Audio and video teaching device and intelligent teaching system

Abstract

The embodiment of the invention provides an audio and video teaching device and an intelligent teaching system. The audio and video teaching device is used for an intelligent blackboard or a touch control all-in-one machine and comprises a core board and an audio board, wherein the core board is used for processing acquired audios and videos; an audio processing module and an audio coding and decoding processing module are integrated on the audio board; the audio processing module comprises an echo cancellation unit, a howling suppression unit and an automatic gain control processing unit; theaudio coding and decoding processing module comprises an A / D conversion unit, a D / A conversion unit, a filtering unit and an audio mixing processing unit; and the core board is used for selectively transmitting audios obtained by audio and video processing to the audio processing module and / or the audio coding and decoding processing module according to a received control instruction or the content of the acquired audios and videos. According to the scheme, audio connection of a classroom can be simplified, the device installation and debugging time of the intelligent classroom is shortened,teaching activities of local sound amplification class and remote interactive teaching can be carried out through the intelligent blackboard, and the audio and video processing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of teaching equipment, in particular to an audio-video teaching equipment used for a smart blackboard or a touch integrated machine. Background technique [0002] At present, smart blackboards or touch all-in-one machines are widely used in the teaching field, and have become standard equipment in various classrooms of general education, vocational education, and higher education. Both the smart blackboard and the touch all-in-one machine have integrated audio sound reinforcement function, but there are basically no other audio processing functions. However, audio and video teaching is now widely used in schools, especially in classrooms. The use of audio is just needed for teaching activities. Basically, it can be said that any teaching activity is inseparable from audio. At present, the absence of audio processing in smart blackboards or touch all-in-one machines requires the addition of corresponding aud...

AI Technical Summary

Problems solved by technology

In addition, remote interactive echo cancellation and local sound reinforcement howling suppression have always been processed by pure audio algorithms. Generally, independent audio processing equipment is used in remote interaction or sound reinforcement applications. This audio processing is carried out independently and has never been used. video, so it cannot be used in video processing

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