Re: YUV format

Dustin Stuart wrote:
> YUV12 saves the chrominance planes at 1/4 the resolution of the luminance
> plane right? because the eye is less sensitive to colour than shade.
> 
> Instead of reducing the colour resolution, why not simply quantize the
> colour information more heavily. This way the encoder could be more flexible
> about how much colour information is kept (hopefully reducing blocky
> artifacts in areas where the colour changes abruptly).

This is done anyway. Right now the U and V component images get 1/8 and 
the V component images gets 1/8 of the bit budget.


> Also, there would be no need for extra resizing operations to convert RGB ->
> YUV.

subsampled U and V components are just pretty common in many video file 
formats, so you would have to resize those components up...

So maybe it's a fine idea to support half-resolution U and V component 
images...

Holger

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