ES2136204T3 - Detector de actividad vocal. - Google Patents

Detector de actividad vocal.

Info

Publication number
ES2136204T3
ES2136204T3 ES94926317T ES94926317T ES2136204T3 ES 2136204 T3 ES2136204 T3 ES 2136204T3 ES 94926317 T ES94926317 T ES 94926317T ES 94926317 T ES94926317 T ES 94926317T ES 2136204 T3 ES2136204 T3 ES 2136204T3
Authority
ES
Spain
Prior art keywords
updating
noise
activity detector
input
vocal activity
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.)
Expired - Lifetime
Application number
ES94926317T
Other languages
English (en)
Inventor
Paul Alexander Barrett
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27235491&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2136204(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from GB939324967A external-priority patent/GB9324967D0/en
Priority claimed from GB9412451A external-priority patent/GB9412451D0/en
Application filed by British Telecommunications PLC filed Critical British Telecommunications PLC
Application granted granted Critical
Publication of ES2136204T3 publication Critical patent/ES2136204T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current
    • 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
    • G10L25/84—Detection of presence or absence of voice signals for discriminating voice from noise
    • 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
    • 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
    • G10L2025/783—Detection of presence or absence of voice signals based on threshold decision
    • G10L2025/786—Adaptive threshold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations

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)
  • Computer Networks & Wireless Communication (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Telephone Function (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Radio Relay Systems (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
  • Electromechanical Clocks (AREA)
  • Cosmetics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Measuring Fluid Pressure (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

EL HABLA SE DISTINGUE DEL RUIDO MEDIANTE UNA COMPARACION ESPECTRAL (114, 115) DE UNA SEÑAL DE ENTRADA CON UNA ESTIMACION DE RUIDO ALMACENADA (113). LA ACTUALIZACION DE LA ESTIMACION DE RUIDO (EN UNA MEMORIA INTERMEDIA (113)) SE PERMITE DURANTE LOS PERIODOS EN LOS QUE LA VOZ ESTA AUSENTE BAJO EL CONTROL DE UN DETECTOR AUXILIAR (200). PARA MEJORAR EL FUNCIONAMIENTO EN PRESENCIA DE SEÑALES CON COMPONENTES ARMONICOS FUERTES (POR EJEMPLO TONOS DE SEÑALIZACION) SE CALCULA UNA GANANCIA DE PREDICCION LPC A PARTIR DE LA ENTRADA (X(I)) Y UN RESIDUAL (Y(I)) OBTENIDOS DE LA ENTRADA QUE SIGUE AL FILTRADO MEDIANTE UN FILTRO (105) QUE TIENE UNA RESPUESTA COMPLEMENTARIA AL ESPECTRO DE FRECUENCIA DE LA ENTRADA, Y SI LA GANANCIA EXCEDE DE UN VALOR PREDETERMINADO, SE SUPRIME LA ACTUALIZACION.
ES94926317T 1993-09-14 1994-09-14 Detector de actividad vocal. Expired - Lifetime ES2136204T3 (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP93307211 1993-09-14
GB939324967A GB9324967D0 (en) 1993-12-06 1993-12-06 Voice activity detector
GB9412451A GB9412451D0 (en) 1994-06-21 1994-06-21 Voice activity detector

Publications (1)

Publication Number Publication Date
ES2136204T3 true ES2136204T3 (es) 1999-11-16

Family

ID=27235491

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94926317T Expired - Lifetime ES2136204T3 (es) 1993-09-14 1994-09-14 Detector de actividad vocal.

Country Status (23)

Country Link
US (2) US5749067A (es)
EP (1) EP0719439B1 (es)
JP (1) JP3224132B2 (es)
KR (1) KR100363309B1 (es)
CN (1) CN1064772C (es)
AT (1) ATE182420T1 (es)
BR (1) BR9407535A (es)
CA (1) CA2169745C (es)
CZ (1) CZ286743B6 (es)
DE (1) DE69419615T2 (es)
DK (1) DK0719439T3 (es)
ES (1) ES2136204T3 (es)
FI (1) FI118195B (es)
GR (1) GR3031515T3 (es)
HK (1) HK1014392A1 (es)
HU (1) HU219994B (es)
IN (1) IN184794B (es)
MY (1) MY111134A (es)
NO (1) NO307979B1 (es)
NZ (1) NZ273045A (es)
SG (1) SG48935A1 (es)
SK (1) SK281796B6 (es)
WO (1) WO1995008170A1 (es)

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Also Published As

Publication number Publication date
CA2169745A1 (en) 1995-03-23
CZ67896A3 (en) 1996-07-17
SG48935A1 (en) 1998-05-18
CN1064772C (zh) 2001-04-18
WO1995008170A1 (en) 1995-03-23
EP0719439A1 (en) 1996-07-03
IN184794B (es) 2000-09-30
SK281796B6 (sk) 2001-08-06
US5749067A (en) 1998-05-05
NO961032D0 (no) 1996-03-13
JPH09502814A (ja) 1997-03-18
DE69419615T2 (de) 2000-05-25
FI961158A0 (fi) 1996-03-13
US6061647A (en) 2000-05-09
NO307979B1 (no) 2000-06-26
HUT73986A (en) 1996-10-28
DK0719439T3 (da) 2000-02-07
CN1130952A (zh) 1996-09-11
ATE182420T1 (de) 1999-08-15
HU9600641D0 (en) 1996-05-28
FI118195B (fi) 2007-08-15
GR3031515T3 (en) 2000-01-31
DE69419615D1 (de) 1999-08-26
SK31896A3 (en) 1997-03-05
AU673776B2 (en) 1996-11-21
HK1014392A1 (en) 1999-09-24
MY111134A (en) 1999-08-30
JP3224132B2 (ja) 2001-10-29
NZ273045A (en) 1996-11-26
NO961032L (no) 1996-03-13
CA2169745C (en) 2000-05-16
BR9407535A (pt) 1997-08-26
EP0719439B1 (en) 1999-07-21
KR100363309B1 (ko) 2003-02-17
CZ286743B6 (en) 2000-06-14
HU219994B (hu) 2001-10-28
FI961158A (fi) 1996-03-13
AU7619894A (en) 1995-04-03
KR960705303A (ko) 1996-10-09

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