Efficient Error-Resilient Multicasting for Multi-View 3D Videos in Wireless Network

Abstract

With the emergence of naked-eye 3D mobile devices, mobile 3D video services are becoming increasingly important for video service providers, such as Youtube and Netflix, while multi-view 3D videos have the potential to inspire a variety of innovative applications. However, enabling multi-view 3D video services may overwhelm WiFi networks when every view of a video are multicasted. In this paper, therefore, we propose to incorporate depth-image-based rendering (DIBR), which allows each mobile client to synthesize the desired view from nearby left and right views, in order to effectively reduce the bandwidth consumption. Moreover, when each client suffers from packet losses, retransmissions incur additional bandwidth consumption and excess delay, which in turn undermines the quality of experience in video applications. To address the above issue, we first discover the merit of view protection via DIBR for multi-view video multicast using a mathematical analysis and then design a new protocol, named Multi-View Group Management Protocol (MVGMP), to support the dynamic join and leave of users and the change of desired views. The simulation results demonstrate that our protocol effectively reduces bandwidth consumption and increases the probability for each client to successfully playback the desired views in a multi-view 3D video.

Improvements to Multimedia Content Delivery over IEEE 802.11 Networks

“…In this regard, network functions must adequately manage several multicast sessions and the resources assigned to each of them. Nevertheless, despite the research efforts made [65,66], very little progress has been made in practice in integrating rate adaptation features while ensuring high scalability, and this fact is still an open issue. As with the challenges described above, this Doctoral Thesis aims to design a scalable scheme for multicast data rate selection that enables seamless user mobility and the management of several multicast sessions.…”

Multicast Group Management for Multi-View 3D Videos in Wireless Networks

“…Since retransmission is necessary to be involved when a desired view cannot be received or synthesized, we derive the minimal number of views required to be retransmitted to obtain all desired views for each user later in [24]. By using Theorem 1, we can immediately arrive at the following corollary.…”

“…The theoretical result is first summarized in the following theorem where we fix p select and let |K i | → ∞, and we then present the insights from the theorem by comparing the results of single-view subscription and multi-view subscription. Due to the space constraint, a more general analysis that also allows each user to subscribe a sequence of consecutive views is presented in [24].…”

“…IGMP is a receiver-oriented protocol, where each user periodically and actively updates its joining multicast groups to the designated router (i.e., the AP in this paper). Due to the space constraint, this section only summarizes the behavior of our protocol, and detailed operation can be founded in [24].…”

“…Therefore, MVGMP can effectively reduce the number of multicast views. Due to the space constraint, an illustrative example is presented in [24]. Discussion.…”