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An adaptive adjustment method for teaching video playback speed

A technology of adaptive adjustment and playback speed, applied in image communication, selective content distribution, electrical components, etc., can solve the problems that the speech speed cannot adapt to the needs of different viewers and affect the learning effect

Active Publication Date: 2020-12-29
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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Problems solved by technology

[0005] The main purpose of the present invention is to propose an adaptive adjustment method for teaching video playback speed based on the ant colony algorithm. After classifying the video viewers, a corresponding playback speed path is formed for each type of viewer, so that the viewer can play at the same time. In the process of watching the teaching video, the video playback speed is dynamically adjusted according to the corresponding playback speed path to realize the self-adaptive adjustment of the playback speed, so as to solve the problem that the viewer needs to adjust the playback speed by himself when watching the online teaching video in the prior art. The problem of learning effect, and the problem that the existing program of automatically adjusting the playback speed according to the lecturer's speech speed cannot adapt to the needs of different viewers

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  • An adaptive adjustment method for teaching video playback speed
  • An adaptive adjustment method for teaching video playback speed
  • An adaptive adjustment method for teaching video playback speed

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] The specific embodiment of the present invention provides a kind of self-adaptive adjustment method of teaching video playback speed, refer to figure 1 , the method includes the following steps:

[0021] Step S1, divide the video into T time periods, and preset m possible playback speeds v for each time period 1 ,v 2 ,v 3 ,...,v m . Among the T time periods, the first T-1 time periods are equally divided, and the duration is t space , assuming the total duration of the video is t total , then there is: T=[t total / t space ]+1; [ ] means to round the number in the brackets. For each time period, preset v 1 ,v 2 ,v 3 ,...,v m , for example, the possible playback speed of each time period is {0.75, 0.8, 0.85, ..., 1.3, 1.35, 1.4, 1.45, 1.5}, m=16 in this example. It should be understood that those skilled in the art can set di...

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Abstract

The invention discloses an adaptive adjustment method for teaching video playing speed. The adaptive adjustment method comprises the following steps: constructing a general pheromone matrix, a classification pheromone matrix and a speed migration parameter matrix of a video by utilizing T time periods of the video and m preset playing speeds; collecting preview feedback of the viewers to classifythe viewers; calculating an initial playing speed according to the viewer type; in the watching process, according to the speed migration parameter matrix, the playing speed of the current time period, and the general pheromone matrix and the classification pheromone matrix which are updated after the previous watcher watches, calculating the probability that the playing speed is changed into eachspeed of m speeds when the current watcher watches the next time period; adjusting the playing speed of the current viewer in the next time period according to the probability; after playing, generating a playing speed path of the video watched by the current viewer; and collecting after-class feedback of the viewer and updating the general pheromone matrix and the classification pheromone matrixaccording to the after-class feedback and the playing speed path.

Description

technical field [0001] The invention relates to an adaptive adjustment method for teaching video playback speed, which belongs to the field of computer applications. Background technique [0002] In the process of online learning by watching videos, the lecturer's speech speed will affect the video viewers' understanding of the material and their enthusiasm for learning. However, viewers with different knowledge bases and different habits often have different requirements for the speaking speed of the lecturer. Not only that, but the optimal teaching speed is also closely related to the course theme of the corresponding interval, the type of lecture content, and the difficulty of the content. [0003] Most of the existing video speed adjustment methods require the viewer to actively adjust the playback speed during the learning process. However, in order to keep the teaching speed of the parts with different levels of difficulty always in an appropriate range, the speed of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/845H04N21/2387H04N21/466
Inventor 于昊袁博
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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