Master Thesis - 2011

Internet traffic is mostly occupied by video and image. It is difficult to distribute Ultra High Definition (UHD) video streams in best-effort network due to congestion. Many researchers have actively studied optical network where optical-electrical-optical (O/E/O) conversion is not required in the internal nodes. Especially, it is expected for future realtime distribution services to transmit large video data through Quality of Service (QoS) guaranteed network. Various services have emerged, such as 3D video service and multiangle video service which provides multiple views from various angles at one contents. If multi-angle video service is realized with existing systems, it has the problem that switching angle takes long time. Since the video cannot be played during the angle is switched, the problem is critical in the multi-angle video distribution service that switching angle frequently occurs.

In this study, I propose P2P-based Ultra High Definition multi-angle video distribution methods. These methods realize to switch angle rapidly by sending all angle videos considering limited bandwidth. Redundant traffic is reduced by distributing sub-angle with low resolution. In this thesis, I consider the UHD multi-angle video distribution either best-effort network or guaranteed network only. Furthermore, I propose the methods which cooperatively distribute UHD video in both networks. These methods have the different characteristics because of the different way to distribute UHD video. Moreover, I propose two distribution methods with both networks. These proposed methods have different way to distribute video and the contrast characteristics.

From computer simulation, evaluation results prove that the proposed methods realize playing video continuously while angle is switched. Moreover, I confirm that first proposed method realizes guaranteed image quality and second proposed method realizes switching angle rapidly.