This paper presents and discusses the application of blind source separation to astrophysical data obtained with the WMAP satellite.

Article history: Available online 15 May 2012

To signal processing precision of parametric sound source, the theoretical formula is derived in this paper used to calculate self-demodulated signal when dual-frequency signals taken as input of parametric sound source. And some experiments are done to verify the derived formula. This paper analyzes mainly the influences of amplitude changes of input signal frequency components on sound pressu...

Processing marine-mammal signals for species classi cation and monitoring of endangered marine mammals are problems that have recently attracted attention in the scienti c literature. For classi cation it has been proposed to use methods appropriate for non-stationary signals, such as time-frequency and time-scale analysis. This paper shows that a factor that can signi cantly a ect results from...

SUMMARY This paper presents a voice conversion (VC) technique for noisy environments, where parallel exemplars are introduced to encode the source speech signal and synthesize the target speech signal. The parallel exemplars (dictionary) consist of the source exemplars and target exem-plars, having the same texts uttered by the source and target speakers. The input source signal is decomposed i...

Signal synthesis using time-frequency distributions can be improved using an antenna array receiver. The availability of the source signals at di erent array elements allows the implementation of time-frequency synthesis techniques that utilize the source spatial signatures for crossterm reduction and noise mitigation. In this paper, we introduce a new technique for signal synthesis based on ar...

We present a system for under-determined source separation of non-stationary audio signals from a stereo 2-channel linear instantaneous mixture. This system is dedicated to isolate the different instruments/voices of a piece of music, so that an end-user can separately manipulate those source signals. The problem is addressed with a specific informed approach, that is implemented with a coder c...

This paper investigates the importance of spectrotemporal characteristics of the source excitation signal for speaker recognition. We propose an effective feature extraction technique for obtaining essential timefrequency information from the linear prediction (LP) residual signal, which are closely related to the glottal excitation of individual speaker. With pitch synchronous analysis, wavele...

An example of arithmetic coding : The source symbols are a, b, c with p(a) = 0.011, p(b) = 0.011, p(c) = 0. Wavelet coefficients of test images. Subbands are independently scaled. Most energy is concentrated in the low frequency (upper-left) subbands and a few coefficients in other subbands (in the locations of edges).. 2.6 (a)-A factor graph for a [6, 3, 3] binary code C. Function nodes are dr...