Utilizing compound sequences produced by continuous Chua circuit and discrete standard map,disordering sound signal stream and transmitting them in channel,this scheme can encrypt sound file rapidly and recover cipher accurately.

Method of solving LPC coefficients of speech signals;

the Character Analysis of Speech Signal with Time and Frequency Based on MATLAB;

Method to determine delay time of speech signal in reconstructed phase space;

Blind source separation of speech signals based on the amplitude correlation of neighbour bins;

The Study of Blind Source Separation of Speech Signals;

Based on the analysis of average displacement (AD) method for selection of time delay in phase space reconstruction of speech signals, this paper modifies the original measurement of AD method to get a better criterion for proper time delay selection, which has a sound theoretic basis and can produce better effect.

The design of the voice signal real time noise cancellation software;

This paper elaborates on the basic principle of linear preduction inanalysing voice signal technology and solves the effective calculation method about thecoupled equations of linear preduction by using self-interrelative theory.

A DSP control based voice systems, with TMS320VC5402bas a microcontroller, realizes the functions of voice signal acquisition compression and data transmission.

Visual design of audio signal acquisition and analysis system based on the MATLAB;

Realization of Transfer of Audio Signal Based on Java on Internet;

The paper discusses the principle and process of DTMF decoding based on Goertzel algorithm,and simply introduces the composition of a section of audio signal,then simulates the decoding of Goertzel algorithm in audio environment.

The contradiction of spectral resolution and permutation alignment will appear in speech blind signal separation(BSS) of frequency domain when using independent component analysis(ICA).