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ZyXEL modem FAQ List v4.2, Nov 20 1995, Part 4 of 5 [Info / IDSN]
Section - I.5 ZyXEL's CELP compression mode for voice

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Top Document: ZyXEL modem FAQ List v4.2, Nov 20 1995, Part 4 of 5 [Info / IDSN]
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CELP compression is currently available only on Plus model modems.  The 
implementation of CELP in the ZyXEL plus model modems is proprietary.  As
such, ZyXEL has not published any information regarding the manual decoding/
encoding using this method.  ZyXEL also will not confirm nor deny any 
sources of information that will will further elucidate the CELP decoding/
encoding algorithms.

A listing of all the US Federal Standard 1016 sources is available by
sending e-mail to Robert Wong (rwong@direct.ca).  

The numerous pages of USFS descriptions do not help in decoding ZyXEL's CELP.
They may help to understand what ZyXEL's CELP C code basically does. The 
USFS 1016 descriptions are nice to learn about what CELP *could* do ;-)

For further understanding of CELP, it needs a real mathematician and deeper
knowledge of voice processing theories.)


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Top Document: ZyXEL modem FAQ List v4.2, Nov 20 1995, Part 4 of 5 [Info / IDSN]
Previous Document: I.4 Known mailing lists dealing with ZyXEL modems
Next Document: I.6 What is V.34, and what speeds are supported?

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Send corrections/additions to the FAQ Maintainer:
rwong@direct.ca (Robert Wong Jr.)





Last Update March 27 2014 @ 02:11 PM