METHOD AND APPARATUS TO REDUCE NON-LINEAR DISTORTION
First Claim
1. A mobile computing device, comprising:
- a speaker operative to receive a first signal and output a second signal;
a first microphone operative to receive the second signal;
a second microphone operative to receive a third signal;
an echo canceller to couple to the first microphone and the second microphone, the echo canceller operative to compare the second signal and the third signal and reduce distortion in the third signal based on the comparison.
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Accused Products
Abstract
Techniques to reduce distortion in acoustic signals in mobile computing devices are described. For example, a mobile computing device may comprise a speaker operative to receive a first signal and output a second signal. The mobile computing device may further comprise a first microphone operative to receive the second signal and a second microphone operative to receive a third signal. An echo canceller may be coupled to the first microphone and the second microphone and may be operative to compare the second signal and the third signal and reduce distortion in the third signal based on the comparison. Other embodiments are described and claimed.
296 Citations
22 Claims
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1. A mobile computing device, comprising:
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a speaker operative to receive a first signal and output a second signal; a first microphone operative to receive the second signal; a second microphone operative to receive a third signal; an echo canceller to couple to the first microphone and the second microphone, the echo canceller operative to compare the second signal and the third signal and reduce distortion in the third signal based on the comparison. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
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receiving a first signal at a speaker and outputting a second signal at the speaker; receiving the second signal at a first microphone and sending the second signal from the first microphone to an echo canceller; receiving a third signal at a second microphone and sending the third signal from the second microphone to the echo canceller; comparing the second signal and the third signal; and reducing distortion in the third signal based on the comparison. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An article comprising a storage medium containing instructions that if executed enable a system to:
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receive a first signal at a speaker and output a second signal at the speaker; receive the second signal at a first microphone and send the second signal from the first microphone to an echo canceller; receive a third signal at a second microphone and send the third signal from the second microphone to the echo canceller; compare the second signal and the third signal; and reduce distortion in the third signal based on the comparison. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification