MELP / MELPe vocoder and IMBE vocoder
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From: CR on 3 Feb 2006 13:26 Does anyone have any link or results of speech quality comparison between IMBE vocoder (or AMBE) and MELPe / MELP vocoder at rates 2400, 1200, 600 bps? I heard MELPe vocoder sounds much better, is that true? What about other aspects such as robustness to background noise & channel errors? Claudia R.
From: Vladimir Vassilevsky on 3 Feb 2006 14:25 CR wrote: > Does anyone have any link or results of speech quality comparison > between IMBE vocoder (or AMBE) and MELPe / MELP vocoder at rates 2400, > 1200, 600 bps? You can see it for yourself. MELP samples are here: http://www.signalogic.com/ MBE samples are here: http://www.spiritdsp.com http://www.dvsinc.com > I heard MELPe vocoder sounds much better, is that true? Yes. Vladimir Vassilevsky DSP and Mixed Signal Design Consultant http://www.abvolt.com
From: fizteh89 on 3 Feb 2006 15:30 What's the difference between MELP and MELPe ? As far as I know, MELP algorithm is described in some original articles, books on speech coding, US patents and there is even some reference C code available from some web site. Where is MELPe algorithm described ? (other than in Compandent's marketing brochures)
From: Vladimir Vassilevsky on 3 Feb 2006 15:52 fizteh89 wrote: BTW, did you graduate MiPh&T? > What's the difference between MELP and MELPe ? MELPe is brand name for MELP below 2400 bps. The main difference from the original MELP is in the advanced VQ of the parameters. > As far as I know, MELP algorithm is described in some original > articles, books on speech coding, US patents and there is even some > reference C code available from some web site. > > Where is MELPe algorithm described ? (other than in Compandent's > marketing brochures) MELPe 1200/2400 is adopted as a federal standard MIL-STD-3005. The documentation should be available. Vladimir Vassilevsky DSP and Mixed Signal Design Consultant http://www.abvolt.com
From: fizteh89 on 3 Feb 2006 16:01
>BTW, did you graduate MiPh&T? Yep, FOPF back in 1989. Did you ? >MELPe 1200/2400 is adopted as a federal standard MIL-STD-3005. The >documentation should be available. Where ? IPR-wise, what additional US patents are included in MELPe standard (if you happen to know) ? |