Перегляд за автором "Tverdokhlib, V."

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  • Зображення мініатюри
    Публікація
    Constructing the Code Description Of the Transformant DCT Taking into Account their Structural Features
    (IEEE, 2020) Barannik, N.; Tverdokhlib, V.; Eliseev, E.; Zakomorna, K.; Vorontsova, N.; Shmakov, V.
    An approach to the construction of a code description of DCT transformants, taking into account the structural features of their binary representation, is presented. It is shown that the proposed model for constructing the code has the ability to reduce the initial number of bits, and also allows you to form a code description of the transformant by a set of independent code blocks. This makes it possible to use this coding method in a video bit rate control system.
  • Зображення мініатюри
    Публікація
    Integration the non-equilibrium position encoding into the compression technology of the transformed images
    (IEEE, 2021) Tverdokhlib, V.; Barannik, Vladimir; Ryabukha, Y.; Dodukh, A.; Suprun, O.; Tarasenko, D.
    The principles of integration of non-equilibrium-positional coding into the technology of compression of transformed images are considered as an alternative to probability-statistical methods of coding, which can provide high compression ratios without loss of information quality. The ways of eliminating contradictions between the need to reduce code redundancy and the requirement to determine the boundaries of codewords bearing information about the value of the code quantity are proposed.
  • Зображення мініатюри
    Публікація
    Method of coding dynamic sequence of frame-spline structures of provided frames in info-communications
    (IEEE, 2021) Tverdokhlib, V.; Barannik, V.; Barannik, N.; Babenko, Y.; Himenko, V.
    This paper explains the general technological principle in the process of coding the sequence of predicted frames and their blocks in the spectrally differentiated space for coding methods of the H26 family *. There is the application of frame processing depending on their type in the stream and weight to video resource and their integrity. Problems for the existing technologies of processing a set of positional coordinates that describe the length of insignificant components of transformants are revealed. The main stages of the creation method of coding a dynamic sequence of frame-spline structures of the provided shots in info-communications are stated.
  • Зображення мініатюри
    Публікація
    Method of Selective Steganographic Data Hiding Based on Graphic Containers
    (IEEE, 2022) Tverdokhlib, V.; Barannik, D.; Kulitsa, O.; Savchuk, M.; Chornomaz, I.; Parkhomenko, M.
    An approach to the construction of a selective algorithm for steganographic information hiding based on graphic type containers is proposed. Unlike to most of existing approaches, proposed algorithm takes into account the container fragments content features. So, in the source container, initially performs search for a transformants set suitable for modification. In the next step, within each such identified transformants, a components set that are potentially acceptable for direct modification determines. At the same time, the search parameters for both the transformants set and the components can be modified using the stego key parameters. Encapsulating the secret message bits procedure considered. In this case used an approach based on indirect encapsulation, during which the component decimal value changes. Based on the fact that the algorithm does not make changes to the container that are characteristic of most known steganographic methods, and also due to the fact that the number of encapsulated bits within the container is insignificant, the proposed approach is potentially resistant to stegoanalysis methods