CA2056110A1 - Public address intelligibility system - Google Patents

Public address intelligibility system

Info

Publication number
CA2056110A1
CA2056110A1 CA2056110A CA2056110A CA2056110A1 CA 2056110 A1 CA2056110 A1 CA 2056110A1 CA 2056110 A CA2056110 A CA 2056110A CA 2056110 A CA2056110 A CA 2056110A CA 2056110 A1 CA2056110 A1 CA 2056110A1
Authority
CA
Canada
Prior art keywords
formants
voice
intelligibility
processed
amplifying
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
CA2056110A
Other languages
French (fr)
Other versions
CA2056110C (en
Inventor
Arnold I. Klayman
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.)
DTS LLC
Original Assignee
Hughes Aircraft Co
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
Application filed by Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of CA2056110A1 publication Critical patent/CA2056110A1/en
Application granted granted Critical
Publication of CA2056110C publication Critical patent/CA2056110C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G10L15/02—Feature extraction for speech recognition; Selection of recognition unit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R27/00—Public address systems
    • 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
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility

Abstract

Intelligibility of a human voice projected by a loudspeaker in an environment of high ambient noise is enhanced by amplifying formants (26, 28, 30) of the voice.
Because intelligibility of the human voice is derived largely from the pattern of frequency distribution of voice formants, selective enhancement of the formants provides much more readily understandable speech in the presence of high background noise with but minimal increase in amplitude of the speech. Formants are processed by individually selecting them in a spectrum analyzer (42, 124) and individually amplifying (50, 58, 74, 80, 140 through 146) and selectively weighting (56, 57, 78, 82) them before recombining processed formants and unprocessed base band voice components (130) to provide an output signal (116) of greatly improved intelligibility.
CA002056110A 1991-03-27 1991-11-25 Public address intelligibility system Expired - Fee Related CA2056110C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67603791A 1991-03-27 1991-03-27
US676,037 1991-03-27

Publications (2)

Publication Number Publication Date
CA2056110A1 true CA2056110A1 (en) 1992-09-28
CA2056110C CA2056110C (en) 1997-02-04

Family

ID=24712968

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002056110A Expired - Fee Related CA2056110C (en) 1991-03-27 1991-11-25 Public address intelligibility system

Country Status (11)

Country Link
US (1) US5459813A (en)
EP (1) EP0505645B1 (en)
JP (1) JP3151459B2 (en)
KR (1) KR950013557B1 (en)
CN (1) CN1041266C (en)
CA (1) CA2056110C (en)
DE (1) DE69131095T2 (en)
ES (1) ES2133281T3 (en)
HK (1) HK1003305A1 (en)
IL (1) IL100174A (en)
MX (1) MX9102610A (en)

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Also Published As

Publication number Publication date
EP0505645A1 (en) 1992-09-30
IL100174A0 (en) 1992-08-18
CA2056110C (en) 1997-02-04
KR950013557B1 (en) 1995-11-08
CN1065370A (en) 1992-10-14
DE69131095D1 (en) 1999-05-12
HK1003305A1 (en) 1998-10-23
US5459813A (en) 1995-10-17
MX9102610A (en) 1994-06-30
JPH04328798A (en) 1992-11-17
KR920018650A (en) 1992-10-22
ES2133281T3 (en) 1999-09-16
DE69131095T2 (en) 1999-09-23
IL100174A (en) 1997-09-30
JP3151459B2 (en) 2001-04-03
CN1041266C (en) 1998-12-16
EP0505645B1 (en) 1999-04-07

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