Data set for multimedia file, has altered set restoring partial multimedia information flow, and mark comprising complementation data which is combined with set for restoring complete information flow

摘要

The set (84) has an altered set (82) restoring a partial multimedia information flow. A mark (M) comprises complementation data (D-c) that is combined with the set (82) for restoring a complete information flow. The data completes the partial multimedia information flow for forming the complete flow. A sub-assembly comprises the mark. Another sub-assembly comprises encrypted data which are included in the data (D-c). The encrypted data is encrypted by using an encryption key. The data (D-c) has a decryption key associated to the encryption key. Independent claims are also included for the following: (1) a method for processing a data set (2) a device for processing a data set (3) a computer program comprising software instructions for performing steps of a method for processing a data set (4) a method for reading a data set (5) a device for reading a data set (6) a computer program for reading a data set (7) a data support comprising a unit for storage of a data set (8) a data support comprising a unit for storage of a computer program comprising software instructions for performing steps of a method for processing a data set or a computer program for reading a data set.