Methods of associating data content with objects of rights in a communication system and to provide conditional access system to implement a method, the receiving device of flow to obtain conditional access to a stream of encrypted data, computer program product, and D Starting out for the transmission generated by a method.

摘要

Methods of associating data content with objects of rights in a communication system and to provide conditional access system to implement a method, the receiving device of flow to obtain conditional access to a stream of encrypted data, computer program product, and D Starting out for the transmission generated by a method.It is described a communication system (10; 300; 400; 2700) including a transmitter of data content and at least one data receiver (50; 500; 2600). The system (10; 300; 400; 2700) implements a method for associating data content with objects of rights.The method includes the steps of (a) providing data content, objects of rights and rights for the content.And control messages to control subsequent processing of the contents; (b) to generate textual identifiers that are operable to associate said content with such objects of rights; (c) to transform the textual identifiers in numerical data corresponding identification.These numerical data being more compact than their corresponding textual identifiers; and (d) compile numerical data, the objects of rights, and the output messages for transmitting and receiving the at least one subsequent data receiver (50; 500; 2600).Transform the textual identifiers is potentially less data to be transmitted and therefore a requirement of bandwidth limited. The method is applicable, for example, digital video broadcasting (DVB).