[x264-devel] Regarding Intra macroblock in P Slice

mahesh k maheswarreddy.k at gmail.com
Tue Nov 6 04:29:24 CET 2007


Does this mean that if the flag is set then we should not have a Inter
predicted macroblock in a I slice. This is my poor understanding from the
standard. Am i correct?

On 11/5/07, Eric Viscito <eric at ev-consulting.com> wrote:
>
>
> Cut and paste from the specification:
>
> "constrained_intra_pred_flag equal to 0 specifies that intra prediction
> allows usage of residual data and decoded samples of neighbouring
> macroblocks coded using Inter macroblock prediction modes for the
> prediction of macroblocks coded using Intra macroblock prediction modes.
> constrained_intra_pred_flag equal to 1 specifies constrained intra
> prediction, in which case prediction of macroblocks coded using Intra
> macroblock prediction modes only uses residual data and decoded samples
> from I or SI macroblock types."
>
>
> On Mon, November 5, 2007 7:55 am, mahesh k wrote:
> > Thanks for your reply,
> >
> > Can you please tell me what for constrained intra prediction flag is
> used.
> >
> > with best regards,
> > Mahesh.
> >
> >
> > On 11/5/07, Yongmin Tan <angelwings at sjtu.edu.cn> wrote:
> >>
> >>  I think there is no such syntax element . You can just neglect the
> >> intra
> >> analysis part in the mode decision for P slice.
> >>
> >>
> >>
> >> *发件人:* x264-devel-bounces at videolan.org [mailto:
> >> x264-devel-bounces at videolan.org] *代表 *mahesh k
> >> *发送时间:* 2007年11月5日 15:34
> >> *收件人:* Mailing list for x264 developers
> >> *主题:* [x264-devel] Regarding Intra macroblock in P Slice
> >>
> >>
> >>
> >> Hi all,
> >>
> >>
> >>
> >> Is there any syntax element(flag) which indicates the absence of I
> >> macroblocks in P slice in any case. My purpose is not to have any
> >> Intramacroblock in P slice. Please help me.
> >>
> >>
> >>
> >> Regards,
> >>
> >> Mahesh.
> >>
> >> _______________________________________________
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> >> x264-devel at videolan.org
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> >>
> >>
> > _______________________________________________
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> >
>
>
>
>
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