Patent ID: 8463883
Filing Date: 2013-06-11
Classification: G06F,H04N

Abstract:
1. A method for updating and managing an audiovisual data processing application included in a multimedia unit, by means of a conditional access module controlling the access to encrypted audiovisual data broadcast in a transport stream via a broadcast network and controlled by a broadcast center or a management center all or part of said data being returned by the conditional access module and transmitted to said audiovisual data processing application, said conditional access module using a firmware having a current version for processing and returning the data to the application, the method comprising the steps of; receiving by the conditional access module information indicating a maximum available version of the conditional access module firmware and a minimum required version of the conditional access module firmware, wherein the version information of the firmware is transmitted ciphered with a key known by the conditional access module and not known by the multimedia unit; decrypting by the conditional access module the version information of the firmware using the key known by the conditional access module; comparing by the conditional access module the information on the minimum required version with the current version of the conditional access module firmware; comparing by the conditional access module the information from the maximum available version with the current version of conditional access module firmware; when the comparison of the information on the maximum available version with the current version of the conditional access module firmware gives a result indicating that the maximum available version is superior to the current version of the firmware loaded in the conditional access module, when the comparison of the information on the minimum available version with the current version of the conditional access module firmware gives a result indicating that the minimum required version is superior to the current version of the firmware loaded in the conditional access module