Abstract: A method of encapsulating entities in a file, wherein the method comprises for at least one entity: generating a grouping data structure associated with at least one of the entities, and indicating that the at least one of the entities belong to a same group; encapsulating the grouping data structure and the entities in the file; wherein the grouping data structure is a proprietary grouping data structure comprising an universally unique identifier identifying the type of the proprietary grouping.

Abstract: A method of encapsulating image data in a media file, the image data being related to a main image to be generated based on a plurality of sub-images, wherein the method comprises: obtaining the plurality of sub-images, each sub-image being provided in at least one version; generating descriptive metadata for describing the main image and the plurality of sub-images; encapsulating the plurality of sub-images and the descriptive metadata in the media file; wherein the method further comprises: generating a progressive information defining a set of consecutive progressive steps for generating a version of the main image, each progressive step being associated with a set of sub-images versions required to generate the version of the main image; and embedding the progressive information in the descriptive metadata.

Abstract: To reproduce an interactivity of physical type between at least two parties or participants in a meeting, the system comprises at least one display screen (20, 21, 22) which comprises a first device arranged so as to detect at least one position of a human finger by measuring a first physical quantity which varies as a function of a human finger contact on said screen (20, 21, 22), and a second device arranged so as to detect at least one position of an object (30, 31, 32) equipped in such a way as to emit a uniform signal, by measuring a second physical quantity related to a reception of said uniform signal which varies as a function of the position of the object (30, 31, 32) with respect to the screen (20, 21, 22).

Abstract: To reproduce an interactivity of physical type between at least two parties or participants in a meeting, the system comprises at least one display screen (20, 21, 22) which comprises a first device arranged so as to detect at least one position of a human finger by measuring a first physical quantity which varies as a function of a human finger contact on said screen (20, 21, 22), and a second device arranged so as to detect at least one position of an object (30, 31, 32) equipped in such a way as to emit a uniform signal, by measuring a second physical quantity related to a reception of said uniform signal which varies as a function of the position of the object (30, 31, 32) with respect to the screen (20, 21, 22).

Abstract: To reproduce an interactivity of physical type between at least two participants to a meeting, the method comprises: one or more steps (102) of display of at least one information item on a display touch screen activated by a transition (101) of execution of an instruction controlled by one of the participants; and at least one step (104) of storage of said information item by associating it with a contextual event in relation to said display touch screen, activated automatically by a transition (103) of detection of said event.