Patent · US Active

Acoustic echo cancellation and adaptive filters

US8170226B2 · kind B2 · utility

5Cited by
16References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJun 20, 2008
Grant dateMay 1, 2012
Priority date—
Expiry dateFeb 12, 2031

Classification

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

Abstract

In one embodiment, a two-way telecommunication device may perform acoustic echo cancellation on incoming signals. An audio decoding module may produce an audio render signal. An audio capture interface may receive an audio capture signal. A short length adaptive filter may determine a time delay between the audio render signal and the audio capture signal by adaptively predicting a sub-band of the audio capture signal using a corresponding sub-band of the audio render signal.

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