[x264-devel] Re: x264 features

[Son Minh Tran]

Dear Loren Merritt,
Thank you very much for your detailed answer. With that I could get a 
good start for my survey.
Hopefully I can count on your help later on.
Thank you once again
With best regards

Loren Merritt a écrit :
> On Wed, 12 Apr 2006, Son Minh Tran wrote:
>
>> 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.
>
> Here are the bitstream-level features of the H.264 standard that have 
> been implemented in x264. This list does not include encoder-side 
> features that aren't covered by the standard.
> For example, Hadamard is not a feature of AVC, and as such is not on 
> this list. If you want to know more about non-standardized techniques 
> used in x264, the question to ask is not "what features are 
> supported", but "please tell me everything that x264 does", and the 
> answer is "read the sourcecode".
>
>   implemented:
> cabac, cavlc
> quarterpel motion
> deblocking filter
> I,P,B,Bref frames
> macroblock partitions: I16x16,I8x8,I4x4,
>     P16x16,P16x8,P8x16,P8x8,P8x4,P4x8,P4x4,Pskip,
>     B16x16,B16x8,B8x16,B8x8,Bskip,Bdirect
> implicit weighted prediction (in B-frames)
> spatial and temporal direct mvs
> multiple reference frames
> reference list reordering
> 4x4 and 8x8 transform
> custom quantizer matrices
> lossless
> slices
> YUV 4:2:0 8bit
>
>   not implemented:
> SI,SP frames
> macroblock partitions: B8x4,B4x8,B4x4
> explicit weighted prediction (in P-frames)
> constrained intra prediction
> adaptive reference marking
> flexible macroblock order
> arbitrary slice order
> data partitions
> redundancy
> interlacing
> alternate colorspaces and depths
> most of the SEI messages
>
>  --Loren Merritt
>

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