Patent · US Active

Echo canceler

US8644495B2 · kind B2 · utility

2Cited by

3References

4Claims

0Family size

Assignee

Mitsubishi Electric Corporation · JP

Inventors

Takuya Taniguchi · Tokyo, JP
Shin Kato · Tokyo, JP
Noritaka Kokido · Tokyo, JP

Key dates

Filing date	Dec 30, 2011
Grant date	Feb 4, 2014
Priority date	—
Expiry date	Aug 9, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH04M9/082
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

An echo canceler 10 generates an echo elimination signal by filtering through adaptive filters 101 and 102 reference signals input from sound sources causing echoes. It includes a sound source number detecting unit 103 for detecting the number of the sound sources causing echoes from the reference signals, and a control unit 105 for making the number of taps of the adaptive filters 101 and 102 variable in accordance with the number of the sound sources detected by the sound source number detecting unit 103.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.