DisplayPort Error Correction Circuit for PHY Setting Adjustment
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Solution Overview
Problem
DisplayPort receivers experience decoding errors due to poor channel quality, leading to incorrect pixel values and synchronization issues, as existing technologies fail to effectively correct errors in the physical layer settings.
Innovation Solution
An error correction circuit and method that utilizes an ANSI 10B/8B decoder and digital logic circuitry to actively adjust physical layer settings, including equalizer gain and clock data recovery circuit adjustments, to correct decoding errors and improve data reliability, employing a microprocessor to determine error thresholds and implement corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decoding is performed without error correction, then device complexity is reduced, but reliability of input data deteriorates due to decoding errors from poor channel quality
Solution Approach 1:
The patent applies preliminary action by performing error detection and correction before the decoding process. The error correction circuit detects decoding errors in advance and corrects them before the data is fully processed, preventing error propagation through the system. This ensures reliable input data while maintaining a manageable device complexity by integrating the correction function into the existing decoding architecture.
2Reliability
If physical layer settings are adjusted dynamically to correct errors, then reliability of input data improves, but device complexity increases due to additional control circuits
Solution Approach 1:
The patent implements feedback by using the decoding error signal to dynamically adjust physical layer settings. When decoding errors are detected, the system feeds back this information to adjust equalizer gain and clock data recovery circuit parameters, creating a closed-loop error correction mechanism. This feedback approach improves reliability by adaptively responding to channel conditions while keeping device complexity reasonable through automated control.
Solution Approach 2:
The system applies self-service by enabling the decoding error signal to automatically trigger adjustments in physical layer settings without external intervention. The error correction circuit monitors decoding errors and autonomously modifies equalizer and CDR parameters, allowing the system to self-correct errors and maintain reliable operation independently.
3Manufacturing precision
If equalizer gain and CDR settings are adjusted to correct decoding errors, then manufacturing precision of signal recovery improves, but ease of operation deteriorates due to automated control requirements
Solution Approach 1:
The patent applies self-service by enabling the system to automatically adjust equalizer gain and CDR settings based on decoding error signals without requiring manual intervention. The error correction circuit autonomously monitors decoding errors and modifies physical layer parameters, improving signal recovery precision while eliminating the need for complex manual tuning operations.
Solution Approach 2:
The system implements parameter changes by dynamically modifying equalizer gain and CDR circuit settings in response to decoding errors. This automated parameter adjustment improves signal recovery precision by adapting to varying channel conditions, while the automation itself simplifies operation by removing the need for manual parameter tuning.
Data Source
AI summary
An error correction circuit and method applicable to a DisplayPort receiver is disclosed. While decoding errors occur at a decoding stage, the invention actively adjusts settings of a physical layer by using an ANSI10B/8B decoder and performs data recovery by using a correcting unit that improves the reliability of input data.