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technical

This article provides a comprehensive overview of the history of objective video quality measurement, touching on the current methods used as well as new research into the HVS that enables operators to deliver more consistent, superior video quality. By Noam Koren, Vice President, Advanced System Development at Harmonic and How it is being Leveraged to Improve Video Quality Measurements An Update on the Human Visual System

According to the latest industry research 1 , online video will be responsible for four-fifths of global internet traffic by 2019. Faced with delivering an ever-increasing number of video streams, Over the Top (OTT) content providers and Pay-TV operators are finding it challenging to provide consistent, high- quality video experiences on every device while keeping capital and operational costs low. This is partly because traditional approaches to assessing video quality in an objective manner are limited. Measuring the video quality of encoded content is a subject that has been discussed by experts for decades without an agreement being reached on the subject. Traditional methods were based on mathematical calculation of the image distortion. These methods were proved to be inaccurate. Objective video quality measurement is complicated. Its primary goal is to calculate video quality as it is seen by the Human Visual System (HVS). However, everyone perceives

Noam Koren is the Vice President of Advanced System Development at Harmonic. In this role, Noam, with his team, research and implement Noam Koren Vice President of Advanced System Development, Harmonic

innovative technologies and solutions with a focus on the needs of Harmonic’s customers. Noam and his team work directly with customers to identify issues and then work together on the solutions. Projects developed by Noam’s team won the CableLabs' innovation competition twice as “the product that is most likely to succeed” (2007, 2008), as well as the Emmy award in 2015. Noam has 24 years of experience in networking, video processing and compression and system architecture. He holds a Bachelor of Science in Electrical Engineering from the Israel Institute of Technology and is also the holder of seven U.S. patents.

1 http://tubularinsights.com/2019-internet-video-traffic/

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Vol. 38 No. 4 - November 2016 Issue