Charles Eliot (charle@Exchange.Microsoft.com)
Tue, 12 Dec 2000 07:59:20 -0800
Turns out - after much sighing and gnashing of teeth - that there is no
patent issue. MS-GSM implements the GSM codec, and the proposed RFC
describes how to format a GSM bitstream in such a way that the MS-GSM
codec can read it.
The balance between file size and desktop ubiquity is always going to be
tricky. I'm leaning these days towards G.711, but as Eric Burger pointed
out there is still a lot of slow-link dialup going on out there.
-----Original Message-----
From: Anthony Baxter [mailto:anthony@interlink.com.au]
Sent: Tuesday, December 12, 2000 1:50 AM
To: Brian Cruickshank
Cc: Glenn Parsons; 'IETF VPIM List'
Subject: Re: [VPIM] RE: 3GPP-T-WG3 codecs
>>> "Brian Cruickshank" wrote
> Glenn, I understand that MS-GSM is currently viewed as the codec of
choice
> for VPIM but has this decision been finalized yet? I think a good
case can
> be made for adopting the 'audio / basic' G.711 codec as a baseline
VPIM
> codec.
I also have some concerns about the choice of MS-GSM as the default
codec.
G.711 is also supported on a far wider range of systems and devices. The
only system I can see that supports MS-GSM is Windows. G.711 is
supported
out of the box on pretty much everything I can find. While the larger
file size is a nuisance, we're not talking about real-time
communications
here - it's voicemail, and is batched.
Aside from the voice quality side, there's also the resource issue -
converting to MS-GSM is relatively expensive, and if the systems are
just going to convert it back again at the other end, this seems
somewhat foolish.
Has the patent/IP issue with GSM been resolved yet? Is MS-GSM a
published standard?
Anthony
This archive was generated by hypermail 2.0b3 on Tue Dec 12 2000 - 19:06:37 IST