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RE: [OpenDivX] dct



Thanks. It sounds strange, since the DCT is thoroughtly tested, and cross
tested with standard MPEG-4 bitstreams. I will double check later. Are you
sure that those are the coefficients for the same Macroblock?

c0redumb

> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of prakash
> Sent: Monday, May 21, 2001 6:43 PM
> To: [email protected]
> Subject: [OpenDivX] dct
>
>
> Hello all,
> I have tried to compare the fdct values which come  out of the dct routine
> under linux for mpeg2(TM-5) encoder and the ones from encore. The
> difference between the DC values is large for the same YUV file used.
>
> Eg:
> 	 200  -40  -23  -13  -16  0 (are the first few values obtained
> 					from TM-5 after dct)
> 	1227  -60    0    1    0  0 (are the values from encore)
>
> Since both the fdct implementation are the same, I am bit lost at this
> huge variation in the dc values?
> The the YUV files were generated from flower garden video sequence.
>
> with regards
> Prakash
>
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