Implementation and Evaluation of P.880 Methodology: Continuous Evaluation of Time Varying Speech Quality (CETVSQ) - Couverture souple

Syed Hassan Imam, Hasani

 
9783838372549: Implementation and Evaluation of P.880 Methodology: Continuous Evaluation of Time Varying Speech Quality (CETVSQ)
Couverture souple
ISBN 10 : 3838372549 ISBN 13 : 9783838372549
Editeur : LAP LAMBERT Academic Publishing, 2010

Synopsis

Continuous Evaluation of Time Varying Speech Quality (CETVSQ) is a method of subjective assessment of transmitted speech quality for long speech sequences containing quality fluctuations in time. This method is modeled for continuous evaluation of long speech sequences based on two subjective tasks. First task is to assess the speech quality during the listening and second task is to assess the overall speech quality after listening to the speech sequences. The development of CETVSQ was motivated by fact that speech quality degradations are often not constant and varies in time. In modern IP telephony and wireless networks, speech quality varies due to specific impairments such as packet loss, echo, handover in networks etc. Many other standard methods already exist, which are being used for subjective assessment of short speech sequences. These methods such as ITU-T Rec. P.800 are well suited for only time constant speech quality. It has been revealed that if long speech sequences are divided into short segments and evaluated using P.800 ACR, then P.800 ACR results will be different from the results obtained from CETVSQ methodology. The study proves the necessity of CETVSQ.

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Présentation de l'éditeur

Continuous Evaluation of Time Varying Speech Quality (CETVSQ) is a method of subjective assessment of transmitted speech quality for long speech sequences containing quality fluctuations in time. This method is modeled for continuous evaluation of long speech sequences based on two subjective tasks. First task is to assess the speech quality during the listening and second task is to assess the overall speech quality after listening to the speech sequences. The development of CETVSQ was motivated by fact that speech quality degradations are often not constant and varies in time. In modern IP telephony and wireless networks, speech quality varies due to specific impairments such as packet loss, echo, handover in networks etc. Many other standard methods already exist, which are being used for subjective assessment of short speech sequences. These methods such as ITU-T Rec. P.800 are well suited for only time constant speech quality. It has been revealed that if long speech sequences are divided into short segments and evaluated using P.800 ACR, then P.800 ACR results will be different from the results obtained from CETVSQ methodology. The study proves the necessity of CETVSQ.

Biographie de l'auteur

Master of Computer Science from University of Kalmar, Sweden. Master of Electrical Engineering with emphasis on telecommunication system from Blekinge Institute of Technology, Sweden. Worked as research engineer at Ericsson AB, Sweden.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2010
Langue
anglais
ISBN 10 
3838372549
ISBN 13 
9783838372549
Reliure
Broché
Nombre de pages
192
Coordonnées du fabricant
non disponible
Personne responsable
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