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Real-time content-based processing of multicast video

Real-time content-based processing of multicast video

引用

Proceedings of the 1998 32nd Asilomar conference on Signals, systems & Computers. Part 1 (of 2)

作者： Zhou, Wensheng Vellaikal, Asha Shen, Ye Kuo, Jay C.-C. LLC Malibu United States

The access of high bandwidth multimedia data is generally limited to the network due to the limited network resources, inefficient indexing mechanism and less of semantic interpretations. Currently, most content-based video content representation involves the segmentation and indexing of video based on scene change and camera/object motion, and such research generally performs off-line video processing. Little research has been done on on-line video processing, which is crucial in video communication applications such as video conferencing, video multicasting and on-line video browsing and retrieval. Our research investigates real-time content-based processing of multicast video over the Internet. New on-line video feature extraction schemes, such as scene change detection, on-line key frame classification, are considered to meet the requirement of real-time video multicasting filtering based on user's profile over the Internet. The annotation and features extracted from multicasted videoconference bitstream by the on-line video content analysis proxies, which are using the proposed video processing algorithms, are output to a separate metadata channel for the further assistance of semantic multicasting of video content. The performance of the proposed algorithms is also demonstrated in the paper.

关键词： multimedia systems

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MPEG-4 - The emerging multimedia standard (invited)

MPEG-4 - The emerging multimedia standard (invited)

引用

2nd IEEE International Caracas conference on Devices, Circuits and systems (ICCDCS 98)

作者： Rao, KR Univ Texas Dept Elect Engn Arlington TX 76019 USA

ISBN: (纸本)0780344340

This paper presents an overview of the aims and objectives of MPEG-4. This standard scheduled for November 1998 addresses content-based interactivity, universal access, robustness in error-prone environments, manipulation of objects, both synthetic and natural, etc., at various bit rates, quality levels and spatial/temporal resolutions. The standard is designed to accommodate different communication networks, processors and platforms through tools, algorithms and profiles.

关键词： Image coding

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content-based video retrieval via motion trajectories

Content-based video retrieval via motion trajectories

引用

Proceedings of the 1998 conference on Electronic Imaging and multimedia systems ii

作者： Shan, Man-Kwan Lee, Suh-Yin Natl Chiao Tung Univ HsinChu Taiwan

Motion is one of the most prominent features of video. For content-based video retrieval, motion trajectory is the intuitive specification of motion features. In this paper, approaches for video retrieval via single motion trajectory and multiple motion trajectories are addressed. For the retrieval via single motion trajectory, the trajectory is modeled as a sequence of segments and each segment is represented as the slope. Two quantitative similarity measures and corresponding algorithms based on the sequence similarity are presented. For the retrieval via multiple motion trajectories, the trajectories of the video are modeled as a sequence of symbolic pictures. Four quantitative similarity measures and algorithms, which are also based on the sequence similarity, are proposed. All the proposed algorithms are developed based on the dynamic programming approach.

关键词： Pattern matching

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Multidimensional indexing for content-based image retrieval

Multidimensional indexing for content-based image retrieval

引用

Proceedings of the 1998 conference on Electronic Imaging and multimedia systems ii

作者： Zhao, J. Leon Kwok, S.H. Hong Kong Univ of Science and Technology Kowloon Hong Kong

Based on the blobworld method, we propose a blob-centric image querying scheme that is comprised of several new techniques in content-based image retrieval. We report our research results in the database structure and maintenance algorithms for image indexing. We further conduct a performance comparison of image retrieval efficiency for three possible image retrieval methods, the naive method, the representative-blobs method, and the indexing method. Our quantitative analysis shows over 90% reduction in query response time by using the representative-blobs method and the indexing method.

关键词： Pattern matching

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content-based representative frame extraction for digital video

Content-based representative frame extraction for digital vi...

引用

IEEE International conference on multimedia Computing and systems (ICMCS)

作者： Xinding Sun M.S. Kankanhalli Yongwei Zhu Jiankang Wu RWC Novel Function ISS Lab Kent Ridge Digital Laboratories Singapore Singapore Department of Electrical Engineering Indian Institute of Science Bangalore India

We consider a content-based adaptive clustering algorithm (CBAC) to extract a fixed pre-determined number of representative frames to summarize a given digital video. In our algorithm, shot boundary detection is not needed. The inter-frame changes are compared globally for the extraction of representative frames. Small units of the video are dynamically clustered into two clusters based on the amount of change in content within the unit. One cluster, which has units of low content change, is designated for deletion and the other cluster, which has units of high content change, is for retention. The algorithm adaptively converges to the desired number of frames by deleting some redundant frames from each unit of the deletion cluster during every iteration.

关键词： Gunshot detection systems Motion detection Random access memory Ferroelectric films Nonvolatile memory Sun Clustering algorithms Shape HTML Video sequences

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Real-time content-based processing of multicast video

Real-time content-based processing of multicast video

引用

Asilomar conference on Signals, systems & Computers

作者： Wensheng Zhou A. Vellaikal Ye Shen J.C.-C. Kuo Information Sciences Lab HRL Laboratories LLC Malibu CA USA Integrated Media System Center Department of Electrical Engineering-Systems University of Southern California Los Angeles CA USA

The access of high bandwidth multimedia data is generally limited to the network due to the limited network resources, inefficient indexing mechanism and less of semantic interpretations. Currently, most content-based video content representation involves the segmentation and indexing of video based on scene change and camera/object motion, and such research generally performs off-line video processing. Little research has been done on on-line video processing, which is crucial in video communication applications such as video conferencing, video multicasting and on-line video browsing and retrieval. This research investigates real-time content-based processing of multicast video over the Internet. New on-line video feature extraction schemes, such as scene change detection, on-line key frame classification, are considered to meet the requirement of real-time video multicasting filtering based on the user's profile over the Internet. The annotation and features extracted from a multicast videoconference bitstream by the on-line video content analysis proxies, which are using the proposed video processing algorithms, are output to a separate metadata channel for the further assistance of semantic multicasting of video content. The performance of the proposed algorithms is also demonstrated.

关键词： Videoconference Indexing Layout Internet Feature extraction Multicast algorithms Bandwidth Cameras Information filtering Information filters

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MPEG-4-the emerging multimedia standard

MPEG-4-the emerging multimedia standard

引用

IEEE International Caracas conference on Devices, Circuits and systems

作者： K.R. Rao Electrical Engineering Department of Electrical Engineering University of Texas Arlington Arlington TX USA

关键词： MPEG 4 Standard Scalability Job shop scheduling Shape Virtual manufacturing Layout Processor scheduling Robustness Bit rate Information retrieval

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multimedia summaries of broadcast news

Multimedia summaries of broadcast news

引用

conference on Intelligent Information systems (iiS 97)

作者： Maybury, MT Merlino, AE Mitre Corp Adv Informat Syst Ctr Bedford MA 01730 USA

ISBN: (纸本)0818682183

Increasing amounts of text, audio, and video content has fueled efforts to provide direct, content based access to these materials. Summaries are often necessary to enable timely relevancy assessments, information extraction, or information analysis from source material. Whereas text summarization research is receiving increasing attention, comparatively few investigators have examined video summarization. This paper reports on the extension of a broadcast news access system to provide multimedia summaries. We briefly overview our system for video analysis, focusing on our novel integration of image, speech and language processing techniques to support automated video summarization. We outline algorithms for proper name and keyphrase extraction, story segmentation, and key frame extraction which together underpin our current ability to automatically summarize video. We describe the systems ability to generate multimedia video summaries tailored to a user query. We discuss evaluation metrics for measuring the (quality) value of these summary artifacts.

关键词： content-based video access video summarization broadcast news

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Hierarchical temporal video segmentation and content characterization

Hierarchical temporal video segmentation and content charact...

引用

conference on multimedia Storage and Archiving systems ii

作者： Gunsel, B Fu, Y Tekalp, AM Univ. of Rochester (United States)

ISBN: (纸本)0819426628

This paper addresses the segmentation of a video sequence into shots, specification of edit effects and subsequent characterization of shots in terms of color and motion content. The proposed scheme uses DC images extracted from MPEG compressed video and performs an unsupervised clustering for the extraction of camera shots. The specification of edit effects, such as fade-in/out and dissolve is based on the analysis of distribution of mean value for the luminance components. This step is followed by the representation of visual content of temporal segments in terms of key frames selected by similarity analysis of mean color histograms. For characterization of the similar temporal segments, motion and color characteristics are classified into different categories using a set of different features derived from motion vectors of triangular meshes and mean histograms of video shots.

关键词： video databases content-based access shot detection edit effects content characterization

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Automated document content characterization for a multimedia document retrieval system

Automated document content characterization for a multimedia...

引用

conference on multimedia Storage and Archiving systems ii

作者： Koivusaari, M Sauvola, J Pietikainen, M Univ. of Oulu (Finland)

ISBN: (纸本)0819426628

We propose a new approach to automate document image layout extraction for an object-oriented database feature population using rapid low level feature analysis, preclassification and predictive coding. The layout information comprised of region location and classification data is transformed into 'feature object(s)'. The information is then fed into an intelligent document image retrieval system (IDIR) to be utilized in document retrieval schemes. The IDIR system consists of user interface, object-oriented database and a variety of document image analysis algorithms. In this paper the object-oriented storage model and the database system are presented in formal and functional domains. Moreover, the graphical user interface and a visual document image browser are described. The document analysis techniques used at document characterization are also presented. In this context the documents consist of text, picture and other media (possibly embedded) data. Documents are stored in the database as document, page and region objects. Our test system has been implemented and tested using a document database of 10 000 documents.

关键词： document layout analysis predictive coding document database retrieval document content characterization object-oriented database

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