Title :
Distributed successive approximation coding using broadcast advantage: The two-encoder case
Author :
Chen, Zichong ; Barrenetxea, Guillermo ; Vetterli, Martin
Author_Institution :
LCAV, Ecole Polytech. Fed. de Lausanne (EPFL), Lausanne, Switzerland
fDate :
Sept. 29 2010-Oct. 1 2010
Abstract :
Traditional distributed source coding rarely considers the possible link between separate encoders. However, the broadcast nature of wireless communication in sensor networks provides a free gossip mechanism which can be used to simplify encoding/decoding and reduce transmission power. Using this broadcast advantage, we present a new two-encoder scheme which imitates the ping-pong game and has a successive approximation structure. For the quadratic Gaussian case, we prove that this scheme is successively refinable on the {sum-rate, distortion pair} surface, which is characterized by the rate-distortion region of the distributed two-encoder source coding. A potential energy saving over conventional distributed coding is also illustrated. This ping-pong distributed coding idea can be extended to the multiple encoder case and provides the theoretical foundation for a new class of distributed image coding method in wireless scenarios.
Keywords :
approximation theory; decoding; game theory; network coding; rate distortion theory; source coding; wireless sensor networks; distributed image coding method; distributed successive approximation coding; distributed two-encoder source coding; encoding-decoding; free gossip mechanism; ping-pong distributed coding; ping-pong game; potential energy saving; quadratic Gaussian case; rate-distortion region; sensor networks; successive approximation structure; wireless communication; Approximation methods; Cameras; Decoding; Markov processes; Rate-distortion; Source coding;
Conference_Titel :
Communication, Control, and Computing (Allerton), 2010 48th Annual Allerton Conference on
Conference_Location :
Allerton, IL
Print_ISBN :
978-1-4244-8215-3
DOI :
10.1109/ALLERTON.2010.5707034