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US Patent 8085947 Multi-channel echo compensation system

Patent 8085947 was granted and assigned to Nuance Communications on December, 2011 by the United States Patent and Trademark Office.

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US Patent 12118273 Local voice data processing
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US Patent 12080314 Dynamic player selection for audio signal processing
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US Patent 12063486 Optimization of network microphone devices using noise classification
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US Patent 12028678 Proximity microphone
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US Patent 11984123 Network device interaction by range
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US Patent 11979960 Contextualization of voice inputs
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US Patent 11961519 Localized wakeword verification
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US Patent 11947870 Audio response playback
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US Patent 11893308 Media playback system with concurrent voice assistance
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US Patent 11869503 Offline voice control
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US Patent 11862161 VAS toggle based on device orientation
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US Patent 11863593 Networked microphone device control
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US Patent 11854547 Network microphone device with command keyword eventing
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Patent abstract

A system reduces echoes in an audio system by de-correlating audio signals. Adaptive filters provide compensation based on the de-correlated signals. A controller controls the de-correlation based upon the adaptation state of the adaptive filters.

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US Patent 11792590 Determining and adapting to changes in microphone performance of playback devices

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