Augmented Immersive Viewing and Listening Experience Based on Arbitrarily Angled Interactive Audiovisual Representation

We propose an arbitrarily angled interactive audiovisual representation technique that combines a unique sound field synthesis with visual representation in order to augment the possibility of interactive immersive viewing experiences on mobile devices. This technique can synthesize two-channel stereo sound with constant stereo width having an arbitrary angle range from minimum 30 to maximum 360 degrees centering on an arbitrary direction from multi-channel surround sound. The visual representation can be chosen either equirectangular projection or stereographic projection. The developed video player app allows users to enjoy arbitrarily angled 360-degree videos by manipulating the touchscreen, and the stereo sound and the visual representation changes in terms of its spatial synchronization depending on the view. The app was released as a demonstration, and its acceptability and worth were investigated through interviews and subjective assessment tests. The app has been well received, and to date, more than 30 pieces of content have been produced in multiple genres, with a total of more than 200,000 views.