Unequal power allocation for scalable video transmission over WiMAX

Author

Ahmad, Z. ; Worrall, S. ; Kondoz, A.

Author_Institution

Centre for Commun. Syst. Res., Surrey Univ., Guildford

fYear

2008

fDate

June 23 2008-April 26 2008

Firstpage

517

Lastpage

520

Abstract

In this paper, an unequal power allocation (UPA) scheme for the transmission of SVC (scalable video coded) packets, over WiMAX communications channels is proposed. Transmission power is an important resource in wireless links, and its dynamic use enhances the successful transmission of video packets. Specifically, the proposed UPA scheme improves the decoded video quality by jointly optimizing the source rate allocated to encode the video and the power allocated to transmit the video packets. Base layer packets are allocated more power compared to enhancement layer packets, ensuring the efficient use of the available power budget. For fast, on the fly allocation of the power, lookup tables have been generated. The results show improvements in objective and subjective video quality.

Keywords

WiMax; channel allocation; decoding; image enhancement; video coding; wireless channels; SVC; UPA scheme; WiMAX communication channel; image enhancement; scalable video coding; unequal power allocation; video packet transmission; video quality decoding; wireless link; Bandwidth; Error correction; Lagrangian functions; OFDM; Power distribution; Resilience; Resource management; Static VAr compensators; Table lookup; WiMAX; Scalable video coding; error resilience;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia and Expo, 2008 IEEE International Conference on

Conference_Location

Hannover

Print_ISBN

978-1-4244-2570-9

Electronic_ISBN

978-1-4244-2571-6

Type

conf

DOI

10.1109/ICME.2008.4607485

Filename

4607485