Centralized Playout Server for Digital Cinema
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Solution Overview
Problem
Conventional digital cinema systems require expensive and complex internal media blocks (IMBs) at each projector for decryption, decompression, and watermarking, which are costly and voluminous due to stringent security requirements, and necessitate large fault-tolerant storage for large cinema content.
Innovation Solution
A distributed media player with a central playout server that includes a multiplexed media processing block for ingesting, decrypting, decompressing, and watermarking media data, eliminating the need for internal IMBs at each projector and reducing content storage requirements by performing these functions in real-time at the central server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If internal media blocks (IMBs) are integrated into each projector for decryption and decompression, then content security is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the media block functionality from individual projectors and relocates it to a centralized server. The server performs decryption, decompression, and watermarking of content, while projectors only need to receive and display the processed content. This extraction eliminates the need for complex secure hardware in each projector, reducing device complexity while maintaining security through centralized control.
2Reliability
If large fault-tolerant storage is implemented at each display device for cinema content, then content availability is improved, but volume and cost increase
Solution Approach 1:
The patent merges the storage function into a centralized server that houses all cinema content. Multiple projectors share access to this single storage location through the network. This consolidation eliminates the need for duplicate storage at each projector, dramatically reducing the total volume required while maintaining content availability through the server's fault-tolerant storage system.
3Adaptability or versatility
If multiple decryption keys are stored at each screen for different content, then content versatility is improved, but security risk increases
Solution Approach 1:
The patent introduces a centralized server as an intermediary that manages all decryption keys. The server receives content, applies the appropriate decryption keys, and outputs decrypted content to projectors. Projectors never store or handle decryption keys directly; they only receive the already-decrypted content. This intermediary approach enables versatile content playback while eliminating the security risk of key exposure at multiple distributed locations.
Data Source
AI summary
Devices, systems and methods for distribution of digital content are set forth, wherein a distributed media player is provided comprising aa central playout server having a multiplexed media processing block within a tamper-responsive enclosure, the central playout server having a first input for receiving at least one decryption key and a second input for receiving media data from a content provider in response to which the multiplexed media processing block decrypts the media data using the at least one decryption key and transmits the decrypted media data over a local network to a plurality of devices as an encrypted data stream.