Speech recognition device and speech recognition method, data base for speech recognition device and constructing method of database for speech recognition device

A speech recognition method of a speech recognition device, the method comprising:

• classifying collected corpora into domains consistent with functions of the speech recognition device;
• extracting collected basic sentences based on functions of the speech recognition device from the corpora in the domains;
• storing the extracted collected basic sentences based on the functions of the speech recognition device;
• receiving a user's corpus;
• and
• comparing a received basic sentence extracted from the received user's corpora with the stored collected basic sentences, and determining a function intended by the user's corpus based on a result of the comparing.

A constructing method of a database for a speech recognition device, the constructing method comprising:

• classifying collected corpora into domains corresponding to functions of the speech recognition device and refining the corpora;
• performing at least one of grammatical error filtering, predicate filtering, change of vocabulary filtering, change of sentence pattern filtering, change of word order filtering, modifier filtering, and indirect expression filtering and extracting collected basic sentence;
• and
• storing the collected basic sentence based on the functions of the speech recognition device.