Prioritisation of data partitioned MPEG—4 video over mobile networks

Abstract

Abstract. Despite much research in the field of mobile multimedia, delivery of real-timeinferactive video over noisy wireless channels remains a challenging problem. Two of the major issues in providing true end-to-end mobile multimedia capability are interoperability between platforms and networks and the poor performance of video compression algorithms in error-prone environments. This paper presents a method for prioritising data partitioned MPEG-4 video in a way suitable for transmission over a mobile network. The effectiveness of the technique is demonstrated by examining the performance when transmitted using the Real-Time Transport protocol over GPRS (General Packet Radio Service) data channels under varying channel conditions.

Data Partitioning Technique for Improved Video Prioritization

“…Because of the increasing importance of the data in DP-C, DP-B, and DP-A, respectively, data-partitioning lends itself to Unequal Error Protection (UEP). In [26], MPEG-4 part 2, internal partitions were split between General Packet-Radio Service (GPRS) channels, with different FEC rates for each channel. With the standardization of H.264/AVC, data partitions [23] were no longer built-in, facilitating UEP.…”

Three-Dimensional Media for Mobile Devices

“…Segments are then protected with unequal amount of FEC data. For partitioning the video bit streams, there are several methods such as data partitioning and spatial-temporal quality layering [89]. In the referred study, a partitioning based on the views only is performed, i.e., left/right views in different segments or left/depth data in different segments.…”

Cross-Layer QoS Scheduling for Layered Multicast Streaming in OFDMA Wireless Networks

“…This means that some users in the multicast flow are incapable of decoding the received data. Although different users will miss different packets, the pruned multicast scheduling is especially useful for hierarchical video codings like [12,22].…”

“…The most relevant elements of the video sequence are included in the basic layer, while the less relevant pieces of information are put into the enhancement layer [12,22]. The basic layer only provides a low-resolution video image.…”