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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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Ubiquitous picture rich content representation

Ubiquitous picture rich content representation

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Conference on Imaging and Printing in a Web 2.0 World;and multimedia content access - algorithms and systems IV

作者： Wang, Wiley Dean, Jennifer Muzzolini, Russ Shutterfly Inc. (United States)

ISBN: (纸本)9780819479334

The amount of digital images taken by the average consumer is consistently increasing. People enjoy the convenience of storing and sharing their pictures through online (digital) and offline (traditional) media. A set of pictures can be uploaded to: online photo services, web blogs and social network websites. Alternatively, these images can be used to generate: prints, cards, photo books or other photo products. Through uploading and sharing, images are easily transferred from one format to another. And often, a different set of associated content (text, tags) is created across formats. For example, on his web blog, a user may journal his experiences of his recent travel;on his social network website, his friends tag and comment on the pictures;in his online photo album, some pictures are titled and keyword-tagged. When the user wants to tell a complete story, perhaps in a photo book, he must collect, across all formats: the pictures, writings and comments, etc. and organize them in a book format. The user has to arrange the content of his trip in each format. The arrangement, the associations between the images, tags, keywords and text, cannot be shared with other formats. In this paper, we propose a system that allows the content to be easily created and shared across various digital media formats. We define a uniformed data association structure to connect: images, documents, comments, tags, keywords and other data. This content structure allows the user to switch representation formats without reediting. The framework under each format can emphasize (display or hide) content elements based on preference. For example, a slide show view will emphasize the display of pictures with limited text;a blog view will display highlighted images and journal text;and the photo book will try to fit in all images and text content. In this paper, we will discuss the strategy to associate pictures with text content, so that it can naturally tell a story. We will also list sampl

关键词： photo book photo sharing website content association content representation

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MPEG-4 - The emerging multimedia standard (invited)

MPEG-4 - The emerging multimedia standard (invited)

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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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A unified and efficient framework for court-net sports video analysis using 3-D camera modeling

A unified and efficient framework for court-net sports video...

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Conference on multimedia content access - algorithms and systems

作者： Han, Jungong de With, Peter H. N. Eindhoven Univ Technol POB 513 NL-5600 MB Eindhoven Netherlands RTSE LogicaCMG NL-5605 JB Eindhoven Netherlands

ISBN: (纸本)9780819466198

The extensive amount of video data stored on available media (hard and optical disks) necessitates video content analysis, which is a cornerstone for different user-friendly applications, such as, smart video retrieval and intelligent video summarization. This paper aims at finding a unified and efficient framework for court-net sports video analysis. We concentrate on techniques that are generally applicable for more than one sports type to come to a unified approach. To this end, our framework employs the concept of multi-level analysis, where a novel 3-D camera modeling is utilized to bridge the gap between the object-level and the scene-level analysis. The new 3-D camera modeling is based on collecting features points from two planes, which are perpendicular to each other, so that a true 3-D reference is obtained. Another important contribution is a new tracking algorithm for the objects (i.e. players). The algorithm can track up to four players simultaneously. The complete system contributes to summarization by various forms of information, of which the most important are the moving trajectory and real-speed of each player, as well as 3-D height information of objects and the semantic event segments in a game. We illustrate the performance of the proposed system by evaluating it for a variety of court-net sports videos containing badminton, tennis and volleyball, and we show that the feature detection performance is above 92% and events detection about 90%.

关键词： sports video content analysis camera calibration 3-D modeling tracking feature extraction

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Adaptive and multimodal approach to multimedia content analysis

Adaptive and multimodal approach to multimedia content analy...

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作者： Liu, Zhu Polytechnic University

学位级别：Ph.D.

The volume of multimedia data generated nowadays is exploding. To efficiently access and retrieve desired information, tools that enable automated analysis based on content are becoming indispensable. multimedia content is defined at both perceptual and conceptual levels. The former refers to the content characterized purely by intrinsic perception properties such as color, motion, or acoustic features. The latter refers to the content that is specified based on concepts or semantics such as sunset, anchors, or news headline stories. At both levels, the content is embedded in multiple forms that are usually complimentary to each other. The main objective of this thesis is to adaptively analyze the multimedia content by integrating cues from multiple modalities, including audio, video, and text, mainly in the scope of news broadcast. At the perceptual level, news broadcast data is segmented and classified into different video events such as news reporting and commercials. Audio and visual features are developed and integrated, aiming at discriminating different events effectively. Various classification mechanisms, including linear fuzzy threshold, maximum likelihood using Gaussian Mixture Model and Hidden Markov Model, Neural Network, as well as Support Vector Machine, are benchmarked. At the conceptual level, algorithms and demonstration systems for three applications are developed. In News Broadcast Browsing System, recovering and presentation of the embedded hierarchy structure of news broadcast are addressed. Important semantic objects such as hosting characters and headline news stories are adaptively extracted using the audio/visual models that are bootstrapped from on-line data. The problem of efficient search and retrieval of segmented multimedia objects based on audio is discussed in Query-by-example in Audio System. A distance metric framework is proposed to determine the difference of mixture type Probability Density Functions, and is applied in measuring

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Understanding the Impact of Wi-Fi Configuration on Volumetric Video Streaming Applications

Understanding the Impact of Wi-Fi Configuration on Volumetri...

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SIGCOMM Workshop on Emerging multimedia systems (EMS)

作者： Kulkarni, Umakant Diab, Khaled Aggarwal, Shivang Cao, Lianjie Ahmed, Faraz Sharma, Puneet Fahmy, Sonia Hewlett Packard Labs Palo Alto CA 94304 USA Purdue Univ W Lafayette IN USA

ISBN: (纸本)9798400703034

Emerging multimedia applications often use a wireless LAN (Wi-Fi) infrastructure to stream content. These Wi-Fi deployments vary vastly in terms of their system configurations. In this paper, we take a step toward characterizing the Quality of Experience (QoE) of volumetric video streaming over an enterprise-grade Wi-Fi network to: (i) understand the impact of Wi-Fi control parameters on user QoE, (ii) analyze the relation between Quality of Service (QoS) metrics of Wi-Fi networks and application QoE, and (iii) compare the QoE of volumetric video streaming to traditional 2D video applications. We find that Wi-Fi configuration parameters such as channel width, radio interface, access category, and priority queues are important for optimizing Wi-Fi networks for streaming immersive videos.

关键词： Wi-Fi Volumetric Video Streaming Quality of Service Quality of Experience access Category Channel Width Radio Interface Priority Queues

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Efficient BitTorrent-Like algorithms for Interactive On-Demand multimedia Streaming over MANETs 18

Efficient BitTorrent-Like Algorithms for Interactive On-Dema...

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24th Brazilian Symposium on multimedia and the Web (WebMedia)

作者： da Silva Rodrigues, Carlo Kleber UFABC CMCC Sao Paulo Brazil

ISBN: (纸本)9781450358675

Mobile ad hoc networks pose stringent challenges for the implementation of efficient interactive on-demand streaming systems. Mobile nodes are dynamically and arbitrarily located in such a manner that the interconnections between them change on a continual basis, thereby making timely content delivery hard to achieve. To tackle this issue, we propose two BitTorrent-like algorithms. As innovative aspects, we explore (i) data dispersion, indirect reciprocity, and geographical distance as criteria to select nodes to receive data, and (ii) introduce a sliding window to decide which data segments to request first. By means of simulations on distinct multimedia scenarios, the proposals are evaluated according to four performance metrics. Among the major findings, the results highlight the effectiveness of our proposals compared to a theoretical optimal content-delivery scheme. For instance, it is shown that our proposals yield average download rates which exceed over 23% of the actual needed rate. Within this context, the key contribution of this paper is to provide valuable algorithmic insights for real-world protocol designs targeted at mobile ad hoc networks. Lastly, avenues for further research are included at the end of the paper.

关键词： Streaming MANETs BitTorrent multimedia Interactivity

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A Hybrid Approach to Recommending Universal Decimal Classification Codes for Cataloguing in Slovenian Digital Libraries

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IEEE access 2022年 10卷 85595-85605页

作者： Borovic, Mladen Ojstersek, Milan Strnad, Damjan Univ Maribor Fac Elect Engn & Comp Sci Lab Heterogeneous Comp Syst Maribor 2000 Slovenia Univ Maribor Fac Elect Engn & Comp Sci Lab Geospatial Modelling Multimedia & Artificial Maribor 2000 Slovenia

In this article we present a hybrid approach to recommending the Universal Decimal Classification (UDC) codes for unclassified documents. By recommending UDC codes to librarians, we can provide the decision support as part of a semi-automatic cataloguing process. As current approaches to recommending UDC codes are scarce and limited to certain fields of expertise, our motivation was to create a hybrid approach which covers all fields of expertise within the UDC hierarchy. The cascade hybrid approach combines the BM25 ranking function with a multi-label classifier based on a BERT (Bidirectional Encoder Representations from Transformers) deep neural network architecture. Additionally, lists of the most commonly used UDC codes within a document's origin organization are used as a final content-based filtering method. The BM25 ranking function is used to create an initial list of recommendations. The first cascade step re-ranks the initial list of recommendations using the list of recommendations produced by the multi-label BERT-based classifier. The second cascade step re-ranks the resulting recommendation list from the first cascade step using a list of most commonly used UDC codes within the document's organization. Finally, post-processing steps are applied to obtain the final list of recommended UDC codes. We present in detail the UDC structure, the used text corpus of documents and the functioning of our hybrid recommendation approach. We perform the analysis of the generated recommendation lists for the corpus from the Slovenian Open-access Infrastructure using the metrics hit-ratio, normalized discounted cumulative gain, mean reciprocal rank and mean average precision. Our hybrid recommendation approach improves reference scores of individual methods for these metrics.

关键词： Codes Libraries Recommender systems Filtering Measurement Computer science Labeling Classification algorithms Hybrid recommender systems multi-label classification digital libraries universal decimal classification

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A comparison of opportunistic scheduling algorithms for streaming media in high-speed downlink packet access (HSDPA)

A comparison of opportunistic scheduling algorithms for stre...

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2nd International Workshop on multimedia Interactive Protocols and systems

作者： Farrokh, A Blömer, F Krishnamurthy, V Univ British Columbia Vancouver BC V5Z 1M9 Canada Tech Univ Munich D-8000 Munich Germany

ISBN: (纸本)3540239286

High-Speed Downlink Packet access (HSDPA) is the release 5 extension of WCDMA standard which provides high data rates (up to 10.8 Mbps) by using Adaptive Modulation/Coding (AMC) and fast packet scheduling. This paper presents a comparison of opportunistic scheduling algorithms for streaming media in HSDPA. We first present a discrete event model for HSDPA multimedia system and express stochastic QoS constraints that reflect the requirement for uninterrupted play-out. Next, we present a general structure of the opportunistic scheduling policies which exploit channel and/or buffer content variations for achieving the required QoS. By using computer simulations, we compare the performance of several special cases of the general policy in terms of the maximum number of the users that can be supported with the desired QoS constraint.

关键词： Scheduling algorithms

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QoS-Oriented content Delivery in E-Learning systems

QoS-Oriented Content Delivery in E-Learning Systems

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IEEE International Symposium on IT in Medicine and Education

作者： Xu, Shihong Shen, Hong Univ Adelaide Sch Comp Sci Adelaide SA 5005 Australia

ISBN: (纸本)9781424439294

QoS-oriented content delivery is an important component in en-learning systems. In this paper we study the object placement problem in the parallel-access context for QoS-oriented content delivery. The problem is formulated in terms of bandwidth maximization and further proved to be equivalent to the Fault Tolerant Facility Location Problem (FTFL). In this problem the bandwidth that violates the triangle inequality is measured by a cost function which forms a metric when the shortest-path routing is deployed. Though there have been efficient UFL algorithms with good performance guarantees, the challenge of the FTFL Problem arises due to the conflict of its connectivity requirement (multiple distinct connections) and cost minimization (which leads to identical connections with the minimum cost). We investigate possible solutions for addressing this conflict after giving an overview of the existing techniques. Extension of the problem to the context of QoE-aware multimedia delivery which has important applications in e-learning systems is also discussed.

关键词： Bandwidth

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