Comment by cornstalks

3 days ago

You can read the actual HLG spec here: https://www.arib.or.jp/english/html/overview/doc/2-STD-B67v2...

The math uses real numbers but table 2-4 ("Digital representation") discusses how the signal is quantized to/from analog and digital. The signal is quantized to integers.

This same quantization process is done for sRGB, BT.709, BT.2020, etc. so it's not unique to HLG. It's just how digital images/video are stored.

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