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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Junfeng Jiang Xiao-Ping Zhang Alexander C. Loui Department of Electrical and Computer Engineering Ryerson University Toronto ONT Canada Kodak Research Laboratories Eastman Kodak (Japan) Limited Rochester NY USA

In this paper, we propose a novel video similarity measure model using video time density function (VTDF) and dynamic programming. First, we employ VTDF to describe the density of video activities in time domain by calculating the inter-frame mutual information. Second, a temporal partition solution is applied to divide each video sequence into equi-sized temporal segments. Third, a new VTDF based similarity measure using correlation is calculated to measure the similarity between two temporal segments. Fourth, dynamic programming is then developed to find the optimal non-linear mapping between two video sequences. A new normalized similarity measure function combing both visual characteristics and temporal information together is to evaluate the semantic similarity of two video sequences. Experimental results show that the proposed measurement model is effective to explore the semantic similarity of video sequences.

关键词： Video sequences Dynamic programming Semantics Correlation Image color analysis Streaming media transform coding

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Exploiting contextual information for rank aggregation

Exploiting contextual information for rank aggregation

引用

IEEE International Conference on Image Processing

作者： Daniel Carlos Guimarães Pedronette Ricardo da S. Torres Recod Lab-Institute of Computing State University of Campinas-UNICAMP Campinas Brazil

This paper presents a novel rank aggregation approach based on contextual information aiming to improve the effectiveness of Content-Based Image Retrieval (CBIR) tasks. In our approach, information encoded in both distances among images and ranked lists computed by CBIR systems are used for analyzing contextual information and then re-rank collection images. We conducted several experiments involving shape, color, and texture descriptors. We also evaluated our method in comparison to other rank aggregation approaches. Experimental results demonstrate the effectiveness of our method.

关键词： Shape Context Image color analysis transform coding Computational fluid dynamics Image retrieval

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Generating MPEG 7 audio descriptor for content-based retrieval

Generating MPEG 7 audio descriptor for content-based retriev...

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IEEE Recent Advances in Intelligent Computational Systems (RAICS)

作者： M. Karpaka Murthy S. Seetha Flávio L. C. Pádua Karunya Institute of Technology and Sciences Coimbatore Tamil Nadu IN Professor Department of Computer Egineering CEFET-MG Brazil

The problem of classification of continuous general data for content based retrieval and describe the scheme that able to classify the audio segments based on the MPEG-7 audio descriptors and description schemes that consist of tools for indexing audio media using probabilistic sound models. The descriptors provide containers for category labels as well as data structures for quantitative information about sound content. We describe the normative tools as well as informative methods for automatic description extraction.

关键词： transform coding Harmonic analysis Power harmonic filters Feature extraction XML Encoding Speech

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Fast identification of JPEG 2000 images for digital cinema profiles

Fast identification of JPEG 2000 images for digital cinema p...

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International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

作者： Osamu Watanabe Takahiro Fukuhara Hitoshi Kiya Department of Electronics & Computer Systems Takushoku University Hachioji Tokyo Japan CPDG PSG Sony Corporation Atsugi Kanagawa Japan Department of Information and Communication Systems Engineering Tokyo Metropolitan University Hino Tokyo Japan

ISBN: (纸本)9781457705380

A method for identifying JPEG 2000 images with different coding parameters, such as DWT-filters, code-block sizes, quantization step sizes, and resolution levels, is presented. The proposed method does not produce false-negative matches regardless of the different coding parameters. Moreover, the proposed method is fast because it uses the number of zero-bit-planes. This number can be extracted from the JPEG 2000 codestream by only parsing the header information. Experimental results showed the effectiveness of the proposed method for digital cinema applications.

关键词： transform coding Discrete wavelet transforms Image coding Databases Motion pictures Image resolution Decoding

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Robust video watermarking against JPEG compression in 3D-DWT domain

Robust video watermarking against JPEG compression in 3D-DWT...

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International Symposium on Information Assurance and Security (IAS)

作者： Yadollah Zamanidoost Antonio Navarro Zhinoos Razavi Hesabi Nima Rahimi Froshani Fatemeh Farnia Department of Electrical Engineering Iran University of Science and Technology Tehran Iran Institute of Telecommunications University of Aveiro Aveiro Portugal Department of Electrical Engineering Islamic Azad University of Arak Arak Iran Department of Electrical Engineering Islamic Azad University of Mashhad Mashhad Iran

A 3D-DWT video watermarking technique is proposed in this article. The algorithm is implemented on the basis of human vision system (HVS). To improve the robustness of watermark against JPEG compression, the most recently proposed techniques embed watermark in to the low-frequency components of the video frames. However, these components hold significant information of the video. Directly replacing the low-frequency components with watermark may introduce undesirable degradation to video quality. Simulation results demonstrate that the embedded watermarks can be almost fully extracted from the JPEG-compressed frames with very high compression ratio. Furthermore, the algorithm is robust against uniform noise attack, frame dropping and frame swapping.

关键词： Watermarking Robustness transform coding PSNR Q factor Image coding transforms

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Standard-compliant content adaptation in IPTV systems

Standard-compliant content adaptation in IPTV systems

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International Conference on Advanced Technologies for Communications, ATC

作者： Truong Cong Thang Jung Won Kang Anh T. Pham The University of Aizu Japan Electronics and Telecommunications Research Institute Korea

IPTV, which is based on the universal IP infrastructure, has the inherent nature of heterogeneity in terms of contents, networks, terminals, and users. An important solution to cope with such heterogeneity is content adaptation. This paper reviews the standardization issues related to content adaptation in IPTV standards. We first describe the basic architecture of content adaptation and its integration into the ITU-T IPTV architecture. Then typical methods of content adaptation in practical IPTV systems are discussed in detail. Especially, we highlight the standard metadata tools that are potential to support adaptation methods within ITU-T IPTV architecture. Some recent developments in other standard bodies are also discussed.

关键词： IPTV transform coding Engines Encoding Visualization Standards Bit rate

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Control of unmanned flying vehicle based on MPEG-V international standard

Control of unmanned flying vehicle based on MPEG-V internati...

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International Conference on Ubiquitous Robots and Ambient Intelligence (URAI)

作者： Kyoungro Yoon Doohyun Kim Young-Guk Ha School of Computer Science and Engineering Konkuk University Seoul South Korea School of Internet and Media Engineering Konkuk University Seoul South Korea

ISBN: (纸本)9781457707223

MPEG has been developing MPEG-V standard to synchronize real world and virtual world. The MPEG-V Part 5, specifically, provides standardized interface to send commands to the actuators and to receive information from the sensors. This paper proposes interace for Global position command, global position sensor, and altitude sensor in XML schema to control the unmanned flying vehicles. We also implemented the land station so that the position of the flying vehicle can be displayed on the screen in real time and the user can control the flying vehicle through the user interface.

关键词： Vehicles transform coding User interfaces Synchronization Syntactics Sensor phenomena and characterization

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Impact of inserting a stochastic noise on the visual information in a bitmap

Impact of inserting a stochastic noise on the visual informa...

引用

Proceedings of the International Convention MIPRO

作者： M. Köhler I. Lukić N. Slavek Faculty of Electrical Engineering Osijek Josip Juraj Strossmayer University of Osijek Osijek Croatia

This paper explains reasons for choosing a bitmap (BMP) as the basic format for inserting large amounts of additional information into the image. Structure of the BMP format is explained and shown on examples. Formula for calculating the difference of two images is proposed. Experiments were conducted on adding information to the bits of different weights in the bitmap. From the test results, conclusions were derived about the impact of adding information on the quality of original bitmap image.

关键词： Pixel Image color analysis Visualization transform coding Image coding Noise

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Dynamic adaptive HTTP streaming of live content

Dynamic adaptive HTTP streaming of live content

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IEEE International Symposium on World of Wireless Mobile and Multimedia Networks (WoWMoM)

作者： Thorsten Lohmar Torbjörn Einarsson Per Fröjdh Frédéric Gabin Markus Kampmann Ericsson GmbH Herzogenrath Germany Ericsson AB Stockholm Sweden Ericsson France Massy France

MPEG has recently released a first public draft of the new Dynamic Adaptive Streaming over HTTP (DASH) specification. The new streaming technique is based on the 3GPP and partly also on the Open IPTV Forum (OIPF) specifications. In this paper, we give an overview about the new DASH specification with a special focus on Live streaming services. In order to re-use existing web content distribution schemes, the new streaming technique provides the live stream as a sequence of files, which are continuously downloaded by the streaming client. This way of streaming introduces new delay components into the system streaming. Live Streaming technology is often used for events like sport events to allow other users to virtually participate. It is generally preferred to minimize the end-to-end delay for live services. In the paper, we identify and analyze the different delay components of the new adaptive HTTP streaming technique and how they contribute to the end-to-end delay of live services. We also discuss the dependencies and system implications when minimizing the end to end delay. The evaluation principles are also applicable for other adaptive HTTP streaming formats.

关键词： Media transform coding Delay Servers Availability Streaming media Bit rate

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A Replacement Technique to Maximize Task Reuse in Reconfigurable Systems

A Replacement Technique to Maximize Task Reuse in Reconfigur...

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IEEE International Symposium on Parallel and Distributed Processing Workshops and Phd Forum (IPDPSW)

作者： Juan Antonio Clemente Daniel Mozos Javier Resano Departamento de Arquitectura de Computadores y Automática (DACyA) Universidad Complutense de Madrid Madrid Spain Departamento de Informática e Ingeniería de Sistemas Universidad de Zaragoza Zaragoza Spain

Dynamically reconfigurable hardware is a promising technology that combines in the same device both the high performance and the flexibility that many recent applications demand. However, one of its main drawbacks is the reconfiguration overhead, which involves important delays in the task execution, usually in the order of hundreds of milliseconds, as well as high energy consumption. One of the most powerful ways to tackle this problem is configuration reuse, since reusing a task does not involve any reconfiguration overhead. In this paper we propose a configuration replacement policy for reconfigurable systems that maximizes task reuse in highly dynamic environments. We have integrated this policy in an external task-graph execution manager that applies task prefetch by loading and executing the tasks as soon as possible (ASAP). However, we have also modified this ASAP technique in order to make the replacements more flexible, by taking into account the mobility of the tasks and delaying some of the reconfigurations. In addition, this replacement policy is a hybrid design-time/run-time approach, which performs the bulk of the computations at design time in order to save run-time computations. Our results illustrate that the proposed strategy outperforms other state-of- the-art replacement policies in terms of reuse rates and achieves near-optimal reconfiguration overhead reductions. In addition, by performing the bulk of the computations at design time, we reduce the execution time of the replacement technique by 10 times with respect to an equivalent purely run-time one.

关键词： transform coding Delay Dynamic scheduling Schedules Field programmable gate arrays Prefetching Loading

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