Secure Processor OPL Content Reproduction Power Management
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Solution Overview
Problem
Electronic devices experience unnecessary power consumption when reproducing contents with an Output Protection Level (OPL) set, due to continued decoding and rendering processes for extension devices that cannot output the protected content, leading to user dissatisfaction and increased energy usage.
Innovation Solution
A secure processor within the electronic device decrypts and decodes contents only when allowed for external output, stopping the generation of decoded data for extension devices with OPL restrictions, and generates screen information to inform of output limitations instead, using HDMI or Wi-Fi displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the electronic device continues to perform decoding and rendering processes for extension devices when OPL is set, then the extension device can receive decoded data, but unnecessary power consumption occurs
Solution Approach 1:
The electronic device checks the OPL setting before initiating the decoding and rendering processes. By performing this check in advance, the device avoids unnecessary decoding operations for protected content, thereby preventing power consumption while maintaining the ability to reproduce content when permitted
Solution Approach 2:
The device performs only the necessary portion of the content reproduction process based on the OPL setting. When OPL is set, the device stops at the checking stage without proceeding to full decoding and rendering, thus avoiding excessive action and the associated power consumption
2Reliability
If the extension device outputs a screen preventing output limitation in an overlapped manner, then the output limitation is prevented, but user satisfaction decreases
Solution Approach 1:
The electronic device extracts and displays only the necessary output limitation information on the screen, rather than allowing the extension device to overlay additional screens. This removes the problematic overlapped screen output while maintaining the output limitation protection through clear, direct information presentation
Data Source
AI summary
An apparatus and a method for outputting contents where an Output Protection Level (OPL) has been set to an extension device in an electronic device are provided. The apparatus includes a secure processor for decrypting and decoding contents where a right to use the contents has been set using a secure Operating System (OS). When receiving an external output request for contents whose external output is not allowed, the secure processor stops generating of decoded data transmitted to an extension device.