20. A similar word discrimination apparatus for discriminating words that may be misrecognized because of their similarity having a learning dynamic recurrent neural networks (DRNN) voice model that performs recognition processing to obtain specified output showing a level of correctness in response to voice data of input words, comprising: a DRNN sub-voice storage means for storing a learning DRNN sub-voice model that generates DRNN output showing a level of correctness for characteristic components of the respective similar words that may be misrecognized; a word detection signal output means that outputs the level of correctness at a predetermined level or greater from the DRNN voice model and from the DRNN sub-voice model in response to the voice data of the input words, when there is vocal input of some words; and a processing means that, when the word detection signal output means generates a DRNN output showing a level of correctness above a predetennined level, establishes a specified period that includes characteristic components of the vocal data of the input words, uses the DRNN sub-voice model to examine the DRNN output characteristics of the vocal data of the input words during the specified period, and performs discrimination of the input words and the words that are similar to the input words on the basis of the examination results.
20. A similar word discrimination apparatus for discriminating words that may be misrecognized because of their similarity having a learning dynamic recurrent neural networks (DRNN) voice model that performs recognition processing to obtain specified output showing a level of correctness in response to voice data of input words, comprising: a DRNN sub-voice storage means for storing a learning DRNN sub-voice model that generates DRNN output showing a level of correctness for characteristic components of the respective similar words that may be misrecognized; a word detection signal output means that outputs the level of correctness at a predetermined level or greater from the DRNN voice model and from the DRNN sub-voice model in response to the voice data of the input words, when there is vocal input of some words; and a processing means that, when the word detection signal output means generates a DRNN output showing a level of correctness above a predetennined level, establishes a specified period that includes characteristic components of the vocal data of the input words, uses the DRNN sub-voice model to examine the DRNN output characteristics of the vocal data of the input words during the specified period, and performs discrimination of the input words and the words that are similar to the input words on the basis of the examination results. 22. The similar word discrimination apparatus of claim 20, wherein: the DRNN voice model creates correspondence between groups of words having similar word groups and generates a DRNN output showing the level of correctness at a predetermined level or greater for each of the similar word groups of the group of words.