Hi,

Saeed Salehi schrieb:
> Dear experts,
>  
> I would like to compare the PSNR performance of Dirac codec with that of 
> the H.264 (using *IBBBIBBBI...* frame format i.e. GOP = 4). I am just 
> wondering what does the parameter *wlt_depth* mean exactly and what is 
> its relation to the GOP size? is it the number of wavelet decompositions 
> (i.e. GOP = 2 ^ wlt_depth ?) or it is simply the length of the group of 
> pictures (GOP = wlt_depth ?). In other words, shall i use *wlt_depth = 
> 2* or *wlt_depth = 4* for a fair comparison?

For a fair comparison of different codecs you shouldn't use PSNR. See here:

http://hirntier.blogspot.com/2010/01/video-quality-characterization.html

Burkhard

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