Video Codec Testing and Quality Measurement
draft-ietf-netvc-testing-00

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Last updated 2015-11-30
Replaces draft-daede-netvc-testing
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Network Working Group                                           T. Daede
Internet-Draft                                                   Mozilla
Intended status: Informational                         November 30, 2015
Expires: June 02, 2016

              Video Codec Testing and Quality Measurement
                      draft-ietf-netvc-testing-00

Abstract

   This document describes guidelines and procedures for evaluating an
   internet video codec specified at the IETF.  This covers subjective
   and objective tests, test conditions, and materials used for the
   test.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Internet-Drafts are draft documents valid for a maximum of six months
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   This Internet-Draft will expire on June 02, 2016.

Copyright Notice

   Copyright (c) 2015 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
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Subjective Metrics  . . . . . . . . . . . . . . . . . . . . .   2
     2.1.  Still Image Pair Comparison . . . . . . . . . . . . . . .   2
   3.  Objective Metrics . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  PSNR  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  PSNR-HVS-M  . . . . . . . . . . . . . . . . . . . . . . .   3
     3.3.  SSIM  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
     3.4.  Fast Multi-Scale SSIM . . . . . . . . . . . . . . . . . .   4
   4.  Comparing and Interpreting Results  . . . . . . . . . . . . .   4
     4.1.  Graphing  . . . . . . . . . . . . . . . . . . . . . . . .   4
     4.2.  Bjontegaard . . . . . . . . . . . . . . . . . . . . . . .   4
     4.3.  Ranges  . . . . . . . . . . . . . . . . . . . . . . . . .   5
   5.  Test Sequences  . . . . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Sources . . . . . . . . . . . . . . . . . . . . . . . . .   5
     5.2.  Test Sets . . . . . . . . . . . . . . . . . . . . . . . .   6
     5.3.  Operating Points  . . . . . . . . . . . . . . . . . . . .   7
       5.3.1.  High Latency  . . . . . . . . . . . . . . . . . . . .   7
       5.3.2.  Unconstrained Low Latency . . . . . . . . . . . . . .   8
       5.3.3.  Constrained Low Latency . . . . . . . . . . . . . . .   8
   6.  Automation  . . . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Informative References  . . . . . . . . . . . . . . . . . . .   9
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   When developing an internet video codec, changes and additions to the
   codec need to be decided based on their performance tradeoffs.  In
   addition, measurements are needed to determine when the codec has met
   its performance goals.  This document specifies how the tests are to
   be carried about to ensure valid comparisons and good decisions.

2.  Subjective Metrics

   Subjective testing is the preferable method of testing video codecs.

   Because the IETF does not have testing resources of its own, it has
   to rely on the resources of its participants.  For this reason, even
   if the group agrees that a particular test is important, if no one
   volunteers to do it, or if volunteers do not complete it in a timely
   fashion, then that test should be discarded.  This ensures that only
   important tests be done in particular, the tests that are important
   to participants.

2.1.  Still Image Pair Comparison

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   A simple way to determine superiority of one compressed image over
   another is to visually compare two compressed images, and have the
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