AU1700788A - An adaptive threshold voiced detector - Google Patents

An adaptive threshold voiced detector

Info

Publication number
AU1700788A
AU1700788A AU17007/88A AU1700788A AU1700788A AU 1700788 A AU1700788 A AU 1700788A AU 17007/88 A AU17007/88 A AU 17007/88A AU 1700788 A AU1700788 A AU 1700788A AU 1700788 A AU1700788 A AU 1700788A
Authority
AU
Australia
Prior art keywords
discriminant
values
unvoiced
frame
voiced
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
AU17007/88A
Other versions
AU598933B2 (en
Inventor
David Lynn Thomson
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of AU1700788A publication Critical patent/AU1700788A/en
Application granted granted Critical
Publication of AU598933B2 publication Critical patent/AU598933B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/93—Discriminating between voiced and unvoiced parts of speech signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Radio Relay Systems (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Apparatus for detecting a fundamental frequency in speech by statistically analyzing a discriminant variable generated by a discriminant voiced detector (102) so as to determine the presence of the fundamental frequency in a changing speech environment. A statistical calculator (103) is responsive to the discriminant variable to first calculate the average of all of the values of the discriminant variable over the present and past speech frames and then to determine the overall probability that any frame will be unvoiced. In addition, the calculator informs two values, one value represents the statistical average of discriminant values that an unvoiced frame's discriminant variable would have and the other value represents the statistical average of the discriminant values for voice frames. These latter calculations are performed utilizing not only the average discriminant value but also a weight value and a threshold value which are adaptively determined by a threshold calculator (104) from frame to frame. An unvoiced/voiced determinator (105) makes the unvoiced/voiced decision by utilizing the weight and threshold values.
AU17007/88A 1987-04-03 1988-01-12 An adaptive threshold voiced detector Ceased AU598933B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3429887A 1987-04-03 1987-04-03
US034298 1987-04-03

Publications (2)

Publication Number Publication Date
AU1700788A true AU1700788A (en) 1988-11-02
AU598933B2 AU598933B2 (en) 1990-07-05

Family

ID=21875533

Family Applications (1)

Application Number Title Priority Date Filing Date
AU17007/88A Ceased AU598933B2 (en) 1987-04-03 1988-01-12 An adaptive threshold voiced detector

Country Status (9)

Country Link
EP (1) EP0309561B1 (en)
JP (1) JPH0795239B2 (en)
AT (1) ATE83329T1 (en)
AU (1) AU598933B2 (en)
CA (1) CA1336208C (en)
DE (1) DE3876569T2 (en)
HK (1) HK21794A (en)
SG (1) SG60993G (en)
WO (1) WO1988007739A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU599459B2 (en) * 1987-04-03 1990-07-19 American Telephone And Telegraph Company An adaptive multivariate estimating apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5195138A (en) * 1990-01-18 1993-03-16 Matsushita Electric Industrial Co., Ltd. Voice signal processing device
US5204906A (en) * 1990-02-13 1993-04-20 Matsushita Electric Industrial Co., Ltd. Voice signal processing device
EP0459384B1 (en) * 1990-05-28 1998-12-30 Matsushita Electric Industrial Co., Ltd. Speech signal processing apparatus for cutting out a speech signal from a noisy speech signal

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60114900A (en) * 1983-11-25 1985-06-21 松下電器産業株式会社 Voice/voiceless discrimination
JPS60200300A (en) * 1984-03-23 1985-10-09 松下電器産業株式会社 Voice head/end detector
JPS6148898A (en) * 1984-08-16 1986-03-10 松下電器産業株式会社 Voice/voiceless discriminator for voice
EP0308433B1 (en) * 1987-04-03 1992-11-11 AT&T Corp. An adaptive multivariate estimating apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU599459B2 (en) * 1987-04-03 1990-07-19 American Telephone And Telegraph Company An adaptive multivariate estimating apparatus

Also Published As

Publication number Publication date
JPH0795239B2 (en) 1995-10-11
HK21794A (en) 1994-03-18
DE3876569D1 (en) 1993-01-21
AU598933B2 (en) 1990-07-05
DE3876569T2 (en) 1993-04-08
JPH01502858A (en) 1989-09-28
ATE83329T1 (en) 1992-12-15
WO1988007739A1 (en) 1988-10-06
CA1336208C (en) 1995-07-04
EP0309561B1 (en) 1992-12-09
EP0309561A1 (en) 1989-04-05
SG60993G (en) 1993-07-09

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Legal Events

Date Code Title Description
MK14 Patent ceased section 143(a) (annual fees not paid) or expired