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tav: grain synthesis on the spec

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minjaesong
2025-10-08 23:47:54 +09:00
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terranmon.txt
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@@ -1069,6 +1069,13 @@ This perceptual approach allocates more bits to visually important low-frequency
details while aggressively quantising high-frequency noise, resulting in superior
visual quality at equivalent bitrates.
#### Grain Synthesis
The decoder must synthesise a film grain on non-LL subbands at the amplitude half of the quantisation level.
The encoder may synthesise the exact same grain in sign-reversed on encoding (but not recommended for practical reasons).
The base noise function must be triangular noise in range [-1.0, 1.0].
## Colour Space
TAV supports two colour spaces: