Method for protection of data reproduction according to both medium and apparatus protection data and a medium therefor
AssigneeVictor Company of Japan, Ltd.
InventorTakayuki Sugahara
Life of this patent
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AssigneeVictor Company of Japan, Ltd.
InventorTakayuki Sugahara
Estimating the term…
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 for generating apparatus protection data which are specific to the reproduction apparatus, a section for combining the apparatus protection data with the medium protection data to define a protection level, and a section for applying the protection level to restrict reproduction 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.
A data medium for transferring main data to a reproduction apparatus for reproduction by the reproduction apparatus, characterized in that:
A reproduction protection method for operating on main data which are conveyed by a data medium, the method comprising the steps of:
Dependencies are inferred from the claim text.