CA2049173A1 - Speech recognition apparatus - Google Patents

Speech recognition apparatus

Info

Publication number
CA2049173A1
CA2049173A1 CA2049173A CA2049173A CA2049173A1 CA 2049173 A1 CA2049173 A1 CA 2049173A1 CA 2049173 A CA2049173 A CA 2049173A CA 2049173 A CA2049173 A CA 2049173A CA 2049173 A1 CA2049173 A1 CA 2049173A1
Authority
CA
Canada
Prior art keywords
seat
speech recognition
detecting
microphones
command
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2049173A
Other languages
French (fr)
Other versions
CA2049173C (en
Inventor
Shoji Fujimoto
Kazuya Sako
Minoru Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Ten Ltd
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2214953A external-priority patent/JPH0652477B2/en
Priority claimed from JP2238877A external-priority patent/JPH0756596B2/en
Application filed by Individual filed Critical Individual
Publication of CA2049173A1 publication Critical patent/CA2049173A1/en
Application granted granted Critical
Publication of CA2049173C publication Critical patent/CA2049173C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/037—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for occupant comfort, e.g. for automatic adjustment of appliances according to personal settings, e.g. seats, mirrors, steering wheel
    • B60R16/0373—Voice control
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/26—Speech to text systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/005—Circuits for transducers, loudspeakers or microphones for combining the signals of two or more microphones
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02161—Number of inputs available containing the signal or the noise to be suppressed
    • G10L2021/02166—Microphone arrays; Beamforming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Abstract

This invention relates to a speech recognition apparatus used in a vehicle. The speech recognition apparatus includes microphones, a speech recognition means for recognizing a voice command from the microphones, an in-phase component detecting means for detecting an in-phase component of voice signals from the microphones positioned symmetrically with respect to a driving seat, to obtain a command generated at the driving seat, a phase shift and in-phase component detecting means for detecting an in-phase component after shifting a certain amount of a voice signal phase from the microphones positioned asymmetrically with respect to passenger seats, to thereby obtain the same phase shifts and a command generated at the passenger seats, a command seat discriminating means for comparing an output level of the in-phase component detecting and the phase shift and in-phase component detecting means to discriminate at which seat a command is generated among several seats, a detecting means for detecting a validity and invalidity of commands resulting from speech obtained from outputs of the speech recognition means and command seat discriminating means to thereby control various equipment.
Also, the plurality of microphones are separated from each other to input voice commands generated at each seat in the vehicle, and the speech recognition apparatus comprises a phase shift means for shifting a predetermined amount of phases of electric signals through the microphones with the same phase shift relative to each seat, an adding means for adding output signals of the phase shift means corresponding to each seat, a maximum amplitude signal detecting means for detecting a maximum amplitude signal of output signals of each adding means as voice commands and outputting same to the speech recognition means.
Therefore, commands from the driver seat and the passenger seats are discriminated with a high reliability and the speech recognition rate in a noisy vehicle room is enhanced.
CA002049173A 1990-08-16 1991-08-14 Speech recognition apparatus Expired - Fee Related CA2049173C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2214953A JPH0652477B2 (en) 1990-08-16 1990-08-16 Voice recognizer
JP2-214953 1990-08-16
JP2238877A JPH0756596B2 (en) 1990-09-11 1990-09-11 Voice recognizer
JP2-238877 1990-09-11

Publications (2)

Publication Number Publication Date
CA2049173A1 true CA2049173A1 (en) 1992-02-17
CA2049173C CA2049173C (en) 1996-06-25

Family

ID=26520607

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002049173A Expired - Fee Related CA2049173C (en) 1990-08-16 1991-08-14 Speech recognition apparatus

Country Status (4)

Country Link
US (1) US5214707A (en)
EP (1) EP0472356B1 (en)
CA (1) CA2049173C (en)
DE (1) DE69101527T2 (en)

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Also Published As

Publication number Publication date
DE69101527T2 (en) 1994-07-14
DE69101527D1 (en) 1994-05-05
EP0472356B1 (en) 1994-03-30
CA2049173C (en) 1996-06-25
US5214707A (en) 1993-05-25
EP0472356A1 (en) 1992-02-26

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Effective date: 20100816