1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T H.273 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (12/2016) SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services Coding of moving video Coding-independent code points for video signal type
2、 identification Recommendation ITU-T H.273 ITU-T H-SERIES RECOMMENDATIONS AUDIOVISUAL AND MULTIMEDIA SYSTEMS CHARACTERISTICS OF VISUAL TELEPHONE SYSTEMS H.100H.199 INFRASTRUCTURE OF AUDIOVISUAL SERVICES General H.200H.219 Transmission multiplexing and synchronization H.220H.229 Systems aspects H.230
3、H.239 Communication procedures H.240H.259 Coding of moving video H.260H.279 Related systems aspects H.280H.299 Systems and terminal equipment for audiovisual services H.300H.349 Directory services architecture for audiovisual and multimedia services H.350H.359 Quality of service architecture for aud
4、iovisual and multimedia services H.360H.369 Telepresence H.420H.429 Supplementary services for multimedia H.450H.499 MOBILITY AND COLLABORATION PROCEDURES Overview of Mobility and Collaboration, definitions, protocols and procedures H.500H.509 Mobility for H-Series multimedia systems and services H.
5、510H.519 Mobile multimedia collaboration applications and services H.520H.529 Security for mobile multimedia systems and services H.530H.539 Security for mobile multimedia collaboration applications and services H.540H.549 Mobility interworking procedures H.550H.559 Mobile multimedia collaboration i
6、nter-working procedures H.560H.569 BROADBAND, TRIPLE-PLAY AND ADVANCED MULTIMEDIA SERVICES Broadband multimedia services over VDSL H.610H.619 Advanced multimedia services and applications H.620H.629 Ubiquitous sensor network applications and Internet of Things H.640H.649 IPTV MULTIMEDIA SERVICES AND
7、 APPLICATIONS FOR IPTV General aspects H.700H.719 IPTV terminal devices H.720H.729 IPTV middleware H.730H.739 IPTV application event handling H.740H.749 IPTV metadata H.750H.759 IPTV multimedia application frameworks H.760H.769 IPTV service discovery up to consumption H.770H.779 Digital Signage H.78
8、0H.789 E-HEALTH MULTIMEDIA SERVICES AND APPLICATIONS Personal health systems H.810H.819 Interoperability compliance testing of personal health systems (HRN, PAN, LAN, TAN and WAN) H.820H.859 Multimedia e-health data exchange services H.860H.869 For further details, please refer to the list of ITU-T
9、Recommendations. Rec. ITU-T H.273 (12/2016) i Recommendation ITU-T H.273 Coding-independent code points for video signal type identification Summary Recommendation ITU-T H.273 defines various code points and fields that establish properties of a video (or still image) representation and are independ
10、ent of the compression encoding and bit rate. These properties may describe the appropriate interpretation of decoded data or may, similarly, describe the characteristics of such a signal before the signals compressed by an encoder that is suitable for compressing such an input signal. The text was
11、developed as a twin text Recommendation corresponding to the video code points in ISO/IEC 23001-8:2016 and its Amendment 1 in collaboration with ISO/IEC JTC 1 SC 29/WG 11 (MPEG). It is published as technically aligned twin text by both organizations (ITU-T and ISO/IEC). History Edition Recommendatio
12、n Approval Study Group Unique ID* 1.0 ITU-T H.273 2016-12-22 16 11.1002/1000/12907 Keywords Code points, colour, colour primaries, frame packing, matrix coefficients, sample aspect ratio, transfer characteristics, video, image * To access the Recommendation, type the URL http:/handle.itu.int/ in the
13、 address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T H.273 (12/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications,
14、information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on
15、a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid dow
16、n in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication
17、administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory
18、 provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attent
19、ion to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others
20、outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent th
21、e latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T H.273 (12/2016) iii
22、CONTENTS Page 1 Scope 1 2 Normative references 1 2.1 Identical Recommendations | International Standards 1 2.2 Paired Recommendations | International Standards equivalent in technical content . 1 2.3 Additional references 1 3 Definitions 1 4 Abbreviations . 2 5 Conventions 2 5.1 Arithmetic operators
23、 2 5.2 Relational operators. 2 5.3 Bit-wise operators . 2 5.4 Mathematical functions . 3 6 Specified code points 3 7 Principles for definition and referencing of code points . 4 7.1 Code point encoding and defaults . 4 7.2 Externally defined values 4 7.3 Reference format . 4 8 Video code points . 4
24、8.1 Colour primaries 4 8.2 Transfer characteristics . 6 8.3 Matrix coefficients 8 8.4 Video frame packing type . 13 8.5 Packed video content interpretation 17 8.6 Sample aspect ratio indicator 17 iv Rec. ITU-T H.273 (12/2016) List of Tables Page Table 1 List of code point definitions 4 Table 2 Inter
25、pretation of colour primaries (ColourPrimaries) value . 5 Table 3 Interpretation of transfer characteristics (TransferCharacteristics) value . 6 Table 4 Interpretation of matrix coefficients (MatrixCoefficients) value 12 Table 5 Definition of VideoFramePackingType 13 Table 6 Definition of PackedCont
26、entInterpretationType . 17 Table 7 Meaning of sample aspect ratio indicator (SampleAspectRatio) 18 List of Figures Page Figure 1 Rearrangement and upconversion of checkerboard interleaving (VideoFramePackingType equal to 0) 14 Figure 2 Rearrangement and upconversion of column interleaving (VideoFram
27、ePackingType equal to 1 with QuincunxSamplingFlag equal to 0) 14 Figure 3 Rearrangement and upconversion of row interleaving (VideoFramePackingType equal to 2 with QuincunxSamplingFlag equal to 0) 15 Figure 4 Rearrangement and upconversion of side-by-side packing arrangement (VideoFramePackingType e
28、qual to 3 with QuincunxSamplingFlag equal to 0) 15 Figure 5 Rearrangement and upconversion of top-bottom packing arrangement (VideoFramePackingType equal to 4 with QuincunxSamplingFlag equal to 0) 16 Figure 6 Rearrangement and upconversion of side-by-side packing arrangement with quincunx sampling (
29、VideoFramePackingType equal to 3 with QuincunxSamplingFlag equal to 1) 16 Figure 7 Rearrangement of a temporal interleaving frame arrangement (VideoFramePackingType equal to 5) 17 Rec. ITU-T H.273 (12/2016) v Introduction In a number of specifications, there is a need to identify some characteristic
30、s of video (or still image) media content that are logically independent of the compression format. These characteristics may include, for example, aspects that relate to the sourcing or presentation or the role of the video (or still image) media component. These characteristics have typically been
31、 documented by fields that take an encoded value or item selected from an enumerated list, herein called code points. These code points are typically defined in the specification of compression formats to document these characteristics of the media. In past practice, the definition of these fields h
32、as been copied from standard to standard, sometimes with new values being added in later standards (and sometimes with later amendments specified to add new entries to existing standards). This past practice has raised a number of issues, including the following. 1) A lack of a formal way to avoid c
33、onflicting assignments being made in different standards. 2) Having additional values defined in later specifications that may be practically used with older compression formats, but without clear formal applicability of these new values to older standards. 3) Any update or correction of code point
34、semantics can incur significant effort to update all standards in which the code point is specified, instead of enabling a single central specification to apply across different referencing specifications. 4) The choice of reference for other specifications (such as container or delivery formats) no
35、t being obvious; wherein a formal reference to a compression format standard appears to favour that one format over others and also appears to preclude definitions defined in other compression format specifications. 5) Burdensome maintenance needs to ensure that a reference to material defined in a
36、compression format specification is maintained appropriately over different revisions of the referenced format specification, as the content of a compression format specification may change over time and is ordinarily not intended as a point of reference for defining such code points. This Specifica
37、tion provides a central definition of such code points for video and image applications to address these issues. This Specification can be used to provide universal descriptions to assist interpretation of video and image signals following decoding or to describe the properties of these signals befo
38、re they are encoded. Rec. ITU-T H.273 (12/2016) 1 Recommendation ITU-T H.273 Coding-independent code points for video signal type identification 1 Scope This Recommendation | International Standard defines various code points and fields that establish properties of a video (or still image) represent
39、ation and are independent of the compression encoding and bit rate. These properties may describe the appropriate interpretation of decoded data or may, similarly, describe the characteristics of such signal before the signal is compressed by an encoder that is suitable for compressing such an input
40、 signal. 2 Normative references The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provisions of this Recommendation | International Standard. At the time of publication, the editions indicated were valid. All Recommendation
41、s and Standards are subject to revision, and parties to agreements based on this Recommendation | International Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of c
42、urrently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently valid ITU-T Recommendations. 2.1 Identical Recommendations | International Standards None 2.2 Paired Recommendations | International Standards equivalent in technical content
43、 None 2.3 Additional references ISO 11664-1, Colorimetry Part 1: CIE standard colorimetric observers. 3 Definitions For the purposes of this Recommendation | International Standard, the following definitions apply. 3.1 chroma: Sample array or single sample representing one of the two colour differen
44、ce signals related to the primary colours, represented by the symbols Cb and Cr. NOTE The term chroma is used rather than the term chrominance in order to avoid the implication of the use of linear light transfer characteristics that is often associated with the term chrominance. 3.2 component: Arra
45、y or single sample from one of the three arrays (luma and two chroma) that compose a picture in 4:2:0, 4:2:2 or 4:4:4 colour format or the array or a single sample of the array that compose a picture in monochrome format. 3.3 luma: Sample array or single sample representing the monochrome signal rel
46、ated to the primary colours, represented by the symbol or subscript Y or L. NOTE The term luma is used rather than the term luminance in order to avoid the implication of the use of linear light transfer characteristics that is often associated with the term luminance. The symbol L is sometimes used
47、 instead of the symbol Y to avoid confusion with the symbol y as used for vertical location. 3.4 picture: An array of luma samples in monochrome format or an array of luma samples and two corresponding arrays of chroma samples in 4:2:0, 4:2:2 and 4:4:4 colour format. 3.5 reserved: Values of a partic
48、ular code point that are for future use by ITU-T | ISO/IEC and shall not be used in identifiers conforming to this version of this Specification, but which may be used in a manner yet to be specified in some future extensions of this Specification by ITU-T | ISO/IEC. 3.6 unspecified: Values of a par
49、ticular code point that have no specified meaning in this version of this Specification and will not have a specified meaning as an integral part of future versions of this Specification. 2 Rec. ITU-T H.273 (12/2016) 4 Abbreviations For the purposes of this Recommendation | International Standard, the following abbreviations apply. LSB Least Significant Bit MSB Most Significant Bit SAR Sample Aspect Ratio 5 Conventions NOTE The mathematical operators used in this Specification are similar to th
