Description of image composition with HEVC still image file format

摘要

Encapsulating an encoded bitstream representing one or more images by providing description of images and/or sub-image pictures identifying portions of the bitstream representing said images and/or sub-images of said images; providing description of at least one composite picture formed by one or more images and/or sub-image pictures and outputting said bitstream together with said provided composite picture description as an encapsulated data file. Preferably the provided composite picture description is listed in a metadata box and is signalled by a composite picture item. Preferably reference information is provided, linking said composite picture description to said images and/or sub image pictures forming the composite picture and being output with the bitstream. Preferably the reference information comprises information which indicates if image and/or sub-image pictures forming part of the composite picture are spatial parts or based on images. Also disclosed is the processing of said encapsulated bitstream. Also disclosed is the encapsulating of an encoded bitstream representing one or more images by outputting the bitstream with cropped picture information and also the processing of this encapsulated bitstream.