Video Quality Monitoring over IP Networks

Metadata

Publisher: SMPTE — White Plains, NY
Doc Type: Conference Paper
Content Type: Original Research
Volume: 2005, No. 11, pp. 1–12
Abstract: Accurate measurement of network characteristics is critical to ensure that networks are operating optimally as designed and configured. Present network measurement metrics, such as packet loss ratio and average latency, were designed to assess the impact of network impairments on data applications. However, as IP networks are increasingly used to carry multimedia traffic such as voice-over-IP and video-over-IP, which are much more sensitive to errors than file transfer, e-mail or web traffic, these data-centric network measurement metrics have become insufficient. For example, highly-compressed MPEG video traffic exhibits a strong content correlation from one packet to the next packet, and thus, the loss of one packet may render a large number of perfectly received packets useless. One study (see [1]) shows that for a given MPEG-compressed stream, a packet loss rate as low as 3% may be translated into a video frame error rate as high as 30%. Therefore, the packet loss rate does not accurately reflect the severity of a network impairment's effect on video quality. Furthermore, as video carriers increasingly use Forward Error Correction (FEC) techniques to recover packet loss, measurement metrics designed to optimally configure the FEC operating parameters to match the network condition become highly desirable. In this paper, we review a set of traditional network measurement metrics that are commonly used for data applications and discuss the deficiencies of these metrics for providing an accurate picture of video quality. We then discuss how video quality metrics can be derived from network performance metrics using simple equations and propose video-centric network metrics to compute such quality metrics. We also show how these video-centric metrics can be used to derive a probabilistic loss model which in turn can be used to evaluate the performance of a FEC algorithm.
Publication Date: 2005-11-01
DOI: 10.5594/M00409
Link: https://doi.org/10.5594/M00409
Author(s): Henry SariowanPath 1 Network Technologies, Inc. San Diego, California, USA
Copyright: © 2005 Society of Motion Picture and Television Engineers, Inc.

Bibliographic Reference(s)

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<span class="citation">Henry Sariowan; <cite>Video Quality Monitoring over IP Networks</cite>, SMPTE Meetings and Conferences ( November 2005); SMPTE, 2005. Available at <a href="https://doi.org/10.5594/M00409" target="_blank" rel="noopener">https://doi.org/10.5594/M00409</a></span>

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Henry Sariowan; <cite id="bib-10-5594-m00409">Video Quality Monitoring over IP Networks</cite>, SMPTE Meetings and Conferences ( November 2005); SMPTE, 2005
<span class="doi">10.5594/M00409</span>
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