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NOTICE
Consumer Technology Association (CTA)™ Standards, Bulletins and other technical publications
are designed to serve the public interest through eliminating misunderstandings between
manufacturers and purchasers, facilitating interchangeability and improvement of products, and
assisting the purchaser in selecting and obtaining with minimum delay the proper product for his
particular need. Existence of such Standards, Bulletins and other technical publications shall not in
any respect preclude any member or nonmember of the Consumer Technology Association from
manufacturing or selling products not conforming to such Standards, Bulletins or other technical
publications, nor shall the existence of such Standards, Bulletins and other technical publications
preclude their voluntary use by those other than Consumer Technology Association members,
whether the standard is to be used either domestically or internationally.
Standards, Bulletins and other technical publications are adopted by the Consumer Technology
Association in accordance with the American National Standards Institute (ANSI) patent policy.
By such action, the Consumer Technology Association does not assume any liability to any patent
owner, nor does it assume any obligation whatever to parties adopting the Standard, Bulletin or
other technical publication.
This document does not purport to address all safety problems associated with its use or all
applicable regulatory requirements. It is the responsibility of the user of this document to establish
appropriate safety and health practices and to determine the applicability of regulatory limitations
before its use.
This document is copyrighted by the Consumer Technology Association (CTA)™ and may not be
reproduced, in whole or part, without written permission. Federal copyright law prohibits
unauthorized reproduction of this document by any means. Organizations may obtain permission
to reproduce a limited number of copies by entering into a license agreement. Requests to
reproduce text, data, charts, figures or other material should be made to the Consumer Technology
Association (CTA)™.
(Formulated under the cognizance of the CTA R4.8 DTV Interface Subcommittee.)
Published by
CONSUMER TECHNOLOGY ASSOCIATION 2016
Technology & Standards Department
www.cta.tech
All rights reserved
CTA-861-G
i
Contents
1 Scope....................................................................................................................................................... 10
2 General .................................................................................................................................................... 10
2.1 References ...................................................................................................................................... 10
2.1.1 Normative References .............................................................................................................. 10
2.1.1.1 Normative Reference List ................................................................................................ 10
2.1.1.2 Normative Reference Acquisition .................................................................................. 12
2.1.2 Informative References ............................................................................................................ 13
2.1.2.1 Informative Document List .............................................................................................. 13
2.1.2.2 Informative Document Acquisition ................................................................................ 15
2.2 Definitions ....................................................................................................................................... 16
2.3 Symbols and Abbreviations .......................................................................................................... 21
2.4 Compliance Notation ...................................................................................................................... 23
2.5 Hexadecimal Notation .................................................................................................................... 23
2.6 HxV Video Timing Notation ........................................................................................................... 23
2.7 Bit Naming Conventions ................................................................................................................ 23
2.8 ASCII Codes, Characters & Strings .............................................................................................. 23
3 Overview ................................................................................................................................................. 23
3.1 General Video Format Requirements for Sources ...................................................................... 24
3.2 General Video Format Requirements for Sinks ........................................................................... 24
4 Video Formats and Waveform Timings ............................................................................................... 25
4.1 Aspect Ratio .................................................................................................................................... 39
4.2 Frame Rate Relationships ............................................................................................................. 45
5 Color Encoding, Sampling, & Conversion ........................................................................................... 46
5.1 Default Encoding Parameters ....................................................................................................... 46
5.2 Color Component Samples ........................................................................................................... 46
5.2.1 RGB-to-YC
B
C
R
Conversion Matrices....................................................................................... 46
5.2.2 Sample Lattice........................................................................................................................... 47
5.3 Transfer Characteristic (e.g., gamma correction) ....................................................................... 48
5.4 Color Coding & Quantization ........................................................................................................ 49
6 Auxiliary Information Carried from Source to Sink ............................................................................ 50
6.1 Vendor-Specific InfoFrames .......................................................................................................... 51
6.1.1 Multiple VSIF Handling ............................................................................................................. 52
6.2 Auxiliary Video Information (AVI) InfoFrame ............................................................................... 53
6.3 Format of Version 1 AVI InfoFrame .............................................................................................. 53
6.4 Format of Version 2, 3, & 4 AVI InfoFrames ................................................................................. 53
6.5 Source Product Description (SPD) InfoFrame ............................................................................. 71
6.6 Audio InfoFrame ............................................................................................................................. 73
6.6.1 Audio Identification Information ............................................................................................. 75
6.6.2 Speaker Mapping and Down-mix Information ....................................................................... 77
6.6.3 Delivery According to the Speaker Mask (Byte 4 = 0xFE) .................................................... 81
6.6.4 Delivery by Channel Index (Byte 4 = 0xFF) ............................................................................ 82
6.6.5 Additional Audio InfoFrame Information ................................................................................ 82
6.7 MPEG Source InfoFrame ............................................................................................................... 82
6.8 NTSC VBI InfoFrame....................................................................................................................... 83
6.9 Dynamic Range and Mastering InfoFrame ................................................................................... 84
6.9.1 Static Metadata Type 1 ............................................................................................................. 85
6.10 Extended InfoFrame ..................................................................................................................... 87
CTA-861-G
ii
6.10.1 HDR Dynamic Metadata Extended InfoFrame ...................................................................... 88
7 EDID Data Structure ............................................................................................................................... 90
7.1 Use of CTA Extensions .................................................................................................................. 90
7.2 Describing Video Formats in EDID ............................................................................................... 91
7.2.1 Use of EDID Detailed Timing Descriptors .............................................................................. 91
7.2.2 Order of Dual-Aspect Ratio Detailed Timing Descriptors .................................................... 93
7.2.3 Source Requirements and Recommendations ...................................................................... 93
7.3 CTA Extension Version 1 ............................................................................................................... 93
7.4 CTA Extension Version 2 ............................................................................................................... 95
7.5 CTA Extension Version 3 ............................................................................................................... 95
7.5.1 Video Data Block..................................................................................................................... 100
7.5.2 Audio Data Block .................................................................................................................... 102
7.5.3 Speaker Allocation Data Block .............................................................................................. 104
7.5.4 Vendor-Specific Data Block ................................................................................................... 104
7.5.5 Colorimetry Data Block .......................................................................................................... 105
7.5.6 Video Capability Data Block .................................................................................................. 106
7.5.7 Vendor-Specific Video Data Block................................................................................... 108
7.5.8 Vendor-Specific Audio Data Block .................................................................................. 109
7.5.9 InfoFrame Data Block ....................................................................................................... 109
7.5.10 YC
B
C
R
4:2:0 Video Data Block .......................................................................................... 111
7.5.11 YC
B
C
R
4:2:0 Capability Map Data Block .......................................................................... 112
7.5.12 Video Format Preference Data Block .............................................................................. 113
7.5.13 HDR Static Metadata Data Block...................................................................................... 114
7.5.14 HDR Dynamic Metadata Data Block .................................................................................... 115
7.5.15 Room Configuration Data Block ......................................................................................... 117
7.5.16 Speaker Location Data Block .............................................................................................. 118
7.5.16.1 Room Coordinate System ........................................................................................... 119
Annex A Baseline Example EDID and Detailed Timing Descriptors (Informative) ........................... 121
A.1 Background .................................................................................................................................. 121
A.2 EDID Tables .................................................................................................................................. 121
A.2.1 EDID Table Construction ....................................................................................................... 121
A.2.2 Detailed Explanation of EDID Block Zero ............................................................................ 122
A.2.3 Block Zero Header Section ................................................................................................... 122
A.2.4 Vendor / Product Identification ............................................................................................. 122
A.2.5 EDID Version ........................................................................................................................... 123
A.2.6 Basic Display Parameters and Features .............................................................................. 124
A.2.7 Color Characteristics ............................................................................................................. 126
A.2.8 Established Timings .............................................................................................................. 127
A.2.9 Standard Timing ID #1 – 8 ..................................................................................................... 128
A.2.10 Detailed Timing Descriptor Block....................................................................................... 128
A.2.10.1 First Detailed Timing Descriptor ................................................................................ 128
A.2.10.2 Second Detailed Timing Descriptor .......................................................................... 129
A.2.10.3 First Monitor Descriptor (Monitor Name) .................................................................. 130
A.2.10.4 Second Monitor Descriptor (Monitor Range Limits) ................................................ 131
A.2.11 Extension Flag and Checksum ........................................................................................... 132
A.2.11.1 Block One Details ........................................................................................................ 133
A.2.12 Overview of Extensions ....................................................................................................... 133
A.2.13 Block One CTA Extension Header...................................................................................... 134
A.2.14 Third Detailed Timing Descriptor ....................................................................................... 135
A.2.15 Fourth Detailed Timing Descriptor ..................................................................................... 135
A.2.16 Descriptor Defined by Manufacturer .................................................................................. 136
A.2.17 Monitor Serial Number ......................................................................................................... 137
A.2.18 Residual Byte Padding and Check Sum ............................................................................ 137
A.2.19 Hot Plugging Sequence ....................................................................................................... 139
CTA-861-G
iii
A.2.20 InfoFrame Data Block .......................................................................................................... 140
A.3 Complete Example EDID Table (Informative) ............................................................................ 141
A.4 Example EDID Detailed Timing Descriptors .............................................................................. 148
Annex B Application to DVI 1.0 (Normative) ........................................................................................ 160
B.1 Connector and Cable ................................................................................................................... 160
B.2 Digital Content Protection ........................................................................................................... 160
Annex C Application to Open LDI (Normative) .................................................................................... 161
C.1 Open LDI Data and Control Signals ........................................................................................... 161
C.2 Non DC Balanced Mode .............................................................................................................. 161
C.3 OpenLDI Cabling Information ..................................................................................................... 161
C.3.1 Cable Length ........................................................................................................................... 162
C.3.2 Number of Signal Conductors .............................................................................................. 162
C.3.3 Wire Gauge ............................................................................................................................. 162
C.3.4 Conductor Resistance ........................................................................................................... 162
C.3.5 Insulation ................................................................................................................................ 162
C.3.6 Shield Requirement ............................................................................................................... 162
C.3.7 Single Twisted Pair Transmission Skew ............................................................................. 162
C.3.8 Multiple Twisted Pair Transmission Skew ........................................................................... 162
C.3.9 USB Cable Requirements ...................................................................................................... 162
C.3.10 DDC Cable Requirements .................................................................................................... 162
Annex D Application to HDMI (Informative) ......................................................................................... 163
D.1 InfoPackets ................................................................................................................................... 163
D.2 EDID ............................................................................................................................................... 163
D.3 Audio ............................................................................................................................................. 163
D.4 HDCP ............................................................................................................................................. 163
D.5 Additional Information ................................................................................................................. 163
D.6 Example EDID Using Elements of CTA Block Tag Extension (Applicable to HDMI) ............. 163
D.6.1 First Monitor Descriptor (Monitor Name) and Second Monitor Descriptor (Monitor Range
Limits) ............................................................................................................................................... 163
D.6.2 Extension Flag and Checksum ............................................................................................. 164
D.6.3 CTA Extension Header (Block 1) .......................................................................................... 164
D.6.4 CTA Data Block Collection .................................................................................................... 164
D.6.5 Video Data Block .................................................................................................................... 164
D.6.6 CTA Audio Block .................................................................................................................... 165
D.6.7 Speaker Allocation Block ...................................................................................................... 165
D.6.8 Vendor-Specific Block ........................................................................................................... 166
D.6.9 Complete CTA-861 Example with Block Tag Extension..................................................... 167
Annex E [Reserved for Future Use] ...................................................................................................... 176
Annex F Guidance for Source & Sinks (Informative) .......................................................................... 177
F.1 Overview ........................................................................................................................................ 177
F.2 Background ................................................................................................................................... 177
F.3 Guidance for Sources .................................................................................................................. 177
F.3.1 Stable Video Format ............................................................................................................... 178
F.3.2 Changing Video Format ......................................................................................................... 178
F.3.3 Optional User Controlled Setting .......................................................................................... 180
F.3.4 Non-Default Scenarios ........................................................................................................... 180
F.3.5 Errors Reading the EDID ........................................................................................................ 181
F.3.6 Video Timing Transition (AVMUTE Recommendation) ...................................................... 182
F.4 Guidance for Sinks ....................................................................................................................... 182
F.4.1 Valid Read-Only EDID ............................................................................................................ 182
F.4.2 Ordering of the Video Formats in the EDID ......................................................................... 182
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