Content Receiver Export License Management for Digital Media
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Solution Overview
Problem
Current copyright management systems for digital content, such as music and video, restrict copying and moving of content to external storage media but do not allow users to easily copy content with specific export licenses to other media, limiting user convenience and not managing usage time periods effectively.
Innovation Solution
The system allows users to export content with specific copy and move permissions, including the ability to copy content with 'ten dubbings' (nine copies plus one move) to other media, while managing usage time periods by setting and enforcing export licenses that include copy allowable times and usage time limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If copyright protection is enforced by restricting copy operations, then copyright owner rights are protected, but user convenience for copying content to external storage media is reduced
Solution Approach 1:
The patent segments the copy operation into two distinct types: move operations (transferring content to external media) and copy operations (dubbing content). Different copyright management rules are applied to each type, allowing users to move content freely while restricting unauthorized copying, thus balancing copyright protection with user convenience
Solution Approach 2:
The patent introduces dynamic copyright management where the number of allowable copy operations is controlled by a counter that decreases with each copy operation. This dynamic control allows flexible copyright protection that adapts to usage patterns while still permitting legitimate user needs for backup and portability
2Reliability
If the number of copy operations is restricted, then copyright protection is maintained, but user ability to backup and use content across multiple devices is limited
Solution Approach 1:
The patent distinguishes between move operations (which transfer content ownership to external media) and copy operations (which create duplicates). This segmentation allows content to be moved to multiple devices for legitimate use while restricting unauthorized duplication, enhancing both adaptability and copyright protection
Solution Approach 2:
The patent introduces a copyright management system that acts as an intermediary between the content and the user's copy operations. This mediator tracks and controls the number of allowable copy operations, enabling versatile content usage within legally defined boundaries
3Reliability
If contents are copied as individual items with disallowable copy restrictions, then copyright is protected, but user workflow for copying content through multiple devices becomes complex
Solution Approach 1:
The patent merges the copyright management functionality into the recorder device itself, allowing the recorder to autonomously manage copy operations for multiple contents. This integration simplifies the system by eliminating the need for separate copyright management interventions for each content item, reducing overall system complexity while maintaining protection
Data Source
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AI summary
A content receiver comprises: an acceptance unit for accepting a designation of a recording medium to which contents are to be output; a license information acquiring unit for acquiring output license information describing the output requirements of the contents; and an output unit for outputting the contents to the designated recording medium. The output license information includes usage time limit information indicating the time limit of using the contents in an output destination. The output unit acquires the usage time limit information from the output license information for the contents, and sets the acquired usage time limit information to a management information storing area in the designated recording medium, thereby managing the time period of using the contents in the recording medium even if the copyright protection of the recording medium, which is an export destination, has a function to manage the time period of using the contents.