| Patent application number | Description | Published |
|---|
| 20080253552 | Acoustic Echo Canceller - An acoustic echo cancellation device ( | 10-16-2008 |
| 20080267378 | Conference System - A conference system ( | 10-30-2008 |
| 20080300869 | Audio Signal Dereverberation - A method of estimating the reverberations in an acoustic signal (y) comprises the steps of determining the frequency spectrum (Y) of the signal (y), providing a first parameter (α) indicative of the decay of the reverberations part (r) of the signal over time, and providing a second parameter (β) indicative of the amplitude of the direct part (d) of the signal relative to the reverberations part (r). An estimated frequency spectrum ({hacek over (R)}) of the reverberations signal (r) is produced using the frequency spectrum (Y) of a previous frame, the first parameter (α), and the second parameter (β). The second parameter (β). The second parameter (β) is preferably inversely proportional to the early-to-late ratio of the signal (y). | 12-04-2008 |
| 20100020984 | SIGNAL PROCESSING SYSTEM AND METHOD - A signal processing system comprises a microphone ( | 01-28-2010 |
| 20100189274 | DEVICE FOR AND A METHOD OF PROCESSING AUDIO SIGNALS - A method is provided which is suitable to cope with non-linear echo paths during acoustic echo cancellation in speakerphones. Non-linear paths occur particularly in hands-free operation of, e.g., a mobile phone, due to driving the amplifier and loudspeaker in the non-linear range. The idea is to combine the commonly known one microphone approach of linear acoustic echo cancellation using an adaptive filter and a post-processor together with a multiple microphone approach using beam forming which separately removes the non-linear part of the echo. | 07-29-2010 |
| 20110007073 | METHOD AND APPARATUS FOR MODIFYING A DIGITAL IMAGE - A digital image ( | 01-13-2011 |
| 20110103625 | AUDIO PROCESSING - An audio processing arrangement ( | 05-05-2011 |
