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Comparison of voice and audio codecs
Lúdik, Michal ; Sysel, Petr (oponent) ; Míča, Ivan (vedoucí práce)
This thesis deals with description of human hearing, audio and speech codecs, description of objective measure of quality and practical comparison of codecs. Chapter about audio codecs consists of description of lossless codec FLAC and lossy codecs MP3 and Ogg Vorbis. In chapter about speech codecs is description of linear predictive coding and G.729 and OPUS codecs. Evaluation of quality consists of description of segmental signal-to- noise ratio and perceptual evaluation of quality – WSS and PESQ. Last chapter deals with description od practical part of this thesis, that is comparison of memory and time consumption of audio codecs and perceptual evaluation of speech codecs quality.
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Cryptographic protocols used in computer networks
Lúdik, Michal ; Hajný, Jan (oponent) ; Doležel, Radek (vedoucí práce)
This work deals with the analysis of basic cryptographic protocols, principle of the authentication and verification of their safety. In the first part of the work is a short introduction to the issue - cryptography, some types of attacks, authentication and authorisation. In the second part is the analysis of protocols SSH, SSL, IPSec, and Kerberos, authentication and verification of their functionality and security under laboratory conditions.
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Cryptographic protocols used in computer networks
Lúdik, Michal ; Hajný, Jan (oponent) ; Doležel, Radek (vedoucí práce)
This work deals with the analysis of basic cryptographic protocols, principle of the authentication and verification of their safety. In the first part of the work is a short introduction to the issue - cryptography, some types of attacks, authentication and authorisation. In the second part is the analysis of protocols SSH, SSL, IPSec, and Kerberos, authentication and verification of their functionality and security under laboratory conditions.
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Comparison of voice and audio codecs
Lúdik, Michal ; Sysel, Petr (oponent) ; Míča, Ivan (vedoucí práce)
This thesis deals with description of human hearing, audio and speech codecs, description of objective measure of quality and practical comparison of codecs. Chapter about audio codecs consists of description of lossless codec FLAC and lossy codecs MP3 and Ogg Vorbis. In chapter about speech codecs is description of linear predictive coding and G.729 and OPUS codecs. Evaluation of quality consists of description of segmental signal-to- noise ratio and perceptual evaluation of quality – WSS and PESQ. Last chapter deals with description od practical part of this thesis, that is comparison of memory and time consumption of audio codecs and perceptual evaluation of speech codecs quality.
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