Oral evaluation method and system for free reading questions
An evaluation method and question type technology, applied in speech analysis, speech recognition, instruments, etc., can solve problems such as the inability to accurately realize the automatic evaluation of free reading questions, and the lack of standard answers for free reading questions
Active Publication Date: 2020-02-07
IFLYTEK CO LTD
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[0004] Because the existing oral English evaluation technology is based on the prior text content of the specified reading text, and there is no standard answer for the free reading question type, the existing oral English evaluation technology cannot accurately realize the automatic evaluation of the free reading question type
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[0102] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.
[0103] In view of the limitation that the spoken language evaluation method in the prior art can only target the specified reading text with standard answers, the embodiment of the present invention provides a spoken language evaluation method and system for free reading aloud questions, extracting evaluation features from the speech signal to be evaluated, The extracted evaluation features include not only the universal features of pronunciation accuracy and fluency, but also the features of language expression ability for free-reading questions, so that the evaluation features can fully reflect the free-reading questions. The reading quality of the spoken language can be improved to make the evaluation m...
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The invention discloses a spoken language evaluation method through freely read topics and a spoken language evaluation system thereof. The method comprises the steps that voice signals to be evaluated are received; voice recognition is performed on the voice signals, and voice segments corresponding to all the basic voice units of the voice signals are obtained based on segmentation of the limited boundary of a recognition text; the pronunciation accuracy characteristics of the voice signals are extracted according to the recognition text and all the voice segments, and the pronunciation accuracy characteristics act as the evaluation characteristics of the voice signals; the pronunciation accuracy characteristics include any one or multiple of the following: the posterior probability of non-mistakenly recognized words, the proportion of misread words and the proportion of correctly read words; and the evaluation score of the voice signals is calculated according to the evaluation characteristics of the voice signals and an evaluation model which is constructed in advance. Automatic evaluation through the freely read topics can be accurately realized.
Description
technical field [0001] The invention relates to the technical field of speech signals, and in particular relates to a method and system for evaluating spoken language with a free reading question type. Background technique [0002] As an important medium of interpersonal communication, spoken language occupies an extremely important position in real life. With the continuous development of social economy and the intensification of globalization, people have put forward higher and higher requirements for the efficiency of language learning and the objectivity, fairness and scale of language assessment. To this end, the industry has successively developed some language teaching and evaluation systems. [0003] With the continuous maturity of oral language evaluation technology, more and more oral language learners or teachers of oral language have used this technology to teach and learn oral language. At present, the common spoken language learning scenarios are to specify t...
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IPC IPC(8): G10L15/19G10L15/02G10L15/04G10L15/08G10L15/26G09B19/04
CPCG09B19/04G10L15/02G10L15/04G10L15/08G10L15/19G10L15/26G10L2015/027G10L2015/088
Inventor 宋碧霄潘颂声宋铁高前勇
Owner IFLYTEK CO LTD