Partial Port Receiver for Fast Multimedia Switching
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Solution Overview
Problem
Conventional multimedia switching systems experience delays due to the time-consuming authentication process when switching between multimedia sources, and existing solutions increase system cost and resource usage by requiring dedicated receivers and decryption blocks for each input port.
Innovation Solution
A multimedia interface system with an M-to-1 switch that employs a full port receiver and partial port receivers, where the full port receiver fully decodes and decrypts the selected input, while partial port receivers decode only the necessary data for content protection signaling, reducing the need for re-authentication and minimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a dedicated receiver and content decryption block are provided for each input port, then switching delay is reduced by eliminating re-authentication, but system cost and computing resources increase
Solution Approach 1:
Multiple input ports share a single common receiver and content decryption block instead of each port having its own dedicated receiver. The receiver operates in time-division manner, serving different input ports sequentially based on switch output selection, thereby reducing hardware resources while maintaining switching performance
Solution Approach 2:
The single receiver is designed to handle multiple input ports universally. It can receive and process signals from any of the M input ports depending on the switch output selection, making the receiver a multi-functional component that eliminates the need for separate receivers at each port
2Reliability
If content protection authentication is performed for each multimedia source switch, then content security is maintained, but switching speed decreases due to time-consuming authentication
Solution Approach 1:
The system maintains content protection authentication state across port switches without requiring re-authentication. The receiver preserves authentication context and encryption state, allowing the system to switch between ports while maintaining security without repeating the full authentication process
Solution Approach 2:
The content protection authentication process continues uninterrupted across port switches. The receiver maintains continuous authentication state and encryption context, ensuring that content protection remains active and effective during switching operations without requiring re-initialization
Data Source
AI summary
A system and a method are disclosed for enabling fast switching in a multimedia interface system having content protection. By using a partial port receiver to decode a portion of the input at input ports that are not being output to a multimedia sink, the design of the switching system is simplified and silicon costs are reduced. Additionally, the switching system and method reduces the switching delay by maintaining content protection signaling with all of the input ports. This eliminates the need for re-authentication when a new multimedia source is selected.