Content Export Terminal License Management for Abnormal Suspension
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Solution Overview
Problem
In the direct export service, progressive export processing can be abnormally suspended, leading to the consumption of an additional export license, which decreases user benefit as the export license is consumed even if the processing is interrupted, such as by power loss or application switching.
Innovation Solution
A content receiving terminal that encrypts and exports video image content directly to a portable medium, where the decryption key is not recorded, allowing for resumed export processing without consuming another export license by managing the export license and decryption key appropriately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If progressive export processing is implemented to allow content reproduction during download, then user convenience is improved, but the system becomes vulnerable to abnormal suspension and unnecessary license consumption
Solution Approach 1:
The patent applies preliminary action by checking the completion status of export processing before allowing content reproduction. The control unit determines whether export processing has been completed before permitting reproduction, preventing abnormal suspension issues. This preliminary check ensures that the system state is appropriate for reproduction, resolving the contradiction between user convenience and processing stability.
2Device complexity
If export license is consumed upon interruption of progressive export processing, then license management is simplified, but user benefit decreases due to unnecessary license consumption
Solution Approach 1:
The patent implements feedback by continuously monitoring the completion status of export processing and using this information to control license consumption. The control unit determines whether to permit reproduction based on the completion status, creating a feedback loop that prevents unnecessary license consumption while maintaining simplified license management. This feedback mechanism resolves the contradiction between management simplicity and resource conservation.
3Adaptability or versatility
If content reproduction is permitted during ongoing export processing, then user accessibility is improved, but system reliability deteriorates due to potential abnormal suspension
Solution Approach 1:
The patent applies dynamics by making the permission to reproduce content conditional and changeable based on the export processing status. The control unit dynamically adjusts the reproduction permission state according to whether export processing has been completed. This dynamic control allows the system to adapt between high accessibility (when processing is complete) and high reliability (when processing is ongoing), resolving the contradiction between adaptability and reliability.
Data Source
AI summary
A content exporting and reproducing method includes i) a content export step of encrypting a decryption key for content, that is used for decrypting the encrypted content, by using an encryption key for decryption key, recording the encrypted decryption key for content in the portable recording medium, and exporting the encrypted content sequentially to the portable recording medium, and ii) a content reproduction step of reading out the encrypted decryption key for content from the portable recording medium, decrypting the encrypted decryption key for content by using a decryption key for decryption key, reading out the encrypted content that has been exported to the portable recording medium, and decrypting the encrypted content that is read out from the portable recording medium, by using the decrypted decryption key for content to reproduce the content, while the encrypted content is exported to the portable recording medium sequentially.