BS-7-10 WWAN MultiView Video MultiCast with Depth Maps for the Cooperative Peer-To-Peer Repair(BS-7. Network Planning, Control and Management)
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概要
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WWAN video multicast is a big issue because of the unavoidable packet loss, Moreover the NAK implosion problem makes the retransmit per packet almost impossible. Previously proposed cooperative peer-to-peer repair(CPR) strategy[1]is based on the nature of the broadcast of wireless transmission and 'uncorrelatedness' of receivers' channels, focus on using the peers with good WWAN channels to streaming server(rich peers) to locally relay packets lost to peers with bad WWAN channels(poor peers) over a secondary ad-hoc WLAN network. In the interactive MultView video streaming (IMVS) scenario, However, where users can each periodically select one out of the many available views for decoding and display, a poor peer may not have a neigh boring rich peer watching the same view for packet recovery via CPR. In this paper, we propose a new CPR strategy for peers to repair lost packets to neighbours watching different views. The key idea is for server to transmit depth maps in addition to texture maps, so that lost frames in a different view can be reconstructed using depth-image-based rendering (DIBR). Like Forward Error Correction (FEC), encoded depth maps incur an overhead in reduction information transmission to counter networks losses, but it can help us when the FEC does not work. Here mainly show that our proposed scheme(with FEC plus Depth maps) is better than the FEC only case and proposed CPR scheme offers a 1.8 dB PSNR gain over a FEC-only Scheme. The outline of the paper is as follows:System Model in section 2, Formulation in 3, Simulation in 4 and conclusion in 5.
- 2010-08-31
著者
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JI Yusheng
National Institute of Informatics
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Ji Yusheng
National Inst. Informatics (nii) Tokyo Jpn
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Liu Zhi
National Institute of Informatics The Graduate University for advanced Studies
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Cheung Gene
National Institute of Informatics The Graduate University for advanced Studies
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Ji Yusheng
National Institute Of Informatics The Graduate University For Advanced Studies
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Cheung Gene
National Institute Of Informatics
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Ji Yusheng
National Center For Science Information Systems
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