2 citations · 5 across the 5 of their papers we have counts for
9 papers
Achievable Secrecy Rate for the Relay Eavesdropper Channel with Non-Causal State Available at Transmitter and Relay
Nematollah Zarmehi
In this paper, we consider a more general four-terminal memoryless relay-eavesdropper channel with state information (REC-SI) and derive an achievable perfect secrecy rate for it.…
A Fast Iterative Method for Removing Impulsive Noise from Sparse Signals
Sahar Sadrizadeh, Nematollah Zarmehi, Ehsan Asadi +2
In this paper, we propose a new method to reconstruct a signal corrupted by noise where both signal and noise are sparse but in different domains. The problem investigated in this…
Robust Video Watermarking against H.264 and H.265 Compression Attacks
Nematollah Zarmehi, Mohammad Javad Barikbin
This paper proposes a robust watermarking method for uncompressed video data against H.264/AVC and H.265/HEVC compression standards. We embed the watermark data in the mid-range tr…
Bounds on Discrete Fourier Transform of Random Mask
Nematollah Zarmehi, Farokh Marvasti
This paper proposes some bounds on the maximum of magnitude of a random mask in Fourier domain. The random mask is used in random sampling scheme. Having a bound on the maximum val…
Comparison of Uniform and Random Sampling for Speech and Music Signals
Nematollah Zarmehi, Sina Shahsavari, Farokh Marvasti
In this paper, we will provide a comparison between uniform and random sampling for speech and music signals. There are various sampling and recovery methods for audio signals. Her…
Optimum Decoder for Multiplicative Spread Spectrum Image Watermarking with Laplacian Modeling
Nematollah Zarmehi, Mohammad Reza Aref
This paper investigates the multiplicative spread spectrum watermarking method for the image. The information bit is spreaded into middle-frequency Discrete Cosine Transform (DCT)…
Adaptive Singular Value Thresholding
Nematollah Zarmehi, Farokh Marvasti
In this paper, we propose an Adaptive Singular Value Thresholding (ASVT) for low rank recovery under affine constraints. Unlike previous iterative methods that the threshold level…
Recovery of Sparse and Low Rank Components of Matrices Using Iterative Method with Adaptive Thresholding
Nematollah Zarmehi, Farokh Marvasti
In this letter, we propose an algorithm for recovery of sparse and low rank components of matrices using an iterative method with adaptive thresholding. In each iteration, the low…
Optimum Decoder for an Additive Video Watermarking with Laplacian Noise in H.264
Nematollah Zarmehi, Morteza Banagar, Mohammad Ali Akhaee
In this paper, we investigate an additive video watermarking method in H.264 standard in presence of the Laplacian noise. In some applications, due to the loss of some pixels or a…