Multimedia Content Adaptation via Pre-transcoding and DRM
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Solution Overview
Problem
Current multimedia content adaptation for mobile subscriber devices incurs high computational expense and results in lower playback quality due to repeated transcoding, and is hindered by the complexity of implementing Digital Rights Management (DRM) across devices with different DRM capabilities.
Innovation Solution
A method and system for storing multimedia content with original and transcoded versions, using content IDs for efficient retrieval and retranscoding, and applying optimal DRM protection based on device capabilities and content rights, allowing for 'push' mode content distribution and rights management across disparate devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If content is repeatedly transcoded for different mobile subscriber devices, then the content can be adapted to various playback environments, but the playback quality deteriorates and computational expense increases
Solution Approach 1:
The system pre-transcodes the original content into multiple format versions suitable for different device types before distribution. When a user requests content, the system retrieves the appropriate pre-transcoded version based on the user's device profile, avoiding the need for real-time transcoding and preventing quality degradation from repeated conversions.
Solution Approach 2:
The content is divided into multiple transcoded versions, each optimized for specific device categories. The system segments the content library by device type and retrieves only the relevant version needed, eliminating unnecessary transcoding operations and preserving quality.
2Adaptability or versatility
If content is repeatedly transcoded for different mobile subscriber devices, then the content can be adapted to various playback environments, but the computational expense increases
Solution Approach 1:
The system performs transcoding operations in advance during content ingestion, creating a library of pre-transcoded versions. This preliminary action shifts the computational burden from real-time delivery to initial content processing, dramatically improving delivery efficiency and reducing network load.
Solution Approach 2:
Instead of transcoding the original content repeatedly, the system creates and stores multiple copies of the content in different formats. During delivery, the appropriate copy is selected and transmitted without additional transcoding, preserving computational resources and improving productivity.
3Reliability
If DRM protection is applied to control content access, then content security is improved, but the system complexity increases due to varying device capabilities
Solution Approach 1:
The system applies different levels and types of DRM protection tailored to each device's specific capabilities. Rather than using a uniform DRM approach, the system evaluates device characteristics and applies appropriate security measures locally, balancing protection needs with device compatibility and reducing overall system complexity.
Data Source
AI summary
A multimedia content distribution method including a) storing an item of a multimedia content, b) firstly transcoding the content for playback on a first multimedia device, c) generating a content ID of the firstly transcoded content, d) storing the content ID of the firstly transcoded content in association with the stored content, e) accessing the stored content using the content ID of the firstly transcoded content, and f) secondly transcoding the stored content for playback on a second multimedia device.