System and method for generation and interfacing of...

H - Electricity – 04 – N

Patent

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Details

H04N 5/91 (2006.01) H04N 7/26 (2006.01) H04N 7/24 (2006.01) H04N 7/52 (2006.01) H04N 7/58 (2006.01)

Patent

CA 2257566

The invention provides a standardized interface facility for MPEG-4 authoring, bitstream manipulation, editing and interpretation, with associated tools and interfaces to, resulting in coded bitstreams which are easier to test, check and debug while conforming to the MPEG-4 standard. The specified interfaces can also facilitate graceful degradation in the face of decreased resources by allowing editing of bitstreams. The specified interfaces can also allow creation of decodable bitstreams (137) in response to the user requests either directly (111) or indirectly embedded in the audio-visual applications (100, 138), as well as futur services. The invention specifies a bitstream input/output package in the Java programming language to facilitate bitstream encoding and decoding of audio-visual media objects, especially when coding uses the MPEG-4 standard. The invention separates fixed length and variable length coding, and allows flexible parsing which offers the potential of optimized implementation as needed to aid real-time or near real-time operation.

La présente invention concerne une installation d'interface standardisée conçue pour la création et la manipulation de trains binaires, l'édition et l'interprétation de données en MPEG-4, avec des outils et des interfaces associés, ce qui permet d'obtenir des trains binaires codés plus faciles à tester, à vérifier et à mettre au point, tout en respectant le standart MPEG-4. Les interfaces spécifiques peuvent également faciliter la dégradation progressive en cas de réduction des ressources en permettant l'édition des trains binaires. Ces interfaces spécifiques peuvent également permettre la création de trains binaires décodables (137) en réaction aux demandes de l'utilisateur, soit directement (111), soit indirectement, intégrés aux applications audiovisuelles (100, 138), ainsi que d'autres services. Cette invention concerne également un bloc entrée/sortie de trains binaires dans le langage de programmation Java qui facilite le codage et le décodage de trains binaires des objets des supports audiovisuels, notamment lorsque le codage utilise le standard MPEG-4. Cette invention fait la distinction entre le codage longueur fixe et le codage longueur variable, et permet une analyse flexible qui donne la possibilité d'une mise en oeuvre optimisée telle que celle dont on a besoin pour faciliter l'exploitation en temps réel et en quasi temps réel.

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