DE69331223T2 - Netzwerkechokompensator - Google Patents

Netzwerkechokompensator

Info

Publication number
DE69331223T2
DE69331223T2 DE69331223T DE69331223T DE69331223T2 DE 69331223 T2 DE69331223 T2 DE 69331223T2 DE 69331223 T DE69331223 T DE 69331223T DE 69331223 T DE69331223 T DE 69331223T DE 69331223 T2 DE69331223 T2 DE 69331223T2
Authority
DE
Germany
Prior art keywords
signal
echo
generates
combined
filter
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
DE69331223T
Other languages
English (en)
Other versions
DE69331223D1 (de
Inventor
C Sih
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.)
Qualcomm Inc
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 DE69331223D1 publication Critical patent/DE69331223D1/de
Application granted granted Critical
Publication of DE69331223T2 publication Critical patent/DE69331223T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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 OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
DE69331223T 1992-09-25 1993-09-24 Netzwerkechokompensator Expired - Lifetime DE69331223T2 (de)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
DE69331223D1 DE69331223D1 (de) 2002-01-10
DE69331223T2 true DE69331223T2 (de) 2002-06-13

Family

ID=25491228

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69331223T Expired - Lifetime DE69331223T2 (de) 1992-09-25 1993-09-24 Netzwerkechokompensator

Country Status (25)

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

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