Building English Audio-Visual and Oral Mobile Teaching System Based on Virtual Augmented Reality Technology

Abstract

Aiming at the problem that the current English textbooks still provide video materials in the form of CD-ROMs, which affects the learning effect, a research method of English audio-visual mobile teaching system based on virtual and augmented reality technology is proposed. The system first builds a recognition map database and stores it in the cloud and names the corresponding video files according to the name of the recognition map, then uses Unity3D to design and render the scene, design the virtual video playback button of the ImageTarget object, and write script code to realize the recognition map database and its corresponding video, access, and finally, generate a user-friendly mobile application. Users only need to point the lens at the book illustration to present the visual effect of superposition of virtual and real and realize the playback of English teaching videos on mobile devices. The results show that compared with the original image grayscale distribution map, the pixels near the 0 value of the pixel distribution map after twice filtering are significantly reduced, which reduces the hole noise of the image, and the original image and the image after twice filtering are not 0. The peak value of the pixel is close, maintaining the detailed characteristics of the image. The application of augmented reality technology to English video teaching enables users to enjoy novel learning methods and an interactive experience combining virtual and real.