Patent Document ID: 20120036159
Application ID: 13203371
Patent Flag: 0

Claim One:
1. A speech search device for receiving a speech as an input and searching for speech data obtained by sampling the input speech, the speech search device comprising: a database-use speech recognizer that recognizes the speech recorded in the speech database; a speech-use phoneme string generation unit that generates a phoneme string from a word string recognized by the database-use speech recognizer; a suffix array generation unit that generates a suffix array from the phoneme string generated by the speech-use phoneme string generation unit; an input device that inputs a search keyword; an input phoneme generation unit that generates the phoneme string from the search keyword input by the input device; a speech search unit that searches the suffix array for the search keyword by dynamic programming; and an output device that outputs a result of the search by the speech search unit, wherein the speech search unit includes: means for setting first threshold to be used in search; means for searching for a search object by dynamic programming by using the first threshold; and threshold adjustment means for repeatedly performing search as consecutively increasing the first threshold and presenting a result of the search consecutively.