Re: [AVT] File format for EVRC/SMV vocoder

[Harinath Garudadri <[e-mail]>]

At 04:46 AM 3/6/2003 -0800, Mark Baugher wrote:
>Adam
>   I have a question:  Why take a file format specification through the IETF?

Hi Mark,
did you mean AVT above? We were not sure if draft-garudadri-qcp-00.txt 
should go in to AVT or as an independent submission. I do not think this 
has been resolved yet.

If you meant IETF, our motivation was if a multimedia object (message?) was 
delivered over some mechanism other than RTP/UDP, (e.g. http, ftp, etc.) 
the receiver should be able to render the multimedia content appropriately. 
One example is if you create a voice attachment in Eudora email client, it 
is stored as a qcp file described in draft-garudadri-qcp-00.txt. If you 
send this email to someone who uses a different email client, that person 
could play the attachment in the QuickTime player, as QuickTime supports 
the above format.

Thanks,
hari.


>Best regards, Mark
>At 12:13 PM 3/5/2003 -0800, Adam Li wrote:
>>Hi folks,
>>
>>One issue just recently been raised about the file format for EVRC and
>>SMV data, which is specified the MIME registration for them. We very
>>much would like to hear your ideas and comments on this issue.
>>
>>As you may have known, we are working the IETF specification on the RTP
>>Payload Format for EVRC/SMV. It specifies how the EVRC/SMV payload is
>>carried in RTP sessions, and it also registered the MIME format for the
>>EVRC and SMV vocoders. The draft (draft-ietf-avt-evrc-smv) is currently
>>at the final editing stage at the IETF FRC Editor's queue.
>>
>>There has been a file format defined in the draft-ietf-avt-evrc-smv at
>>the MIME registration for EVRC/SMV. The file format specified there
>>hasn't been changed much since the first version of the draft in 2000.
>>
>>There is a new Internet Draft, draft-garudadri-qcp-00.txt, specifies a
>>different way of storage using the QCP file format, which has been used
>>for QCEPL-13K and EVRC by some applications.
>>
>>Currently, it has been proposed to remove the file format specification
>>in the draft-ietf-avt-evrc-smv, and to expand the draft-garudadri-qcp to
>>be the only formal specification for the file format for EVRC/SMV. On
>>the other hand, there are also suggestions to keep the file format at it
>>is specified in the draft-ietf-avt-evrc-smv.
>>
>>We would like to hear your suggestions, and hear from you how you think
>>would be the best way to proceed. Your comments are very much
>>appreciated.
>>
>>Adam
>>
>>
>>_______________________________________________
>>Audio/Video Transport Working Group
>>[e-mail]
>>https://www1.ietf.org/mailman/listinfo/avt
>
>_______________________________________________
>Audio/Video Transport Working Group
>[e-mail]
>https://www1.ietf.org/mailman/listinfo/avt

Dr. Hari Garudadri
phone : [phone]
mobile : [phone]
pager  : 858-653-0963 or [e-mail]