LPC kepstorum factor 4 of voice signal, and a standard voice pattern accumulation part 7 accumulates the result from the processing made by the analytical part 4 and subtracting part 5 about the voice having known contents of voice emission, and the voice pattern prepared about the fed voice of unknown contents of voice emission is put in reference to the standard voice pattern.

6. 发明专利

JPH07111534A VOICE DIALING DEVICE 失效
公开(公告)号：JPH07111534A
公开(公告)日：1995-04-25
申请号：JP25581893
申请日：1993-10-13
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIDA MIZUHIRO
IPC分类号： H04M3/42
摘要： PURPOSE:To provide a voice dialing device which protects the personal information on a specific speaker from other persons and can be instantaneously used by an unspecific speaker in relation to a general opposite party. CONSTITUTION:A voice dialing device recognizes the voices of a speaker and transmits a dial signal. An area 15 is prepared for the dialing device to store the standard pattern of the opposite party that is produced from the data by which the voice features of an unspecific speaker are extracted, the telephone number of the corresponding opposite party and its abbreviated number. Then a storing medium part 2 is prepared independently of a voice dialing device main body part 1 to store the standard pattern of the opposite party produced from the data by which the voice features of a specific speaker are extracted, the telephone number of the corresponding opposite party and its abbreviated number. Then the independent part 2 is connected to the part 1 so that only the specific speaker himself stored in the part 2 can change the voice dialing device into an available state in relation to the information contents stored in the part 2.

7. 发明专利

JPH0635497A SPEECH INPUT DEVICE 失效
公开(公告)号：JPH0635497A
公开(公告)日：1994-02-10
申请号：JP21070292
申请日：1992-07-16
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIDA MIZUHIRO , SUZUKI YOSHITAKE
IPC分类号： G06F3/16 , G10L11/02 , G10L15/04 , G10L15/22 , G10L15/28 , G10L3/00
摘要： PURPOSE:To obtain recognition performance which is practically sufficient and improve a human-machine interface by deciding whether or not voicing is urged according to the measurement result of an ambient noise level and informing a user by a speech guidance. CONSTITUTION:When an indication for the start of speech input is sent to a controller 2, a guidance speech output part 3 outputs a guidance 'Speak please.' from a speaker 5 and the controller 2 makes a noise speech level measurement pare 4 measures the ambient noise level at the end of the guidance. The measurement result is displayed at a level display part 6 and when its value exceeds a previously set threshold value, the guidance speech output part 3 outputs a guidance 'The noise level is too high. Wait a moment please'. When the measured value is less than the threshold value, a guidance 'Speak please.' is outputted and the processing of speech recognition is started.

8. 发明专利

JPH04347898A VOICE RECOGNIZING METHOD 失效
公开(公告)号：JPH04347898A
公开(公告)日：1992-12-03
申请号：JP12032091
申请日：1991-05-24
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIDA MIZUHIRO
IPC分类号： G10L15/20 , G10L11/02 , G10L15/04 , G10L15/06 , G10L21/02
摘要： PURPOSE:To improve the recognition rate in noisy environment. CONSTITUTION:A voice section is detected as a reference voice Csij from voice data obtained by voicing a word set of words to be recognized in noiseless environment at plural voicing levels and the voice section and its time averaged level are stored in a storage part 16 previously; and a voice section detection part 12 detects a voice section and a noise section from input test voice data and their time averaged levels Pt and Pn and a level control part 17 controls the level of each reference voice to Pt/Pn. A detected noise is superposed, a detection part 24 detects a voice section from the noise superposed voice, and a standard pattern generation part 25 generates a standard pattern; and the standard pattern of the noise superposed voice and collated by a collation part 27 with the pattern of the voice section detected from the input test voice data as to each voice level and a close standard pattern is outputted as a recognized voice.

9. 发明专利

JPH01233943A HANDSET TYPE SOUND RECEIVER 失效
公开(公告)号：JPH01233943A
公开(公告)日：1989-09-19
申请号：JP5942388
申请日：1988-03-15
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIDA MIZUHIRO
IPC分类号： H04M1/03
摘要： PURPOSE:To attain realization of a handset type sound receiver having a desired sensitivity frequency characteristic over a wide frequency band by providing a prescribed gap to a joint between a receiver whose rear face is opened and a handset case to constitute the acoustic vibration system by a resistance control system. CONSTITUTION:The receiver 1 whose rear face is opened while employing a diaphragm 1-1 having a fundamental resonance frequency f0 of 230Hz and equivalent stiffness S0 of 1.8X10 (dyn/cm) is used, and when it is desired to extend the sensitivity frequency characteristic up to the low frequency range flat, the gap 5-1 of the joint between a handset 2 and the receiver 1 is decreased, but when the sound quality emphasizing a high frequency region is desired, the gap 5-1 is set larger. Thus, the addition of an electric equalizer for sound quality adjustment is not required.

10. 发明专利

JPS63144698A MICROPHONE SWITCHING AND SOUND COLLECTING DEVICE 失效
公开(公告)号：JPS63144698A
公开(公告)日：1988-06-16
申请号：JP29061786
申请日：1986-12-08
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： HIDA MIZUHIRO , OIKAWA HIROSHI , NISHINO MASAKAZU
IPC分类号： H04R3/00
摘要： PURPOSE:To achieve an excellent sound collecting performance even if the location of a sound source is unspecified by comparing the magnitudes of outputs from microphones disposed in isolation, and selecting the largest output from among them. CONSTITUTION:When change-over switches 12, 13 are set at connecting positions 12a, 13c, the output of the microphones(mike) 11a, 11c are inputted to a comparator 15 as signal levels X1, X3 respectively through A/D converters 14a, 14b, where they are compared with each other. IN case X1

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