| Texto completo | |
| Autor(es): |
Rodriguez, Demostenes Z.
[1]
;
Abrahao, Julia
[1]
;
Begazo, Dante C.
[1]
;
Rosa, Renata L.
[1]
;
Bressan, Graca
[1]
Número total de Autores: 5
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Dept Comp Engn, Sch Engn, BR-05508 Sao Paulo - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | IEEE TRANSACTIONS ON CONSUMER ELECTRONICS; v. 58, n. 3, p. 985-992, AUG 2012. |
| Citações Web of Science: | 30 |
| Resumo | |
There is a wide range of video services over complex transmission networks, and in some cases end users fail to receive an acceptable quality level. In this paper, the different factors that degrade users' quality of experience (QoE) in video streaming service that use TCP as transmission protocol are studied. In this specific service, impairment factors are: number of pauses, their duration and temporal location. In order to measure the effect that each temporal segment has in the overall video quality, subjective tests. Because current subjective test methodologies are not adequate to assess video streaming over TCP, some recommendations are provided here. At the application layer, a customized player is used to evaluate the behavior of player buffer, and consequently, the end user QoE. Video subjective test results demonstrate that there is a close correlation between application parameters and subjective scores. Based on this fact, a new metrics named VsQM is defined, which considers the importance of temporal location of pauses to assess the user QoE of video streaming service. A useful application scenario is also presented, in which the metrics proposed herein is used to improve video services(1). (AU) | |
| Processo FAPESP: | 11/12724-8 - Definição de índice de qualidade para avaliação de QoE no serviço de streaming de vídeo |
| Beneficiário: | Demostenes Zegarra Rodriguez |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |