| Paper: | SS-7.3 | ||
| Session: | Distributed Digital Signal Processing for Sensor Networking | ||
| Time: | Thursday, May 20, 10:00 - 10:15 | ||
| Presentation: | Special Session Lecture | ||
| Topic: | Special Sessions: Distributed Digital Signal Processing for Sensor Networking | ||
| Title: | PROVIDING COMMON I/O CLOCK FOR WIRELESS DISTRIBUTED PLATFORMS | ||
| Authors: | Dmitry Budnikov; Intel Corporation | ||
| Igor Chikalov; Intel Corporation | |||
| Sergey Egorychev; Intel Corporation | |||
| Igor Kozintsev; Intel Corporation | |||
| Rainer Lienhart; Intel Corporation | |||
| Abstract: | We propose a novel synchronization scheme for distributedaudio-video input and output on heterogeneous general purposecomputing (GPCs) such as laptops, tablets, PDAs, smart phones,audio recorders, and camcorders. These devices typically possesssensors such as microphones and possibly cameras, and actuatorssuch as loudspeakers and displays. In order to combine themwirelessly into a distributed array signal processing system, itis necessary to provide relative time synchronization to sensorsand actuators. In this work we propose a setup and an algorithm tosynchronize input and output for a network of distributedmulti-channel audio sensors and actuators connected to GPCs. IEEE802.11 wireless network is used to deliver the global clock todistributed GPCs, while the interrupt mechanism is employed todistribute the clock between I/O devices. Experimental resultsdemonstrate a precision in A/D D/A synchronization precisionbetter than $50$ $\mu$s (a couple of samples at 48 kHz). | ||
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