RU95101029A - Устройство отсечки шума, возбуждаемое при детектировании речевой активности - Google Patents

Устройство отсечки шума, возбуждаемое при детектировании речевой активности

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Publication number
RU95101029A
RU95101029A RU95101029/09A RU95101029A RU95101029A RU 95101029 A RU95101029 A RU 95101029A RU 95101029/09 A RU95101029/09 A RU 95101029/09A RU 95101029 A RU95101029 A RU 95101029A RU 95101029 A RU95101029 A RU 95101029A
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Russia
Prior art keywords
speech
signal
noise
sound
white noise
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RU95101029/09A
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English (en)
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RU2151430C1 (ru
Inventor
Джон Янижевски Томас
Us]
Чарльз Реччоне Майкл
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Эйти энд Ти Корп. (US)
Эйти энд Ти Корп.
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Publication of RU95101029A publication Critical patent/RU95101029A/ru
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Publication of RU2151430C1 publication Critical patent/RU2151430C1/ru

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • 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
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/012—Comfort noise or silence coding
    • 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
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
    • G10L19/135—Vector sum excited linear prediction [VSELP]
    • 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
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • 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
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02168—Noise filtering characterised by the method used for estimating noise the estimation exclusively taking place during speech pauses
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Детектор речевой активности использует оценку энергии, чтобы детектировать наличие речи в принятом речевом сигнале в режиме работы в присутствии шума. Когда речь отсутствует, система ослабляет сигнал и вводит белый шум с фильтрованными нижними частотами. Дополнительно используется набор фильтров верхних частот для фильтрования принятого сигнала на основании уровня фонового шума. Это фильтрование верхних частот применяется к сигналу независимо от того, присутствует ли речевой компонент в сигнале или нет. Таким образом, комбинация аттенюации сигнала с вводом белого шума с фильтрованными нижними частотами в течение периодов отсутствия речи вместе с фильтрованием верхних частот сигнала улучшает качество звука при декодировании речи, которая была закодирована в режиме работы в присутствии шумов.

Claims (1)

  1. Детектор речевой активности использует оценку энергии, чтобы детектировать наличие речи в принятом речевом сигнале в режиме работы в присутствии шума. Когда речь отсутствует, система ослабляет сигнал и вводит белый шум с фильтрованными нижними частотами. Дополнительно используется набор фильтров верхних частот для фильтрования принятого сигнала на основании уровня фонового шума. Это фильтрование верхних частот применяется к сигналу независимо от того, присутствует ли речевой компонент в сигнале или нет. Таким образом, комбинация аттенюации сигнала с вводом белого шума с фильтрованными нижними частотами в течение периодов отсутствия речи вместе с фильтрованием верхних частот сигнала улучшает качество звука при декодировании речи, которая была закодирована в режиме работы в присутствии шумов.
RU95101029/09A 1994-01-28 1995-01-27 Имитатор шума, управляемый детектированием активности речи RU2151430C1 (ru)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/188.294 1994-01-28
US08/188,294 US5657422A (en) 1994-01-28 1994-01-28 Voice activity detection driven noise remediator
US08/188294 1994-01-28

Related Child Applications (1)

Application Number Title Priority Date Filing Date
RU99114452/09A Division RU99114452A (ru) 1994-01-28 1995-01-27 Устройство и способ обработки сигналов

Publications (2)

Publication Number Publication Date
RU95101029A true RU95101029A (ru) 1996-11-10
RU2151430C1 RU2151430C1 (ru) 2000-06-20

Family

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Family Applications (1)

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RU95101029/09A RU2151430C1 (ru) 1994-01-28 1995-01-27 Имитатор шума, управляемый детектированием активности речи

Country Status (7)

Country Link
US (1) US5657422A (ru)
EP (2) EP0665530B1 (ru)
KR (1) KR100367533B1 (ru)
CN (1) CN1132988A (ru)
CA (1) CA2138818C (ru)
DE (2) DE69518174T2 (ru)
RU (1) RU2151430C1 (ru)

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EP1017042B1 (en) 2004-11-03
CA2138818C (en) 1999-05-11
US5657422A (en) 1997-08-12
DE69533734D1 (de) 2004-12-09
RU2151430C1 (ru) 2000-06-20
DE69518174D1 (de) 2000-09-07
EP0665530B1 (en) 2000-08-02
KR100367533B1 (ko) 2003-04-07
KR950035167A (ko) 1995-12-30
DE69518174T2 (de) 2001-05-31
CA2138818A1 (en) 1995-07-29
EP0665530A1 (en) 1995-08-02
DE69533734T2 (de) 2005-11-03
CN1132988A (zh) 1996-10-09
EP1017042A1 (en) 2000-07-05

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