Optimised methods of creating and rendering of a multimedia scene comprising at least one active object, without prior modification of the semantics and/or the format describing the scene

A computer program product embodied on a non-transitory computer-readable medium, comprising:

• code for associating a multimedia scene comprising a plurality of multimedia objects organized in at least one scene description tree with a sub-tree of the objects to be rendered and a standby sub-tree, where the sub-tree comprises objects intended to be rendered at a given instance, and where the standby sub-tree comprises objects intended not to be rendered at the given instance;
• code for identifying a transferable object of the sub-tree able to be transferred between the sub-tree and the standby sub-tree according to at least one predetermined transfer condition;
• code for transferring the transferable object of the sub-tree to the standby sub-tree, the transferable object of the sub-tree having an original unique identifier;
• and
• code for defining an inactive object intended to replace in the sub-tree the transferred object displaced to the standby sub-tree, the inactive object including a unique identifier that enables a return of the transferred object from the standby sub-tree to the sub-tree, wherein the unique identifier of the inactive object is obtained by application of a bijective function to the original unique identifier of the transferred object, such that uniqueness is maintained between the original unique identifier of the object transferred to the standby sub-tree and the unique identifier of the inactive object that replaced the transferred object in the sub-tree;
• wherein each of the multimedia objects include a first identification label having a first value if an object is to be placed in the sub-tree of the objects to be rendered, and a second value if the object is to be placed in the standby sub-tree;
• wherein at least one of the multimedia objects includes a second locating label having a first value if at least one ascendant of the at least one object is placed in the standby sub-tree.

A method, comprising:

• distributing, utilizing a processor, a plurality of multimedia objects organized in at least one scene description tree between a sub-tree of the objects to be rendered and a standby sub-tree, the sub-tree comprising objects intended to be rendered at a given instance, and the standby sub-tree comprising objects intended not to be rendered at the given instance, where a multimedia scene comprises the plurality of multimedia objects;
• transferring one of the plurality of multimedia objects of the sub-tree to the standby sub-tree according to at least one predetermined transfer condition, wherein the multimedia object transferred from the sub-tree has an original unique identifier;
• defining an inactive object intended to replace in the sub-tree the transferred object displaced to the standby sub-tree, the inactive object including a unique identifier that enables a return of the transferred object from the standby sub-tree to the sub-tree, wherein the unique identifier of the inactive object is obtained by application of a bijective function to the original unique identifier of the transferred object, such that uniqueness is maintained between the original unique identifier of the object transferred to the standby sub-tree and the unique identifier of the inactive object that replaced the transferred object in the sub-tree;
• and
• reconstructing the scene at a given instance, using only the objects present in the sub-tree of the objects to be rendered;
• wherein each of the multimedia objects include a first identification label having a first value if an object is to be placed in the sub-tree of the objects to be rendered, and a second value if the object is to be placed in the standby sub-tree;
• wherein at least one of the multimedia objects includes a second locating label having a first value if at least one ascendant of the at least one object is placed in the standby sub-tree.

A mobile radio communication terminal, comprising:

• a processor for:
• distributing a plurality of multimedia objects organized in at least one scene description tree between a sub-tree of the objects to be rendered and a standby sub-tree, the sub-tree comprising objects intended to be rendered at a given instance, and the standby sub-tree comprising objects intended not to be rendered at the given instance, where a multimedia scene comprises the plurality of multimedia objects;
• transferring one of the plurality of multimedia objects of the sub-tree to the standby sub-tree according to at least one predetermined transfer condition, wherein the multimedia object transferred from the sub-tree has an original unique identifier;
• defining an inactive object intended to replace in the sub-tree the transferred object displaced to the standby sub-tree, the inactive object including a unique identifier that enables a return of the transferred object from the standby sub-tree to the sub-tree, wherein the unique identifier of the inactive object is obtained by application of a bijective function to the original unique identifier of the transferred object, such that uniqueness is maintained between the original unique identifier of the object transferred to the standby sub-tree and the unique identifier of the inactive object that replaced the transferred object in the sub-tree;
• and
• reconstructing the scene at a given instance, using only the objects present in the sub-tree of the objects to be rendered;
• wherein each of the multimedia objects include a first identification label having a first value if an object is to be placed in the sub-tree of the objects to be rendered, and a second value if the object is to be placed in the standby sub-tree;
• wherein at least one of the multimedia objects includes a second locating label having a first value if at least one ascendant of the at least one object is placed in the standby sub-tree.

A computer program product embodied on a tangible computer-readable medium, comprising:

• computer code for distributing a plurality of multimedia objects organized in at least one scene description tree between a sub-tree of the objects to be rendered and a standby sub-tree, the sub-tree comprising objects intended to be rendered at a given instance, and the standby sub-tree comprising objects intended not to be rendered at the given instance, where a multimedia scene comprises the plurality of multimedia objects;
• computer code for transferring one of the plurality of multimedia objects of the sub-tree to the standby sub-tree according to at least one predetermined transfer condition, wherein the multimedia object transferred from the sub-tree has an original unique identifier;
• computer code for defining an inactive object intended to replace in the sub-tree the transferred object displaced to the standby sub-tree, the inactive object including a unique identifier that enables a return of the transferred object from the standby sub-tree to the sub-tree, wherein the unique identifier of the inactive object is obtained by application of a bijective function to the original unique identifier of the transferred object, such that uniqueness is maintained between the original unique identifier of the object transferred to the standby sub-tree and the unique identifier of the inactive object that replaced the transferred object in the sub-tree;
• and
• computer code for reconstructing the scene at a given instance, using only the objects present in the sub-tree of the objects to be rendered;
• wherein each of the multimedia objects include a first identification label having a first value if an object is to be placed in the sub-tree of the objects to be rendered, and a second value if the object is to be placed in the standby sub-tree;
• wherein at least one of the multimedia objects includes a second locating label having a first value if at least one ascendant of the at least one object is placed in the standby sub-tree.

A method, comprising:

• generating, utilizing a processor, a description signal of a multimedia scene, where the multimedia scene comprises a plurality of multimedia objects organized in at least one scene description tree, and where the objects are distributed between a sub-tree of the objects to be rendered and a standby sub-tree, the sub-tree comprising objects intended to be rendered at a given instance, and the standby sub-tree comprising objects intended not to be rendered at the given instance;
• and
• rendering the objects in the sub-tree of objects to be rendered on a terminal to reconstruct the scene, using the description signal;
• wherein only the objects present in the sub-tree of the objects to be rendered are used to reconstruct the scene;
• wherein at least one predetermined transfer condition of an object of the sub-tree controls a transfer of object between the sub-tree and the standby sub-tree, the object of the sub-tree having an original unique identifier;
• wherein an inactive object is defined, where the inactive object is intended to replace in the sub-tree an object displaced to the standby sub-tree, the inactive object including a unique identifier that enables a return of the transferred object from the standby sub-tree to the sub-tree, wherein the unique identifier of the inactive object is obtained by application of a bijective function to the original unique identifier of the transferred object, such that uniqueness is maintained between the original unique identifier of the object transferred to the standby sub-tree and the unique identifier of the inactive object that replaced the transferred object in the sub-tree;
• wherein each of the multimedia objects include a first identification label having a first value if an object is to be placed in the sub-tree of the objects to be rendered, and a second value if the object is to be placed in the standby sub-tree;
• wherein at least one of the multimedia objects includes a second locating label having a first value if at least one ascendant of the at least one object is placed in the standby sub-tree.