Wireless Multi-View Video Streaming with Subcarrier Allocation

Takuya FUJIHASHI  Shiho KODERA  Shunsuke SARUWATARI  Takashi WATANABE  

Publication
IEICE TRANSACTIONS on Communications   Vol.E99-B   No.2   pp.542-554
Publication Date: 2016/02/01
Online ISSN: 1745-1345
Type of Manuscript: PAPER
Category: Multimedia Systems for Communications
Keyword: 
multi-view video,  Subcarrier Allocation,  

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Summary: 
When an access point transmits multi-view video over a wireless network with subcarriers, bit errors occur in the low quality subcarriers. The errors cause a significant degradation of video quality. The present paper proposes Significance based Multi-view Video Streaming with Subcarrier Allocation (SMVS/SA) for the maintenance of high video quality. SMVS/SA transmits a significant video frame over a high quality subcarrier to minimize the effect of the errors. SMVS/SA has two contributions. The first contribution is subcarrier-gain based multi-view rate distortion to predict each frame's significance based on the quality of subcarriers. The second contribution is heuristic algorithms to decide the sub-optimal allocation between video frames and subcarriers. The heuristic algorithms exploit the feature of multi-view video coding, which is a video frame is encoded using the previous time or camera video frame, and decides the sub-optimal allocation with low computation. To evaluate the performance of SMVS/SA in a real wireless network, we measure the quality of subcarriers using a software radio. Evaluations using MERL's benchmark test sequences and the measured subcarrier quality reveal that SMVS/SA achieves low traffic and communication delay with a slight degradation of video quality. For example, SMVS/SA improves video quality by up to 2.7 [dB] compared to the multi-view video transmission scheme without subcarrier allocation.