Patent · US Active

Apparatus, methods and computer programs for reducing echo

US12413905B2 · kind B2 · utility

0Cited by

6References

19Claims

0Family size

Assignee

NOKIA TECHNOLOGIES OY · FI

Inventors

Wouter LANNEER · Kessel-Lo, BE
Werner Coomans · Zellik, BE
Paschalis Tsiaflakis · Schriek, BE

Key dates

Filing date	Dec 21, 2022
Grant date	Sep 9, 2025
Priority date	—
Expiry date	Jul 15, 2043

Classification

Technology area (CPC G)Physics
CPC primaryG10L2021/02082
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Apparatus, methods and computer programs are provided for reducing echo in microphone signals. The apparatus can be configured to obtain an echo path delay estimate and obtain information indicative of a number of future frames used by an acoustic echo cancellation filter. The apparatus can also be configured to obtain information indicative of a time shift between consecutive frames processed by the acoustic echo cancellation filter. The apparatus can also be configured to determine at least a first delay to be added to a loudspeaker signal and determine at least a second delay to be added to a microphone signal. The determination of the first delay and the second delay is based on the echo path delay estimate, the number of future frames and the time shift between consecutive frames processed by the acoustic echo cancellation filter.

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