Proceedings EC-VIP-MC 2003. 4th EURASIP Conference focused on Video/Image Processing and Multimedia Communications (IEEE Cat. No.03EX667)

2-5 July 2003

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  • Speech signal reconstruction for real-time voice transmission over the Internet

    Publication Year: 2003, Page(s):557 - 562 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (337 KB) | HTML iconHTML

    The interpolation approaches to the shape recovery of a speech signal in transmission over packet switched communications networks are proposed. The samples of a signal fragments are mixed and transmitted in correspondence with standard procedure of packet-switched transmission. After reception a reverse permutation is made. In the case of packet losses missing samples are separated by several sam... View full abstract»

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  • Blind watermarking via low frequency component modification

    Publication Year: 2003, Page(s):701 - 706 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (427 KB) | HTML iconHTML

    In this paper we present a blind low frequency watermarking scheme. We obtain a robustness improvement to most common image processing operations by embedding the watermark in the approximation image of the original image. In order to embed the watermark with minimal loss in image fidelity, the watermark strength is modulated according to the local image characteristics. We generate a visual mask ... View full abstract»

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  • End-to-end performance in all-optical environment

    Publication Year: 2003, Page(s):551 - 556 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB) | HTML iconHTML

    The optical packet switching networks are the alternative to respond to the explosion of the transported traffic amount. The important step to the adoption of such network is their performance evaluation. In this paper, we focus on an end-to-end performance analysis of synchronous optical packet switching network, especially on PLR, delay and jitter. View full abstract»

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  • Improving the performance in multimedia streaming networks: a differentiated service approach

    Publication Year: 2003, Page(s):841 - 849 vol.2
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (666 KB) | HTML iconHTML

    The best-effort service model supported by the Internet, works very well with conventional Internet applications like file transfer, electronic mail, and Web browsing because of their ability to cope with packet losses and varying packet delays, but does not guarantee bandwidth, low latency and timely delivery of packets. But Internet, with the recent growth trends in bandwidth availability, is ev... View full abstract»

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  • Testing the H.264 error-resilience on wireless ad-hoc networks

    Publication Year: 2003, Page(s):789 - 796 vol.2
    Cited by:  Papers (11)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (523 KB) | HTML iconHTML

    The purpose of this paper is to provide a framework to tune and evaluate the performance of the H.264 codec in 802.11b wireless ad-hoc networks. The codec's error-resilience features are measured under stress conditions typical to these networks, and the most critical parameters are presented. We present solutions concerning the random packet loss problem and show how to quickly recover from packe... View full abstract»

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  • Multiresolution for the detection of xiphoidal sounds in noisy medical audio signals

    Publication Year: 2003, Page(s):619 - 624 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (388 KB) | HTML iconHTML

    In this paper a method we have developed in order to detect particular events (xiphoidal sounds) in swallowing audio signals is presented. The difficulty of the problem comes from the noisy nature of our medical audio signals, due to biological and environmental reasons. Besides, xiphoidal sounds have a highly nonstationary behaviour that makes conventional analysis methods such as Fourier transfo... View full abstract»

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  • Use of nonlinear operations in digital systems for identification of location signals

    Publication Year: 2003, Page(s):525 - 530 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (352 KB) | HTML iconHTML

    The location systems are subject to a lot of natural and artificial disturbances. One of the main problems is the search for a solution to increase reliability and speed of this system work. We propose to use signals with linear frequency modulation connected with code manipulation. Basing on this idea, system for identification code sequences carried by wideband signals (chirp signals), has been ... View full abstract»

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  • Robust data hiding in MPEG-2 video against transcoding

    Publication Year: 2003, Page(s):695 - 700 vol.2
    Cited by:  Patents (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (447 KB) | HTML iconHTML

    Embedding watermark in compressed video is a challenging problem, and moreover transcoding the watermarked video due to bandwidth requirement makes the watermark more difficult to survive. As we know, transcoding sometimes involves numerical process as well as geometrical process, such as aspect ratio changing. In this paper, synthetical techniques including redundant embedding and scene-based emb... View full abstract»

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  • The influence of increasing the tone value on the printing reproduction quality

    Publication Year: 2003, Page(s):545 - 550 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (395 KB) | HTML iconHTML

    In graphic reproduction, because of the specific features of the process influenced by different parameters, deformities of the screen element happen influencing more or less the reproduction quality decrease at consumers during the observation of the graphic product in real conditions. This work investigates the influence of the tone values increase on the quality decrease of the printed graphic ... View full abstract»

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  • A feedback control model for resource management on streaming media servers

    Publication Year: 2003, Page(s):835 - 840 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (362 KB) | HTML iconHTML

    Utilizing system resource efficiently, and guaranteeing the client's basic QoS requirement, and supporting more requirements concurrently, is very important to streaming media applications. In this paper, we present a feedback control resource management model and resource controllers for streaming servers. Through sampling the system states periodically, and adjusting the service attributes to ch... View full abstract»

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  • Performance of the Bluetooth-based WPAN for multimedia communication

    Publication Year: 2003, Page(s):783 - 788 vol.2
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (386 KB) | HTML iconHTML

    In recent years, wireless ad hoc networks have been a growing area of research. Especially a Bluetooth-base wireless personal area network (WPAN) for multimedia communication requires more attention. The WPAN is new standard under development, as a part of the IEEE802.15 standard. This paper analyzes performance Bluetooth piconet for video transmission from theoretical and simulation point of view... View full abstract»

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  • A speech recognition algorithm based on the features of Croatian language

    Publication Year: 2003, Page(s):613 - 618 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (339 KB) | HTML iconHTML

    The paper examines an acoustic-phonetic, approach to speech recognition, with elements of artificial intelligence. The vowels of the Croatian language are assumed as examples of speaking segments. Frequency transformation has been realized passing the speech segments through the corresponding selective filter banks. It has been shown that on the outputs of this filter bank the significantly compar... View full abstract»

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  • Improved illumination independent moving object detection in real world video sequences

    Publication Year: 2003, Page(s):473 - 476 vol.2
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (257 KB) | HTML iconHTML

    A new, simple, fast and effective method for moving object detection in outdoor environment, invariant to extreme illumination changes, is presented as an improvement to the shading model method described earlier. It is based on an analytical parameter introduced in the shading model, background updating technique and window processing. View full abstract»

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  • How to produce small-sized CD-ROM multimedia applications-simple guidelines

    Publication Year: 2003, Page(s):753 - 758 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (433 KB) | HTML iconHTML

    One of the biggest difficulties associated with the production of multimedia applications is the enormous amount of space (storage capacity) occupied by this sort of applications. In this paper we demonstrate, with a practical case, how is it possible, by following some simple guidelines, to produce attractive CD-ROM multimedia applications (with text, images, graphics, sound, animation and video)... View full abstract»

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  • Ridge polynomial networks in pattern recognition

    Publication Year: 2003, Page(s):519 - 524 vol.2
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (370 KB) | HTML iconHTML

    Ridge polynomial networks (RPNs) are a special class of high order neural networks, which are computationally much more efficient than traditional high order neural networks. Motivated by the ability of high order NNs to perform shift and rotation invariant pattern recognition tasks, we apply RPNs for function approximation and character recognition. We are using features from the image block repr... View full abstract»

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  • Forward masking phenomenon in concatenative speech synthesis

    Publication Year: 2003, Page(s):691 - 694 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (329 KB) | HTML iconHTML

    The approach described in the paper tries to get more knowledge to the concatenative text-to-speech system design. The knowledge is based on masking phenomenon of the inner ear, particularly of its temporal (forward) masking properties. Designing such knowledge-based system is suggested to use in the unit selection-based speech synthesis, as contemporary a prominent technique in concatenative synt... View full abstract»

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  • Similarity hypergraph representation for impulsive noise reduction

    Publication Year: 2003, Page(s):539 - 544 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (369 KB) | HTML iconHTML

    In this paper, a new approach to the problem of impulsive noise reduction in image is presented. First, an image neighborhood hypergraph representation using a similarity measure is computed. Next, a detection procedure based on hypergraph properties is used to classify hyperedges either as noisy, or clean data. Then we apply a nonlinear filter to noisy detected pixels. The results show that the p... View full abstract»

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  • Fast recognition of multiple faces using MCM

    Publication Year: 2003, Page(s):435 - 440 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (507 KB) | HTML iconHTML

    In this paper we present the novel minimal classification method (MCM) that provides an elegant and computationally efficient approach to the problem of multiple face recognition. In the classification we use a special set of filters which yield low values of correlation with a given set of images and large values with other natural images. Such filters are called antifaces. The minimal classifica... View full abstract»

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  • Network parameter estimation for voice data transmission in virtual private networks

    Publication Year: 2003, Page(s):811 - 815 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB) | HTML iconHTML

    In this work we discuss possible use of virtual private networks (VPN) for voice data transmission. A VPN system for now is widely used for network resource access and it is desirable to understand such network usability for voice communications. For this we chose measurement system which gives network bottleneck link characteristics and based on this information we estimate queuing system paramet... View full abstract»

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  • Bilingual speech recognition of Slovenian and Croatian weather forecasts

    Publication Year: 2003, Page(s):637 - 642 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB) | HTML iconHTML

    In the paper we present some results of a joint project in speech data collection and speech recognition of Slovenian and Croatian weather forecasts. In the paper we describe the procedures we have performed in order to obtain domain specific speech databases from broadcast programmes. We further describe the speech recognition experiments for language identification and the speech recognition exp... View full abstract»

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  • CATV broadband technologies

    Publication Year: 2003, Page(s):829 - 834 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (414 KB)

    Cable television systems can be successfully used as broadband multimedia networks. Cable TV providers can offer additional services over CATV network, such as Internet access, video on demand and other applications. The article describes different techniques and technologies applied in modern two-way interactive CATV systems that enable variety of new service. View full abstract»

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  • Issues concerning usability of 802.11 networks for real-time service transport

    Publication Year: 2003, Page(s):583 - 588 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (399 KB) | HTML iconHTML

    There has been a considerable expansion of alternative, VOIP based enterprise telephony networks in recent years. These networks have introduced stable and flexible cores that can be used to accommodate traffic from diverse set of edge applications. One of the newer developments in the access part of the network is introduction of wireless Ethernet as a medium that enables mobility and flexibility... View full abstract»

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  • An improved WBT model for enhanced interoperable and reusable environment

    Publication Year: 2003, Page(s):777 - 782 vol.2
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (411 KB) | HTML iconHTML

    Nowadays, the use of multimedia content in e-learning systems is strongly increasing. However, the current authoring systems provide a proprietary media content format, which lacks compatibility between the various legacy systems. Additionally, the indexing and retrieval of these contents are not included. Therefore, several organizations have developed standard to overcome these drawbacks. This p... View full abstract»

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  • Linear predictive speech coding using fermat number transform

    Publication Year: 2003, Page(s):607 - 612 vol.2
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (412 KB) | HTML iconHTML

    This paper is about the reduction of the computational complexity of a speech codec. A linear predictive coding procedure is developed to allow its implementation with number theoretic transforms. The use of fermat number transform can reduce, in a significant way, the cost of linear predictive algorithm implantation on digital signal processor. View full abstract»

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  • Labeling of human body parts

    Publication Year: 2003, Page(s):467 - 472 vol.2
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (469 KB) | HTML iconHTML

    A novel method for human body parts labeling, given a set of body parts that are represented by bars in the image is developed. First, we assume that in addition to the head and torso, the human body has 8 major body parts namely, the upper and lower arms (left and right) and the upper and lower legs (left and right) and all these parts can be approximated by cylinders that appear as rectangular b... View full abstract»

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