Patent ID: 6904090

Claim:
A data medium for transferring main data to a reproduction apparatus for reproduction by the reproduction apparatus, characterized in that: said data medium also transfers medium protection data which are specific to said data medium, the reproduction apparatus generates apparatus protection data which comprise at least first apparatus protection data and second apparatus protection data, wherein said first apparatus protection data are specific to a region or country in which the reproduction apparatus is to be used, said first apparatus protection data can not be modified by a user of the reproduction apparatus; said second apparatus protection data can be modified by the user to selectively define a plurality of protection levels including at least two levels which are respectively specific to adults and to children, and said medium protection data and apparatus protection data in combination specify a degree of restriction on said reproduction of the main data by the reproduction apparatus, wherein the combination of said medium protection data and said first apparatus protection data specifies that said main data arc reproduced either in their entirety or not at all, and the combination of said medium protection data and said second apparatus protection data specifies that said main data are reproduced in their entirety, partially, or not at all, wherein, for each combination of protection levels based on said medium protection data and said apparatus protection data, there is a corresponding range of one or more possible values of final protection level, said corresponding range extending from a least severe value to a most severe value, wherein said data medium conveys both said medium protection data and said main data in an identical form.