Bit Sequence Encoding With Disparity and Run Length Limits
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Solution Overview
Problem
Existing data transmission methods in automobiles face challenges with high error rates, inefficiencies, and complex hardware requirements due to unfavorable disparity and run length in serial data streams, which can lead to baseline drift and unreliable clock recovery.
Innovation Solution
A method for generating a bit sequence with restricted disparity and run length by segmenting an arbitrary bit sequence into predefined segments and encoding each segment into sub-symbols using subsets of encoding units that actively control disparity, allowing for parallel processing and efficient transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional data transmission methods are used in automobiles, then the system can transmit data, but the error rate increases and reliability decreases due to unfavorable disparity and run length
Solution Approach 1:
The patent segments the serial data stream into manageable units and applies specific coding schemes to control disparity and run length parameters. By dividing the data transmission into controlled segments with enforced coding rules, the system achieves reliable clock recovery and baseline stability without requiring complex hardware
Solution Approach 2:
The patent transforms the data transmission by changing key parameters - specifically enforcing disparity control (balancing 1s and 0s) and run length limitations (preventing excessive consecutive identical bits). These parameter transformations eliminate baseline drift and enable reliable clock recovery, directly improving transmission reliability while maintaining simple hardware
2Reliability
If disparity control is implemented to prevent baseline drift, then transmission reliability improves, but hardware complexity increases
Solution Approach 1:
The patent implements self-service disparity control where the coding scheme automatically balances 1s and 0s without requiring external control mechanisms. The encoding process inherently generates balanced output sequences, eliminating the need for complex external disparity management hardware while maintaining transmission reliability
Solution Approach 2:
The patent applies preliminary coding transformations to the data stream before transmission, pre-establishing the desired disparity and run length properties. By performing these control actions in advance during the encoding phase, the system avoids needing complex real-time control hardware during transmission
3Productivity
If efficient encoding schemes are used to reduce overhead, then data transmission efficiency improves, but error detection capability may be reduced
Solution Approach 1:
The patent incorporates feedback mechanisms where the receiver detects coding violations (such as invalid disparity or run length patterns) and can request retransmission or correct errors. This feedback loop maintains high efficiency by only requiring minimal redundant transmissions while ensuring robust error detection through the structured coding framework
Data Source
AI summary
A method is provided for generating an efficiently transferable bit sequence with a limited disparity and a limited run length. A correspondingly configured system arrangement as well as to a computer program product and a memory-readable medium with control commands which execute the method are provided as well.