ITU-T Recommendation H.261

Date of adoption: 03/1993

Title: Video codec for audiovisual services at p x 64 kbit/s

Table of Contents

FOREWORD
CONTENTS
VIDEO CODEC FOR AUDIOVISUAL SERVICES AT p 64 kbit/s
1 Scope
2 Brief specification
  2.1 Video input and output
  2.2 Digital output and input
  2.3 Sampling frequency
  2.4 Source coding algorithm
  2.5 Bit rate
  2.6 Symmetry of transmission
  2.7 Error handling
  2.8 Multipoint operation
3 Source coder
  3.1 Source format
  3.2 Video source coding algorithm
  3.3 Coding control
  3.4 Forced updating
4 Video multiplex coder
  4.1 Data structure
  4.2 Video multiplex arrangement
  4.3 Multipoint considerations
5 Transmission coder
  5.1 Bit rate
  5.2 Video data buffering
  5.3 Video coding delay
  5.4 Forward error correction for coded video signal
Annex A - Inverse transform accuracy specification
Annex B - Hypothetical reference decoder
Annex C - Codec delay measurement method
Annex D - Still image transmission
D.1 Introduction
D.2 Still image format
D.3 Picture layer multiplex
D.4 Multipoint considerations
D.5 Other considerations