Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: ITU-R BT.2446-1 : 2021
• Năm ban hành / Publication date: 2001
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Methods for conversion of high dynamic range content to standard dynamic range content and vice-versa
• Phạm vi áp dụng / Scope of standard: Policy on Intellectual Property Right (IPR) 1 Introduction 2 Guidelines for conversion between SDR and HDR 2.1 Guidelines for SDR to HDR conversion 2.2 HDR to SDR conversion 2.3 Round-trip conversion 3 Feature-based comparison 4 Conversion Method A 4.1 HDR to SDR conversion 4.2 SDR to HDR conversion 5 Conversion Method B 5.1 SDR to HDR conversion 5.1.1 Linearise SDR input to RGB display light 5.1.2 Gamma compensation and scaling 5.1.3 Inverse tone mapping 5.1.4 Convert to RGB and apply the inverse EOTF 5.1.5 Simplification for HLG output 5.2 HDR to SDR conversion 5.2.1 Conversion to HDR linear RGB display light 5.2.2 Convert to Yu'v' 5.2.3 Tone Mapping 5.2.4 Colour volume reduction 5.2.5 Convert to RGB and apply the inverse BT.1886 EOTF 5.3 Round-tripping 6 Conversion Method C 6.1 HDR to SDR conversion 6.1.1 Conversion to linear display light signals 6.1.2 Crosstalk matrix 6.1.3 Conversion to Yxy 6.1.4 Tone mapping 6.1.5 Conversion to RGB linear signal 6.1.6 Inverse crosstalk matrix 6.1.7 Inverse SDR EOTF 6.1.8 Optional processing of chroma correction above HDR Reference White 6.2 SDR to HDR conversionAnnex 1 Evaluation of round-trip performanceA1 Round-trip performance of Method A A1.1 Database of HDR images A1.2 Stimuli A1.3 Experimental set-up A1.4 Participants A1.5 HDR comparison results A1.6 SDR comparison results A1.7 Conclusions