Ip And Atm Networks In The Video Storage, Transmission Control And Terminal

The development of multimedia in broadband network brings us new chanlledges of different media objects, such as audio, image & video. Multimedia applications contain different media objects stored in remote server or generated in real-time. These objects should be presented to end user with temporal or spatial restrictions. Furthermore, the storage, transmission and presentation of multimedia data are the three key problems should be resolved while constructing distributed multimedia system.However, it is still a hard work to transmit MPEG VBR (Variable Bit Rate) video in IP & ATM network. Because MPEG video need more storage space (though achievements in compression algorithms have decrease it to a reasonable degree), high transmission bandwidth, low transmission delay and delay jitter (especially to real-time video). How to guarantee video transmission QoS (Quality of Service)? More importantly, video data are not simple plain text; they contain multi-semantic media objects and can be described and presented in different ways. How to present them to end-users in order to guarantee QoP (Quality of Presentation)?We pay more attention to MPEG video storage, transmission control and presentation in IP and ATM network in this thesis. We review and summarize relative achievements in this field, we then generalize these topics to MPEG video, especially its storage, transmission control and presentation in broadband IP and ATM network.We summarized common video server architecture, analyzed the performance requirements, data placement and admission control problem, etc., of large-scale video storage server. We propose a new data placement scheme and its admission control algorithm based on parallel disk arrays, which can satisfy user's multi-QoS requirements.We analyzed and summarized network traffic models commonly used in network analysis. At the same time, we generalize the idea to video stream modeling in IP and ATM network. We analyzed statistic characteristics of single MPEG VBR video stream and construct its traffic model, which can fit distribution function and auto-correlation function of video sequence very perfectly; We also established aggregated MPEG VBR video stream model based on alpha-stable similarity process. Compared with those proposed self-similarity video traffic models, this model not only fitted video sequence properties such as self-similarity, long range dependence, variability,simultaneously, but also integrates all existing self-similarity models into a uniform framework, so it's a more universal self-similarity traffic model.Traffic shaping and policing is very important in network transmission control. But there is still little work had been done to MPEG video stream. We proposed a new video-shaping scheme based on token bucket, which can meet delay and delay jitter of video connection QoS parameters. We also proposed a predicator-based adaptive video stream transmission algorithm, Which can adjust network resource requirements of video connection adaptively.MPEG video coding algorithms such as MPEG2 use a layered video-coding algorithm, in order to provide different resolvtions in different situations. MPEG4 use a new approach based on object-oriented coding. We discussed priorities mapping of layered and object-oriented coding video data and it transmission in ATM network.We also discussed the presentation of multimedia to end-user in order to support networking multimedia applications. We discussed the abstract conceptual model of representation image and video in a high level, we also summarized theory and method of content-based index and retrieval, proposed a GUASS filtering-based method for image retrieval.