Mpeg-4 Adaptive Streaming for Virtual Cities Flyover
نویسندگان
چکیده
Interactive network-based navigation over large urban environments raises difficult problems due to the size and complexity of these scenes. In this paper, we present a stream proposed for MPEG-4 standardization allowing navigation over 3D cities in real time. Thanks to a novel progressive and hierarchical representation called PBTree, only perceptible details for all the regions visible from a given viewpoint are progressively streamed to visualization clients. So as to efficiently transmit city model over network, a coding scheme to compress the PBTree is used.
منابع مشابه
Model Dependent Power Aware Compression Algorithms for MPEG-4 Virtual Human Animation in Mobile Computers
MPEG-4 Body Animation Parameters (BAPs) are used for animation of MPEG-4 compliant virtual human-like characters. Distributed virtual reality applications and networked games on mobile computers require access to locally stored or streamed compressed BAP data. Existing MPEG-4 BAP compression techniques are inefficient for streaming, or storing, BAP data on mobile computers, because (a) MPEG-4 c...
متن کاملAn Adaptive MPEG-4 Streaming System Based on Object Prioritisation
Streaming of video and multimedia content has generated a lot of interest, especially with the recent development of mobile devices with multimedia capabilities. However, ubiquitous multimedia systems face many challenges, such as varied and limited network performance and viewing device capabilities. Adaptive streaming systems are frequently used to reconcile these limitations, while also prov...
متن کاملA Priority Based Adaptive MPEG-4 Streaming System Using Pre-encoded Video Objects
Ubiquitous multimedia systems face many challenges such as varied and limited network performance and viewing device capabilities. Adaptive streaming systems are frequently used to reconcile these limitations, while also providing an improved level of perceptible quality to the end user. In this paper, we propose an adaptive streaming system that exploits the Video Object (VO) coding capabiliti...
متن کاملCritic review on MPEG-4 face and body animation
The MPEG-4 Face and Body Animation (FBA) specifications aims at standardizing an interchange format for specifying virtual face and body modeling and related animation parameters. The scene graph concept, the FBA nodes, semantics and representation of the animation parameters as well as compression and streaming capabilities are successively addressed. The compatibility between virtual characte...
متن کاملEvaluating and Enhancing the Performance of IP-based Streaming Media Services and Applications
This thesis deals with multimedia communication over unreliable and resourceconstrained IP-based packet-switched networks. The focus is on estimating, evaluating and enhancing the quality of streaming media services, and streaming video services in particular. The work can be divided into three parts. Part A covers issues related to predicting the perceived quality of streaming media applicatio...
متن کامل