Aggregation Apparatus Copyright Protection Multi-Medium
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Solution Overview
Problem
Existing content protection systems, such as CPRM, are inadequate for aggregating and protecting copyrighted contents recorded on multiple recording mediums, as they primarily focus on single-medium protection and do not facilitate convenient portability while ensuring copyright protection.
Innovation Solution
An aggregation system comprising an aggregation apparatus and a reproduction apparatus that obtain, judge, and record main and sub contents onto a single recording medium, while ensuring copyright protection by modifying reproduction control information and utilizing decryption keys to control content access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If contents recorded on multiple recording mediums are aggregated and recorded onto another recording medium, then user convenience and portability are improved, but copyright protection is compromised because the aggregated content can be reproduced from the destination medium
Solution Approach 1:
The system performs preliminary actions by modifying reproduction control information on the source recording medium before aggregation occurs. Specifically, the reproduction permission flag is changed from 'permitted' to 'not permitted' on the source DVD, and decryption keys are invalidated, preventing subsequent reproduction from the source medium while allowing reproduction from the aggregated destination medium
Solution Approach 2:
The system implements feedback mechanisms where the aggregation apparatus communicates with reproduction apparatuses to verify reproduction status and control permissions. The reproduction control information is dynamically adjusted based on aggregation events, creating a closed-loop system that maintains copyright protection while enabling convenient aggregation
2Reliability
If conventional CPRM protection is applied to prevent unauthorized copying, then copyright protection is improved, but the ability to aggregate contents from multiple mediums for enhanced portability deteriorates
Solution Approach 1:
The system introduces dynamic reproduction control where permissions are not static but change based on aggregation events. The reproduction permission flag on source media is dynamically changed from permitted to not permitted when aggregation occurs, and decryption keys are dynamically invalidated. This dynamic approach allows the system to adapt copyright protection to the specific context of aggregation while maintaining security
Solution Approach 2:
The aggregation apparatus serves as an intermediary that mediates between the source recording mediums and the destination medium. It manages the complex interactions of copying content, modifying reproduction control information, and coordinating with reproduction apparatuses. This intermediary role enables the system to maintain copyright protection while facilitating the aggregation process that would otherwise be restricted by conventional CPRM
Data Source
AI summary
An aggregation system aggregates contents recorded on a plurality of recording mediums and recording them onto another recording medium while protecting the copyrights of the contents is provided. The aggregation system includes an aggregation apparatus and a reproduction apparatus. The aggregation apparatus obtains a main content from an optical disc, obtains a sub content from a memory card, and aggregates the obtained main content and sub content and records them onto a portable medium. The reproduction apparatus obtains the main content from the optical disc, obtains reproduction control information for controlling reproduction of the main content, and reproduces the main content recorded on the optical disc based on the reproduction control information.