Thor Video Codec
draft-fuldseth-netvc-thor-03

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Last updated 2016-10-31
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Network Working Group                                        A. Fuldseth
Internet-Draft                                            G. Bjontegaard
Intended status: Standards Track                           S. Midtskogen
Expires: May 4, 2017                                           T. Davies
                                                               M. Zanaty
                                                                   Cisco
                                                        October 31, 2016

                            Thor Video Codec
                      draft-fuldseth-netvc-thor-03

Abstract

   This document provides a high-level description of the Thor video
   codec.  Thor is designed to achieve high compression efficiency with
   moderate complexity, using the well-known hybrid video coding
   approach of motion-compensated prediction and transform coding.

Status of This Memo

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   This Internet-Draft will expire on May 4, 2017.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (http://trustee.ietf.org/license-info) in effect on the date of
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   include Simplified BSD License text as described in Section 4.e of

Fuldseth, et al.           Expires May 4, 2017                  [Page 1]
Internet-Draft              Thor Video Codec                October 2016

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   5
     2.2.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   6
   3.  Block Structure . . . . . . . . . . . . . . . . . . . . . . .   6
     3.1.  Super Blocks and Coding Blocks  . . . . . . . . . . . . .   6
     3.2.  Special Processing at Frame Boundaries  . . . . . . . . .   7
     3.3.  Transform Blocks  . . . . . . . . . . . . . . . . . . . .   8
     3.4.  Prediction Blocks . . . . . . . . . . . . . . . . . . . .   8
   4.  Intra Prediction  . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Inter Prediction  . . . . . . . . . . . . . . . . . . . . . .   9
     5.1.  Multiple Reference Frames . . . . . . . . . . . . . . . .   9
     5.2.  Bi-Prediction . . . . . . . . . . . . . . . . . . . . . .  10
     5.3.  Improved chroma prediction  . . . . . . . . . . . . . . .  10
     5.4.  Reordered Frames  . . . . . . . . . . . . . . . . . . . .  10
     5.5.  Interpolated Reference Frames . . . . . . . . . . . . . .  10
     5.6.  Sub-Pixel Interpolation . . . . . . . . . . . . . . . . .  10
       5.6.1.  Luma Poly-phase Filter  . . . . . . . . . . . . . . .  10
       5.6.2.  Luma Special Filter Position  . . . . . . . . . . . .  12
       5.6.3.  Chroma Poly-phase Filter  . . . . . . . . . . . . . .  13
     5.7.  Motion Vector Coding  . . . . . . . . . . . . . . . . . .  13
       5.7.1.  Inter0 and Inter1 Modes . . . . . . . . . . . . . . .  13
       5.7.2.  Inter2 and Bi-Prediction Modes  . . . . . . . . . . .  15
       5.7.3.  Motion Vector Direction . . . . . . . . . . . . . . .  16
   6.  Transforms  . . . . . . . . . . . . . . . . . . . . . . . . .  16
   7.  Quantization  . . . . . . . . . . . . . . . . . . . . . . . .  16
     7.1.  Quantization matrices . . . . . . . . . . . . . . . . . .  17
       7.1.1.  Quantization matrix selection . . . . . . . . . . . .  17
       7.1.2.  Quantization matrix design  . . . . . . . . . . . . .  18
   8.  Loop Filtering  . . . . . . . . . . . . . . . . . . . . . . .  18
     8.1.  Deblocking  . . . . . . . . . . . . . . . . . . . . . . .  18
       8.1.1.  Luma deblocking . . . . . . . . . . . . . . . . . . .  18
       8.1.2.  Chroma Deblocking . . . . . . . . . . . . . . . . . .  19
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