Observatorio de I+D+i UPM

Memorias de investigación
Conferencias:
About subjective evaluation of adaptive video streaming
Año:2015
Áreas de investigación
  • Tecnología electrónica y de las comunicaciones
Datos
Descripción
The usage of HTTP Adaptive Streaming (HAS) technology by content providers is increasing rapidly. Having available the video content in multiple qualities, using HAS allows to adapt the quality of downloaded video to the current network conditions providing smooth video-playback. However, the time-varying video quality by itself introduces a new type of impairment. The quality adaptation can be done in different ways. In order to find the best adaptation strategy maximizing users perceptual quality it is necessary to investigate about the subjective perception of adaptation-related impairments. However, the novelties of these impairments and their comparably long time duration make most of the standardized assessment methodologies fall less suited for studying HAS degradation. Furthermore, in traditional testing methodologies, the quality of the video in audiovisual services is often evaluated separated and not in the presence of audio. Nevertheless, the requirement of jointly evaluating the audio and the video within a subjective test is a relatively under-explored research field. In this work, we address the research question of determining the appropriate assessment methodology to evaluate the sequences with time-varying quality due to the adaptation. This was done by studying the influence of different adaptation related parameters through two different subjective experiments using a methodology developed to evaluate long test sequences. In order to study the impact of audio presence on quality assessment by the test subjects, one of the experiments was done in the presence of audio stimuli. The experimental results were subsequently compared with another experiment using the standardized single stimulus Absolute Category Rating (ACR) methodology.
Internacional
Si
ISSN o ISBN
0277-786X
Entidad relacionada
IS&T/SPIE
Nacionalidad Entidad
E.E.U.U. DE AMERICA
Lugar del congreso
San Francisco, Estados Undidos
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Narciso Garcia Santos (UPM)
  • Autor: Kjell Brunnström (ACREO)
  • Autor: Samira Tavakoli . (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Grupo de Tratamiento de Imágenes (GTI)
  • Departamento: Señales, Sistemas y Radiocomunicaciones
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