Audiovisual rendering apparatus and method of operation therefor

Abstract

An audiovisual rendering apparatus comprises a receiver () receiving audiovisual items and a receiver () receives metadata comprising input poses provided with reference to an input coordinate system and rendering category indications indicating a rendering category. A receiver () receives user head movement data and a mapper () maps the input poses to rendering poses in a rendering coordinate system in response to the user head movement data. A renderer () renders the audiovisual items using the rendering poses. Each rendering category is linked with a different coordinate system transform from a real world coordinate system to a category coordinate system, at least one of which is variable with respect to the real world coordinate system and the rendering coordinate system. The mapper selects a rendering category for an audiovisual item in response to a rendering category indication and maps an input pose to rendering poses that correspond to fixed poses in a category coordinate system for varying user head movement where the category coordinate system is determined from the coordinate system transform of the rendering category.