From: Thomas
Stockhammer [mailto:stockhammer at nomor.de]
Sent: Thursday, November 29, 2007
5:40 PM
To: Even, Roni; Rod Hill;
avt at ietf.org
Subject: Re: [AVT] RFC 3984
Packetization 0 question
Roni,
FUs do have other use cases than the one you mention, for example if you
transmit pre-encoded content and you have to adapt the packet size.
In addition if you combine with Application-Layer FEC as for example the case
in 3GPP MBMS, FUs adapted to radio packet payload sizes can improve performance
significantly when compared to no adaptation or even when compared to the use
of adapted NAL unit sizes (i.e. slices).
Best regards
Thomas
Even, Roni wrote on 29.11.2007 16:33 Uhr :
Rod,
Using FUs make sense if you reach a limit like maximum number of slices.
Otherwise you should try to build your NAL units so that they are
smaller than the MTU size.
Roni Even
> -----Original Message-----
> From: Rod Hill [mailto:RHill at trinityconvergence.com]
> Sent: Thursday, November 29, 2007 5:17 PM
> To: avt at ietf.org
> Subject: RE: [AVT] RFC 3984 Packetization 0 question
>
>
>
> RFC 3984 states that
>
> When the value of packetization-mode is equal
>
to
0 or packetization-mode is not present, the
>
single
NAL mode, as defined in section 6.2 of
>
RFC
3984, MUST be used.
>
> But how does 6.2 handle Single NALs > Max MTU size. Surely use of one
of
> the FU schemes is the only reliable way to send such a NAL, or are
we
> supposed to rely on IP fragmentation/reconstitution to get the NAL
> across a network?
>
> Best Regards
>
> Rod Hill
> Trinity Convergence
>
> _______________________________________________
> Audio/Video Transport Working Group
> avt at ietf.org
> https://www1.ietf.org/mailman/listinfo/avt
_______________________________________________
Audio/Video Transport Working Group
avt at ietf.org
https://www1.ietf.org/mailman/listinfo/avt
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