Glenn Parsons (gparsons@nortelnetworks.com)
Thu, 16 Nov 2000 12:21:02 -0600
FYI,
In the VPIM WG, for IVM we are interested in the MS-GSM codec. It is
different enough from GSM 6.10 for Microsoft to hold a patent.
It is some sort of patent release statement (as well as an accurate
definition) from Microsoft on MG-GSM and WAVE (audio/wav) that we have been
waiting for.
Note that we have been waiting for a while and at the last meeting the
consensus was that G.711 (as in audio/basic) would be the alternative should
we decide that we have waited long enough.
Cheers,
Glenn.
> ----------
> From: James P. Salsman
> Sent: Tuesday, November 14, 2000 3:03 pm
> To: vpim@lists.neystadt.org
> Cc: ietf@ietf.org
> Subject: [VPIM] GSM 6.10 is public domain; audio/wav needs registered
>
> Contrary to what people at VPIM meetings, lists, and on web pages
> have suggested, nobody owns any IPR on the GSM 06.10 vocodec format,
> or on any routines for encoding or decoding it. It was developed
> from published code by people who took care to publish it before it
> could be monopolized.
>
> Philips owns the rights to a related but different form of LPC,
> from U.S. patent 5,943,646, which was applied for more than four
> years after the publication of GSM 06.10 by ETSI. That patent is
> most likely what is confusing people about the status.
>
> Also, http://www.ema.org/vpimdir/specs/draft-ema-vpim-wav-00.txt
> -- the pending-in-limbo audio/wav IANA registration -- has an error:
> it reads "audio/vnd.wav"; that should be "audio/vnd.wave", which,
> by the way, hasn't been registered with IANA either. I agree with
> Keith Moore that they should be registered as identical, and I hope
> that they be registered in the same document to make that clearer.
> The definitive reference for these formats seems to be kept in
> Microsoft's Support Knowledge Base Article ID Q120253:
> http://support.microsoft.com/support/kb/articles/Q120/2/53.asp
>
> Cheers,
> James
>
>
>
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