no code implementations • 10 Jun 2022 • Somdyuti Paul, Andrey Norkin, Alan C. Bovik
Adaptive video streaming relies on the construction of efficient bitrate ladders to deliver the best possible visual quality to viewers under bandwidth constraints.
no code implementations • 5 Oct 2021 • Somdyuti Paul, Andrey Norkin, Alan C. Bovik
Block based motion estimation is integral to inter prediction processes performed in hybrid video codecs.
no code implementations • 3 Jul 2020 • Li-Heng Chen, Christos G. Bampis, Zhi Li, Andrey Norkin, Alan C. Bovik
Mean squared error (MSE) and $\ell_p$ norms have largely dominated the measurement of loss in neural networks due to their simplicity and analytical properties.
1 code implementation • 19 Oct 2019 • Li-Heng Chen, Christos G. Bampis, Zhi Li, Andrey Norkin, Alan C. Bovik
By building on top of an existing deep image compression model, we are able to demonstrate a bitrate reduction of as much as $31\%$ over MSE optimization, given a specified perceptual quality (VMAF) level.
1 code implementation • 15 Jun 2019 • Somdyuti Paul, Andrey Norkin, Alan C. Bovik
In VP9 video codec, the sizes of blocks are decided during encoding by recursively partitioning 64$\times$64 superblocks using rate-distortion optimization (RDO).