Method and device for acoustic echo cancellation combined...

Details Method and device for acoustic echo cancellation combined... Method and device for acoustic echo cancellation combined...

2006-04-25

2006-04-25

Grier, Laura A. (Department: 2644)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S066000, C379S406010, C379S406080

Reexamination Certificate

active

07035415

ABSTRACT:
A method is described, wherein multiple input signals are subjected to a combination process of adaptive beamforming and adaptive echo cancelling, and wherein for each of the input signals an individual processing history of adaptive echo cancelling data is kept and combined with current adaptive beamforming data. Accordingly an audio processing device is described which comprises at least one parallel acoustic paths for providing respective inputs signals, the acoustic paths are connected in series to beamformer paths, and the device comprises an adaptive beamformer and an adaptive echo canceller for performing adaptive beamforming and adaptive echo cancelling respectively, whereby the adaptive echo canceller is provided with storage means for storing in relation to every input signal, individual processing histories of adaptive echo cancelling data for combination with current adaptive beamforming data. Both beamformer and echo cancelling techniques can be combined such that a reduced number of calculations results.

REFERENCES:
patent: 6049607 (2000-04-01), Marash et al.
patent: 6535609 (2003-03-01), Finn et al.
patent: 6549627 (2003-04-01), Rasmusson et al.
Sven Fisher, Klaus U. Simmer, “Beamforming Microphone Arrays for Speech Acquisitin in Noisy Environments”, Feb. 1996, (Abstract).
Walter Kellermann, Strategies for Combining Acoustic Echo Cancellation and Adapative Beamforming Microphone Arrays, Apr. 1997, (Abstract).

Affiliated with

Also associated with

Rating

Method and device for acoustic echo cancellation combined... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and device for acoustic echo cancellation combined..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for acoustic echo cancellation combined... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3615655