AUDIO SIGNAL PROCESSING WITH ACOUSTIC ECHO CANCELLATION
First Claim
1. A method for multi-channel audio signal processing, comprising:
- receiving a left stereo audio signal from a first channel, and receiving a right stereo audio signal from a second channel;
up-mixing the left stereo audio signal and the right stereo audio signal to generate an up-mixed audio signal for a third channel;
de-correlating the up-mixed audio signal from the left stereo audio signal and the right stereo audio signal to generate a de-correlated up-mixed audio signal;
providing the left stereo audio signal to a first loudspeaker to generate a first sound signal, providing the right stereo audio signal to a second loudspeaker to generate a second sound signal, and providing the de-correlated up-mixed audio signal to a third loudspeaker to generate a third sound signal;
picking up the first, second and third sound signals with a microphone to generate a microphone output signal; and
adaptively filtering the microphone output signal with an acoustic echo canceller based on the left stereo audio signal, the right stereo audio signal and the de-correlated up-mixed audio signal to generate an echo compensated microphone signal.
1 Assignment
0 Petitions
Accused Products
Abstract
Multi-channel audio signal processing includes receiving a left stereo audio signal from a first channel and a right stereo audio signal from a second channel; up-mixing the left and the right stereo audio signals to generate an up-mixed audio signal for a third channel; de-correlating the up-mixed audio signal from the left and the right stereo audio signals to generate a de-correlated up-mixed audio signal; providing the left and right stereo signals and the de-correlated up-mixed audio signal to first, second, and third loudspeakers respectively to generate first, second, and third sound signals, respectively; picking up the first, second and third sound signals with a microphone to generate a microphone output signal; and adaptively filtering the microphone output signal with an acoustic echo canceller based on the left, the right, and the de-correlated up-mixed audio signal to generate an echo compensated microphone signal.
-
Citations
20 Claims
-
1. A method for multi-channel audio signal processing, comprising:
-
receiving a left stereo audio signal from a first channel, and receiving a right stereo audio signal from a second channel; up-mixing the left stereo audio signal and the right stereo audio signal to generate an up-mixed audio signal for a third channel; de-correlating the up-mixed audio signal from the left stereo audio signal and the right stereo audio signal to generate a de-correlated up-mixed audio signal; providing the left stereo audio signal to a first loudspeaker to generate a first sound signal, providing the right stereo audio signal to a second loudspeaker to generate a second sound signal, and providing the de-correlated up-mixed audio signal to a third loudspeaker to generate a third sound signal; picking up the first, second and third sound signals with a microphone to generate a microphone output signal; and adaptively filtering the microphone output signal with an acoustic echo canceller based on the left stereo audio signal, the right stereo audio signal and the de-correlated up-mixed audio signal to generate an echo compensated microphone signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A system for multi-channel audio processing, comprising:
-
an up-mixer configured to up-mix a the left stereo audio signal from a first channel and a right stereo audio signal from second channel to generate an up-mixed audio signal for a third channel; a de-correlator configured to de-correlate the up-mixed audio signal from the left stereo audio signal and the right stereo audio signal to generate a de-correlated up-mixed audio signal; and an adaptive acoustic echo canceller configured to echo compensate a microphone output signal based on the left stereo audio signal, the right stereo audio signal and the de-correlated up-mixed audio signal. - View Dependent Claims (15, 16, 17, 18, 19)
-
-
20. A computer-readable medium comprising instructions which, when executed by a computer, cause the computer to:
-
receive a left stereo audio signal from a first channel, and receive a right stereo audio signal from a second channel; up-mix the left stereo audio signal and the right stereo audio signal to generate an up-mixed audio signal for a third channel; de-correlate the up-mixed audio signal from the left stereo audio signal and the right stereo audio signal to generate a de-correlated up-mixed audio signal; provide the left stereo audio signal to a first loudspeaker to generate a first sound signal, provide the right stereo audio signal to a second loudspeaker to generate a second sound signal, and provide the de-correlated up-mixed audio signal to a third loudspeaker to generate a third sound signal; pick up the first, second and third sound signals with a microphone to generate a microphone output signal; and adaptively filter the microphone output signal with an acoustic echo canceller based on the left stereo audio signal, the right stereo audio signal and the de-correlated up-mixed audio signal to generate an echo compensated microphone signal.
-
Specification