Knowledge point segmentation method for teaching video
A technology of teaching video and knowledge points, which is applied in the field of knowledge point segmentation of teaching videos, can solve problems that affect teaching efficiency, cannot popularize teaching videos, and cannot clearly understand the directory of course knowledge points, etc., and achieve the effect of convenient retrieval
Active Publication Date: 2018-04-27
广东广凌信息科技股份有限公司
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Problems solved by technology
Digital teaching videos are favored by the majority of teachers and students. Nowadays, the introduction of teaching videos is mainly based on text descriptions. The video does not list the knowledge points or just a rough description, so that students cannot clearly understand the catalog of course knowledge points before watching the video, and cannot establish after watching the video. The outline of the knowledge point catalog affects teaching efficiency
At present, the segmentation of teaching knowledge points can be achieved by simply manually adding the outline of knowledge points to the video introduction, or only applicable to some teaching videos, such as the automatic indexing technology of knowledge points in middle school algebra teaching videos, which cannot be popularized to all teaching videos to go
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Embodiment Construction
[0021] In order to automatically establish knowledge points for teaching videos, the invention builds a knowledge base containing all possible subjects and selects identification keywords for each knowledge point, so that the invention can be applied to all types of teaching videos. In addition, the present invention provides a method for segmenting video knowledge points. Students can browse the knowledge point frame of the teaching video through the video introduction, and can quickly locate the position of the video where the knowledge points they want to watch are located, which greatly improves students' learning. efficiency.
[0022] figure 1 It is a flow chart of the knowledge point segmentation principle of the present invention. In the present invention, the subject content of the teaching video file is named in advance, and the subject of the teaching video can be obtained according to the name of the teaching video file. At the same time, construct a subject knowl...
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The invention discloses a knowledge point segmentation method for a teaching video. The method comprises the steps of a knowledge point building step: building subject knowledge points for the teaching video, and setting corresponding keywords for the subject knowledge points; a teaching video segmentation and semantization step: extracting audio data of the teaching video, segmenting the teachingvideo into a plurality of video elements according to speech pause time in the audio data, and converting the audio data corresponding to the video elements into video element characters; and a teaching video knowledge point determination step: counting the frequency of the keywords of each subject knowledge point included in the video element characters, generating a relation table of the videoelement time and the keyword frequency for each subject knowledge point, removing the video elements, which are isolated in time dimension, in the plurality of video elements, and then determining oneof the subject knowledge point to serve as the knowledge point of each video element according to a principle of covering the front knowledge point with the subsequent knowledge point.
Description
technical field [0001] The invention relates to a method for segmenting knowledge points of teaching videos. Background technique [0002] With the rapid development of information technology, digital teaching resources have been greatly promoted. The use of digital video teaching can record the teacher's course teaching, and students can repeatedly review teaching after class to achieve the purpose of mastering knowledge points. Digital teaching videos are favored by the majority of teachers and students. Nowadays, the introduction of teaching videos is mainly based on text descriptions. The video does not list the knowledge points or just a rough description, so that students cannot clearly understand the catalog of course knowledge points before watching the video, and cannot establish after watching the video. The outline of the knowledge point catalog affects teaching efficiency. At present, the segmentation of teaching knowledge points can be achieved by simply manual...
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IPC IPC(8): H04N21/44H04N21/439H04N21/488H04N21/8405H04N21/81H04N21/472G10L15/26G09B5/06
CPCG09B5/065G10L15/26H04N21/4394H04N21/44H04N21/47217H04N21/4884H04N21/8193H04N21/8405
Inventor 董良锋曾杰超
Owner 广东广凌信息科技股份有限公司