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Hi,

   It means that FIR filter is designed using truncated sinc function by hamming window. This
FIR filter corresponds to a low-pass linear phase filter and is used to interpolate between
speech samples (upsample or downsample).
   For more information you can consult the theory of band-limited interpolation.

>  
>
>    
>  dear All,  
>  
>I have some difficulties in understanding windowed sinc interpolation using FIR  
>filter  
>in adaptive codebook search process of CELP...(g729)  
>  
>anyone have some reference?  
>  
>thx a lot  
>  
>regards,  
>arida  
>  
>  
>  
>      	    
>  
>

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