Sound and picture synchronizing device applied to interactive teaching system

Abstract

The invention discloses a sound and picture synchronizing device applied to an interactive teaching system. The sound and picture synchronizing device comprises a video division unit, an audio division unit, a synthesis unit and a manual adjusting unit. The video division unit evenly divides a video into small sections of the certain time length according to a time shaft. The audio division unit evenly divides a corresponding audio into small sections of the certain time length according to the time span, and the small sections of the audio are coincident with the small sections of the video in number. The synthesis unit plays the video / audio according to the normal schedule. Every time when the start of one small section is played, the start of the corresponding section of the audio / video begins to be played. The mode of adjusting one whole section is used in the playing process, and the schedule of the sections of the audio / video is adjusted manually. According to the sound and picture synchronizing device applied to the interactive teaching system, network transmission files can be compressed more effectively by dividing the video and the audio into the small sections of the certain time length, dependence on network bandwidth is weaker, and the sound and picture synchronizing device is particularly beneficial for transmitting related content in the network environment in a remote mode.

Description

technical field [0001] The invention relates to an audio-video synchronization device applied to an interactive teaching system. Background technique [0002] The existing classroom interactive system compresses and converts the collected audio and video files together. Because a file or a transmission package contains both video and audio information, the files are usually relatively large, resulting in delay in transmission. However, if the audio and video files are transmitted separately, the problem of audio and video out of sync will occur. Contents of the invention [0003] Aiming at the above problems, the present invention develops a synchronous device for audio and video applied to the interactive teaching system, including [0004] Video cutting unit: Divide the video into small segments of a certain length on average according to the time axis, [0005] Audio cutting unit: averagely divide the corresponding audio into small segments of a certain length accord...

AI Technical Summary

Problems solved by technology

[0002] The existing classroom interactive system compresses and converts the collected audio and video files together. Because a file or a transmission package contains both video and audio information, the files are usually relatively large, resulting in delay in transmission

However, if the audio and video files are transmitted separately, there will be a problem that the audio and video are not synchronized.

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