Quality assessment of High Definition TV distribution over IP networks

Issa, Omneya; Li, Wei; Liu, Hong; Speranza, Filippo; Renaud, Ron

doi:10.1109/isbmsb.2009.5133798

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…Our results show that users tolerate up to two visual impairments during movie playback, which corresponds with the recommended QoE requirements for SD. Issa et al [18] showed that in the case of HDTV, the recommended mean time between visible distortions can be relaxed to some extent. As a final result, we tested the significance between the MOS scores of SNR and temporal downscaled short sequences.…”

Section: Mosmentioning

confidence: 99%

Assessing Quality of Experience of IPTV and Video on Demand Services in Real-Life Environments

Staelens

Moens

Broeck³

et al. 2010

IEEE Trans. on Broadcast.

153

108

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Abstract-The ever growing bandwidth in access networks, in combination with IPTV and Video on Demand (VoD) offerings, opens up unlimited possibilities to the users. The operators can no longer compete solely on the number of channels or content and increasingly make High Definition channels and Quality of Experience (QoE) a service differentiator. Currently the most reliable way of assessing and measuring QoE is conducting subjective experiments, where human observers evaluate a series of short video sequences, using one of the international standardized subjective quality assessment methodologies. Unfortunately, since these subjective experiments need to be conducted in controlled environments and pose limitations on the sequences and overall experiment duration they cannot be used for reallife QoE assessment of IPTV and VoD services. In this article, we propose a novel subjective quality assessment methodology based on full length movies. Our methodology enables audiovisual quality assessment in the same environments and under the same conditions users typically watch television. Using our new methodology we conducted subjective experiments and compared the outcome with the results from a subjective test conducted using a standardized method. Our findings indicate significant differences in terms of impairment visibility and tolerance and highlight the importance of real-life QoE assessment.

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Section: Mosmentioning

confidence: 99%

Assessing Quality of Experience of IPTV and Video on Demand Services in Real-Life Environments

Staelens

Moens

Broeck³

et al. 2010

IEEE Trans. on Broadcast.

153

108

View full text Add to dashboard Cite

show abstract

“…Subjective tests were also conducted in related works, but only one bitrate (12MBit/s) and interlaced material was considered [5], [6]. Also only one setting for H.264/AVC was used in these contributions and no alternative encoders were included.…”

Section: Introductionmentioning

confidence: 99%

Visual quality of current coding technologies at high definition IPTV bitrates

Keimel

Habigt

et al. 2010

2010 IEEE International Workshop on Multimedia Signal Processing

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Abstract-High definition video over IP based networks (IPTV) has become a mainstay in today's consumer environment. In most applications, encoders conforming to the H.264/AVC standard are used. But even within one standard, often a wide range of coding tools are available that can deliver a vastly different visual quality. Therefore we evaluate in this contribution different coding technologies, using different encoder settings of H.264/AVC, but also a completely different encoder like Dirac. We cover a wide range of different bitrates from ADSL to VDSL and different content, with low and high demand on the encoders. As PSNR is not well suited to describe the perceived visual quality, we conducted extensive subject tests to determine the visual quality. Our results show that for currently common bitrates, the visual quality can be more than doubled, if the same coding technology, but different coding tools are used.

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“…Network losses are considered additionally, with a lower stress put on it. Another research published recently in [9] is dedicated exclusively to network losses. Correlation of three existing quality metrics was verified upon the subjective results, namely PSNR, SSIM [10] and VQM [7].…”

Section: Introductionmentioning

confidence: 99%

How to Build an Objective Model for Packet Loss Effect on High Definition Content Based on SSIM and Subjective Experiments

Romaniak

Janowski

2010

Lecture Notes in Computer Science

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Abstract. In this paper the authors present a methodology for building a model for packet loss effect on High Definition video content. The goal is achieved using the SSIM video quality metric, temporal pooling techniques and content characteristics. Subjective tests were performed in order to verify proposed models. An influence of several network loss patterns on diverse video content is analyzed. The paper deals also with encountered difficulties and presents intermediate steps to give a better understanding of the final result. The research aims at the perceived evaluation of a network performance for IPTV and video surveillance systems. The final model is generic and shows high correlation with the subjective results.. . .

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Quality assessment of High Definition TV distribution over IP networks

Cited by 5 publications

References 9 publications

Assessing Quality of Experience of IPTV and Video on Demand Services in Real-Life Environments

Assessing Quality of Experience of IPTV and Video on Demand Services in Real-Life Environments

Visual quality of current coding technologies at high definition IPTV bitrates

How to Build an Objective Model for Packet Loss Effect on High Definition Content Based on SSIM and Subjective Experiments

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