Speech recognition method and system

A speech recognition and speech technology, applied in speech recognition, speech analysis, instruments, etc., can solve the problems of endpoint detection uncertainty, strong environmental dependence, low decoding efficiency, etc., to reduce the amount of calculation, high real-time recognition, The effect of improving recognition efficiency

Inactive Publication Date: 2015-12-02
徐洋
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Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a method and system for speech recognition, which is used to solve the pro

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  • Speech recognition method and system

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Embodiment Construction

[0029] The implementation of the present invention is described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0030] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and sha...

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Abstract

The invention belongs to the speech recognition technical filed and relates to a speech recognition method and system. The method includes the following steps that: speech signals are acquired; analog-digital conversion is performed on the speech signals, so that corresponding speech digital signals can be generated; preprocessing is performed on the speech digital signals, and speech feature parameters are extracted according to corresponding preprocessing results, and a time sequence of extracting the speech feature parameters is utilized to construct a corresponding feature sequence; the speech feature parameters are matched with speech models in a template library, and the feature sequence is decoded according to a search algorithm, and therefore, a corresponding recognition result can be generated. According to the speech recognition method and system of the invention, time-domain GFCC (gammatone frequency cepstrum coefficient) features are extracted to replace frequency-domain MFCC (mel frequency cepstrum coefficient) features, and DCT conversion is adopted, and therefore, computation quantity can be reduced, and computation speed and robustness can be improved; and the mechanism of weighted finite state transformation is adopted to construct a decoding model, and smoothing and compression processing of the model is additionally adopted, and therefore, decoding speed can be increased.

Description

technical field [0001] The invention belongs to the technical field of voice recognition, in particular to an embedded voice recognition method and system. Background technique [0002] Speech recognition is a key technology for realizing human-computer interaction by using machines to recognize user voice commands, which can significantly improve the way of human-computer interaction so that users can complete more tasks while speaking commands. Speech recognition is realized by a speech recognition engine trained online or offline. The speech recognition process can generally be divided into a training phase and a recognition phase. In the training phase, an acoustic model (AM) and a vocabulary (lexicon) are statistically obtained from the training data according to the mathematical model on which the speech recognition engine is based. In the recognition stage, the speech recognition engine uses the acoustic model and vocabulary to process the input speech to obtain spe...

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Application Information

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IPC IPC(8): G10L15/02G10L15/06G10L15/28
Inventor 徐洋胡方超陈鹏张玲董雪李源源
Owner 徐洋
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