Bjontegaard_metric
Bjontegaard metric calculation. Include BD-PSNR and BD-rate.
See demo.py for usage.
References: [1] G. Bjontegaard, Calculation of average PSNR differences between RD-curves (VCEG-M33) [2] S. Pateux, J. Jung, An excel add-in for computing Bjontegaard metric and its evolution