Recording medium and apparatus for protecting copyrighted digital data
AssigneeSony Corporation
InventorsKoichi Sugiyama, Etsurou Sakamoto
Life of this patent
Estimating the term…
Abstract
Copying, dubbing or reproducing copyrighted digital data can be inhibited or restricted to properly protect a copyright. AV data recorded on a pre-recorded tape is output from a reproducing unit of a first digital VCR with protective information indicating whether the copy of the AV data is inhibited or not. The protective information is input with the A/V data to a second digital VCR. Copy permission information of a blank tape loaded in the second digital VCR is discriminated and the second digital VCR records the AV data supplied from the first digital VCR based on the protective information and the copy permission information.
Claims12
A method for controlling usage of digital data on a recording medium, comprising the steps of:
- retrieving first information associated with the recording medium, the first information indicating a protection level of the recording medium to use the digital data;
- retrieving second information associated with the recording medium, the second information indicating a protection level of the recording medium;
- comparing the first information with the second information;
- and
- displaying a notification on a monitor if, after the comparing, usage of the digital data is not permitted.
An apparatus for controlling usage of digital data on a recording medium, comprising:
- first retrieving means for retrieving first information associated with the recording medium, the first information indicating a protection level of the recording medium to use the digital data;
- second retrieving means for retrieving second information associated with the recording medium, the second information indicating a protection level of the recording medium;
- comparing means for comparing the first information with the second information;
- and
- display means for displaying a notification on a monitor if usage of the digital data is not permitted.
An apparatus for controlling usage of digital data on a recording medium, comprising:
- a controller for retrieving first information associated with the recording medium, the first information indicating a protection level of the recording medium to use the digital data and a second information associated with the recording medium, the second information indicating a protection level of the recording medium;
- and
- a comparator for comparing the first information with the second information,
- wherein a notification is displayed on a monitor if usage of the digital data is not permitted.
The apparatus according to 11, further comprising:
- a transforming means for transforming the digital data into a form that can be reproduced by the recording apparatus.
Dependencies are inferred from the claim text.