arXiv subjects

Paul Auguste Rpa Randriamitantsoa

Publications and source records attributed to Paul Auguste Rpa Randriamitantsoa.

2 recordsLinked to original sources

arXiv2011

Comparison Of The Consumption Of Resources Between HTTP And SIP

Currently, the development of research around VoIP experience a tremendous growth. In the community of open source Asterisk represents a reliable alternative for a lower cost solution. In this same community as the SIP protocol is a supplement to the more asterisk PBX. to share the benefits claimed by proponents of free software co-existence with other Asterisk server is not yet proven. In this context this paper we show a comparison of the use of simplified resource material for the apache server using the HTTP protocol and server that uses the asterisk SIP.

cs.NI↗

arXiv2010

Tatouage Robuste Et Aveugle Dans Le Domaine Des Valeurs Singulieres

Digital watermarking consists on inserting a mark into an image to protect it against copies. The heaviness of the extraction procedure with the old methods urged us to look for a new algorithm in the singular values domain which would be blind : it does not require the original image to extract the mark. We propose a new robust method which consists on inserting the bits of the mark into the singular values matrix. Contrary to most of the watermarking algorithms, it is blind and the results show that our method is robust against the JPEG compression, the reduction of colors (GIF) and the histogram spreading. So, we were able to obtain PSNR = 49,63 dB.

cs.CR↗