Shevchuk R. Multichannel computer facilities of converting formats and cryptographic defence of compression speech signals

The work for competition for a candidate degree of technical sciences by specialty 05.13.05 - Computer systems and components. it is the Ternopil National Economical University, Ternopil, 2008. The dissertation work is devoted of improvement of multichannel computer facilities of converting formats and cryptographic defence of compression speech signals. The developed methods of converting compression of speech signal between formats GSM 06.20, G.729A, G.723.1, which enable to conduct the direct converting of parameters from one format into other. The developed method of multi-stage mixing speech signals on the basis of memory with arbitrary access, that to avoid turns in the mixer buffer and shorted processing delay. The improved structures operating device cryptographic modules of the processors IPSec for different services of data processing at different technological descriptions of component base, that provided reduce complexity. Keywords: multichannel computer facilities, converting formats, mixing, transcoding, speech signals, structure of operating device, IPSec.