[asterisk-users] Codec Conversion

Michael Graves mgraves at mstvp.com
Fri Aug 6 07:43:21 CDT 2010


On Fri, 06 Aug 2010 07:40:44 -0500, Michael Graves wrote:

>On Fri, 6 Aug 2010 03:43:33 -0500 (CDT), Jeff Brower wrote:
>
><snip>
>
>>> MELPe is patent encumbered,
>>
>>Not if used for govt/defense purposes.  For commercial-only purposes, TI will waive royalty fees if their chip is used
>>in the product.  It would have been nice if Digium had considered the many advantages of using a DSP pioneer such as
>>TI before putting a Mindspeed chip on their TC400B card.
>>
>>> so there is still a place for LPC10 [...]
>>
>>I haven't seen an LPC10 implementation with MOS higher than 2.5.  Due to its age and expiration of patents, LPC10
>>might be a basis for a 2400 bps open source codec.  But enormous improvement would be needed to come close to MELPe
>>performance.
>>
>>-Jeff
>
>I wonder where David Rowe's newer CODEC2 fits into this discussion?
>(http://codec2.org/)
>
>Clearly it's not implemented anywhere yet, but it may prove yet useful
>in very bandwidth constrained applications. Oh yes. It's completely
>open source and should not be subject to patent issues.
>
>Michael

The more appropriate link should have been
http://www.rowetel.com/blog/?page_id=452

Michael
--
Michael Graves
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