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Speech recognition method and device for children

A voice and children's technology, applied in speech recognition, speech analysis, instruments, etc., can solve the problems of many meaningless modal particles, large changes in pronunciation speed, insufficient pertinence, etc., to improve the recognition rate, strong pertinence, and recognition rate. high effect

Active Publication Date: 2017-02-08
SHANGHAI YUANQU INFORMATION TECH
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AI Technical Summary

Problems solved by technology

However, compared with adults, children's pronunciation has the characteristics of short vocal tract length, large changes in pronunciation speed, and more meaningless modal particles. Therefore, the speech recognition system using the above-mentioned known corpus is not targeted enough for children's speech. Speech recognition processing for adult speech is more accurate than for children

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  • Speech recognition method and device for children
  • Speech recognition method and device for children
  • Speech recognition method and device for children

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Embodiment Construction

[0023] figure 1 A processing flow chart of a speech recognition method for children according to an embodiment of the present invention is shown. see figure 1 , the speech recognition method of the embodiment of the present invention at least includes step S101 to step S105 of performing speech recognition through an existing speech recognition system.

[0024] In step S101, an acoustic model and a language model are respectively established through a known speech corpus and a text corpus. Wherein, the voice corpus and the text corpus can adopt the existing suitable voice corpus and text corpus, and the amount of data of adults in both the voice corpus and the text corpus is much larger than that of children.

[0025] In step S102, the voice signal from the child is received, and front-end processing is performed on the voice signal. Common front-end processing may include, for example, noise removal.

[0026] In step S103, feature extraction processing is performed on the ...

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Abstract

The invention provides a voice recognition method and device oriented towards a child. The voice recognition method comprises the steps that an acoustic model and a language model are built; a voice signal of the child is received, and front-end processing is carried out on the voice signal; the acoustic features of the voice signal are obtained; decoding search is carried out on the acoustic features of the voice signal according to the acoustic model and the language model so as to obtain a recognition text; semantic comprehension processing is carried out on the recognition text so as to obtain a semantic comprehension result. According to the built acoustic model, feature extraction and processing is carried out on all the voice linguistic data in a voice corpus, and a vocal tract length normalization technology is added to the feature extraction and processing process. According to the voice recognition method, language instructions of the child can be effectively analyzed according to the sound production characteristics that the vocal tract of the child is short, the sound production speed changes a lot, the number of meaningless voice assistance words is large, and the recognition rate of child voices is substantially increased.

Description

technical field [0001] The invention relates to the field of voice recognition, in particular to a voice recognition method and device for children. Background technique [0002] With the rapid development of smart mobile terminal technology and voice interaction technology, and the wide application of voice interaction technology in smart mobile terminals, smart mobile terminals have voice interaction functions. In the usual voice interaction technology, due to the influence of different factors such as the difficulty of collection and the cost of collection, the known corpus is dominated by adult corpus, which is more convenient to collect, and the proportion of children's corpus is small. However, compared with adults, children's pronunciation has the characteristics of short vocal tract length, large changes in pronunciation speed, and more meaningless modal particles. Therefore, the speech recognition system using the above-mentioned known corpus is not targeted enough ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L15/02G10L15/05G10L15/26
Inventor 张峰赖伟吴义坚
Owner SHANGHAI YUANQU INFORMATION TECH
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