The xvc video codec
draft-samuelsson-netvc-xvc-00

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Network Working Group                                      J. Samuelsson
Internet-Draft                                             P. Hermansson
Intended status: Standards Track                                Divideon
Expires: September 6, 2018                                 March 5, 2018

                          The xvc video codec
                     draft-samuelsson-netvc-xvc-00

Abstract

   This document presents a high-level technical description of the xvc
   video codec.  The xvc video codec is a novel video codec that was
   released in its first version in September 2017.  This document
   provides some technical information as well as a discussion section
   around how the xvc codec meets the objectives of the NETVC Working
   Group.  The document also includes results comparing a recent
   revision of xvc with recent revisions of AV1 and HM for three
   different test cases; All-Intra, single pass Random-Access, and
   multi-pass Random-Access.  The average compression gain (BD-rate for
   PSNR-Y) for xvc ranges from 3% to 20% for the different test cases.

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Samuelsson & Hermansson Expires September 6, 2018               [Page 1]
Internet-Draft             The xvc video codec                March 2018

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Technical overview of the xvc video codec . . . . . . . . . .   3
     2.1.  Block structure . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Intra prediction  . . . . . . . . . . . . . . . . . . . .   4
     2.3.  Inter prediction  . . . . . . . . . . . . . . . . . . . .   4
     2.4.  Transforms  . . . . . . . . . . . . . . . . . . . . . . .   5
     2.5.  Entropy coding  . . . . . . . . . . . . . . . . . . . . .   5
     2.6.  In-loop filtering . . . . . . . . . . . . . . . . . . . .   5
     2.7.  Restriction flags . . . . . . . . . . . . . . . . . . . .   6
     2.8.  Version handling  . . . . . . . . . . . . . . . . . . . .   6
     2.9.  Temporal scalability and parallel decoding  . . . . . . .   7
   3.  The xvc reference software  . . . . . . . . . . . . . . . . .   8
   4.  Results . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
     4.1.  All-Intra . . . . . . . . . . . . . . . . . . . . . . . .   9
     4.2.  Single pass Random-Access . . . . . . . . . . . . . . . .  10
     4.3.  Multi-pass Random-Access  . . . . . . . . . . . . . . . .  11
     4.4.  Computational complexity  . . . . . . . . . . . . . . . .  11
   5.  Discussion  . . . . . . . . . . . . . . . . . . . . . . . . .  11
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   8.  Informative References  . . . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   In September 2017, the new video compression format xvc was released,
   with source code publicly available at xvc.io [xvcio].  The xvc codec
   is a software-defined video codec with conformance for bitstreams,
   decoders, and encoders, defined with reference to the publicly
   available reference software.  The first version of xvc has been
   developed by Divideon but the source code of the reference software
   has been made publicly available with a desire to invite to broad
   usage and continuous development.  The developers of the xvc codec
   strongly believe in open, transparent and collaborative processes for
   technical development, and the purpose of this contribution is to
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