Table of Contents

Foreword
1 Scope
2 Normative references
3 Definitions, symbols and abbreviations
  3.1 Definitions
  3.2 Symbols and abbreviations
4 Overview
5 ISO/IEC 9281, Part 1, syntax and switching structure
  5.1 Overall switching of coding environment
  5.2 Switching into the photographic mode
  5.3 ISO/IEC 9281, Part 1, syntax structure
6 Coding of the Picture Data Entity (PDE)
  6.1 Introduction
  6.2 PDE data content identification mechanism
7 Photographic header
  7.1 Introduction
  7.2 Header structure
  7.3 Header functionalities
8 Coding rules
  8.1 Purpose
  8.2 General rules for coding the header
  8.3 Photographic header code assignment
  8.4 Encoding of photographic header parameters
9 Photographic data
  9.1 Introduction
  9.2 Translation modes
10 Defaults
  10.1 Default values for photographic header
       attributes
  10.2 Default tables
11 Photographic profiles
  11.1 Compatible photographic profiles (P1 to P5)
  11.2 Private choice of photographic profile (Ppriv)
Annex A (informative): Photovideotex tutorial
  A.1 Introduction
  A.2 The present state of photovideotex
  A.3 Image representation
  A.4 The JPEG compression technique
  A.5 The baseline system
  A.6 The extended system
  A.7 Summary
  A.8 Bibliography
Annex B (informative): Implementation guidelines on
                       display rendering
  B.1 Introduction
  B.2 Rendering of resolution
  B.3 The concept of normalised colour space
Annex C (informative): Solutions for common compatible
                       photovideotex databases serving
                       different resolution terminals
  C.1 Introduction
  C.2 Hierarchical mode
  C.3 Special spectral selection
Annex D (informative): Coding examples
  D.1 Introduction
  D.2 Image positioning examples
  D.3 Example for Source Picture Comments (PCT)
Annex E (informative): ETSI/ITU-T-CCITT Cross-reference
                       list
Annex F (normative): Encoding parameters values for the
                     2:1:1
  F.1 Introduction
  F.2 Encoding parameters for 2:1:1
Annex G (normative): Translation modes
  G.1 Mode 0 (No translation, full transparency)
  G.2 Mode 2 (3-in-4 coding)
  G.3 Mode 4 (Shift scheme - 7 bits)
Annex H (informative): Huffman tables for the "special
                       spectral selection"
  H.1 Introduction
  H.2 Spectral bands
  H.3 Luminance DC differences
  H.4 Chrominance DC differences
  H.5 Luminance AC coefficients
  H.6 Chrominance AC coefficients
Annex J (informative): Examples of local presentation
                       facilities with T4 and T6 encoded
                       data
  J.1 Local presentation facilities
  J.2 Local presentation modes
History

Abstract

Specifies the data syntax to be used by Videotex services for conveying photographic data. Applies to the interchange of photographic data via storage or transmission media. Applies to Videotex terminals connected to various types of telecommunication networks.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	European Telecommunications Standards Institute
Pages
ISBN
Committee	TE 1