Beyond Bj{\o}ntegaard: Limits of Video Compression Performance Comparisons
Christian Herglotz, Matthias Kr\"anzler, Ruben Mons, Andr\'e Kaup

TL;DR
This paper critically examines the limitations of the Bj{\
Contribution
It introduces a new Akima interpolation method that improves the accuracy of performance metric comparisons in video codec evaluation.
Findings
Akima interpolation outperforms traditional methods in accuracy
Approximation error is below 1.5% for various metrics
Validates the use of advanced interpolation for diverse performance metrics
Abstract
For 20 years, the gold standard to evaluate the performance of video codecs is to calculate average differences between ratedistortion curves, also called the "Bj{\o}ntegaard Delta". With the help of this tool, the compression performance of codecs can be compared. In the past years, we could observe that the calculus was also deployed for other metrics than bitrate and distortion in terms of peak signal-to-noise ratio, for example other quality metrics such as video multi-method assessment fusion or hardware-dependent metrics such as the decoding energy. However, it is unclear whether the Bj{\o}ntegaard Delta is a valid way to evaluate these metrics. To this end, this paper reviews several interpolation methods and evaluates their accuracy using different performancemetrics. As a result, we propose to use a novel approach based on Akima interpolation, which returns the most accurate…
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Taxonomy
TopicsAdvanced Data Compression Techniques · Video Coding and Compression Technologies · Sparse and Compressive Sensing Techniques
