| 摘要 |
In a reproduction apparatus, for reproducing an original signal conveyed as main data by a data medium such as a recording disk or broadcasting system, with medium protection data which are specific to the data medium being conveyed together with the main data, the apparatus includes a section (12) for generating apparatus protection data which are specific to the reproduction apparatus, a section (13) for combining the apparatus protection data with the medium protection data to define a protection level, and a section (14) for applying the protection level to restrict reproduction of of the original signal, with stepwise variations in restriction occurring in accordance with changes in protection level. The medium protection data may include information for specifying restricted reproduction of portions of the original signal, such as by producing degraded resolution within specified regions of specified frames of a video signal. <IMAGE> |
