Re: [MMUSIC] draft-gellens-mmusic-negotiating-human-language-00.txt - asymmetric preferences

[Randall Gellens <[e-mail]>]

Re: [MMUSIC] draft-gellens-mmusic-negotiating-human-langua

Hi Gunnar,

Thanks for the quick review and comments.

At 12:08 PM +0200 7/8/13, Gunnar Hellstrom wrote:

In 7.1, it says:

"In an offer, the 'humintlang-send' values constitute a list in
   preference order (first is most preferred) of the languages the
   offerer wishes to send, and the 'humintlang-recv' values constitute a
   list in preference order of the languages the offerer wishes to
   receive.  Both SHOULD have the same values in the same order, because
   otherwise it is harder to match desired resources."

A typical example of a user who do not want to specify the same value in both directions is a hard-of-hearing user who prefers to speak English but might accept to type English text on the transmission side,  but prefers to read English text and do not have sufficient hearing to at all handle hearing spoken English on the receiving side.

This is very similar to the use case included of a user who can hear English but not speak; an audio and text stream are set up, both using English.  The point of negotiating language is to get the call to a callee who can communicate with the caller (e.g., a PSAP and call taker who understand at least one language in common with the caller).  The point is not to fully specify exactly how the media will be used; there is no need to do so and it won't help get the call to the right callee, but will make things much more complex.

It is simpler and more robust to handle cases such as you describe and the one in the document now by negotiating the needed media as two-way streams.

-- 

Randall Gellens
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