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检索条件"任意字段=Conference on Multimedia Content Access - Algorithms and Systems"

共 2015 条记录，以下是1691-1700 订阅

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content-based retrieval of video shot using the improved nearest feature line method

Content-based retrieval of video shot using the improved nea...

引用

IEEE International conference on Acoustics, Speech, and Signal Processing

作者： Zhao, L Qi, W Li, SZ Yang, SQ Zhang, HJ Tsinghua Univ Dept Comp Sci & Technol Beijing 100084 Peoples R China

ISBN: (纸本)0780370414

The shot based classification and retrieval is very important for video database organization and access. In this paper we present a new approach 'Nearest Feature Line - NFL' used in shot retrieval. We look key-frames in shot as feature points to represent the shot in feature space. Lines connecting the feature points are further used to approximate the variations in the whole shot. The similarity between the query image and the shots in video database are measured by calculating the distance between the query image and the feature lines in feature space. To make it more suitable to video data, we improved the original NFL method by adding constrains on the feature lines. Experimental results show that our improved NFL method is better than the traditional classification methods such as Nearest Neighbor (NN) and Nearest Center (NC).

关键词： content based retrieval

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8th International Workshop on Interactive Distributed multimedia systems, IDMS 2001

引用

8th International Workshop on Interactive Distributed multimedia systems, IDMS 2001

ISBN: (纸本)3540425306

The proceedings contain 26 papers. The special focus in this conference is on Invited Presentation and Short Papers. The topics include: QoS for multimedia - what’s going to make it pay?;new resource control issues in shared clusters;transport-level protocol coordination in cluster-to-cluster applications;data to the people - it’s a matter of control;an access control architecture for metropolitan area wireless networks;design and implementation of a QoS -aware replication mechanism for a distributed multimedia system;distribution of video-on-demand in residential networks;a QoS negotiation scheme for efficient failure recovery in multi-resolution video servers;tolerance of highly degraded network conditions for an h.323-based VoIP service;conception, implementation, and evaluation of a QoS -based architecture for an IP environment supporting differentiated services;a service differentiation scheme for the end-system;enabling the internet to provide multimedia services;an adaptive distributed multimedia middleware platform;QoS management middleware;state transmission mechanisms for a collaborative virtual environment middleware platform;a stable and flexible TCP-friendly congestion control protocol for layered multicast transmission;content-aware quality adaptation for IP sessions with multiple streams;the minimal buffering requirements of congestion controlled interactive multimedia applications;video content management using logical content;adaptive clustering using mobile agents in wireless ad-hoc networks;a novel mechanism for IPv4/v6 transitioning;the case for streaming multimedia with TCP;why an open multimedia framework?;selecting the QoS parameters for multicast applications based on user profile and device capability;a novel group integrity concept for multimedia multicasting and constraint-based configuration of proxylets for programmable networks.

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Web-based multimedia information retrieval for clinical application research

Web-based multimedia information retrieval for clinical appl...

引用

Medical Imaging 2001 conference

作者： Cao, XH Hoo, KS Zhang, H Ching, W Zhang, M Wong, STC Univ Calif San Francisco Lab Radiol Informat San Francisco CA 94143 USA

ISBN: (纸本)0819440094

We described a web-based data warehousing method for retrieving and analyzing neurological multimedia information. The web-based method supports convenient access, effective search and retrieval of clinical textual and image data, and on-line analysis. To improve the flexibility and efficiency of multimedia information query and analysis, a three-tier, multimedia data warehouse for epilepsy research has been built. The data warehouse integrates clinical multimedia data related to epilepsy from disparate sources and archives them into a well-defined data model. The middle-ware consists of business logic components such web server, applets and active server page (ASP) scripts for dealing with user authentication and authorization, HTTP request, SQL data access from data warehouse and algorithms to support data analysis. At client side, a web-based graphical user interface (GUI) is used to receive user's query request and display the retrieved textual data. Client-side image processing and display for DICOM format was implemented by Java applets. An image query and display method based on 3D projections has been developed to retrieve and analyze MRI and PET.

关键词： medical multimedia information data warehouse information retrieval World Wide Web

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A web-based evaluation system for CBIR

A web-based evaluation system for CBIR

引用

-ACM multimedia 2001 Workshops-multimedia Information Retrieval

作者： Müller, H. Müller, W. Marchand-Maillet, S. Pun, T. Squire, D. Vision Group University of Geneva Geneva Switzerland

This papers describes a benchmark test for content-based image retrieval systems (CBIRSs) with the query by example (QBE) query paradigm. This benchmark is accessible via the Internet and thus allows to evaluate any CBIRS which is compliant with the multimedia Retrieval Markup Language (MRML) for query formulation and result transmission. Thus it allows a quick and easy comparison between different features and algorithms for CBIRSs. The benchmark is based on a standardized communication protocol to do the communication between benchmark server and benchmarked system and it uses a freely downloadable image database (DB) to make the results reproducible. A CBIR system that uses MRML and other components to develop MRML-based applications can be downloaded free of charge as well. The evaluation is based on several queries and known relevance sets for these queries. Several answer sets for one query image are possible if judgments of several users exist, thus almost any sort of judgment can be incorporated into the system. The final results are averaged over all queries. The evaluation of several steps of relevance feedback (RF) based on the collected relevance judgments is also included into the benchmark. The performance of RF is often regarded to be even more important than the performance in the first query step because only with RF the adaptation of the system to the users subjective goal can be measured. For the evaluation of a system with RF, the same evaluation measures are used as for the first query step.

关键词： content based retrieval

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Video-Gadget™:: MPEG-7 based audio-visual content indexing and browsing engine

Video-Gadget™:: MPEG-7 based audio-visual content indexing ...

引用

conference on multimedia systems and Applications III

作者： Yoon, K Jun, SB Kim, HJ Lee, JE Lee, JS Song, JM Lee, HY LG Elect Inst Technol Seocho Gu Seoul 137724 South Korea

ISBN: (纸本)081943874X

MPEG-7 is a standard to provide a standardized way of describing contents of multimedia information. The development of technologies related to the MPEG-7 and exploiting MPEG-7 applications have been a main research interest of us for the last two years. TV broadcasting is one specific area of interest among various applications to which MPEG-7 can be of benefit. The Video-Gadget (TM), which is an indexing and retrieval engine of multimedia data, is designed to aid user friendly environment of Digital TV as well as conventional analogue TV. By enabling automatic feature extraction and indexing of received m program with help of low-cost random access storage device, a dull and conventional TV can turn into an interactive personalized entertainment center. With various user-friendly functionalities such as non-linear browsing of received programs, structure-based navigation, and searching/filtering of programs, the user can view the received program anytime the user prefers in the way the user prefers. Even though the Video-Gadget (TM) project, which is currently in progress, aims an environment of the Digital TV broadcast with MPEG-7 descriptions, a version of the Video-Gadget (TM) is under development to actually generate MPEG-7-like descriptions while the analogue stream is received. The real-time generation of the content description in detail brings many problems to solve such as limited I/O bandwidth and computing power and extensive sharing of the system resources. Due to the limited resource, some features are impossible to be extract in the real time, the functionality using those features should be redesigned to use simpler features. Once the Digital TV broadcast with MPEG-7 descriptions become available, the feature extraction part of the Video-Gadget (TM) will be employed by the MPEG-7 description generation server or the service provider and only the retrieval engine including search, browsing, and filtering functionality will remain in the client part.

关键词： MPEG-7 multimedia video indexing browsing search set-top digital TV

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4th IFIP/IEEE International conference on Management of multimedia Networks and Services, MMNS 2001

4th IFIP/IEEE International Conference on Management of Mult...

引用

4th IFIP/IEEE International conference on Management of multimedia Networks and Services, MMNS 2001

ISBN: (纸本)9783540455080

The proceedings contain 29 papers. The special focus in this conference is on Management of multimedia Traffic Streaming, Resource Management in Wireless multimedia, QOS Management on the Internet and Poster Session. The topics include: A hysteresis based approach for quality, frame rate, and buffer management for video streaming using TCP;a transmission scheme for streaming variable bit rate video over internet;mpeg-4 video transfer with TCP-friendly rate control;IP radio resource control system;analysis of random access protocol under bursty traffic;a practical model for VBR video traffic with applications;enhancing quality of mpeg video through partially reliable transport service in interactive application;delivering of mpeg-4 multimedia content over next generation internet;video skimming and summarization based on principal component analysis;distributed resource management to support distributed application-specific quality of service;implementation of a bandwidth broker for dynamic end-to-end capacity reservation over multiple diffserv domains;the impact of confidentiality on quality of service in heterogeneous voice over IP networks;queue length based fair queueing in core-stateless networks;study of TCP and UDP flows in a differentiated services network using two markers system;equation-based dynamic shaping algorithm;a novel content-based video streaming algorithm for fine granular scalable coding;topological synthesis of mobile backbone networks for managing ad hoc wireless networks;a framework for supporting intelligent fault and performance management for communication networks and a framework for event correlation in communication systems.

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An adaptive channel estimator for CDMA systems in multipath fading channels

An adaptive channel estimator for CDMA systems in multipath ...

引用

IEEE International conference on Acoustics, Speech, and Signal Processing

作者： Mo, S Mathews, VJ Amer Microsyst Inc Pocatello ID 83201 USA

ISBN: (纸本)0780370414

CDMA systems in multipath fading channels need to estimate channel parameters for coherent detection of the transmitted signals. In this paper we present a simple but effective channel estimation algorithm that can be incorporated into most types of multiuser receivers to obtain good detection performance. This technique uses a set of correlation filters to independently estimate each of the channel parameters. One advantage our method has over subspace-based algorithms for channel estimation is that it can estimate the channel parameters without phase or amplitude ambiguity. Simulation results demonstrating that our channel estimator is capable of tracking reasonably fast fading channels are also presented in the paper.

关键词： Code division multiple access

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Proceedings of SPIE: Enabling technologies for 3G and beyond

Proceedings of SPIE: Enabling technologies for 3G and beyond

引用

Enabling Technologies for 3G and Beyond

The proceedings contains 16 papers from the conference of SPIE: Enabling Technologies for 3G and Beyond. Topics discussed include: channel coding performance of multitone CDMA system;unequal error protection method for packet video transmission over wireless CDMA channels;pedestrian navigation system using XML-based data;radio resource management for CDMA systems with interference guard margin (IGM);novel power control scheme for multimedia CDMA transmission;and efficient algorithms for broadband space-time-coded wireless communications.

关键词： Code division multiple access

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9th International conference on Cooperative Information systems, CoopIS 2001

引用

9th International conference on Cooperative Information systems, CoopIS 2001

ISBN: (纸本)3540425241

The proceedings contain 32 papers. The special focus in this conference is on Agent systems, Information Integration, Middleware, Platforms, Architectures and Federated Database systems. The topics include: A database infrastructure for schema manipulation;the evolution of distributed component architectures;extending multi-agent cooperation by overhearing;local distributed agent matchmaking;deploying distributed state information in mobile agent systems;cooperative meeting scheduling among agents based on multiple negotiations;automated discovery of content for virtual databases;planning and optimizing semantic information requests using domain modeling and resource characteristics;integrating view schemata using an extended object definition language;a self-organizing access structure for p2p information systems;moving active functionality from centralized to open distributed heterogeneous environments;supporting heterogeneous users in collaborative virtual environments using AOP;a process service model for dynamic enterprise process interconnection;employing multiuser interactions in the development of synchronous applications;schema design and query processing in a federated multimedia database system;an approach to increase concurrency in multidatabase systems;checking integrity constraints in multidatabase systems with nested transactions;an architecture template for inter-enterprise information systems;coordinating web-based systems with documents in XMLspaces;validating an access cost model for wide area applications;on demand business-to-business integration;an accurate and scalable web-based recommendation system and the use of machine-generated ontologies in dynamic information seeking.

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WCDMA for UMTS : radio access for third generation mobile communications /

引用

2001年

作者： Holma Harri

ISBN: (纸本)0471486876

From the Publisher: WCDMA for UMTS provides a complete picture of the Wideband CDMA (Code Division Multiple access) air interface of the 3rd generation cellular systems - UMTS (Universal Mobile Telecommunications systems). WCDMA is designed for multimedia communications including high quality images and video, and access to services with high data rates. These capabilities will create new business opportunities for manufacturers, operators and for the providers of content and applications. * Explains the key parts of the WCDMA standard and provides guidelines for its efficient use * Presents network dimensioning and coverage and capacity planning of WCDMA * Introduces radio resource management algorithms in the WCDMA network * Examines the coverage and capacity of WCDMA up to 2Mbps using numerous simulation results * Introduces the TDD (Time Divisions Duplex) mode * Discusses the co-existence of TDD and FDD (Frequency Divisions Duplex) and highlights their main differences Now includes the main modifications made to the 3GPP standard up until the end of 2000 and features the following new material: * Reference terminal classes * Current status of UMTS licensing * Capacity upgrade paths and capacity per km2 * Inter-frequency handovers and inter-system handovers to GSM * Antenna diversity gain measurements in the WCDMA experimental system Written by leading experts in the field, this practical approach to the key features in WCDMA will have wide-ranging appeal to Research and Development Engineers, Practising Engineers, Cellular Operators, Technical Managers and Students on Telecommunications courses.

关键词： Code division multiple access. Wireless communication systems Standards. Mobile communication systems Standards. Global system for mobile communications.

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