EP0334023A3 - Method for speech signals detection - Google Patents

Method for speech signals detection Download PDF

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Publication number
EP0334023A3
EP0334023A3 EP19890102876 EP89102876A EP0334023A3 EP 0334023 A3 EP0334023 A3 EP 0334023A3 EP 19890102876 EP19890102876 EP 19890102876 EP 89102876 A EP89102876 A EP 89102876A EP 0334023 A3 EP0334023 A3 EP 0334023A3
Authority
EP
European Patent Office
Prior art keywords
signal
speech
detection
signals
microphone
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.)
Withdrawn
Application number
EP19890102876
Other languages
German (de)
French (fr)
Other versions
EP0334023A2 (en
Inventor
Hans Wilhelm Dipl.-Ing. Gierlich
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.)
Telenorma GmbH
Original Assignee
Telenorma Telefonbau und Normalzeit GmbH
Telenorma GmbH
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 Telenorma Telefonbau und Normalzeit GmbH, Telenorma GmbH filed Critical Telenorma Telefonbau und Normalzeit GmbH
Publication of EP0334023A2 publication Critical patent/EP0334023A2/en
Publication of EP0334023A3 publication Critical patent/EP0334023A3/en
Withdrawn legal-status Critical Current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
    • 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

Abstract

Bei bekannten Erkennungsschaltungen für Sprachsignale wird nach einer Bandpaßfilterung für die Sprachgrundfrequenz des Mikrofonsignals die Einhüllende von Sprache desselben detektiert und das Detektionssignal zur Steuerung eines Regelverstärkers derart verwendet, daß dieser bei fehlendem Detektionssignal das Mikrofonsignal dämpft und bei vorhandenem Detektionssignal verstärkt. Ein derartiges Verfahren hat eine Detektionszeit zur Folge, die in einer Größenordnung von 200 ms liegt. Durch das neue Verfahren soll eine kürzere Detektionszeit erreicht werden. In known detection circuits for speech signals after a bandpass filtering for the fundamental speech frequency of the Microphone signal detected the envelope of speech of the same and the detection signal for controlling a control amplifier used such that this in the absence of a detection signal attenuates the microphone signal and if the detection signal is present reinforced. Such a method has a detection time Sequence that is on the order of 200 ms. By the new methods, a shorter detection time should be achieved.

Dies geschieht dadurch, daß die am Ausgang des Tiefpaßfilters auf­ tretenden Signale auf Amplitude und Dauer einer bestimmten Ampli­ tude überprüft werden und daß dann ein Sprachsignal erkannt wird, wenn mindestens drei aufeinanderfolgende Amplituden im Bereich der Sprachgrundfrequenz aufgetreten sind. This happens because the at the output of the low-pass filter occurring signals on the amplitude and duration of a certain ampli tude are checked and then that a speech signal is recognized, if at least three consecutive amplitudes in the range the basic speech frequency has occurred.

Die Erkennung von Sprachsignalen kann besonders in Verbindung mit einem Signalprozessor zur Verstärkungsregelung von Mikrofon­ signalen in störgeräuscherfüllter Umgebung erfolgen, wobei nur bei Vorliegen von Sprachsignalen eine Verstärkung stattfindet oder auch bei Wechselsprech- oder Gegensprechanlagen angewendet werden, um bei Vorliegen eines Sprachsignals das Signal in der betreffenden Richtung zu verstärken und in der Gegenrichtung zu dämpfen. The detection of voice signals can be particularly related with a signal processor for gain control of the microphone signals occur in a noisy environment, but only when speech signals are present, amplification takes place or also used in intercom or intercom systems be to the signal in the presence of a speech signal reinforce the direction in question and in the opposite direction to dampen.

EP19890102876 1988-03-25 1989-02-20 Method for speech signals detection Withdrawn EP0334023A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3810068 1988-03-25
DE19883810068 DE3810068A1 (en) 1988-03-25 1988-03-25 METHOD FOR DETECTING VOICE SIGNALS

Publications (2)

Publication Number Publication Date
EP0334023A2 EP0334023A2 (en) 1989-09-27
EP0334023A3 true EP0334023A3 (en) 1991-02-06

Family

ID=6350648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890102876 Withdrawn EP0334023A3 (en) 1988-03-25 1989-02-20 Method for speech signals detection

Country Status (2)

Country Link
EP (1) EP0334023A3 (en)
DE (1) DE3810068A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315688A (en) * 1990-09-21 1994-05-24 Theis Peter F System for recognizing or counting spoken itemized expressions
US5822726A (en) * 1995-01-31 1998-10-13 Motorola, Inc. Speech presence detector based on sparse time-random signal samples
SE503875C2 (en) * 1995-06-19 1996-09-23 Tore Fjaellbrandt Method and apparatus for determining a pitch frequency in a speech signal
FI991132A (en) * 1999-05-18 2000-11-19 Voxlab Oy The method is to investigate the rhythmicity of a digital signal formed from samples
DE10321625B4 (en) * 2003-05-13 2007-08-23 Gehrke Kommunikationssyteme Gmbh Signal transmission device and method for regulating a signal transmission device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751602A (en) * 1971-08-13 1973-08-07 Bell Telephone Labor Inc Loudspeaking telephone
FR2380612A1 (en) * 1977-02-09 1978-09-08 Thomson Csf SPEECH SIGNAL DISCRIMINATION DEVICE AND ALTERNATION SYSTEM INCLUDING SUCH A DEVICE
EP0120325A1 (en) * 1983-03-01 1984-10-03 Alcatel N.V. Circuit arrangement for a hands free telephone

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513260A (en) * 1967-10-13 1970-05-19 Ibm Speech presence detector
US4484344A (en) * 1982-03-01 1984-11-20 Rockwell International Corporation Voice operated switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751602A (en) * 1971-08-13 1973-08-07 Bell Telephone Labor Inc Loudspeaking telephone
FR2380612A1 (en) * 1977-02-09 1978-09-08 Thomson Csf SPEECH SIGNAL DISCRIMINATION DEVICE AND ALTERNATION SYSTEM INCLUDING SUCH A DEVICE
EP0120325A1 (en) * 1983-03-01 1984-10-03 Alcatel N.V. Circuit arrangement for a hands free telephone

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
ELECTRONICS LETTERS, Band 14, Nr. 4, 16. Febrar 1978, Seiten 109-110, Hitchin, GB; N.R. MALIK et al.: "Adaptive instantaneous pitch detector with microcomputer error correction" *
ELEKTRONIK, Band 36, Nr. 22, 30. Oktober 1987, Seiten 87-90, München, DE; C. DESAI: "Frei sprechen ohne Rückkopplung" *
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS, Band 34, Nr. 3, August 1988, Seiten 824-833, New York, US; M. GOTO et al.: "Microprocessor based English speech training system" *
N.T.I.S. TECHN. NOTES, Juni 1988, Seite 450, Springfield, US; "Pitch-learning algorithm for speech encoders" *
THE JOURNAL OF ACOUSTICAL SOCIETY OF AMERICA, Band 46, Nr. 2, Teil 2, 1969, Seiten 442-448, New York, US; B. GOLD et al.: "Parallel processing techniques for estimating pitch periods of speech in the time domain" *

Also Published As

Publication number Publication date
EP0334023A2 (en) 1989-09-27
DE3810068C2 (en) 1990-01-11
DE3810068A1 (en) 1989-10-05

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