Re: [mpeg2-dev] Error concealment of libmpeg2

[Lu X. <lxi...@so...>]

Hi Michel,
   Thank you for your answer. Yes, I am interested in the error
concealment stuff. Now I am working on mpeg2 video over IP network. I use
libmpeg2 package as the decoder. I concern the video quality degradation
after transmission across the network.So actually I will implement some
error concealment algorithms.I think the first step is how libmpeg2
detects errors. 

 Xiaoxiang Lu
 ICS department of UC,Irvine
 phone:(949)8246374

On Fri, 5 Oct 2001, Michel LESPINASSE wrote:

> On Fri, Oct 05, 2001 at 03:03:43PM -0700, Lu Xiaoxiang wrote:
> >    What have you implemented in the libmpeg2 concerning error
> > concealment? Could you please suggest me something about that? Thanks.
> 
> This is currently unimplemented. Actually right now the error handlig
> is so bad that we can crash on bad streams sometimes.
> 
> When we solve the crash problems error concealment can probably be
> implemented outside of libmpeg2 - like you would get a list of slices
> that were not properly decoded, and you'd have to do whatever you want
> with these slices. Maybe we could try to also extract more information
> like motion vectors from the slices above and below to help the error
> concealment algorithms. But as I said we have nothing of that yet.
> 
> Are you interested in error concealment yourself ?
> 
> -- 
> Michel "Walken" LESPINASSE
> Of course I think I'm right. If I thought I was wrong, I'd change my mind.
>