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检索条件"机构=PhysTech-School of Radio Engineering and Computer Technologies"

共 69 条记录，以下是1-10 订阅

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Enhancing Versatile Video Coding Efficiency via Post-Processing of Decoded Frames Using Residual Network Integration in Deep Convolutional Neural Networks

Enhancing Versatile Video Coding Efficiency via Post-Process...

引用

Digital Signal Processing and its Applications (DSPA), International Conference on

作者： Murooj Khalid Ibraheem Ibraheem Alexander V. Dvorkovich Department of Multimedia Technologies and Telecommunications Phystech-School of Radio Engineering and Computer Technologies (FRKT) Moscow Institute of Physics and Technology (MIPT) Dolgoprudny Russia

The VVC standard, also known as Versatile Video Coding represents an advancement, in video compression technology. Its main objective is to improve compression efficiency while upholding high image quality standards. One of the standout features of VVC is its capacity to enhance performance in applications by reducing data requirements without compromising the contents integrity. This study presents a technique for enhancing video quality post compression by integrating a Residual Deep Convolutional Neural Network (Res DCNN) into the VVC framework. By combining the ResNet architecture with Deep Convolutional Neural Networks (DCNNs) the research aims to improve the clarity of video frames. The Res DCNN framework, comprising layers and Residual Dense Blocks (RDBs) effectively extracts features from video data. By using VVC Test Model 22.2 for encoding and decoding processes and TensorFlow for model training this study demonstrates improvements in video quality. The results indicate an enhancement in image quality with the PSNR value increasing from 35.36 dB to 37.33 dB highlighting the effectiveness of the Res DCNN approach. The seamless integration of Res DCNN into video compression technology marks a step forward in achieving visual quality while optimizing data usage, for video processing purposes.

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Analysis of the Efficiency of Radar Target Classification by Heinen Polarization Parameters in the Monostatic Configuration

Analysis of the Efficiency of Radar Target Classification by...

引用

2021 International Conference engineering and Telecommunication, En and T 2021

作者： Kopylov, Artyom A. Zimin, Igor V. Phystech School of Radio Engineering and Computer Technology Dolgoprudny Russia

ISBN: (纸本)9781728183909

A mathematical model of the radar target classification based on Heinen polarization parameters was developed. Simulations of the functioning process was carried out to analyze the effectiveness of the developed model. Based on these simulation results, an analysis of the effectiveness of this group of polarization parameters for the radar target classification problem was carried out. The article presents some results of the simulation. © 2021 IEEE.

关键词： Polarization

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Modelling a one-dimensional cross-range ISAR profile of a radar object

Modelling a one-dimensional cross-range ISAR profile of a ra...

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2021 Radiation and Scattering of Electromagnetic Waves, RSEMW 2021

作者： Parinov, Evgenii G. Zimin, Igor V. Phystech School of Radio Engineering and Computer Technology Moscow Institute of Physics and Technology Moscow Russia

ISBN: (纸本)9781665425445

In this paper the modeling of a one-dimensional (1D) cross-range inverse synthetic aperture radar (ISAR) profile of a radar object is considered. The object moves in a circular orbit. It is assumed that the object has an elongated shape. Formulas for modeling 1D ISAR profile of the radar object are given. The case of discrete observation angles is considered. © 2021 IEEE.

关键词： Radar imaging

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The Fast CU Splitting Method Based on CU Size, Quantization Parameters and Difference of Variances

The Fast CU Splitting Method Based on CU Size, Quantization ...

引用

2021 International Conference engineering and Telecommunication, En and T 2021

作者： Sergeev, Vsevolod M. Dvorkovich, Alexander V. Phystech School of Radio Engineering and Computer Technology Moscow Institute of Physics and Technology Dolgoprudnyy Russia

ISBN: (纸本)9781728183909

HEVC is one of the most efficient video-coding standards used in different kinds of services. In current HEVC model there is a large number of methods for encoding: different modes and various kinds of frame structures. In a default algorithm the full search of different encoding combinations to find the most efficient one is realized. It leads to high encoding complexity of the standard implementation. To reduce the complexity of encoding algorithm the method for fast CU (Coding Unit) decision is offered in this paper. It is based on picture structure, quantization parameter and size of CTB (Coding Tree Block). The experimental results showed that this method gives about 43% of time reduction with about 1% of coding efficiency loss. © 2021 IEEE.

关键词： Signal encoding

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About the Influence of the Brightness and Contrast Transform Accuracy on the Image Quality in Fractal Compression 23

About the Influence of the Brightness and Contrast Transform...

引用

23rd International Conference on Digital Signal Processing and its Applications, DSPA 2021

作者： Diep, Do Ngok Dvorkovich, Alexander V. Moscow Institute of Physics and Technology National Research University Phystech-School of Radio Engineering and Computer Science Moscow Russia

ISBN: (纸本)9781728195513

Brightness and contrast transform of domains is an essential part of fractal image compression algorithm. Traditionally well-known fixed number of bits are used for storing of brightness and contrast transform coefficients chosen from fixed ranges. At the same time, these ranges and accuracy of transform coefficients severely affects the distortions of the reconstructed image. In this paper, we investigate the influence of the ranges and the storing accuracy of the brightness and contrast transform coefficients for domains on the quality of the reconstructed image in fractal image compression. The research has been shown that appropriate adjusting of the coefficients ranges before significant decrease of the number of bits for its storing allow to achieve rather small degradation in reconstructed image (PSNR loss ∼ 0.1 - 0.3 dB). © 2021 IEEE.

关键词： Image reconstruction

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Synthesis of planar bifocal two mirror, lens and mirror-lens beamforming systems

Synthesis of planar bifocal two mirror, lens and mirror-lens...

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2021 Radiation and Scattering of Electromagnetic Waves, RSEMW 2021

作者： Kaloshin, Vadim A. Nam, Vi Ut Electromagnetism Laboratory Kotelnikov Isntitue of Radio Engineering and Electronics of RAS Moscow Russia Phystech School of Radio Engineering and Computer Technology Moscow Institute of Physics and Technology Moscow Russia

ISBN: (纸本)9781665425445

New technique for the synthesis of planar bifocal two-mirror, as well as lens and mirror-lens beamforming systems for multi-beam antennas has been developed. The technique is based on setting one initial segment of the cylindrical surface of a lens or mirror, followed by finding the remaining segments. This initial segment is given in the form of a parabolic cylinder, and the initial segment of the second mirror or second surface of the lens is found from the fine focusing condition for the center position of the beam. Further, the technique of sequentially finding new segments of the bifocal system from the condition of accurate focusing is used when the source is located in two focuses symmetrically located relative to the axis of the system. This ensures the continuity of the functions describing the shape of the surfaces of the system at the junctions of the segments, as well as their first two derivatives. It is shown that the new technique can significantly reduce the value of the root-mean-square phase aberration © 2021 IEEE.

关键词： Beamforming

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Semi-Markov Telecommunication Networks Model

Semi-Markov Telecommunication Networks Model

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2024 International Conference on Actual Problems of Electron Devices engineering, APEDE 2024

作者： Svetlov, Mikhail S. L’vov, Alexey A. Martirosyan, Arman M. Martirosyan, David M. Bagaev, Igor S. Khasanov, Semen T. Laboratory of Control and Automation Problems in Mechanical Engineering Institute of Precision Mechanics and Control of RAS Saratov Russia Institute of Institute of Electronic Engineering and Instrumentation Yuri Gagarin State Technical University of Saratov Saratov Russia Institute of Applied Information Technologies and Communications Yuri Gagarin State Technical University of Saratov Saratov Russia Phystech-School of Applied Mathematics and Computer Science Moscow Institute of Physics and Technology Moscow Russia

ISBN: (纸本)9798350393316

This paper proposes a semi-Markov model of telecommunication network (TCN). The variant of dynamic traffic adaptive control of queuing system as a special case of TCN is considered. The main purpose of control is to minimize the average cost per unit of time to service the incoming flow of information (packets). This takes into account the different bandwidth of the channels, the processing speed of information in the channel and the information capacity of the buffers. The approach to the organization of dynamic control taking into account noise immunity (information reliability) and information security is discussed. © 2024 IEEE.

关键词： Bandwidth

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The influence of the material and geometrical shape of a semiconductor nanoparticle on the sensitivity of an optical plasmon sensor

The influence of the material and geometrical shape of a sem...

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2020 International Conference engineering and Telecommunication, En and T 2020

作者： Astapenko, Valery A. Sakhno, Sergey V. Yakovets, Andrey V. Khramov, Egor S. Sakhno, Evgeniya V. PhysTech-School of Radio Engineering and Computer Technologies Moscow Institute of Physics and Technology National Research University Moscow Russia

ISBN: (纸本)9781728188294

In the work, the comparison of sensitivities of optical plasmon sensors constructed on the basis of semiconductor nanoparticles of various shapes is presented. The calculation was made within the framework of the dipole approximation. A characteristic of sensitivity is the value of the shift of the plasmon resonance maximum per unit change in the refractive index of a medium. The influence of the material of a nanoparticle and its shape on the sensitivity of an optical plasmon sensor is shown. © 2020 IEEE.

关键词： Nanoparticles

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Security of the Cryptosystem GPT Based on Rank Codes and Term-rank Codes

Security of the Cryptosystem GPT Based on Rank Codes and Ter...

引用

2021 International Conference engineering and Telecommunication, En and T 2021

作者： Nguyen, Du Hoan Pham, Huu Loc Le Thi Trang, Linh Phystech School of Radio Engineering and Computer Science Moscow Institute of Physics and Technology Moscow Russia Electric Power University Information Technology Faculty Hanoi Viet Nam

ISBN: (纸本)9781728183909

This paper investigates public key cryptosystems (PKC) in the rank metric and term-rank metric. For security analysis of cryptosystems, we introduce a GPT system. Recently, respective structural attacks this system were proposed by Over-beck. For GPT system, Overbeck's attack succeeds in polynomial time. We will discuss the new construction of Shiki system. This paper describes Overbeck's attack to the new Shiki system. Also, investigation of the possibility of using term-rank codes in public key cryptosystems. © 2021 IEEE.

关键词： Polynomial approximation

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Algorithm to compute term rank of a matrix based on the construction a bipartite graph

Algorithm to compute term rank of a matrix based on the cons...

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2020 International Conference engineering and Telecommunication, En and T 2020

作者： Pham, Huu Loc Phystech School of Radio Engineering and Computer Science Moscow Institute of Physics and Technology Moscow Russia

ISBN: (纸本)9781728188294

We consider method to compute term rank of a matrix based on the construction a bipartite graph. The term rank of a matrix $A$ is defined to be the minimum number of rows and columns that contain all non-zero elements of the matrix. In this article, we will discuss the Ford-Fulkerson algorithm for the maximum flow problem. Next, we propose modeling the algorithm in the MATLAB environment. The application of this algorithm for evaluating the characteristics of codes in a term-rank metric is considered. © 2020 IEEE.

关键词： Graph theory

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