recognizing words in a sentence I want to know that what features might be needed for recognizing a word i a sentence exactly?
I guess the routine for recognizing the word in a sentence is ganna follow this:
1-calculate voiced and unvoiced and silence frames
2-determine a threshold 
3- when ever we get to a silence frame,that could be an end point of a word besides considering other features ...
This is the main idea i guess , and if it is wrong or right or anything else,i would really appreciate if you help me out with completing these steps...
Thanks
In sentences in normal human speech, words are usually not separated by silent frames or thresholds.  Humans guess (perhaps some form of expectation driven pattern matching) at word separations, and are sometimes wrong.