Method to optimize the data stream between a router and a multimedia unit

A method for optimizing at least one sub-data stream between a router and a multimedia unit, the router receiving a data stream including a plurality of sub-data streams forming a plurality of services, the at least one sub-data stream between the router and the multimedia unit being a sub-data stream of the plurality of sub-data streams, at least one service of the plurality of services being formed of at least a portion of the plurality of sub-data streams, a subset of said portion being transmitted to the multimedia unit, and said subset including the at least one sub-data stream, the method comprising:

• defining a dataset representing a profile of the multimedia unit, the dataset including at least one of a spoken language and an access subscription of a user,
• transmitting the dataset to the router,
• configuring a filter in the router according to the transmitted dataset,
• receiving, by the router, a request from the multimedia unit for the at least one service,
• selecting said portion of the plurality of sub-data streams forming the at least one requested service,
• filtering, by the router, the subset from said portion of the plurality of sub-data streams based on the transmitted dataset, and,
• transmitting the filtered subset forming the requested at least one service to the multimedia unit.