How PSNR Compares to VMAF and SSIMplus

As quality metrics go, PSNR is considered a blunt tool obsoleted by higher end metrics like Netflix’s VMAF or SSIMwave’s SSIMplus. That said, it’s accessible and understood, and has been used for years. Of course, none of that matters if it delivers misleading results. So that’s what I decided to test in a round of two…

Cloud Pricing Survey Shows Hybrik Least Expensive Option By Far

I recently finished a white paper comparing the pricing for a new cloud encoding service named Hybrik with multiple cloud providers, including Amazon Elastic Transcoder, Microsoft Azure, Bitmovin, encoding.com, Telestream Cloud, and Zencoder. The white-paper was sponsored by Hybrik, and you can download it below. By way of background, I ran all calculations by the respective services…

Book Excerpt: VBV Buffer Explained

This article is kind of a prequel to my book, Encoding by the Numbers, which I published in 2016. That is, I published this article to get commentary from folks who read it, which I factored back into my book. Unfortunately, I changed content management systems in 2018 and lost the comments.  One of the…

Beamr Technology Assessment

I recently finished evaluating Beamr Video. The evaluation included analyzing the quality of the resulting clips using objective measures such as PSNR, SSIM and VQM, and conducting extensive viewing of the optimized clips, assessing their subjective quality compared to the original clips. Following this evaluation, I concluded that “for 99.99% of the expert and average…