FFV1 Video Coding Format Version 4
draft-ietf-cellar-ffv1-v4-13

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cellar                                                    M. Niedermayer
Internet-Draft                                                          
Intended status: Standards Track                                 D. Rice
Expires: 3 January 2021                                                 
                                                             J. Martinez
                                                             2 July 2020

                   FFV1 Video Coding Format Version 4
                      draft-ietf-cellar-ffv1-v4-13

Abstract

   This document defines FFV1, a lossless intra-frame video encoding
   format.  FFV1 is designed to efficiently compress video data in a
   variety of pixel formats.  Compared to uncompressed video, FFV1
   offers storage compression, frame fixity, and self-description, which
   makes FFV1 useful as a preservation or intermediate video format.

Status of This Memo

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   This Internet-Draft will expire on 3 January 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Niedermayer, et al.      Expires 3 January 2021                 [Page 1]
Internet-Draft                    FFV1                         July 2020

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   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Notation and Conventions  . . . . . . . . . . . . . . . . . .   4
     2.1.  Definitions . . . . . . . . . . . . . . . . . . . . . . .   4
     2.2.  Conventions . . . . . . . . . . . . . . . . . . . . . . .   5
       2.2.1.  Pseudo-code . . . . . . . . . . . . . . . . . . . . .   5
       2.2.2.  Arithmetic Operators  . . . . . . . . . . . . . . . .   6
       2.2.3.  Assignment Operators  . . . . . . . . . . . . . . . .   6
       2.2.4.  Comparison Operators  . . . . . . . . . . . . . . . .   7
       2.2.5.  Mathematical Functions  . . . . . . . . . . . . . . .   7
       2.2.6.  Order of Operation Precedence . . . . . . . . . . . .   8
       2.2.7.  Range . . . . . . . . . . . . . . . . . . . . . . . .   8
       2.2.8.  NumBytes  . . . . . . . . . . . . . . . . . . . . . .   8
       2.2.9.  Bitstream Functions . . . . . . . . . . . . . . . . .   8
   3.  Sample Coding . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.1.  Border  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     3.2.  Samples . . . . . . . . . . . . . . . . . . . . . . . . .  10
     3.3.  Median Predictor  . . . . . . . . . . . . . . . . . . . .  11
     3.4.  Context . . . . . . . . . . . . . . . . . . . . . . . . .  11
     3.5.  Quantization Table Sets . . . . . . . . . . . . . . . . .  12
     3.6.  Quantization Table Set Indexes  . . . . . . . . . . . . .  12
     3.7.  Color spaces  . . . . . . . . . . . . . . . . . . . . . .  12
       3.7.1.  YCbCr . . . . . . . . . . . . . . . . . . . . . . . .  13
       3.7.2.  RGB . . . . . . . . . . . . . . . . . . . . . . . . .  13
     3.8.  Coding of the Sample Difference . . . . . . . . . . . . .  15
       3.8.1.  Range Coding Mode . . . . . . . . . . . . . . . . . .  15
       3.8.2.  Golomb Rice Mode  . . . . . . . . . . . . . . . . . .  20
   4.  Bitstream . . . . . . . . . . . . . . . . . . . . . . . . . .  25
     4.1.  Quantization Table Set  . . . . . . . . . . . . . . . . .  26
       4.1.1.  quant_tables  . . . . . . . . . . . . . . . . . . . .  27
       4.1.2.  context_count . . . . . . . . . . . . . . . . . . . .  28
     4.2.  Parameters  . . . . . . . . . . . . . . . . . . . . . . .  28
       4.2.1.  version . . . . . . . . . . . . . . . . . . . . . . .  30
       4.2.2.  micro_version . . . . . . . . . . . . . . . . . . . .  30
       4.2.3.  coder_type  . . . . . . . . . . . . . . . . . . . . .  31
       4.2.4.  state_transition_delta  . . . . . . . . . . . . . . .  32