melp2400 to melp1200, interpolation

Started by July 2, 2008
I have converted my speech application from melp2400 to melp1200. I was using fir filter to convert 8KHz speech to 32KHz. Should I need to change the filter for melp1200??? I think it should work fine because in fact we are using the melp2400 synthesis function without change. When I run my melp1200 speech application with this fir filter I feel as the voice is being lingered on, gives a fading effect. Is this problem of the filter or is it something inside melp1200?

Thanks and Regards,