System and method for interfacing mpeg-coded audiovisual...

H - Electricity – 04 – N

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Details

H04N 5/91 (2006.01) H04H 60/04 (2009.01) G06T 9/00 (2006.01) H04L 29/06 (2006.01) H04N 7/26 (2006.01) H04N 5/00 (2006.01) H04N 7/24 (2006.01)

Patent

CA 2257577

The invention provides a system and method allowing the adaptation of a nonadaptive system for playing/browsing coded audiovisual objects, such as the parametric system of MPEG-4. The system of the invention is referred to as the programmatic system, and incorporates adaptivity on top of the parametric system. The parametric system of MPEG-4 consists of a Systems Demultiplex (Demux) overseen by digital media integration framework (DMIF), scene graph and media decoders, buffers, composites and renderer. Adaptations possible with the invention include interfaces in the categories of media decoding, user functionalities and authoring, thus allowing a number of enhanced functionalities in response to use input as well as graceful degradation in response to limited system resources. The invention includes a specification of an interfacing method in the form of an application programming interface (API). Hot object, directional, trick mode, transparency and other interfaces are specified.

L'invention concerne un système et un procédé permettant d'adapter un système non adaptatif aux fins de lecture/survol d'objets audiovisuels codés (par exemple, système paramétrique de MPEG-4). Le système considéré est dit programmé, et l'adaptativité est implantée au-dessus de lui. Le système paramétrique de MPEG-4 comprend un démultiplexeur de systèmes (démux), supervisé par un cadre d'intégration de support numérique (DMIF), des décodeurs pour graphes de scènes et supports, des tampons, un système de composition et un système de rendu. Parmi les adaptations découlant de l'invention, on peut citer les interfaces propres au décodage de supports, les fonctions utilisateur et le système auteur; cela élargit le champ des possibilités pour répondre aux besoins d'entrée à l'utilisation et offre une dégradation progressive face aux ressources de système limitées. L'invention concerne en outre une spécification d'interface sous forme d'une interface de programme d'application (API). On spécifie par ailleurs l'objet actif, le mode directionnel, le mode effets ou artifices, la transparence et autres interfaces.

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