На проходящей сейчас в Харькове в помещении ХНУРЭ международной IEEE конференции PICST-2015 (учитывается в базе SCOPUS) выступили с пятью научными докладами преподаватели и аспиранты нашей кафедры. В конференции приняли участие: А. Акулиничев, А. Воробьев, А. Зеленский, М. Зряхов, Н. Кожемякина, А. Кравчук, С. Кривенко, В. Лукин, А. Науменко, В. Науменко, Н. Пономаренко, А. Проскочило, А. Рубель, В. Солодовник, А. Тоцкий. Ниже приведен список названий докладов и краткая аннотация по каждому. Рабочий язык конференции - английский, конференция является ежегодной и проводится в октябре (первый раз была проведена в 2014 г.).
A. Proskochylo, A. Vorobyov, M. Zriakhov, A. Kravchuk, A. Akulynichev, V. Lukin, Overview of Wireless Technologies for Organizing Sensor Networks / Proceedings of Second International Scientific-Practical Conference Problems of Infocommunications. Science and Technology, Kharkov, Ukraine, Oct. 13-15, 2015, pp. 39-41. Abstract — The paper deals with review of the main technologies of wireless access that are used in modern wireless sensor networks (WSN). Comparative analysis of access technologies for the most important parameters is provided. Main advantages and disadvantages for applying these technologies in WSN are reviewed.
N. Kozhemiakina, V. Lukin, N. Ponomarenko, A. Akulynichev, J. Astola , K. Egiazarian, Method of Data Compression for Traffic Monitoring / Proceedings of Second International Scientific-Practical Conference Problems of Infocommunications. Science and Technology, Kharkov, Ukraine, Oct. 13-15, 2015, pp. 153-156. Abstract— In this paper a problem of compressing data containing information on basic parameters of network traffic is considered. Six test sets with different types of network traffic for known monitoring tool Wireshark are formed. Analysis of compression efficiency for these datasets by widely used archivers is carried out. It is shown that the main part of memory in compressed data relates to timestamps. A method for compressing timestamps that consists in delta calculation, Burrows-Wheeler transform (BWT), distance coding (DC) and recursive group coding (RGC) at the final stage is proposed. It is demonstrated that the use of RGC at the final stage provides more efficient coding compared to known methods. It is also shown that the proposed method of timestamps coding produces about twice larger compression ratio than WinRar.
O. Rubel, N. Ponomarenko, V. Lukin, J. Astola, K. Egiazarian, HVS-based Local Analysis of Denoising Efficiency for DCT-based Filters / Proceedings of Second International Scientific-Practical Conference Problems of Infocommunications. Science and Technology, Kharkov, Ukraine, Oct. 13-15, 2015, pp. 189-192. Abstract— Images acquired and processed in communication and multimedia systems are often noisy. Thus, pre-filtering is a typical stage to remove noise. At this stage, a special attention has to be paid to image visual quality. This paper analyzes denoising efficiency from the viewpoint of visual quality improvement using metrics that take into account human vision system (HVS). Specific features of the paper consist in, first, considering filters based on discrete cosine transform (DCT) and, second, analyzing the filter performance locally. Such an analysis is possible due to the structure and peculiarities of the metric PSNR-HVS-M. It is shown that a more advanced DCT-based filter BM3D outperforms a simpler (and faster) conventional DCT-based filter in locally active regions, i.e., neighborhoods of edges and small-sized objects. This conclusions allows accelerating BM3D filter and can be used in further improvement of the analyzed denoising techniques.
V. Naumenko, V. Solodovnik, A. Totsky, A. Zelensky, J. Astola, Bispectrum-Based Demodulation Technique Using Triple-Channel Heterodyning of Triplet-Signal / Proceedings of Second International Scientific-Practical Conference Problems of Infocommunications. Science and Technology, Kharkov, Ukraine, Oct. 13-15, 2015, pp. 224-226. Abstract—Paper is dedicated to novel bispectrum-based demodulation technique by using triple-channel heterodyning of triplet-signals. Test statistics used for triplet-signals detection and discrimination are evaluated in the form of the bimagnitude peak values. Experimental study of noise immunity in bispectrum-based digital communication system is performed for suggested triple-channel heterodyning technique. Bit error rate (BER) values are computed under additive Gaussian noise influence in radio communication link for wide variations of input signal-to-noise ratio (SNR).
A. Naumenko, S. Krivenko, N. Ponomarenko, A. Zelensky, V. Lukin, Texture Detection in Noisy Images by Combining Several Local Parameters / Proceedings of Second International Scientific-Practical Conference Problems of Infocommunications. Science and Technology, Kharkov, Ukraine, Oct. 13-15, 2015, pp. 230-233. Abstract— A problem of detecting textural areas in images corrupted by noise is considered. Detection is based on joint use of several local parameters calculated in scanning windows (blocks) of different size. Trained support vector machine (SVM) classifier is used for combining local parameters. Factors that influence detector performance are analyzed. It is shown that detector performance can be improved by taking into account information from classifier output for neighbor pixels.