TY - GEN

T1 - Source broadcasting to the masses

AU - Mendlovic, Uri

AU - Feder, Meir

PY - 2014

Y1 - 2014

N2 - This work discusses the source broadcasting problem, i.e. transmitting a source to many receivers via a broadcast channel. The optimal rate-distortion region for this problem is unknown. The separation approach divides the problem into two complementary problems: source successive refinement and broadcast channel transmission. We provide bounds on the loss incorporated by applying time-sharing and separation in source broadcasting. If the broadcast channel is degraded, it turns out that separation-based time-sharing achieves at least a factor of the joint source-channel optimal rate, and this factor has a positive limit even if the number of receivers increases to infinity. For the AWGN broadcast channel a better bound is introduced, implying that all achievable joint source-channel schemes have a rate within one bit of the separation-based achievable rate region for two receivers, or within log2 T bits for T receivers.

AB - This work discusses the source broadcasting problem, i.e. transmitting a source to many receivers via a broadcast channel. The optimal rate-distortion region for this problem is unknown. The separation approach divides the problem into two complementary problems: source successive refinement and broadcast channel transmission. We provide bounds on the loss incorporated by applying time-sharing and separation in source broadcasting. If the broadcast channel is degraded, it turns out that separation-based time-sharing achieves at least a factor of the joint source-channel optimal rate, and this factor has a positive limit even if the number of receivers increases to infinity. For the AWGN broadcast channel a better bound is introduced, implying that all achievable joint source-channel schemes have a rate within one bit of the separation-based achievable rate region for two receivers, or within log2 T bits for T receivers.

UR - http://www.scopus.com/inward/record.url?scp=84906547125&partnerID=8YFLogxK

U2 - 10.1109/ISIT.2014.6875087

DO - 10.1109/ISIT.2014.6875087

M3 - פרסום בספר כנס

AN - SCOPUS:84906547125

SN - 9781479951864

T3 - IEEE International Symposium on Information Theory - Proceedings

SP - 1519

EP - 1523

BT - 2014 IEEE International Symposium on Information Theory, ISIT 2014

PB - Institute of Electrical and Electronics Engineers Inc.

Y2 - 29 June 2014 through 4 July 2014

ER -