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Re: [codec] #5: Mention in requirements, FAX?

"Christian Hoene" <hoene@uni-tuebingen.de> Fri, 02 April 2010 14:21 UTC

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From: Christian Hoene <hoene@uni-tuebingen.de>
To: codec@ietf.org
References: <05542EC42316164383B5180707A489EE1D0AA5F54E@EMBX02-HQ.jnpr.net> <4BAF776D.20904@acm.org> <6e9223711003281100q7e1f7ac0pd548a2ab40e95ba4@mail.gmail.com> <4BAF9E7B.1070708@acm.org> <4BB58E31.2050809@coppice.org> <617DF0128820F9458AC39149A627EE6C01A2A21146@MBX.dialogic.com> <m2o6e9223711004020653jb5d773eejdea1ec98367c7ff0@mail.gmail.com> <4BB5F7B6.1080808@stpeter.im> <q2j6e9223711004020701u5151687dx7c5be128e3517560@mail.gmail.com> <0BD7AE28-298A-4586-9FB4-33925A8F8B8C@freeswitch.org>
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Date: Fri, 02 Apr 2010 16:21:18 +0200
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Subject: Re: [codec] #5: Mention in requirements, FAX?
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Hi guys,

just for the notes. Testing Fax (http://en.wikipedia.org/wiki/Fax#History) is definitely out of scope?

Christian

---------------------------------------------------------------
Dr.-Ing. Christian Hoene
Interactive Communication Systems (ICS), University of Tübingen 
Sand 13, 72076 Tübingen, Germany, Phone +49 7071 2970532 
http://www.net.uni-tuebingen.de/


>-----Original Message-----
>From: codec-bounces@ietf.org [mailto:codec-bounces@ietf.org] On Behalf Of Brian West
>Sent: Friday, April 02, 2010 4:10 PM
>To: stephen botzko
>Cc: codec@ietf.org
>Subject: Re: [codec] #5: Mention DTMF in requirements
>
>But Codecs themselves do not detect DTMF.  Thats the job of the DTMF detector.  NOT the codec.  In all
>my work with codecs I have not once seen one that knows anything about DTMF.  And if the codec is too
>lossy inband is out of the question.
>
>/b
>
>On Apr 2, 2010, at 9:01 AM, stephen botzko wrote:
>
>> I heard no decision as to DTMF tone encoding.
>>
>> As far as I am concerned, the question of whether the codec MUST encode DTMF tones accurately enough
>to be detected at the decoder output (or SHOULD or non-requirement) is still open.
>>
>> That question clearly is in-scope, and has nothing to do with signaling.
>>
>> Stephen Botzko
>
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