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Most of published audio watermark algorithms are suffered a trade-off between inaudibility and detectibility, and the detection performance depends greatly on the strength of noise added by communication channels. This work introduces an audio watermarking method that can overcome this challenge, i.e. allows increasing watermark strength while preserving inaudibility. The scheme uses psychoacoustic...
How to reconstruct a high resolution and quality from low resolution images captured from a digital camera is always the top target of any image processing system. Exploit the aliasing feature of sampled images, we propose a new technique to register exactly the motions between images, including rotations and shifts, by using only frequency domain phase-shift method. Based on registered parameters,...
This paper offers performance analysis of decode-and-forward protocol employing selection combining (SC) at the destination. For an arbitrary number of relays, BER for MPSK of the system is investigated in both independent identically distributed (i.i.d) and independent but not identically distributed (i.n.d.) Rayleigh fading channels. A variety of simulations are performed and show that they match...
An approach based on the continuous wavelet transform and their local maxima for the speech processing is presented. We study on some issues of wavelet functions for instantaneous frequency extraction of speech signals. From then we conclude a suitable mother wavelet for the speech processing. The local maxima, which are located on the high-energy concentration curves in the time-scale domain of the...
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