There are many different ways to subdivide the spectrum of a bounded linear operator; some of them are motivated by applications to physics (in particular, quantum mechanics). In a series of papers, B.E. Rhoades and M. Yildirim previously investigated the spectra and fine spectra for factorable matrices, considered as bounded operators over various sequence spaces. In the present paper, approxi...

Abstract In this paper, we propose to embed the watermark information in the log-2-spatio domain by means of spread spectrum technique. In log-2-spatio domain, the variance of the information is reduced significantly. This improves the efficiency and robustness of spread spectrum technique. Low intensity and mid-band regions are selected to embed the information in order to guarantee an invisib...

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This paper presents some arguments in favour of further research in video compression because of scarce spectrum resources for mobile applications and the lack of powerful tools for scalable coding. Finally some ideas and results for metadata based compression, improved prediction and scalable schemes are presented.

10  Abstract—A good amount of work has been done in the field of compression, voice signal detection, and spectrum analysis which has been generated a number of results in the past few decades. In this research, following three important problems have been identified: 1. To distinguish between constitutional and unconstitutional Voice: It is an important task to identify authenticity of record...

This paper presents the application of spectral analysis methods that are based on the FFT algorithm to the study of the surface EMG power spectrum compression. Some preferred characteristic frequencies used to monitor the spectral compression are the mean and median frequencies. In this work, we show that the spectral density estimation by the Blackman-Tukey method associated with the weightin...

We approach the theoretical problem of compressing a signal dominated by gaussian noise. We present accurate expressions for the compression ratio which can be reached under the light of Shannon’s noiseless coding theorem, for a linearly quantized stochastic gaussian signal (noise). The compression ratio decreases logarithmically with the amplitude of the frequency spectrum of the noise P (f). ...

This paper presents the improvement of watermarking images by the joint use of the technique of spread spectrum (robustness) and a psycho visual mask pattern (imperceptibility) in the JPEG 2000 compression. Previous work had shown the benefit of using the technique of spread spectrum in the safety of the JPEG 2000 compression. After the wavelet decomposition of the image, the brand is inserted ...