License Management for Secure HD Content Playback
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Solution Overview
Problem
Existing playback devices are unable to play high definition (HD) and ultra-high definition (UHD) content, and there is a need for a method to manage and secure the playback of such content, including license management and prevention of copying.
Innovation Solution
A system architecture is defined for playing secure HD content, including device configuration, network setup, transmission protocols, content directory structures, file formats, and license management, with the use of near-field communication (NFC) for secure content playback between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing playback devices are used, then device compatibility is maintained, but the ability to play HD and UHD content is lost
Solution Approach 1:
The patent introduces a server as an intermediary between the storage device and the playback device. The server receives content from the storage device, converts it into formats compatible with the playback device's capabilities, and transmits the converted content back to the playback device. This allows existing playback devices to play HD and UHD content without requiring the playback device itself to be upgraded or certified for HD content playback.
2Adaptability or versatility
If HD content is distributed, then content availability is improved, but copying prevention becomes more difficult
Solution Approach 1:
The patent extracts the content from the storage device and processes it through the server before delivery to the playback device. The server manages the content distribution and can implement copy protection measures by controlling how content is converted and transmitted. This separation allows the system to maintain content security while enabling wide distribution across different devices.
3Reliability
If license management is implemented, then playback rights are secured, but system complexity increases
Solution Approach 1:
The server is designed to perform multiple functions: receiving content from storage devices, converting content formats, managing license information, controlling playback rights, and transmitting content to playback devices. By consolidating these functions into a single multi-functional server system, the patent simplifies the overall architecture compared to having separate dedicated systems for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables users to play HD and UHD content on unsupported devices by searching and downloading alternative files, provides secure management of HD content data, and enhances license management, allowing existing certified devices to play HD content without additional certification and ensuring continuous playback rights.
Implementation Method 1
a method for playing secure high definition content by using NFC between devices
Data Source
AI summary
A method for managing license information for playback of content, includes transmitting certificate information of a storage device to a license serve, updating a certificate revision list received from the license server on the basis of the certificate information, receiving encrypted license information allowing the content to be played through a first session established between the storage device and the license server, the first session being identified by session identification information, and decrypting the encrypted license information and storing the decrypted license information to a secure region.