EDID Conversion Interface Selection for HDMI Compatibility
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Solution Overview
Problem
Existing audio and video transmission interfaces face compatibility issues due to improper selection or mismatched combinations of extended display identification data (EDID) versions, leading to difficulties in user operation and functionality.
Innovation Solution
A conversion device and method that automatically selects EDID by detecting an external device's connection interface version, determining the corresponding EDID, and notifying the signal source device to obtain the appropriate EDID, eliminating the need for manual user settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users manually select the EDID version of the video/audio sink device, then the compatibility between devices can be improved, but the ease of operation deteriorates because most users do not know how to make the appropriate selection
Solution Approach 1:
The conversion device automatically detects the connection interface version of the external device and selects the corresponding EDID version without requiring user intervention. The processing module reads the extended display identification data, determines the HDMI version (1.4, 2.0, or 2.1), and automatically configures the appropriate EDID, allowing the system to serve itself rather than requiring user knowledge or manual selection
Solution Approach 2:
The transmission module detects the external device's connection interface version by reading its extended display identification data, and this detected information is fed back to the processing module which then selects the corresponding EDID version. This feedback mechanism ensures the system automatically adapts to the connected device's capabilities, resolving the contradiction between compatibility and ease of operation
2Adaptability or versatility
If a peripheral or conversion device utilizes a newer version of the extended display identification data (EDID), then the adaptability to new devices is improved, but the compatibility with older HDMI 1.4 source devices deteriorates
Solution Approach 1:
The conversion device dynamically adjusts the EDID version based on the detected connection interface version of the external device. The processing module can switch between different EDID versions (HDMI 1.4, 2.0, or 2.1) depending on what is connected, making the system flexible and adaptive rather than fixed. This dynamic adjustment resolves the contradiction by allowing the device to be compatible with both older and newer devices as needed
Solution Approach 2:
The processing module changes the EDID version parameter based on the detected connection interface version. When an HDMI 2.0 or 2.1 external device is detected, the system uses the corresponding newer EDID version to enable advanced features, while maintaining the ability to use older EDID versions when necessary, thus resolving the contradiction between adaptability and compatibility
Data Source
AI summary
A method for automatically selecting extended display identification data (EDID) includes steps as follows. The extended display identification data of an external device is obtained through a conversion device; the conversion device is based on the extended display identification data of the external device to determine the version of a connection interface of the external device; the conversion device is based on the version of the connection interface of the external device to select a corresponding extended display identification data; the conversion device notifies a signal source device to obtain the corresponding extended display identification data.