| Paper: | ITT-P2.9 | ||
| Session: | Communication Technoloiges | ||
| Time: | Friday, May 21, 09:30 - 11:30 | ||
| Presentation: | Poster | ||
| Topic: | Industry Technology Track: Acoustic and Electrical Noise and Echo Cancellation | ||
| Title: | ULTRA LOW-POWER SUB-BAND ACOUSTIC ECHO CANCELLATION FOR WIRELESS HEADSETS | ||
| Authors: | Julie Johnson; Dspfactory Ltd. | ||
| Etienne Cornu; Dspfactory Ltd. | |||
| Gary Choy; Dspfactory Ltd. | |||
| John Wdowiak; Dspfactory Ltd. | |||
| Abstract: | Integrating voice-processing algorithms into headsets is a challenging task due to size and power constraints. As a result of the small size of these headsets, acoustic leakage between the closely located speaker and microphone is a common problem. To address this problem, an oversampled sub-band adaptive acoustic echo cancellation system is proposed and implemented on an ultra-low resource DSP system. The echo cancellation algorithm is integrated with two voice activity detectors and double-talk detection logic to provide a fully functional system. By using decimation, load balancing and other optimization techniques, the complete system consumes about 6 milliwatts of power. Other signal-processing algorithms can be added with very little impact on power consumption and no impact on size. Tests on a BlueTooth headset show an echo return loss enhancement of about 15 dB for a typical headset signal level. | ||
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