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Subjective quality assessment of longer duration video sequences delivered over HTTP adaptive streaming to tablet devices

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Abstract
HTTP adaptive streaming facilitates video streaming to mobile devices connected through heterogeneous networks without the need for a dedicated streaming infrastructure. By splitting different encoded versions of the same video into small segments, clients can continuously decide which segments to download based on available network resources and device characteristics. These encoded versions can, for example, differ in terms of bitrate and spatial or temporal resolution. However, as a result of dynamically selecting video segments, perceived video quality can fluctuate during playback which will impact end-users' quality of experience. Subjective studies have already been conducted to assess the influence of video delivery using HTTP Adaptive Streaming to mobile devices. Nevertheless, existing studies are limited to the evaluation of short video sequences in controlled environments. Research has already shown that video duration and assessment environment influence quality perception. Therefore, in this article, we go beyond the traditional ways for subjective quality evaluation by conducting novel experiments on tablet devices in more ecologically valid testing environments using longer duration video sequences. As such, we want to mimic realistic viewing behavior as much as possible. Our results show that both video content and the range of quality switches significantly influence end-users' rating behavior. In general, quality level switches are only perceived in high motion sequences or in case switching occurs between high and low quality video segments. Moreover, we also found that video stallings should be avoided during playback at all times.
Keywords
Quality of experience (QoE), IBCN, subjective video quality assessment, HTTP adaptive streaming, mobile video, tablet devices, INTERRUPTIONS, EXPERIENCE, IMPACT, QOE

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Citation

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MLA
Staelens, Nicolas, et al. “Subjective Quality Assessment of Longer Duration Video Sequences Delivered over HTTP Adaptive Streaming to Tablet Devices.” IEEE TRANSACTIONS ON BROADCASTING, vol. 60, no. 4, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS, 2014, pp. 707–14.
APA
Staelens, N., De Meulenaere, J., Claeys, M., Van Wallendael, G., Van den Broeck, W., De Cock, J., … De Turck, F. (2014). Subjective quality assessment of longer duration video sequences delivered over HTTP adaptive streaming to tablet devices. IEEE TRANSACTIONS ON BROADCASTING, 60(4), 707–714.
Chicago author-date
Staelens, Nicolas, Jonas De Meulenaere, Maxim Claeys, Glenn Van Wallendael, Wendy Van den Broeck, Jan De Cock, Rik Van de Walle, Piet Demeester, and Filip De Turck. 2014. “Subjective Quality Assessment of Longer Duration Video Sequences Delivered over HTTP Adaptive Streaming to Tablet Devices.” IEEE TRANSACTIONS ON BROADCASTING 60 (4): 707–14.
Chicago author-date (all authors)
Staelens, Nicolas, Jonas De Meulenaere, Maxim Claeys, Glenn Van Wallendael, Wendy Van den Broeck, Jan De Cock, Rik Van de Walle, Piet Demeester, and Filip De Turck. 2014. “Subjective Quality Assessment of Longer Duration Video Sequences Delivered over HTTP Adaptive Streaming to Tablet Devices.” IEEE TRANSACTIONS ON BROADCASTING 60 (4): 707–714.
Vancouver
1.
Staelens N, De Meulenaere J, Claeys M, Van Wallendael G, Van den Broeck W, De Cock J, et al. Subjective quality assessment of longer duration video sequences delivered over HTTP adaptive streaming to tablet devices. IEEE TRANSACTIONS ON BROADCASTING. 2014;60(4):707–14.
IEEE
[1]
N. Staelens et al., “Subjective quality assessment of longer duration video sequences delivered over HTTP adaptive streaming to tablet devices,” IEEE TRANSACTIONS ON BROADCASTING, vol. 60, no. 4, pp. 707–714, 2014.
@article{5950988,
  abstract     = {HTTP adaptive streaming facilitates video streaming to mobile devices connected through heterogeneous networks without the need for a dedicated streaming infrastructure. By splitting different encoded versions of the same video into small segments, clients can continuously decide which segments to download based on available network resources and device characteristics. These encoded versions can, for example, differ in terms of bitrate and spatial or temporal resolution. However, as a result of dynamically selecting video segments, perceived video quality can fluctuate during playback which will impact end-users' quality of experience. Subjective studies have already been conducted to assess the influence of video delivery using HTTP Adaptive Streaming to mobile devices. Nevertheless, existing studies are limited to the evaluation of short video sequences in controlled environments. Research has already shown that video duration and assessment environment influence quality perception. Therefore, in this article, we go beyond the traditional ways for subjective quality evaluation by conducting novel experiments on tablet devices in more ecologically valid testing environments using longer duration video sequences. As such, we want to mimic realistic viewing behavior as much as possible. Our results show that both video content and the range of quality switches significantly influence end-users' rating behavior. In general, quality level switches are only perceived in high motion sequences or in case switching occurs between high and low quality video segments. Moreover, we also found that video stallings should be avoided during playback at all times.},
  author       = {Staelens, Nicolas and De Meulenaere, Jonas and Claeys, Maxim and Van Wallendael, Glenn and Van den Broeck, Wendy and De Cock, Jan and Van de Walle, Rik and Demeester, Piet and De Turck, Filip},
  issn         = {0018-9316},
  journal      = {IEEE TRANSACTIONS ON BROADCASTING},
  keywords     = {Quality of experience (QoE),IBCN,subjective video quality assessment,HTTP adaptive streaming,mobile video,tablet devices,INTERRUPTIONS,EXPERIENCE,IMPACT,QOE},
  language     = {eng},
  number       = {4},
  pages        = {707--714},
  publisher    = {IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS},
  title        = {Subjective quality assessment of longer duration video sequences delivered over HTTP adaptive streaming to tablet devices},
  url          = {http://dx.doi.org/10.1109/TBC.2014.2359255},
  volume       = {60},
  year         = {2014},
}

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