NETVC IETF 97 Date: November 15, 2016 Location: Seoul, Republic of Korea Area Director: Alissa Cooper Chairs: Adam Roach, Mo Zanaty Minutes: Stephen Botzko ---- Requirements & Testing Docs Is there value in publishing these? Note IESG guidance not to publish them unless they are useful. Consensus is that is value in publishing both, and that we will do so. ---- draft-ietf-netvc-requirements-03 Basic requirement - support independently decodable sub-frame units. QP-points reduced from 12->10, with alignment only done on four points. MS-SSIM now is luma only. At least one more revision before publication, intention is to publish after that version is reviewed. ---- draft-ietf-netvc-testing-03 Metric Updates FastSSIM dropped in favor of MS-SSIM VMAF RD uses values directly in RD curves Range Updates Indiviual tool testing - 4 quantizers final testing - 10 qp points 240P and HDR clips need to be added; set not finalized in time for this draft version. Rate Control testing methodology is also not included. Likely 3 months away from finalizing this document. ---- draft-fuldseth-netvc-thor-03 - 10 and 12 bit video - high internal precision regardless of imput - various optimations - 8, 10, 12 bit input, with 8, 10, 12 bit internal bit depth. Luma gains with 8 bit input using 10 bit internal bit depth: ~3.8 db gain at HD. Goes up to 4.3 DB at 12-bit internal bit depth. Gains higher for chroma. some discsussion on whether the gains were perceptual, some suggestion that chroma gains should shifted to luma. 256-bit generic intrinsics Not required for standardization, but useful to assess real-world complexity. added so v128_add_8 could becomd v256_add_16, etc. ---- Daala Update Fixed Point PVQ completed Daala Entropy Coder now the default in AV1. FASTSSIM overflow fixed, original results were somewhat too high (revised results not quite as good as original) Deringing filter changes (AV1) - shorter 5-tap for chrome gave big gains on some sequences - now works with 4:2:2 by disabling chroma deringing - simpler threshold for second filter. - significant speed improvement. future Plans - enable perceptual tools in PVQ - continue port to AV1. ---- PVQ outside of Daala Bit-rate close to AV1 w/o PVQ encoding Speed remains a problem More work needed.