Re: [AVT] Re: Question about "PayloadSize" field in MPEG-4 RTP payload format

Dear Phillipe,

> 
> I propose to change (3.4.1 Fields of MSLH ):
> into
> ****************************************
> 
> 3.4.1 Fields of MSLH
> 
>    PayloadSize: Indicates the size in bytes of the associated SL Packet
>    Payload, which can be found in the SLPPSection of the RTP packet.
>    The length in bits of this field is signaled by the SizeLength
>    parameter (see section 4.1).
> 
>    There is an exception to that. When the RTP packet contains a single  SL packet
> (although the mode is "MultipleSL" this can happen for Access Units of size
> comparable or greater than the MTU) the PayloadSize field SHALL contain the size of the entire
>    corresponding Access Unit. There are two reasons, firstly the size of the
>    fragment is not needed when there is only one fragment, secondly
>    this is useful in order to detect that a full Access Unit has been
>    received after the loss of a packet carrying M bit set to 1.
> 
> *******************************************
> 

How about this?

There is an exception to that. In the case that the RTP packet containes only one SL packet in "Multiple SL mode", the PayloadSize field SHALL contain the size of the entire corresponding Access Unit. This would happen, when the size of AU is comparable or greather than MTU. There are two reasons, firstly the size of the fragment is not needed when there is only one fragment, secondly this is useful in order to detect that a full Access Unit has been  received after the loss of a packet carrying M bit set to 1.

Sincerely,
Young.

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