Patent ID: 7920565

Claim:
Method for updating a segment of a data record in a digital video or audio receiver, said data record consisting of at least a single segment, in which the segment is identified by a version number, a limited range of values being available for the segment version number and the range of values being run through periodically, the segment being transmitted in the form of one or a plurality of data packets over an unsecured data link, characterized by the steps of: classifying the range of values for the version number into two sub-ranges, hereinafter called “old” and “new”, wherein for the division of the sub-ranges the periodicity with which the range of values is run through and the current version number is taken into account, so that the sub-range “new” may span values in the upper part of the range of values starting from the current version number up to a defined value in the lower part of the range of values, or that the sub-range “old” may span values in the lower part of the range of values starting from the current version number down to a defined value in the upper part of the range of values, checking the range in which the version number of a newly received segment lies, accepting the newly received segment as a current segment if the check revealed that the version number of the newly received segment lies in the range “new”, and rejecting the newly received segment if the check revealed that the version number of the newly received segment lies in the range “old”.