ACELP | ADPCM | AMBE | AMR | AMR-NB | CELP | Codebook | DTMF | G.723 | G.726 | G.729 | GSM | Interpolation | LPC | LSF | LSP | MELP | PCM | Perceptual | Pitch | PSOL | QCELP | Quantization | SMV | VAD | Vocoder

>  
>
>    
>  Phil-  
>  
>> I tracked this down a few years ago....  
>>   
>> The MELP patents were sold to ASPI, which was purchased by Polycom. You must  
>> contact them to get licensing information.   http://www.aspi.com    
>  
>This is incorrect; Polycom has nothing to do with MELP. Read this carefully:  
>  
>  http://www.aspi.com/tech/    
>  
>The correct info is as follows:  
>  
>1) There is no IPR for MELP/MELPe when used in mil/gov applications.  
>  
>2) For commercial apps:  
>  
>-Texas Instruments owns IPR for MELP 2400 bps; they  
>will waive fees if a TI chip is used  

I only find two patents "Mixed excitation linear prediction with fractional pitch"
and "Fractional pitch method". and I don't know if that's all.

BTW, what your contact? my e-mail: 1...@163.com
>  
>-Microsoft owns IPR for MELPe 1200 bps (acquired by  
>purchasing SignalCom in 2001)  
>  
>-there will be IPR for MELPe 600 bps, probably Harris,  
>although could be Thales Group. The 600 bps selection  
>process is ongoing  
>  
>-if the NPP (noise pre-processing) algorithm specified  
>in MELPe STANAG 4591 is used, then Lucent is the IPR  
>holder  
>  
>  
>Anyone who wants individual contact persons for the above companies, please explain  
>to me why offline, and I will ask those people for permission to give out there info  
>to you.  
>  
>-Jeff  
>  
>      	    
>  
>

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