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Design of an incremental machine learning component of a ubiquitous multimodal multimedia computing system

Design of an incremental machine learning component of a ubi...

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2nd IEEE International conference on Wireless and Mobile computing, networking and Communications (WiMob 2006)

作者： Hina, Manolo Dulva Tadj, Chakib Ramdane-Cherif, Amar Univ Quebec Ecole Technol Super Montreal PQ Canada Univ Versailles St Quentin En Yvelines Versailles France Univ Quebec Ecole Technol Super Elect Engn Dept Montreal PQ Canada Univ Versailles St Quentin En Yvelines PRISM Lab F-78035 Versailles France

ISBN: (纸本)1424404940

Machine learning (ML) allows a machine to acquire basic and decision-making knowledge so that it can be delegated with tasks that are otherwise left to human for implementation. Incremental learning is a form of continuous ML wherein the knowledge acquisition can go on indefinitely for as long as there is some new knowledge to learn. In effect, a machine becomes smarter after gaining added knowledge from training. Our paper details the design of an incremental ML component of a ubiquitous multimodal multimedia computing system. Our system chooses the media and modalities that are appropriate for the user situation;the situation itself is based upon user's context, user's profile and the user's environment and hardware profile. The user context itself is dependent on the user's location, the noise level in the workplace and the presence or absence of other people in the vicinity, and the user's computing device. If applicable, the user's special need (i.e. handicap) is also taken into consideration in the media and modality selection. Incremental ML allows our system to become fault-tolerant, capable of finding replacement to a missing or defective component.

关键词： distributed computing fault tolerance learning systems multimedia systems user interfaces

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Lightweight Steganography on Smartphones

Lightweight Steganography on Smartphones

引用

3rd IEEE Consumer Communications and networking conference

作者： Amoroso, Alessandro Masotti, Marco Univ Bologna Dept Comp Sci I-40127 Bologna Italy

ISBN: (纸本)9781424400850

Steganography is an historical technique to send secret messages embedded into carrier messages. The introduction of computers provided very sophisticated techniques to create carrier messages, to embed the secret, and to detect steganographic messages. The smartphone devices are both popular and ubiquitous, and they can be used as an "all-in-one" device for steganography. The users can shoot photos, and use them as carrier message. By means of the computational capacity of the smartphones, the users can also embed and retrieve small messages into the photos stored into the device. Moreover, the users can securely communicate its secrets by means of sending and receiving MMS messages. The multimedia Messaging Service, MMS, is a common technique to exchange images in the actual scenario of cellular telephony. In this paper we show the results of preliminary studies to test the feasibility of such an approach.

关键词： Steganography Smart phones Watermarking Cryptography Embedded computing Pervasive computing Computer science Message service Telephony Testing

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Investigating a stream synchronization middleware for the NEES MAST system

Investigating a stream synchronization middleware for the NE...

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conference on multimedia computing and networking 2006

作者： Beyer, JC Chirravuri, SK Du, DHC Univ Minnesota Digital Technol Ctr Minneapolis MN 55455 USA

ISBN: (纸本)0819461113

This paper describes the streaming synchronization middleware research conducted while investigating how to provide a collaborative experimentation system for the NEES Multi-Axial Sub-Assemblage Testing (MAST) Experimental setup at the University of Minnesota. Continuous multimedia streams such as those produced by MAST experiments are characterized by well-defined temporal relationships between subsequent media units (MUs). The information present in these streams can only be presented correctly when these time-dependent relationships are maintained during presentation time. Even if these relationships change during transportation (e.g. due to network delays), they need to be reconstructed at the client (sink) before playout. Whereas most previous work addresses synchronization at the application level by modifying the end system, Our goal is to leave the endsystem largely unchange and simply add a new synchronization middleware application control system. This paper presents our three proposed algorithms that ensure the continuous and synchronous playback of distributed stored multimedia streams across a communications network via a middleware controlled commercial media player.

关键词： multimedia middleware synchronization Internet data streaming

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The effects of frame rate and resolution on users playing first person shooter games

The effects of frame rate and resolution on users playing fi...

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conference on multimedia computing and networking 2006

作者： Claypool, M Claypool, K Damaa, F Worcester Polytech Inst Worcester MA 01609 USA Univ Massachusetts Lowell Lowell MA USA

ISBN: (纸本)0819461113

The rates and resolutions for frames rendered in a computer game directly impact the player performance, influencing both the overall game playability and the game's enjoyability. Insights into the effects of frame rates and resolutions can guide users in their choice for game settings and new hardware purchases, and inform system designers in their development of new hardware, especially for embedded devices that often must make tradeoffs between resolution and frame rate. While there have been studies detailing the effects of frame rate and resolution on streaming video and other multimedia applications, to the best of our knowledge, there have been no studies quantifying the effects of frame rate and resolution on user performance for computer games. This paper presents results of a carefully designed user study that measures the impact of frame rate and frame resolution on user performance in a first person shooter game. Contrary to previous results for streaming video, frame rate has a marked impact on both player performance and game enjoyment while resolution has little impact on performance and some impact on enjoyment.

关键词： Video Visualization Image resolution multimedia Weapons Human-machine interfaces Mobile devices Statistical analysis computing systems Hand-held displays

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QBIX-G -: A transcoding multimedia proxy

QBIX-G -: A transcoding multimedia proxy

引用

conference on multimedia computing and networking 2006

作者： Schojer, P Böszörmenyi, L Hellwagner, H Klagenfurt Univ Dept Informat Technol Klagenfurt Austria

ISBN: (纸本)0819461113

An adaptive multimedia proxy is presented which provides (1) caching, (2) filtering, and (3) media gateway functionalities. The proxy can perform media adaptation on its own, either relying on layered coding or using transcoding in the decompressed domain. A cost model is presented which incorporates user requirements, terminal capabilities, and video variations in one formula. Based on this model, the proxy acts as a general broker of different user requirements and of different video variations. This is a first step towards What You Need is What You Get (WYNIWYG) video services, which deliver videos to users in exactly the quality they need and are willing to pay for. The MPEG-7 and MPEG-21 standards enable this in an interoperable way. A detailed evaluation based on a series of simulation runs is provided.

关键词： video proxy video caching media gateway media adaptation MPEG-7 MPEG-21 cache replacement strategies

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Characterizing files in the modern Gnutella network: A measurement study

Characterizing files in the modern Gnutella network: A measu...

引用

conference on multimedia computing and networking 2006

作者： Zhao, SY Stutzbach, D Rejaie, R Univ Oregon Eugene OR 97403 USA

ISBN: (纸本)0819461113

The Internet has witnessed an explosive increase in the popularity of Peer-to-Peer (P2P) file-sharing applications during the past few years. As these applications become more popular, it becomes increasingly important to characterize their behavior in order to improve their performance and quantify their impact on the network. In this paper, we present a measurement study on characteristics of available files in the modern Gnutella system. We developed a new methodology to capture accurate "snapshots" of available files in a large scale P2P system. This methodology was implemented in a parallel crawler that captures the entire overlay topology of the system where each peer in the overlay is annotated with its available files. We have captured tens of snapshots of the Gnutella system and conducted three types of analysis on available files: (i) Static analysis, (ii) Topological analysis and (iii) Dynamic analysis. Our results reveal several interesting properties of available files in Gnutella that can be leveraged to improve the design and evaluations of P2P file-sharing applications.

关键词： Video Internet Overlay metrology Explosives multimedia computing systems Error analysis Electronic imaging Solids Systems modeling

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AmbiTalk: Enhancing wireless communication services through the automatic adaptation of mobile communication

AmbiTalk: Enhancing wireless communication services through ...

引用

2nd IEEE International conference on Wireless and Mobile computing, networking and Communications (WiMob 2006)

作者： Karmouch, Eric Martin, Patrick Hassanein, Hossam Queens Univ Sch Comp Kingston ON K7L 3N6 Canada

ISBN: (纸本)1424404940

AmbiTalk is a ubiquitous system based on the Session Initiation Protocol (SIP) and Bluetooth that allows a mobile device to automatically adapt the behavior of its communication services as its user moves from one location to another. The adaptation is policy-based and occurs both pre-call and mid-call. We present the AmbiTalk architecture and discuss how it allows a device to automatically adapt its communication properties to its current environment and other devices. We demonstrate the viability of the AmbiTalk approach with the implementation of a prototype.

关键词： ubiquitous location-based services contextaware computing internet multimedia mobile communications

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How efficient is BitTorrent?

How efficient is BitTorrent?

引用

conference on multimedia computing and networking 2006

作者： Wu, G Chiueh, TC SUNY Stony Brook Dept Comp Sci Stony Brook NY 11794 USA

ISBN: (纸本)0819461113

BitTorrent is arguably the most popular media file distribution protocol used in Internet today. Even though empirically BitTorrent seems to be both efficient and scalable, there has been very little research on the detailed dynamics of its built-in control mechanisms, and their effectiveness across a wide variety of network configurations and protocol parameters. The main goal of this paper is to answer the question of how close BitTorrent is to the optimum, and indirectly how much room there is for further performance optimizations. We develop a centrally scheduled file distribution (CSFD) protocol that can provably minimize the total elapsed time of a one-sender-multiple-receiver file distribution task, and perform a comprehensive comparison between BitTorrent with CSFD. In addition, we compare several peer selection algorithms and analyze the applicability of BitTorrent to real-time streaming applications.

关键词： Receivers Internet Systems modeling multimedia Algorithm development Computer programming Data modeling Performance modeling Computer science Electronic imaging

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Processing delay as a new metric for on-demand mobile ad hoc network routing path selection

Processing delay as a new metric for on-demand mobile ad hoc...

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2nd IEEE International conference on Wireless Communications, networking and Mobile computing (WiCOM 2006)

作者： Lee, Bu Sung San, Mai Ngoc Lim, Teck Meng Yeo, Chai Kiat Seet, Boon Chong Nanyang Technol Univ Sch Comp Engn Ctr Multimedia & Network Technol Singapore Singapore

ISBN: (纸本)9781424405169

A new metric, processing delay, has been proposed for route path selection. Processing delay, proposed by I I I is used to calculate the performance of each node along the route. The function takes into account the number of active nodes in the vicinity of the forwarding node. Simulation experiments which have incorporated the new metric into the on-demand mobile ad hoe network protocol, Dynamic Source Routing (DSR), have shown that the new metric has the characteristics of spreading the routes among the nodes in the network, thus minimizing congestion. The performance of the new on-demand ad hoc network, enhanced-DSR (eDSR), has shown a 20% reduction in packet delay, with marginal increase in hop counts.

关键词： processing delay dynamic source routing ad hoc routing MANET

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A multiple-objective fuzzy decision making based information-aware routing protocol for wireless sensor networks

A multiple-objective fuzzy decision making based information...

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2nd IEEE International conference on Wireless Communications, networking and Mobile computing (WiCOM 2006)

作者： Wang, Leichun Chen, Shihong Li, Xiaojian Wuhan Univ Natl Engn Res Ctr Multimedia Software Wuhan 430072 Peoples R China

ISBN: (纸本)9781424405169

There can be multiple types of data in wireless sensor networks (WSNs) in order to probe the environment accurately, which are different in the energy, the delay and the bandwidth requirements and so on. This requires that routing protocols for WSNs be flexible in routing selection to meet the transmission requirements of the different data This paper proposes a multiple-objective fuzzy decision making based information-aware routing protocol specifically for WSNs, MOFDMIA. In the protocol, sensor nodes are grouped into the clusters and each cluster has a gateway node. Multiple paths are generated between each node and the gateway node in a cluster, and sorted according to the different requirements of the data by multiple-objective fuzzy decision making (MOFDM). MOFDMIA then chooses the "best" path(s) to transmit the data with the different requirements. Simulation results have demonstrated the effectiveness of our approach for different types of data.

关键词： multiple-objective fuzzy decision making (MOFDM) routing protocol wireless sensor networks (WSNs) information-aware

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