Simulation of Video Multicasting over SPLIT Protocol

N.K. Chilamkurti and B. Soh (Australia)

Keywords

: Multicast, H.264, layered video, SPLIT protocol. 2. Related Work Gang Want et.al in [4] discussed related work on transmitting H.26L (currently known as H.264) over 802.11 Wireless LAN. In that paper the authors simulated transmission of H.26L encoded stream over Wireless LAN using two access schemes in different scenarios and measured delay, delay jitter and PSNR degradation. In [5] the authors also did similar work on realtime transmission of H.26L over wireless AD HOC networks an

Abstract

compression. When dealing with video data, loss of data can be tolerated but not delay loss [2]. Therefore for this purpose video data will always be compressed or quantized. This means that data-values, for example pixels, will always be rounded off or truncated to fit a certain number of bits provided or required. In the paper, we investigate the behaviour of SPLIT using layer subscription, with a view to illustrating the importance of priority RED queue using queue occupancy with video traffic and TCP traffic. We use layer subscription at the receiver and priority Queue occupancy at the Router with RED queue to analgize and observe the characteristics of SPLIT protocol with H.264 video, which is chosen to because of its 50% bit rate savings compare to MPEG-4. Our experiments show that not only can SPLIT co-exist with video traffic without degrading the video quality it is also easily scalable. In an analysis discussed in [3], H.264 is known to have the following features: • Variable block size motion compensation • Multiple reference frame prediction • Quarter-pixel and eight-pixel accurate motion vectors and • Entropy coding mode

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