From Event: SPIE Optical Engineering + Applications, 2017
This paper compares the coding efficiency performance on 360 videos, of three software codecs: (a) AV1 video codec
from the Alliance for Open Media (AOM); (b) the HEVC Reference Software HM; and (c) the JVET JEM Reference
SW. Note that 360 video is especially challenging content, in that one codes full res globally, but typically looks locally
(in a viewport), which magnifies errors. These are tested in two different projection formats ERP and RSP, to check
consistency. Performance is tabulated for 1-pass encoding on two fronts: (1) objective performance based on end-to-end
(E2E) metrics such as SPSNR-NN, and WS-PSNR, currently developed in the JVET committee; and (2) informal
subjective assessment of static viewports. Constant quality encoding is performed with all the three codecs for an
unbiased comparison of the core coding tools. Our general conclusion is that under constant quality coding, AV1
underperforms HEVC, which underperforms JVET. We also test with rate control, where AV1 currently underperforms
the open source X265 HEVC codec. Objective and visual evidence is provided.
Pankaj Topiwala, Wei Dai, Madhu Krishnan, Adeel Abbas, Sandeep Doshi, and David Newman, "Performance comparison of AV1, HEVC, and JVET video codecs on 360 (spherical) video," Proc. SPIE 10396, Applications of Digital Image Processing XL, 1039609 (Presented at SPIE Optical Engineering + Applications: August 07, 2017; Published: 19 September 2017); https://doi.org/10.1117/12.2272119.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 14,000 conference presentations, including many plenary and keynote presentations.
Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon