Quote:
Originally Posted by benwaggoner
4:4:4 doubles memory buffer and bandwidth requirements, and increases bitrate some, and demonstrated gains have never been worth the extra cost.
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I would challenge the assertion that not using chroma subsampling would increase the bitrate somewhat for the same perceptual quality.
It would be much more efficient for a CODEC to determine what perceptual compressions to make instead of feeding an already chroma-subsampled source.
There are five things, I believe need to change in video processing:
1. More to a float32 code value standard
2. Abandon the difference between full and limited range (no clipping while float 0.0 to 1.0 is always the visible range)
3. No more chroma subsampling (but allow chroma subsampling for legacy sources)
4. No more interlaced sources (but allow interlaced for legacy sources)
5. Allow for multiple framerates in the same source (each frame will have an absolute time duration marker)
This will make life a lot simpler!