Adaptive estimation of delay in audio systems
US9246545B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2014 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Jun 15, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Features are disclosed for adaptively estimating propagation delay in an audio system. A first device in communication with a speaker may be configured produce sound based on an audio playback signal. A second device in communication with one or more microphones may be configured to detect sound as a microphone signal. The second device may perform acoustic echo cancellation using a first propagation delay parameter and determine a first echo return loss enhancement. The second device may perform acoustic echo cancellation using a second propagation delay parameter and determine a second echo return loss enhancement. A propagation delay between the audio playback signal and the microphone signal may be adaptively estimated based on a comparison of the first and second echo return loss enhancements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.