Media Types in 3GPP Timed text draft (was: RE: [AVT] RTP andMediaTypes)

Dave Singer singer at
Tue Sep 7 15:50:15 CEST 2004

At 3:46 PM +0200 9/7/04, Magnus Westerlund wrote:
>Dave Singer wrote:
>>But text/html is not only rendering text, it is expressed in text. 
>>3GPP renders text, but it is expressed in binary.
>Not really. In my view timed text is expressed in binary framing and 
>UTF-8 or UTF-16 encoded text (which might be argued is binary). But 
>the framing issues, are true for basically all RTP payload formats. 
>You need to understand the RTP payload format to do anything.

agreed.  if you don't understand the payload-specific headers, it is 
no help to know that some of what you are looking at is expressed in 
textual format.

>Magnus Westerlund
>Multimedia Technologies, Ericsson Research EAB/TVA/A
>Ericsson AB                | Phone +46 8 4048287
>Torshamsgatan 23           | Fax   +46 8 7575550
>S-164 80 Stockholm, Sweden | mailto: magnus.westerlund at

David Singer
Apple Computer/QuickTime

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