SG59893G - An adaptive multivariate estimating apparatus - Google Patents

An adaptive multivariate estimating apparatus

Info

Publication number
SG59893G
SG59893G SG598/93A SG59893A SG59893G SG 59893 G SG59893 G SG 59893G SG 598/93 A SG598/93 A SG 598/93A SG 59893 A SG59893 A SG 59893A SG 59893 G SG59893 G SG 59893G
Authority
SG
Singapore
Prior art keywords
classifiers
statistical
unvoiced
weights
frame
Prior art date
Application number
SG598/93A
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 SG59893G publication Critical patent/SG59893G/en

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
    • 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

Abstract

Apparatus for detecting a fundamental frequency in speech in a changing speech environment by using adaptive statistical techniques. A statistical voice detector (103) detects changes in the voice environment by classifiers that define certain attributes of the speech to recalculate weights that are used to combine the classifiers in making the unvoiced/voiced decision that specifies whether the speech has a fundamental frequency or not. The detector is responsive to classifiers to first calculate the average of the classifiers (202) and then to determine the overall probability that any frame will be unvoiced. In addition, the detector using a statistical calculator (203) forms two vectors, one vector represents the statistical average of values that an unvoiced frame's classifiers would have and the other vector represents the statistical average of the values of the classifiers for a voiced frame. These latter calculations are performed utilizing not only the average value of the classifiers and present classifiers but also a vector defining the weights that are utilized to determine whether a frame is unvoiced or not plus a threshold value. A weights calculator (204) is responsive to the information generated in the statistical calculations to generate a new set of values for the weights vector and the threshold value which are utilized by the statistical calculator during the next frame. An unvoiced/voiced determinator (205) then is reponsive to the two statistical average vectors and the weights vector to make the unvoiced/voiced decision.
SG598/93A 1987-04-03 1993-05-07 An adaptive multivariate estimating apparatus SG59893G (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US3429687A 1987-04-03 1987-04-03
PCT/US1988/000030 WO1988007738A1 (en) 1987-04-03 1988-01-12 An adaptive multivariate estimating apparatus

Publications (1)

Publication Number Publication Date
SG59893G true SG59893G (en) 1993-07-09

Family

ID=21875521

Family Applications (1)

Application Number Title Priority Date Filing Date
SG598/93A SG59893G (en) 1987-04-03 1993-05-07 An adaptive multivariate estimating apparatus

Country Status (9)

Country Link
EP (1) EP0308433B1 (en)
JP (1) JPH01502779A (en)
AT (1) ATE82426T1 (en)
AU (1) AU599459B2 (en)
CA (2) CA1337708C (en)
DE (1) DE3875894T2 (en)
HK (1) HK106693A (en)
SG (1) SG59893G (en)
WO (1) WO1988007738A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3876569T2 (en) * 1987-04-03 1993-04-08 American Telephone & Telegraph DETECTOR FOR TUNING LOUD WITH ADAPTIVE THRESHOLD.
JP3277398B2 (en) * 1992-04-15 2002-04-22 ソニー株式会社 Voiced sound discrimination method
US6202046B1 (en) 1997-01-23 2001-03-13 Kabushiki Kaisha Toshiba Background noise/speech classification method
JP3670217B2 (en) 2000-09-06 2005-07-13 国立大学法人名古屋大学 Noise encoding device, noise decoding device, noise encoding method, and noise decoding method
JP4517045B2 (en) * 2005-04-01 2010-08-04 独立行政法人産業技術総合研究所 Pitch estimation method and apparatus, and pitch estimation program
CN104517614A (en) * 2013-09-30 2015-04-15 上海爱聊信息科技有限公司 Voiced/unvoiced decision device and method based on sub-band characteristic parameter values

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3876569T2 (en) * 1987-04-03 1993-04-08 American Telephone & Telegraph DETECTOR FOR TUNING LOUD WITH ADAPTIVE THRESHOLD.

Also Published As

Publication number Publication date
EP0308433A1 (en) 1989-03-29
HK106693A (en) 1993-10-15
AU1222688A (en) 1988-11-02
WO1988007738A1 (en) 1988-10-06
AU599459B2 (en) 1990-07-19
EP0308433B1 (en) 1992-11-11
CA1338251C (en) 1996-04-16
ATE82426T1 (en) 1992-11-15
JPH0795237B1 (en) 1995-10-11
CA1337708C (en) 1995-12-05
DE3875894D1 (en) 1992-12-17
DE3875894T2 (en) 1993-05-19
JPH01502779A (en) 1989-09-21

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