Playback System Endpoint Selection via HDCP Version Detection
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Solution Overview
Problem
In combined playback systems where the source and sink devices have different capabilities regarding image resolution and frame rate, determining the appropriate playback options is challenging due to limited information about the sink device's capabilities, leading to potential failures in content display.
Innovation Solution
The system determines the version of the High-bandwidth Digital Content Protection (HDCP) protocol used in the connection between the source and sink devices and sends an override message to the content service if the protocol version is earlier than 2.2, directing the client device to playback options suitable for the sink device's capabilities, ensuring reliable content playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If playback options are based on the capabilities of the source device, then high-quality content can be provided, but content display may fail when the sink device has lower capabilities
Solution Approach 1:
The system performs capability detection and HDCP version verification in advance before content delivery. By determining the sink device's playback capabilities and HDCP version beforehand, the system can pre-select appropriate playback options and endpoint URLs, ensuring reliable content display without requiring complex real-time adjustments.
Solution Approach 2:
The system introduces an intermediary capability detection mechanism that acts as a mediator between the source and sink devices. This intermediary process retrieves sink device capabilities and HDCP version information, then uses this information to determine appropriate playback options, resolving the contradiction between source device capabilities and sink device limitations.
2Adaptability or versatility
If code is provided to detect sink device capabilities, then playback options can be adjusted, but this approach is not practicable in many scenarios
Solution Approach 1:
The system implements a universal capability detection mechanism that works across multiple scenarios and device types. By using standardized HDCP version detection and capability retrieval processes, the system achieves broad adaptability without requiring scenario-specific code implementations, making the solution both versatile and easy to implement.
Solution Approach 2:
The sink device provides its own capability information and HDCP version details to the source device through standardized interfaces. This self-service approach eliminates the need for complex external detection code, as the devices automatically exchange necessary capability information, simplifying implementation while maintaining adaptability.
3Manufacturing precision
If UHD HFR content is provided to a sink device that only supports HD SFR, then content quality is maximized, but display failure occurs
Solution Approach 1:
The system dynamically adjusts content delivery parameters based on detected sink device capabilities and HDCP version. Instead of providing fixed UHD HFR content, the system adaptively selects appropriate resolution and frame rate parameters that match the sink device's capabilities, ensuring both quality optimization and reliable display.
Solution Approach 2:
The system changes content parameters (resolution, frame rate, endpoint selection) based on the detected capabilities of the sink device and HDCP version. By modifying these parameters to match the sink device's supported formats, the system prevents display failures while maintaining the highest possible quality within the device's capabilities.
Data Source
AI summary
Methods and apparatus are described for providing content playback options to content playback systems based on the capabilities of the systems. These techniques determine whether the content options should be provided based on the capabilities of a source device in a combined playback system. The version of the High-bandwidth Digital Content Protection (HDCP) protocol used to initialize the connection between the source and sink devices is determined. Based on the version of the HDCP protocol used, an override message may be sent to the content service, in response to which the media player on the source device is directed to an content service endpoint corresponding to particular set of playback options.