1. A speech recognition apparatus comprising: a speech recogaition unit implementing a speech recognition process by using acoustic models about a set of phonemes and language models about a chain probability of a word group consisting of the set of phonemes; and a model learning unit that (1) classifies speaking section included in speech data according to lengths of the speaking sections, (2) classifies detailed data parts corresponding to predetermined parts in each of the classified speaking sections according to start time of the predetermined parts, and (3) learns the acoustic models and the language models by using the classified detailed data parts specified both of the lengths of the speaking sections and the start time of the predetermined parts.
1. A speech recognition apparatus comprising: a speech recogaition unit implementing a speech recognition process by using acoustic models about a set of phonemes and language models about a chain probability of a word group consisting of the set of phonemes; and a model learning unit that (1) classifies speaking section included in speech data according to lengths of the speaking sections, (2) classifies detailed data parts corresponding to predetermined parts in each of the classified speaking sections according to start time of the predetermined parts, and (3) learns the acoustic models and the language models by using the classified detailed data parts specified both of the lengths of the speaking sections and the start time of the predetermined parts. 2. The speech recognition apparatus according to claim 1 , wherein the model learning unit comprises: means for detecting the speaking section in speech data and for generating a section information which indicates the detected speaking section; means for recognizing a data part corresponding to a section information in the speech data as well as text data written from the speech data and for classifying the recognized data part based on a speaking length thereof; and means for learning acoustic models by using the classified data part.