Communication Apparatus EDID Acquisition and Verification
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Solution Overview
Problem
In communication systems, such as those adhering to the HDMI standard, transmission errors or losses of Extended Display Identification Data (EDID) can occur due to cable connection issues, preventing the source apparatus from accurately determining the video format suitable for the sink apparatus, leading to inappropriate video data transmission.
Innovation Solution
A communication apparatus with a first determination unit to assess EDID transmission, a device information acquisition unit to retrieve EDID even in error conditions, and a communication unit to transmit video data based on verified EDID, ensuring appropriate format transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the source apparatus relies on EDID transmission from the sink apparatus to determine video format, then the video format can be matched to display capability, but transmission errors or losses occur due to cable connection issues
Solution Approach 1:
The source apparatus performs preliminary actions by attempting EDID acquisition before video transmission, and has pre-prepared fallback mechanisms (default video formats, multiple acquisition attempts) ready in case EDID transmission fails, allowing it to proceed with video transmission regardless of EDID reliability
Solution Approach 2:
The system implements feedback by monitoring whether EDID acquisition succeeds or fails, and based on this feedback, dynamically adjusts behavior - either using the acquired EDID to determine video format or switching to default formats and alternative acquisition methods, ensuring video transmission continues under all conditions
2Adaptability or versatility
If the source apparatus attempts to acquire EDID from the sink apparatus, then video format can be determined according to display capability, but connection issues cause transmission errors preventing correct EDID acquisition
Solution Approach 1:
The source apparatus applies local quality by treating different acquisition attempts differently - prioritizing successful EDID acquisitions that contain complete display capability information, while having fallback options for partial or failed acquisitions, ensuring video format determination adapts to the quality of available information
Solution Approach 2:
The system creates copies by attempting multiple EDID acquisitions and maintaining backup default video format configurations, so that if one acquisition fails or loses information, alternative copies can be used to ensure video transmission continues with appropriate formatting
3Productivity
If the source apparatus uses default video format when EDID acquisition fails, then video transmission can continue, but video quality may not be optimized for the sink apparatus display capability
Solution Approach 1:
The source apparatus performs partial action by attempting EDID acquisition multiple times with different parameters, and performs excessive action by preparing multiple default video format options beyond what a single default would provide, increasing the probability of obtaining or finding suitable video format information
Solution Approach 2:
The system implements dynamics by making video format selection dynamic rather than static - continuously attempting EDID acquisition and adjusting video format based on results, allowing the system to transition between default formats and EDID-based formats depending on real-time acquisition success, optimizing both continuity and quality
Data Source
AI summary
A communication apparatus includes a first determination unit that determines whether an external apparatus can transmit device information of the external apparatus to the communication apparatus, a device information acquisition unit that acquires the device information from the external apparatus even when the first determination unit determines that the external apparatus cannot transmit device information of the external apparatus to the communication apparatus, a second determination unit that determines whether the device information acquired from the external apparatus is correct, and a communication unit that transmits video data corresponding to the device information to the external apparatus if the second determination unit determines that the device information is correct even when the first determination unit determines that the external apparatus cannot transmit device information of the external apparatus to the communication apparatus.