[x264-devel] x264 features

[Son Minh Tran]

Dear Loren Merritt,
Thank you for clarification.
My question on Hamadard is just a part of my problem, would you please 
give me more in detail the features of AVC that are supported by x264 ? 
 From the feature list of x264 and the way of setting parameters (also 
the different naming like hadamard) it is very difficult to figure out.
Thank you for your helps
Regards


Loren Merritt a écrit :
> On Tue, 11 Apr 2006, Son Minh Tran wrote:
>
>> Dear All,
>> Would you please let me know if the hamadard transform is 
>> implemented  in x264, or only the DCT?
>> Thank you
>> Regards
>
> Yes, it is implemented. x264 usually calls it "SATD" for "sum of 
> absolute transformed differences".
>
> But "or only the DCT" is misleading. Hadamard is not part of the H.264 
> standard, and is not an alternative to DCT. It is an encoder-side 
> technique to improve speed and/or quality, and is also used in some 
> mpeg-1/2/4 encoders.
> (Well, hadamard is also part of the h264 intra 16x16 dc transform, but 
> asking whether that's implemented is meaningless; it's required.)
>
> --Loren Merritt
>

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