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World Scientific Pub Co Pte Ltd
DNN-based speech watermarking resistant to desynchronization attacks
Desynchronization attacks proved to be the greatest challenge to audio watermarking systems as they introduce misalignment between the signal carrier and the watermark. This paper proposes a DNN-based speech watermarking system with two adversarial networks jointly trained on a set of desynchronization attacks to embed a randomly generated watermark. The detector neural network is expanded with spatial pyramid pooling layers to be able to handle signals affected by these attacks. A detailed training...
Preuzmite dokument 2023 Kosta Pavlović , Slavko Kovačević , Igor Djurovic , Adam Wojciechowski
Walter de Gruyter GmbH
Estimation of parameters of a sum of sinusoids sampled below the Nyquist rate with frequencies away from the grid
Abstract We are witnessing a growing interest in processing signals sampled below the Nyquist rate. The main limitation of current approaches considering estimation of multicomponent sinusoids parameters is the assumption of frequencies on the frequency grid. The sinusoids away from the frequency grid are considered in this paper. The proposed procedure has three stages. In the first two, a rough estimation of signal components is performed while in the third refinement in estimation...
Preuzmite dokument 2021 Igor Djurovic
Walter de Gruyter GmbH
Estimating DOA and PPS parameters of signal received by ULA in heavy noise environment
Abstract Estimation of the direction-of-arrival (DOA) and parameters of polynomial phase signal (PPS) impinging on the uniform linear array (ULA) of sensors in heavy-tailed noise environments is considered in this paper. To estimate signal parameters, a recently proposed quasi maximum-likelihood (QML) estimator is adopted. The proposed algorithm consists of two successive steps: (1) noise influence mitigation by using the proposed normalization strategy and (2) signal parameters estimation...
Preuzmite dokument 2020 Vladimir V. Lukin , Marko Simeunović , Igor Djurovic
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