JPS5781733A - Method and means for detecting voice in voice channel signal - Google Patents

Method and means for detecting voice in voice channel signal

Info

Publication number
JPS5781733A
JPS5781733A JP56140449A JP14044981A JPS5781733A JP S5781733 A JPS5781733 A JP S5781733A JP 56140449 A JP56140449 A JP 56140449A JP 14044981 A JP14044981 A JP 14044981A JP S5781733 A JPS5781733 A JP S5781733A
Authority
JP
Japan
Prior art keywords
detector
magnitude
sample
speech
produces
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
JP56140449A
Other languages
Japanese (ja)
Other versions
JPH0311139B2 (en
Inventor
Dabuuru Fuado
Ru Buan Teiu
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
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 Northern Telecom Ltd filed Critical Northern Telecom Ltd
Publication of JPS5781733A publication Critical patent/JPS5781733A/en
Publication of JPH0311139B2 publication Critical patent/JPH0311139B2/ja
Granted 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
    • G10L25/78—Detection of presence or absence of voice 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)
  • Time-Division Multiplex Systems (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

In a digital speech detector, a first detector (601) produces an output signal if any sample of a voice channel signal has a magnitude (T) exceeding a fixed threshold (TF) above noise levels. A second detector (602) produces a second threshold (TL) which is adaptively adjusted to noise levels on the channel by being set to a level above the current sample magnitude (T) each time that this does not exceed the preceding sample's magnitude (TP). When the sample magnitude (T) rises above the second threshold (TL), and for each subsequent sample of successively increasing magnitude, the second detector (602) produces an output signal. A speech decision for the voice channel is reached if either detector (601, 602) produces its output signal. The output signals of the first and second detectors (601,602) are maintained for fixed and variable, respectively, hangover periods to maintain the speech decision during intersyllabic pauses in speech. The samples are supplied to the speech detector by an offset remover and averaging circuit.
JP56140449A 1980-09-09 1981-09-08 Method and means for detecting voice in voice channel signal Granted JPS5781733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000359968A CA1147071A (en) 1980-09-09 1980-09-09 Method of and apparatus for detecting speech in a voice channel signal

Publications (2)

Publication Number Publication Date
JPS5781733A true JPS5781733A (en) 1982-05-21
JPH0311139B2 JPH0311139B2 (en) 1991-02-15

Family

ID=4117844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56140449A Granted JPS5781733A (en) 1980-09-09 1981-09-08 Method and means for detecting voice in voice channel signal

Country Status (4)

Country Link
EP (1) EP0047589B1 (en)
JP (1) JPS5781733A (en)
CA (1) CA1147071A (en)
DE (1) DE3164171D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS619700A (en) * 1984-06-25 1986-01-17 シャープ株式会社 Voice feature extraction system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1137240A (en) * 1980-09-09 1982-12-07 Northern Telecom Limited Method of and apparatus for echo detection in voice channel signals
EP0092611B1 (en) * 1982-04-27 1987-07-08 Koninklijke Philips Electronics N.V. Speech analysis system
DE3243231A1 (en) * 1982-11-23 1984-05-24 Philips Kommunikations Industrie AG, 8500 Nürnberg METHOD FOR DETECTING VOICE BREAKS
EP0140249B1 (en) * 1983-10-13 1988-08-10 Texas Instruments Incorporated Speech analysis/synthesis with energy normalization
GB2379148A (en) * 2001-08-21 2003-02-26 Mitel Knowledge Corp Voice activity detection

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712959A (en) * 1969-07-14 1973-01-23 Communications Satellite Corp Method and apparatus for detecting speech signals in the presence of noise
US4052568A (en) * 1976-04-23 1977-10-04 Communications Satellite Corporation Digital voice switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS619700A (en) * 1984-06-25 1986-01-17 シャープ株式会社 Voice feature extraction system

Also Published As

Publication number Publication date
DE3164171D1 (en) 1984-07-19
EP0047589A1 (en) 1982-03-17
CA1147071A (en) 1983-05-24
JPH0311139B2 (en) 1991-02-15
EP0047589B1 (en) 1984-06-13

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