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

From: [email-masked]
Date: Thu, 23 Aug 2001 08:46:11 +0200

logged for replacement in next version.

Thanks,

Philippe Gentric
Software architect
Philips Digital Networks - MP4Net
51 rue Carnot B.P. 301
92156 Suresnes FRANCE
tel: +33(0)147283740
fax: +33(0)147283725
[email-masked]
http://www.mpeg-4.philips.com

"Lim, Young-Kwon" <[email-masked]>@ietf.org on 23-08-2001 06:24:04

Please respond to "Lim, Young-Kwon" <[email-masked]>

Sent by:  [email-masked]

To:     Philippe Gentric/LIM/CE/PHILIPS@EMEA1
cc:     <[email-masked]>
        <[email-masked]>
Subject:  Re: [AVT] Re: Question about "PayloadSize" field in MPEG-4 RTP payload format
Classification:

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.

_______________________________________________
Audio/Video Transport Working Group
[email-masked]
http://www1.ietf.org/mailman/listinfo/avt

_______________________________________________
Audio/Video Transport Working Group
[email-masked]
http://www1.ietf.org/mailman/listinfo/avt