Multi-Channel Acoustic Echo Cancellation
US-2024203390-A1 · Jun 20, 2024 · US
Signal processing method, signal processing device, and signal processing program
US9154635B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9154635-B2 |
| Application number | US-200913121144-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 15, 2009 |
| Priority date | Sep 26, 2008 |
| Publication date | Oct 6, 2015 |
| Grant date | Oct 6, 2015 |
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Abstract
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Provided is a signal processing method which reduces a plurality of echoes by receiving a plurality of reception signals and subtracting a pseudo echo generated by a plurality of adaptive filters which input the reception signals from a plurality of echoes generated by the reception signals. At least one of the reception signals is delayed to generate a delayed reception signal. The reception signal and the delayed reception signal are inputted to the adaptive filters to generate a pseudo echo. The frequency of inputting the reception signal and the delayed reception signal to the adaptive filters is controlled in accordance with the sensitivity of a localization change of the reception signals.
First claim
Opening claim text (preview).
The invention claimed is: 1. A signal processing method of receiving a plurality of received signals, and subtracting echo replicas generated by a plurality of adaptive filters having said plurality of received signals as an input, respectively, from a plurality of echoes to be generated from said plurality of received signals, thereby to reduce said plurality of echoes, comprising: generating delayed received signals by delaying at least one received signal, out of said plurality…
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- H04M9/082Primary
Electricity · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Physics · mapped topic
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9154635B2 cover?
- Provided is a signal processing method which reduces a plurality of echoes by receiving a plurality of reception signals and subtracting a pseudo echo generated by a plurality of adaptive filters which input the reception signals from a plurality of echoes generated by the reception signals. At least one of the reception signals is delayed to generate a delayed reception signal. The reception s…
- Who is the assignee on this patent?
- Sugiyama Akihiko, Nec Corp
- What technology area does this patent fall under?
- Primary CPC classification H04M9/082. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 06 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).