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Technology,
Semantic Adaptation ______________________________________________________ |
Semantic Adaptation of Multimedia Content
Semantic adaptation consists in adapting an original resource using its semantic information and therefore providing the user with the best possible experience. Semantic adaptation is not limited to the content consumer, but targets as defined by the MPEG-21 Standard, any entity that interacts in the MPEG-21 environment or makes use of Digital Items (e.g., creator and provider, right holders, distributors and consumers of Digitals Items).
The Semantic Context Information Framework (SCI Framework) introduces the possibility for a user to retrieve and consume semantic adapted content based on her/his preferences.
In order to enable semantic adaptation, the SCI Framework defines in a standardized way a set of semantic descriptors, which are used for content annotation, adaptation decision-taking (ADT) and adaptation process and to collect and store semantic user preferences.
Specific MPEG-7 compliant semantic ontologies are defined to enable a unified description of the content and context (semantic user preferences).
Use Case
A typical use case consists of a 6 year old kid who would like to visit a museum He is really interested in dolphins and consequently he proceeds to the Ocean section, where he receives on his mobile device the catalogue. Browsing the catalogue, he selects the chapter related to the dolphins in order to watch the corresponding video. The original video with a length of 5 minutes consists of different themes: (1) the reproduction of the dolphins, (2) the search for food, (3) their enemies and (4) games. The kid has no particular interest on specific themes. He just wants to see dolphins. Therefore, he receives an adapted video, where particular violent and bloody scenes (e.g., sharks wildly devouring dolphins) and sexual scenes (e.g., dolphin's intercourse) are dropped. Emphasis is instead put on nicer scenes, e.g., dolphins playing with each other, mother with its little dolphin.
Architecture
The SCI Framework is implemented by using a modular and scalable architecture and consists of:
- SemanticGenerator: provides means for the semantic annotation of a resource. It also provides facilities to generate/modify semantic descriptors for the adaptation decision-taking process and adaptation process.
- Content Digital Item Tool: builds a Content Digital Item by aggregating and packing the semantic descriptors and other content retrieved metadata.
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