标准动态范围和高动态范围转换方法研究与测试

Study and Test on Conversion Methods Between SDR and HDR

在高清SDR向4K HDR过渡阶段,涉及多种复杂的SDR和HDR转换场景,包括SDR到HDR转换、HDR到SDR转换、SDR-HDR-SDR往返转换等,不同厂家的转换设备在转换效果上参差不齐,不利于超高清视频产业高质量发展。本文在跟踪研究国内外SDR和HDR转换技术发展的基础上,结合应用现状,重点分析了场景参考(SR,SceneReferred)映射和显示参考(DR,Display Referred)映射两类SDR和HDR转换方法和转换流程,测试评估了不同转换方法的转换效果,给出了不同应用场景下转换方法的选择建议,为SDR和HDR转换应用提供技术参考。

During the transition phase from HD SDR to 4K HDR, there are multiple complex SDR and HDR conversion scenarios, including SDR to HDR conversion, HDR to SDR conversion, SDR-HDR-SDR round-trip conversion, etc. Conversion effects of conversion equipment from different manufacturers are uneven, which is not conducive to high-quality development of ultra-high-definition video industry. On the basis of tracking and studying the development of SDR and HDR conversion technologies at home and abroad, and combined with application status, this paper focuses on the analysis of two types of SDR and HDR conversion methods and procedure, including scene-referred mapping and display-referred mapping, tests and evaluated the effects of different methods, and gives suggestions on selection of conversion methods in different application scenarios, which provide technical references for the application of SDR and HDR conversions.