Multimedia courseware retrieval system based on voice keyword recognition

A multimedia courseware and retrieval system technology, applied in the multimedia field, can solve problems such as inability to meet efficient learning and accurate search, and achieve the effects of improving query speed and accuracy, high recognition rate, and accurate positioning

Inactive Publication Date: 2014-07-30
EAST CHINA UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0004] In view of the fact that the existing technology cannot quickly and accurately find the content of the user's query in the multimedia courseware, and cannot meet the purpose of the user's efficient learning of remote courses, the technical problem to be solved by the present invention is to provide a multimedia courseware aud

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  • Multimedia courseware retrieval system based on voice keyword recognition
  • Multimedia courseware retrieval system based on voice keyword recognition
  • Multimedia courseware retrieval system based on voice keyword recognition

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Embodiment Construction

[0012] The present invention will be further introduced below in conjunction with accompanying drawing and embodiment: the method of the present invention is divided into four modules altogether.

[0013] Part 1: Automatic pre-labeling of knowledge points

[0014] The function of the knowledge point automatic pre-marking module is to associate the key and difficult knowledge point vocabulary specified by the teacher in the corresponding chapter of the courseware with the multimedia courseware, and mark the knowledge points in the multimedia audio file of the courseware through the keyword recognition technology based on the hidden Markov model The exact moment of occurrence in . This module can pre-retrieve the knowledge points in the course and locate the specific moment when they appear in the multimedia courseware before the user searches, and can quickly provide pre-marked results when the user searches. The automatic pre-labeling of knowledge points includes the followin...

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Abstract

The invention provides a multimedia courseware retrieval system based on voice keyword recognition. Firstly, a backstage converts pre-provided text knowledge points into voice models, courseware is labeled by a voice recognizing technique based on a hidden markov model to locate the accurate positions of the knowledge points in the multimedia courseware, and a reverse index based on keywords is constructed and maintained in an index module. When a user inputs text keywords in a prompt box to inquire, results in the index are extracted to be displayed to the user if the keywords are previously labeled. If the keywords are not labeled, the system can retrieve the courseware in real time, waits for feedback of the user to the results and makes statistics for the feedback information. Self-adaption training is carried out on the keywords to label the courseware again and upgrade the indexes. Compared with a traditional network course learning style system, the courseware retrieval system can quickly search for and locate the keywords of the knowledge points, improves retrieval accuracy through user interaction and finally improves the learning efficiency of students effectively.

Description

technical field [0001] The invention relates to the field of multimedia technology, in particular to a keyword-based audio retrieval method and system for multimedia courseware. Background technique [0002] In recent years, with the advancement of technology, a large number of voices have been collected and recorded and preserved in the form of audio. Among them, due to the needs of lifelong learning and network teaching, more and more multimedia audio courseware has appeared on the Internet. However, with the rapid increase of multimedia courseware, learners are faced with a large amount of teaching audio materials. If they want to find the knowledge points they want to learn, they often need to watch the materials they want to find what they need. This creates a lot of trouble for learners. Therefore, how to help learners quickly and accurately retrieve multimedia courseware and find the knowledge points they need has become an urgent problem to be solved, which involves...

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Application Information

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IPC IPC(8): G10L15/14G10L25/54G06F17/30
Inventor 李冬冬江海慧李飞标陈志华何嘉翔
Owner EAST CHINA UNIV OF SCI & TECH
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