Decoder Controller Flip Adjustment for Faster Error Correction
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Solution Overview
Problem
Current data storage devices face challenges in achieving efficient error correction and operational performance due to limitations in error correction capabilities and the speed of error correction operations, which affect data reliability and device performance.
Innovation Solution
An error correction circuit with a decoder controller that adjusts the flip number of codewords based on the success of decoding operations, performing chase decoding processes to correct errors, and managing flip numbers to optimize decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fixed flip number is used for all codewords in chase decoding, then the decoding process is simple to implement, but the error correction efficiency and operational performance are reduced
Solution Approach 1:
The patent applies dynamics by making the flip number adjustable rather than fixed. The decoder controller dynamically changes the flip number based on decoding results, transitioning from a static parameter to a dynamic one that adapts to different decoding scenarios, thereby improving error correction efficiency without excessive complexity
Solution Approach 2:
The patent implements feedback by using the result of the first decoding operation to adjust the flip number for the second codeword. The decoder controller receives feedback from the decoding process and modifies the flip number accordingly, creating a closed-loop system that optimizes error correction performance
2Reliability
If the flip number is increased to improve error correction capability, then more errors can be corrected, but the decoding time increases
Solution Approach 1:
The patent applies partial action by adjusting the flip number based on actual decoding needs rather than always using a high fixed value. The first codeword is decoded with an initial flip number, and the second codeword uses an adjusted flip number based on the first decoding result, avoiding unnecessary excessive decoding attempts and reducing overall decoding time
Solution Approach 2:
The patent changes the flip number parameter dynamically based on decoding outcomes. By adjusting this key parameter from a fixed value to a variable that changes based on decoding success or failure, the system optimizes the balance between error correction capability and decoding speed
Data Source
AI summary
The decoder controller includes flip number management section configured to, after a decoding operation for a codeword of a first direction succeeds, decrease flip numbers of all codewords of a second direction which intersect with the codeword of the first direction and have error-probable areas.