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Discussion Groups | Speech Coding | DTMF Detction

Technical discussions related to Speech Coding (all itu and other vocoders, ACELP, CELP, AMR, etc)

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DTMF Detction - Shehryar Amir - Feb 18 14:28:00 2002

Hi Thanx for your replies. I have gone through a good Article found on web. It says that no single value of "N" can meet the ITU-T specs and also gave reason for this. That why two values are needed. It has taken N= 106 (13.3msec) for high group and N =212 for lower group frequencies.(two goertzel filters are 106 samples apart). I could not understand the fisrt statement of "No single value of N can meet ITU-T spec and it's explination". Could you people explain this? For reference I am attcaching the document with this mail. Thanx in advance Shehryar

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