Virtualclassroom provides an interest and realistic virtual learning environment by utilizing virtual reality and background fusion techniques. It can be used to demonstrate live teaching, virtual backgrounds, virtual characters (teachers and students), and learning resources. The virtual classroom software/hardware systems and solutions are supported by virtual background fusion techniques, camera tracking and match, virtual scenes generate techniques, and video/audio encoding and transmission technology. The real-time classroom activity transmission enables students in different location simultaneously immerse in study and improves the quality and effectiveness of digital learning. The in-depth research, integration, and development of the interactive virtual tutoring and collaborative instructional design technology created solid theoretical and technical foundation of classroom of the future.

2. Research Directions