An endpoint detection algorithm that combines expanded spectral subtraction with the SAP (speech absence probability) dynamic threshold is proposed based on traditional methods.

Implementing a Speech Enhancement System with ESS on DSP;

In order to improve basic spectral substraction,based on the characteristic of leak water signal,the overlap frame is joined to reduce the influence of music noise,and the spectral substraction and wiener filter consisting of extended spectral substraction are used to suit the leak water signal which does not have silence frame.

Suppression of multiples by improved expanding multi-channel match minus method.

At present, spread spectrum technology has been extensively applied in the field of tactical anti-jamming communication.

Contributed to the acquisition and Code tracing for the DS spread spectrum com munication systems, this paper presents the scheme of sliding search self-synchronization for a DS system.

In this paper,the theory of spread spectrum communication technology is presented,the structure and the operating principle of spread spectrum communication system are discussed.