Dolby Vision notes
MEL is minimal enhancement layer
- Means the video info is only in the base layer (10-bit 4:2:0) and the MEL only has metadata.
- Pros: Faster processing time [1]
FEL is full enhancement layer
- where the FEL layer has the extra picture information bringing the final output to 12-bit.
- the (full) enhancement layer is the result of comparing the final compressed HDR10 encode to the DV source master, so it does its best to replicate what it finds in there, be it differences in grading (as with the aforementioned black levels, or that the DV layer can contain >1000 nit information if the HDR10 layer has been capped at 1000 nits) or rescuing terribad compression.
- Pros: Better video quality [2]
