[Mp4-tech] H.264 motion vectors

[Karsten Suehring]

Luca,
in the luma and chroma sample interpolation the sample locations are
clipped to the border positions. This is logically the same like
repeating the samples outside the picture. See equation 8-184 for luma
samples and 8-206 to 8-213 for chroma samples (JVT-G050r1)
Best regards,
Karsten
Luca Del Vecchio wrote:
> Hi all,
> 
> I'm implementing an H.264 decoder and it seems that JM9.2 encoder may
> generate motion vectors referring to pixels outside the picture
> boundaries.
>>From my understanding of the code, in these cases the borderline pixels
> are repeated as necessary to get the complete reference. Is it correct?
> 
> I've tried to verify what observed before looking into the standard, (my
> copy is an old one: JVT-G050r1.doc), but I was not able to find
> something about that. Could you help me?
> 
> Best regards.
> 
> Luca Del Vecchio
> 
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