FI110346B - Verkon kaiun kumoaja - Google Patents

Verkon kaiun kumoaja Download PDF

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Publication number
FI110346B
FI110346B FI942443A FI942443A FI110346B FI 110346 B FI110346 B FI 110346B FI 942443 A FI942443 A FI 942443A FI 942443 A FI942443 A FI 942443A FI 110346 B FI110346 B FI 110346B
Authority
FI
Finland
Prior art keywords
signal
echo
control
filter
state
Prior art date
Application number
FI942443A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI942443A (fi
FI942443A0 (fi
Inventor
Gilbert C Sih
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of FI942443A publication Critical patent/FI942443A/fi
Publication of FI942443A0 publication Critical patent/FI942443A0/fi
Application granted granted Critical
Publication of FI110346B publication Critical patent/FI110346B/fi

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/234—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using double talk detection
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Computational Linguistics (AREA)
  • Multimedia (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Fish Paste Products (AREA)
  • Primary Cells (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Catalysts (AREA)
  • Polarising Elements (AREA)
FI942443A 1992-09-25 1994-05-25 Verkon kaiun kumoaja FI110346B (fi)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US95107492 1992-09-25
US07/951,074 US5307405A (en) 1992-09-25 1992-09-25 Network echo canceller
US9309112 1993-09-24
PCT/US1993/009112 WO1994008418A1 (en) 1992-09-25 1993-09-24 Network echo canceller

Publications (3)

Publication Number Publication Date
FI942443A FI942443A (fi) 1994-05-25
FI942443A0 FI942443A0 (fi) 1994-05-25
FI110346B true FI110346B (fi) 2002-12-31

Family

ID=25491228

Family Applications (1)

Application Number Title Priority Date Filing Date
FI942443A FI110346B (fi) 1992-09-25 1994-05-25 Verkon kaiun kumoaja

Country Status (25)

Country Link
US (4) US5307405A (hu)
EP (3) EP1119172B1 (hu)
JP (2) JP3447735B2 (hu)
KR (1) KR100284202B1 (hu)
CN (1) CN1041374C (hu)
AT (1) ATE209837T1 (hu)
AU (1) AU660243B2 (hu)
BG (1) BG61985B1 (hu)
BR (1) BR9305647A (hu)
CA (1) CA2123002C (hu)
CZ (1) CZ288667B6 (hu)
DE (1) DE69331223T2 (hu)
ES (1) ES2398091T3 (hu)
FI (1) FI110346B (hu)
HK (1) HK1015215A1 (hu)
HU (1) HU215224B (hu)
IL (1) IL107100A (hu)
MX (1) MX9305889A (hu)
NO (1) NO309835B1 (hu)
PL (1) PL173748B1 (hu)
RO (1) RO114392B1 (hu)
RU (1) RU2109408C1 (hu)
SK (1) SK282101B6 (hu)
WO (1) WO1994008418A1 (hu)
ZA (1) ZA936322B (hu)

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* Cited by examiner, † Cited by third party
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