Standard No.:	GB/T 46269.1-2025
English Name:	High dynamic range (HDR) video technology—Part 1: Metadata and processing
Chinese Name:	高动态范围（HDR）视频技术 第1部分: 元数据及适配
Chinese Classification:	L71    Code, character set and character recognition
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2025-8-29
Implemented on:	2026-3-1
Status:	to be valid
Target Language:	English
File Format:	PDF
Word Count:	32500 words
Translation Price(USD):	975.0
Delivery:	via email in 1~10 business day

GB/T 46269.1-2025 High dynamic range (HDR) video technology—Part 1: Metadata and processing English, Anglais, Englisch, Inglés, えいご This is a draft translation for reference among interesting stakeholders. The finalized translation (passing thorugh draft translation, self-check, revision and varification) will be delivered upon being ordered. ICS 35.040 CCS L 71 People's Republic of China National Standard GB/T 46269.1-2025 High dynamic range (HDR) video technology - Part 1: Metadata and processing Issued on 2025-08-29 Implemented on 2026-03-01 Issued by State Administration for Market Regulation, Standardization Administration of China Contents 1 Scope 2 Normative References 3 Terms and Definitions 4 Abbreviations 5 Symbols and Operations 6 End-to-End System Framework 7 Metadata 8 HDR Display Adaptation 9 SDR Display Adaptation Appendix A (Informative) Dynamic Metadata Extraction Methods Appendix B (Informative) HLG Display Adaptation References 1 Scope This document specifies the end-to-end system framework, metadata definitions, and terminal display adaptation process for high dynamic range (HDR) video technology. This document applies to HDR video signal processing in broadcasting, network audiovisual, video surveillance, real-time communication, and digital storage media, including acquisition, production, broadcasting, distribution, reception, and display. 2 Normative References The following documents contain provisions which, through reference in this text, constitute essential provisions of this document. For dated references, only the edition cited applies; for undated references, the latest edition (including amendments) applies. ISO/CIE 11664-1 Colorimetry - Part 1: CIE standard colorimetric observers 3 Terms and Definitions The following terms and definitions apply to this document. 3.1 Metadata Data describing key information and characteristics required during video or image processing. 3.2 Static metadata Metadata associated with an image sequence and remaining unchanged within the sequence. 3.3 Dynamic metadata Metadata associated with each frame and varying with different images. 3.4 Processing The process of mapping one set of colors to another to achieve stable display effects on terminals with different display capabilities. 4 Abbreviations The following abbreviations apply to this document: EOTF: Electro-Optical Transfer Function HDR: High Dynamic Range HLG: Hybrid Log-Gamma MSB: Most Significant Bit OETF: Optical-Electro Transfer Function PQ: Perceptual Quantizer SDR: Standard Dynamic Range 5 Symbols and Operations 5.1 General Requirements Mathematical operators and precedence in this document follow the C language, with specific definitions for integer division and arithmetic shift operations. Unless otherwise specified, numbering and counting start from 0. 5.2 Arithmetic Operators Arithmetic operators are defined in Table 1. 5.3 Logical Operators Logical operators are defined in Table 2.