本帖最后由 交响无际 于 2022-11-3 16:00 编辑
相关资料信息与粗浅理解
原以为音频文件,大致可以分为混音、母带两种响度级别,结果试了手头的几十个音视频文件,实际测下来,从-5LUFS,到-23LUFS都有,分布还挺均匀的,呵呵
实测下来,大概可以分成下面几类吧
1. 发烧碟,日韩音乐,电影原声,大概-6~-10LUFS的挺多的
2. 流行音乐,环境音乐,-10~16LUFS,
3. 古典,-16~-23LUFS
倒是还挺符合,Bob Katz就发明的K-system,给数字dBFS数字表指定出明确的标准的Headroom。
适合大动态HIFI,古典原声类音乐的K-20,留出20dBHeadroom
适合流行类音乐的K-14,留出了14dB的Headroom
ITU-R BS.1770-4标准,主要讲了讲响度计算的K-system
Algorithms to measure audio programme loudness and true-peak audio level
https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1770-4-201510-I!!PDF-E.pdf
Bob Katz这篇文献还挺好的,写了很多关于响度控制的发展过程,K-system和他的想法
An Integrated Approach to Metering, Monitoring, and Levelling Practices.pdf
by Bob Katz, Digital Domain, Inc.
https://www.aes.org/technical/documentDownloads.cfm?docID=65
EBU R128标准,好像是目前应用最广泛的吧?不过R128里面没写什么,Tech 3343内容非常丰富了
https://tech.ebu.ch/docs/r/r128.pdf
EBU R128,TECH 3343,GUIDELINES FOR PRODUCTION OF PROGRAMMES IN ACCORDANCE WITH EBU R 128
https://tech.ebu.ch/docs/tech/tech3343.pdf
ATSC监听声压级标准
ATSC A/85:2013, “Techniques for Establishing and Maintaining Audio Loudness for Digital Television”, approved 12 March 2013.
https://www.atsc.org/wp-content/uploads/2021/04/A85-2013.pdf
https://www.atsc.org/wp-content/uploads/2015/03/Techniques-for-establishing-and-maintaining-audio-loudness.pdf
Download A/85:2013 Corrigendum No. 1, “SPL”, approved 11 February 2021.
https://www.atsc.org/wp-content/uploads/2021/02/A85-2013-Corrigendum-1.pdf
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