There's lots of helpful information and data about the MELP vocoder and MELPe codec at:
Http://www.melpe.com
Incluing implementations, software, hardware and solutions
Reply by GoodMan●November 20, 20182018-11-20
There's lots of helpful information and data about the MELP vocoder and MELPe codec at:
Http://www.melp.org
Incluing implementations, software, hardware and solutions
Reply by MELPe●February 3, 20072007-02-03
From Compandent's web site:
http://www.MELPe.comhttp://www.compandent.com/products_melpe.htmhttp://www.Compandent.com/MELPePackageFactSheet.pdfhttp://www.compandent.com/products_flexi232.htm
MELPe - Enhanced Mixed-Excitation Linear Predictive Vocoder
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
MELPe- Enhanced Mixed-Excitation Linear Predictive (MELP) vocoder, known
as military standard MIL-STD-3005 and NATO STANAG 4591, is a triple-rate
low rate coder that operates at 2400, 1200 and 600 bps. The Compandent's
MELPe vocoder suite (a.k.a MELPe++ or MELPe-Plus-Plus) includes also
compressed bit-stream transcoding between the rates as well as optional
Noise Pre-Processor. MELPe's performance is demonstrated in Tables 1-3
below, and c54xx & c55xx MELPe Package Fact Sheet & c64xx MELPe Package
Fact Sheet are also available. See also Compandent MELPe FAQ. Compandent
offers low-cost Data-Terminal Equipment (DTE) such as FLEXI-232 for
interfacing vocoders such as MELPe with external devices such as modems.
Compandent Inc. has participated in the research, development and
implementation of the Enhanced Mixed-Excitation Linear Predictive
(MELPe) vocoder, and utilized its savvy expertise in speech coding and
DSP to take the MELPe to the next level, the Compandent MELPe suite. In
addition, Compandent provides various software and hardware related to
the MELPe vocoder.
Compandent's MELPe is better than the standard reference!
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Compandent's MELPe (MELPe-Plus-Plus) produces better quality than the
standard reference! Compandent has been supporting and improving the
MELPe real-time implementation, and has found and fixed numerous bugs in
it, many of these bugs could not be discovered by simply processing the
standard Test Vectors, rather than by comprehensive process of analyzing
and optimizing the code and testing it under wide variety of scenarios
and conditions conducted by Compandent's speech coding and DSP experts.
We can show you examples where the standard reference produces hoarse
speech or annoying clicks while Compandent's MELPe (MELPe++) produces
much better sounding and cleaner speech. Therefore Compandent's MELPe
(MELPe++) is in fact better than the standard reference! Compandent has
also greatly improved and optimized the code. Compandent has ported
MELPe to various DSPs by Texas Instruments such as TMS320c54xx,
TMS320c55xx, TMS320c64xx, and OMAP.
Compandent also provides MELPe related DSP software & hardware in
various COTS form factors and platforms, including multi-channel &
multi-thread POSIX (Portable Operating System Interface) compliant
software running on various platforms such as Unix, Linux, Windows PC,
MacOS, etc.. Such implementations are suitable for applications such as
PDA, pocket PC, laptop, cell-phones, VoIP, satellite communications,
secure voice, secure radio, Software Defined Radios (SDR) or
software-programmable radio, STE (Secure Terminal Equipment), JTRS and
MIDS terminals.
spweda@gmail.com wrote:
> Hello, I sent a request to get MELPe through s5066.nc3a.nato.int two
> months ago, but I did not receive a reply. Is there another way to the
> MELPe with 600 bps. Could someone in the USA share the updated MELPe
> code with me? Please sent the code to
>
> kathyz@torreypinestechnologies.com
>
> or mail the code to
>
> Kathy Zhang
>
> Torraypines Technologies Inc.
>
> 12396 World Trade Drive
> Suite 117 San Diego
> California 92128-3788
> USA
>
Reply by fizteh89●February 2, 20072007-02-02
>MELPe should be royalty-free as long as the product is used for the defence contract.
On Feb 2, 3:20 pm, Vladimir Vassilevsky <antispam_bo...@hotmail.com>
wrote:
> spw...@gmail.com wrote:
> > Hello, I sent a request to get MELPe through s5066.nc3a.nato.int two
> > months ago, but I did not receive a reply. Is there another way to the
> > MELPe with 600 bps. Could someone in the USA share the updated MELPe
> > code with me?
>
> 1. AFAIK MELPe 1200/600 is proprietary to Compandent.
> 2. Voice coders below 2400 bps are subject to US export regulations. I
> don't think you will find a code.
>
> Vladimir Vassilevsky
>
> DSP and Mixed Signal Design Consultant
>
> http://www.abvolt.com
I am a US citizen and my company in US works for the defense contract,
there should be no export problem at all. MELPe should be royalty-free
as long as the product is used for the defence contract.
Reply by Vladimir Vassilevsky●February 2, 20072007-02-02
spweda@gmail.com wrote:
> Hello, I sent a request to get MELPe through s5066.nc3a.nato.int two
> months ago, but I did not receive a reply. Is there another way to the
> MELPe with 600 bps. Could someone in the USA share the updated MELPe
> code with me?
1. AFAIK MELPe 1200/600 is proprietary to Compandent.
2. Voice coders below 2400 bps are subject to US export regulations. I
don't think you will find a code.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
Reply by ●February 2, 20072007-02-02
Hello, I sent a request to get MELPe through s5066.nc3a.nato.int two
months ago, but I did not receive a reply. Is there another way to the
MELPe with 600 bps. Could someone in the USA share the updated MELPe
code with me? Please sent the code to
kathyz@torreypinestechnologies.com
or mail the code to
Kathy Zhang
Torraypines Technologies Inc.
12396 World Trade Drive
Suite 117 San Diego
California 92128-3788
USA