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Information Technology: Coding and Computing, 2001. Proceedings. International Conference on

Date 2-4 April 2001

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Displaying Results 1 - 25 of 126
  • International Conference On Information Technology: Coding And Computing [front matter]

    Publication Year: 2001, Page(s):i - xii
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    Freely Available from IEEE
  • Special session on media streaming [session intro.]

    Publication Year: 2001, Page(s): 1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (93 KB)

    Summary form only given. This special session is devoted to address some of the main technological challenges for media streaming, including rate-adaptation and scalable coding for heterogeneous networks, QoS (quality of service) and congestion control, streaming systems and architectures, and packet-loss resilient coding and transport. View full abstract»

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  • Author index

    Publication Year: 2001, Page(s):695 - 698
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    Freely Available from IEEE
  • HTTP streaming of JPEG2000 images

    Publication Year: 2001, Page(s):15 - 19
    Cited by:  Patents (78)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (364 KB) | HTML iconHTML

    JPEG2000 is a new image compression standard. One of the goals of JPEG2000 is to support large images. Since even the compressed image file can be very big for large images, downloading the entire image can take a long time depending upon the user's connection speed. Thus, we propose to use streaming of JPEG2000 images. We use the Hypertext Transfer Protocol (HTTP) for streaming. The use of HTTP t... View full abstract»

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  • FEC-based video streaming over packet loss networks with pre-interleaving

    Publication Year: 2001, Page(s):10 - 14
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    The authors present a FEC-based end-to-end error control scheme for video streaming over packet loss networks. We propose a novel robust video streaming system in which an interleaving is applied to the compressed bitstream before channel coding. The application of such preinterleaving is able to improve the performance of video streaming over packet loss networks because pre-interleaving can simu... View full abstract»

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  • Reactive and proactive approaches to media streaming: from scalable coding to content delivery networks

    Publication Year: 2001, Page(s):5 - 9
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB) | HTML iconHTML

    For an end-to-end media streaming system, the Internet can be considered a back box in the middle that connects a client at one end to the server at the other end. We present both ends' views of the streaming problems and review two approaches to these problems. The first approach, which is represented by scalable coding, is reactive in nature because it seeks to best adapt to changing network con... View full abstract»

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  • Watermarking for multilevel access to statistical databases

    Publication Year: 2001, Page(s):243 - 247
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB) | HTML iconHTML

    Increased corporate, government and academic demand has prompted official statistics to release individual respondent data (microdata) in addition to the traditional tabular data. Microdata must be masked by a statistical disclosure control (SDC) method before being published, because otherwise the statistical confidentiality of respondents would be compromised. A novel application of watermarking... View full abstract»

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  • Modified Patchwork Algorithm: a novel audio watermarking scheme

    Publication Year: 2001, Page(s):237 - 242
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB) | HTML iconHTML

    This paper presents the MPA (Modified Patchwork Algorithm), a statistical technique for audio watermarking in the transform domain, especially in DCT (discrete cosine transform) domain. The MPA is an extension of the patchwork algorithm. This algorithm with some sophisticated modifications is robust to withstand the type of attacks defined by SDMI (Secure Digital Music Initiative). In addition, it... View full abstract»

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  • An objective comparison between spatial and DCT watermarking schemes for MPEG video

    Publication Year: 2001, Page(s):207 - 211
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB) | HTML iconHTML

    Digital watermarking is an important emerging technique for intellectual property rights protection. We classify spread-spectrum watermarking techniques for MPEG video into two generic classes, namely spatial watermarking and DCT (discrete cosine transform) watermarking schemes, and evaluate their robustness and visual quality quantitatively and comparatively. Blind watermark detection and some wa... View full abstract»

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  • A comparison of search patterns for cooperative robots operating in remote environment

    Publication Year: 2001, Page(s):668 - 672
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    In this paper, two scanning paradigms are presented and compared that may be used for robotic scanning of a harsh environment such as a celestial body or earth poles. The first paradigm, tight scanning, includes three algorithms, which may be used to find small objects or gasses confined to small regions such as the methane gas given off by bacteria in buried hot springs in the Canadian arctic. Th... View full abstract»

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  • Model-based human body motion analysis for MPEG IV video encoder

    Publication Year: 2001, Page(s):435 - 439
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB) | HTML iconHTML

    A real-time model-based human motion analysis system is developed to track and analyze the motion of a human object in a video sequence in terms of body definition parameters (BDPs) and body animation parameters (BAPs) for a MPEG IV video encoder View full abstract»

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  • Adaptive thresholding of document images based on Laplacian sign

    Publication Year: 2001, Page(s):501 - 505
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB) | HTML iconHTML

    We present a new technique for document image binarization to manage different situations in an image. The problems of image binarization caused by illumination, contrast, noise and much source type-related degradation are addressed. A new technique is applied to determine a local threshold for each pixel. The idea of our technique is to update locally the threshold value whenever the Laplacian si... View full abstract»

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  • A vector watermarking using the generalized square mask

    Publication Year: 2001, Page(s):234 - 236
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB) | HTML iconHTML

    Presents an algorithm for watermark insertion and extraction in a vector image. Most parts of the vector image consist of an array of coordinate values. First, the image is partitioned into blocks with the same area, and every vertex coordinate value within a block is changed to a new coordinate value whose origin is at the south-west vertex of the mask belonging to the associated block. The inser... View full abstract»

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  • CAS: Context Adaptive Search for motion estimation

    Publication Year: 2001, Page(s):202 - 206
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB) | HTML iconHTML

    Motion estimation is the key part of a video encoder. It helps to remove temporal redundancies in image sequences, but most motion estimation algorithms neglect to take the advantage of the string correlations within the motion fields. The search windows stay the same through the image sequences and the estimation needs heavy computation. To reduce this computational complexity, several algorithms... View full abstract»

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  • An overview of MPEG-4 object-based encoding algorithms

    Publication Year: 2001, Page(s):366 - 369
    Cited by:  Patents (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (352 KB) | HTML iconHTML

    Describes several object-based encoding issues and provides solutions based on the MPEG-4 coding standard. Specifically, we first consider the general problem of object-based rate control and the allocation of bits among each object. Going a step further, we then discuss the issues related to the allocation of bits between shape and texture, and propose a method to model the rate distortion charac... View full abstract»

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  • The choice of watermark domain in the presence of compression

    Publication Year: 2001, Page(s):79 - 84
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB) | HTML iconHTML

    We determine the watermark domain that maximizes data hiding capacity. We focus on the situation in which the watermarked signal undergoes lossy compression involving quantization in a specified compression domain. A novel linear model for the process of quantization is proposed which leads to analytical results estimating the data hiding capacity for various watermarking domains. Using this frame... View full abstract»

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  • A rule-based system for localization of water on the surface of Mars

    Publication Year: 2001, Page(s):662 - 667
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB) | HTML iconHTML

    In order to use autonomous robots to search for water on the Martian surface, several concerns are raised that need to be addressed, analyzed and remedied. These concerns include the development of a suitable scanning algorithm, positioning system, and obstacle handling. We investigate the above mentioned concerns and propose remedies for them. Also, the remedies are tested by a simulation process... View full abstract»

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  • Working documents automatic generation using an adaptive editor

    Publication Year: 2001, Page(s):426 - 431
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (556 KB) | HTML iconHTML

    The production process of documents was deeply transformed by the information technology influence on document writing activities. The wide use of personal computers produced a transformation of the document creation process. It is becoming a process of transformation and aggregation of documents. The different phases of this process are becoming more rapid due to the reusability of available docu... View full abstract»

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  • Optimal maximal encoding different from Huffman encoding

    Publication Year: 2001, Page(s):493 - 497
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB) | HTML iconHTML

    Novel maximal encoding, encoding, and maximal prefix encoding different from Huffman encoding are introduced. It is proven that for finite source alphabets all Huffman codes are optimal maximal codes, codes, and maximal prefix codes. Conversely, the above three types optimal codes need not to be the Huffman codes. Completely similar to Huffman codes, we prove that for every random variable with a ... View full abstract»

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  • A novel approach for increasing security and data embedding capacity in images for data hiding applications

    Publication Year: 2001, Page(s):228 - 233
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB) | HTML iconHTML

    Data hiding in multimedia is the process of secretly embedding information into data sources such as image, video, or audio signals without changing the perceptual quality of the data source. We present a novel blind data hiding technique for hiding information in still images. This technique is based on embedding the information in the transform domain, after decorrelating the samples in the spat... View full abstract»

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  • Advanced 3b4b channel coding for low error-rate optical links at 2.488 Gbit/s

    Publication Year: 2001, Page(s):524 - 528
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    We report on the performance of an optimized parallel channel coder for high-speed optical transmission systems. The coding properties are discussed by an evaluation of the signal statistics of the coded pulse train in the time and frequency domain. The discussion is mainly based on the results for the power spectral density (PSD) and the autocorrelation function (AKF). The theoretical investigati... View full abstract»

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  • Estimating correspondence in digital video

    Publication Year: 2001, Page(s):196 - 201
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB) | HTML iconHTML

    This paper addresses several estimation problems involving correspondence in digital video. We present three cases, in order of increasing complexity: affine transformations, projective transformations, and general correspondence. We review some recent research in the first two cases and present a new framework for discussing the third case. We also discuss how to use the formalism of corresponden... View full abstract»

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  • Thermal microactuators for optical purpose

    Publication Year: 2001, Page(s):137 - 142
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB) | HTML iconHTML

    The core of the project was to design a moveable micromirror array with the most optimal dependence of the optically active area, the deflection angles and the micromirror power consumption. The matrix of 10×20 micromirrors uses a thermal actuated principle. The micromirror was designed using an industrial 0.8 μm double metal CMOS process followed by one single postprocessing step and ani... View full abstract»

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  • Technologies for 3G wireless communications

    Publication Year: 2001, Page(s):162 - 166
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB) | HTML iconHTML

    Discusses and compares three prominent contenders for 3G wireless communication. These are: OFDM (orthogonal frequency division multiplexing), CDMA (code division multiple access) and MC-CDMA (multi-carrier CDMA) - a hybrid of the first two. OFDM has gained increasing acceptance as an alternative to single-carrier modulation for wireless systems. Potential exists for very high bit rates and for re... View full abstract»

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  • A general framework for networked multimedia applications enabling access to laboratory equipment: the LABNET project experience

    Publication Year: 2001, Page(s):359 - 365
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB) | HTML iconHTML

    The issue of accessing remote complex laboratories in a networked environment and performing experiments and measurements in which several applications and diverse devices are involved is addressed. A proposal is described for a common architecture for enhanced multimedia remote device control. The aim is to have the ability to set up a “gate” device that is the structured sum of real ... View full abstract»

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