Re: YUV format

tterribe wrote:
>>For example, 16 bits -> 4 bits (4:1) reduces 65536 values to 16.
>>that's 1/4000th the resolution, not 1/4.
> 
> 
> That's probably the stupidest thing I've ever heard you say. "bits" do not 
> correspond to "resolution" like that. Reducing resolution by 1/4 already 
> reduces four 8-bit values to one, a reduction of 1:16.8mln by your accounting, 
> though clearly the amount of "information" being thrown away is not that 
> great. Assuming a Haar wavelet transform, a 1:4 resolution reduction is 
> exactly equivalent to throwing away the lowest level of the coefficient tree. 
> I believe it is commonly accepted that reducing the resolution of images 
> before wavelet compression makes no sense.

In this case the incoming video material already has quarter resolution 
U and V components, so scaling them up to full resolution makes even 
less sense.

Holger

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