[Mp4-tech] [video][H.264] Regarding disable_deblocking_filter_idc

[Smitha Joseph]

Hi,
Thanks for the replies. I had an additional doubt. 
In the JVT code, the encoder configuration file has aparameter which
sets the value disable_deblocking_filter_idc  to 1 or 0. But the
standard specifies that disable_deblocking_filter_idc can have a value
2 also, when does encoder set this parameter value to 2.
Thanks,
Smitha Joseph
On Apr 7, 2024 12:31 PM, Adarsh Golikeri <golikeri gmail.com> wrote:
> Hi,
> 
> In the encoder congiguration file, there are parameters for "Loop
> filter" which allow for enabling/disabling the deblocking filter. If
> the filter is enabled, then the boundary strength is chosen according
> to :
> 
> boundary is an intra-intra / inter-intra MB boundary : strength = 4 (strongest)
> boundary is an intra-inter / inter-inter non-MB boundary (i.e within
> an MB) : strength = 3
> boundary is an inter-inter boundary, with coded coefficients : strength = 2
> boundary between MBs using different reference pictures / different
> number of reference pictures / have MV values differing by more than
> one luma sample : strength = 1
> otherwise : strength = 0.
> 
> Hope that helped,
> 
> Bye !
> 
> Adarsh
> 
> On Apr 6, 2024 3:02 AM, Smitha Joseph <smithajo gmail.com> wrote:
> > Hi,
> >
> > The H.264 standard specifies the parameter
> > disable_deblocking_filter_idc in the slice header which specifies
> > whether the deblocking filter is disabled for the
> > macroblock/macroblock edges in that slice. The details of how the
> > parameter disables filtering at the decoder side for the different
> > values is clear from the standard. My doubt is how does the encoder
> > decide whether to enable or disable filtering for each
> > macroblock/macroblock edges in a slice?
> >
> > Thanks,
> > Smitha Joseph
> > _______________________________________________
> > NOTE: Please use clear subject lines for your posts. Include [audio, [video], [systems], [general] or another apppropriate identifier to indicate the type of question you have.
> >
> > Note: Conduct on the mailing list is subject to the Antitrust guidelines found at http://www.mpegif.org/public/documents/vault/mp-out-30042-Antitrust.php
> >
>