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Content Provider | IEEE Xplore Digital Library |
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Author | Fan, Nianfei Liu, Yu Wang, Quan Zhang, Lin |
Copyright Year | 2014 |
Description | Author affiliation: Key Lab of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, China (Fan, Nianfei; Liu, Yu; Wang, Quan; Zhang, Lin) |
Abstract | Wireless video multicast has become one of the key technologies to wireless applications. But the main challenge of wireless video multicast, i.e. the “cliff effect”, remains to be solved. SoftCast is a novel video coding and transmission scheme which allocates power to different coefficient chunks and transmits analog signals directly without quantization and entropy coding. It can solve the “cliff effect” effectively. And when it sends one video to multiply receivers, all the receivers can decode video performances fit to their channel qualities. However, reconstruction performance of SoftCast is not good when it comes to some bad channels. In this paper, a hybrid digital-analog video multicast scheme which transmits the super-position signal of H.264/AVC stream and H.264/AVC quantization residuals is proposed. With effective power allocation algorithm and appropriate parameter settings, gains provided by residuals signal are maximized. Simulation shows that the proposed scheme can achieve high performance gains based on SoftCast analog transmission and power allocation, and it outperforms the other hybrid digital-analog video multicast schemes by more than 4dB, e.g. the WSVC scheme. |
Starting Page | 277 |
Ending Page | 282 |
File Size | 805322 |
Page Count | 6 |
File Format | |
ISBN | 9789860334074 |
ISSN | 18825621 |
DOI | 10.1109/WPMC.2014.7014830 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2014-09-07 |
Publisher Place | Australia |
Access Restriction | Subscribed |
Rights Holder | National Institute of Information and Communicatio |
Subject Keyword | Video coding Wireless communication HDA Receivers Bandwidth Encoding Decoding Resource management H.264/AVC Video multicast SoftCast |
Content Type | Text |
Resource Type | Article |
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