Anti-interference high-definition recording and broadcasting system

Abstract

The invention discloses an anti-interference high-definition recording and broadcasting system which comprises writing equipment and a wide-angled camera. A pressure sensor is arranged in the writing equipment and used for receiving sensing signals generated during writing, an auxiliary camera is arranged close to the wide-angled camera, both the wide-angled camera and the auxiliary camera are connected with a switching circuit, the switching circuit controls the corresponding camera to work, the switching circuit is connected to a computer connected with a signal conversion module, and the signal conversion module is connected to a signal sensor. The anti-interference high-definition recording and broadcasting system overcomes the defects in the prior art and is reasonable in layout, noise in signals converted through an audio AD converter is filtered out by arranging a self-adaptive noise filtering circuit so as to obtain accurate sound signals, a video collection device is combined, and the position of a speaker can be judged accurately; meanwhile, a blackboard-writing close-up image pickup system is arranged, the signals are transmitted through pressure sensing vibration, and erroneous judgment and triggering range boundedness caused by image range limitation are avoided.

Description

Technical field [0001] The invention relates to the technical field of digital teaching information acquisition equipment, and specifically belongs to an anti-interference high-definition recording and broadcasting system. Background technique [0002] The recording and broadcasting system can automatically generate classroom teaching live video while the teacher is teaching on-site, and completely record the whole process of the teacher's teaching, including the teacher's teaching process, the process of writing on the blackboard and the multimedia teaching courseware used, etc., in accordance with the time sequence of the teaching It automatically edits and generates the live video of the lecture, and at the same time, it can be broadcast live on the Internet in the way of streaming media, so that the majority of users can also play on-demand online after class, just as they are in the classroom. The existing recording and broadcasting system has the common problem of difficult...

AI Technical Summary

Problems solved by technology

The existing recording and broadcasting system has the common problems of difficult debugging and unsatisfactory results. There are two main control methods for blackboard writing: one is infrared detection. Affected by external light sources; the other is camera positioning, which judges whether to switch through image analysis. Because the image is affected by light source factors, this method has a high misjudgment rate and a small trigger range; there is also a recording system in the teaching field. Involves voice recognition stimulation technology, mainly through the recording and broadcasting system to identify the voice of the speaker and carry out camera tracking. Due to the large number of people in the classroom and the closed space, there will be voices from non-key personnel and echoes in the classroom. The existing teaching recording and broadcasting system encoding There is noise in the speech collected by the device, which makes the existing speech recognition technology misjudgment, and the camera cannot accurately track the speaker

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