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Speech recognition device and speech recognition method

A technology of voice recognition and voice input, applied in voice recognition, voice analysis, instruments, etc.

Inactive Publication Date: 2007-05-02
PIONEER CORP
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  • Claims
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Problems solved by technology

[0013] The problem to be solved by the present invention can be cited as an example, that is, to provide a voice recognition device and a voice recognition method, which can reduce false recognition and unrecognizable situations, and can improve recognition efficiency

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  • Speech recognition device and speech recognition method
  • Speech recognition device and speech recognition method
  • Speech recognition device and speech recognition method

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Embodiment Construction

[0019] Fig. 2 shows a voice recognition device as an embodiment of the present invention. The voice recognition device 10 shown in the figure may be a structure using the device alone, for example, or may be a structure built in other acoustic-related equipment.

[0020] In FIG. 2 , the subword acoustic model storage unit 11 stores an acoustic model for each subword unit such as a phoneme, a syllable, or the like. In addition, the dictionary storage unit 12 is a part that stores the above-mentioned arrangement form of the subword acoustic models for each word to be recognized. The word model generation unit 13 generates a word model for speech recognition based on the storage content of the dictionary storage unit 12 in combination with the subword acoustic model stored in the subword acoustic model storage unit 11 . In addition, the local template storage unit 14 stores a local template which is an acoustic model for locally extracting the utterance content for each frame of...

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Abstract

There are provided a speech recognition device and a speech recognition method capable of reducing erroneous recognition or a recognition disabled state and improving the recognition efficiency. The speech recognition device generates a word model according to a dictionary memory and a sub-word acoustic model and correlates a word model and a speech input signal according to a predetermined algorithm. The speech recognition device includes: main matching means for limiting a processing route according to a course instruction and selecting a word model nearest to the speed input signal when correlating the word model with the speech input signal according to the processing route indicated by the algorithm; local template storage means for typifying in advance the local acoustic characteristics of the uttered speech and storing it as a local template; and local matching means for correlating the local template stored in the local template storage means for each constituting part of the speech input signal, establishing acoustic characteristic for each constituting part, and generating a course instruction according to the establishment result.

Description

technical field [0001] The present invention relates to, for example, a voice recognition device, a voice recognition method, and the like. Background technique [0002] As a conventional voice recognition system, for example, a method using a "Hidden Markov Model" (hereinafter abbreviated as "HMM") shown in Non-Patent Document 1 described later is generally known. Use the HMM sound recognition method to match the entire speech sound including the word, and the word acoustic model generated by the dictionary model and the sub word (sub word) acoustic model, and calculate the matching likelihood of each word acoustic model, which will correspond to the likelihood The word of the model with the highest probability is judged as the result of voice recognition. [0003] An overview of general voice recognition processing using an HMM will be described with reference to FIG. 1 . HMM can make the state Si migrate together with time, and extract various timing signals O (O=o(1), ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L15/14G10L15/18G10L15/08
CPCG10L15/187G10L15/142G10L15/08
Inventor 外山聡一
Owner PIONEER CORP
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