12. A speech recognition device according to claim 11 , further comprising: an analog to digital converter for converting an input speech signal from analog to digital at a predetermined sampling time interval; and a speech buffer for storing the converted speech data in an order of sampling, wherein said speech data generation section generates a plurality of pieces of speech data whose start positions of non-speech regions differ, by changing a reading position from the speech buffer, and provides the speech data to each speech recognition engine.
12. A speech recognition device according to claim 11 , further comprising: an analog to digital converter for converting an input speech signal from analog to digital at a predetermined sampling time interval; and a speech buffer for storing the converted speech data in an order of sampling, wherein said speech data generation section generates a plurality of pieces of speech data whose start positions of non-speech regions differ, by changing a reading position from the speech buffer, and provides the speech data to each speech recognition engine. 13. A speech recognition device according to claim 12 , wherein said predetermined sampling time interval is for one piece of sampling data.