HK21794A - An adaptive threshold voiced detector - Google Patents

An adaptive threshold voiced detector

Info

Publication number
HK21794A
HK21794A HK217/94A HK21794A HK21794A HK 21794 A HK21794 A HK 21794A HK 217/94 A HK217/94 A HK 217/94A HK 21794 A HK21794 A HK 21794A HK 21794 A HK21794 A HK 21794A
Authority
HK
Hong Kong
Prior art keywords
discriminant
values
unvoiced
frame
voiced
Prior art date
Application number
HK217/94A
Inventor
David Lynn Thomson
Original Assignee
American Telephone & Telegraph
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 & Telegraph filed Critical American Telephone & Telegraph
Publication of HK21794A publication Critical patent/HK21794A/en

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)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computational Linguistics (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Radio Relay Systems (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.
HK217/94A 1987-04-03 1994-03-10 An adaptive threshold voiced detector HK21794A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3429887A 1987-04-03 1987-04-03
PCT/US1988/000031 WO1988007739A1 (en) 1987-04-03 1988-01-12 An adaptive threshold voiced detector

Publications (1)

Publication Number Publication Date
HK21794A true HK21794A (en) 1994-03-18

Family

ID=21875533

Family Applications (1)

Application Number Title Priority Date Filing Date
HK217/94A HK21794A (en) 1987-04-03 1994-03-10 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)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0308433B1 (en) * 1987-04-03 1992-11-11 AT&T Corp. An adaptive multivariate estimating apparatus
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
DE69130687T2 (en) * 1990-05-28 1999-09-09 Matsushita Electric Industrial Co. Speech signal processing device 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

Also Published As

Publication number Publication date
EP0309561B1 (en) 1992-12-09
EP0309561A1 (en) 1989-04-05
DE3876569T2 (en) 1993-04-08
AU1700788A (en) 1988-11-02
ATE83329T1 (en) 1992-12-15
AU598933B2 (en) 1990-07-05
CA1336208C (en) 1995-07-04
DE3876569D1 (en) 1993-01-21
JPH01502858A (en) 1989-09-28
JPH0795239B2 (en) 1995-10-11
WO1988007739A1 (en) 1988-10-06
SG60993G (en) 1993-07-09

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)