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CN1121684C - 用于选择性地改变一帧数字信号的方法和装置 - Google Patents

用于选择性地改变一帧数字信号的方法和装置 Download PDF

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Publication number
CN1121684C
CN1121684C CN96198008A CN96198008A CN1121684C CN 1121684 C CN1121684 C CN 1121684C CN 96198008 A CN96198008 A CN 96198008A CN 96198008 A CN96198008 A CN 96198008A CN 1121684 C CN1121684 C CN 1121684C
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China
Prior art keywords
noise
speech
filter
frame
filter circuit
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Expired - Fee Related
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CN96198008A
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Chinese (zh)
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CN1201547A (zh
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T·W·索尔维
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Ericsson Inc
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Ericsson Inc
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    • 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
    • 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
    • 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
    • G10L21/0232—Processing in the frequency domain

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  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (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)
  • Noise Elimination (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
CN96198008A 1995-09-14 1996-09-13 用于选择性地改变一帧数字信号的方法和装置 Expired - Fee Related CN1121684C (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US52800595A 1995-09-14 1995-09-14
US08/528,005 1995-09-14

Publications (2)

Publication Number Publication Date
CN1201547A CN1201547A (zh) 1998-12-09
CN1121684C true CN1121684C (zh) 2003-09-17

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CN96198008A Expired - Fee Related CN1121684C (zh) 1995-09-14 1996-09-13 用于选择性地改变一帧数字信号的方法和装置

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EP (1) EP0852052B1 (et)
JP (1) JPH11514453A (et)
KR (1) KR100423029B1 (et)
CN (1) CN1121684C (et)
AU (1) AU724111B2 (et)
BR (1) BR9610290A (et)
CA (1) CA2231107A1 (et)
DE (1) DE69613380D1 (et)
EE (1) EE03456B1 (et)
MX (1) MX9801857A (et)
NO (1) NO981074L (et)
PL (1) PL185513B1 (et)
RU (1) RU2163032C2 (et)
TR (1) TR199800475T1 (et)
WO (1) WO1997010586A1 (et)

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* Cited by examiner, † Cited by third party
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