Multi-Level Data Transmission Without Reference Voltage Circuits
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Solution Overview
Problem
In high-speed data transmission, especially in compact display technologies, the use of multi-level signals for binary data transmission faces challenges such as signal level determination errors and the lack of space for command signals due to one-to-one correspondence encoding, leading to increased circuit complexity.
Innovation Solution
The method involves encoding binary data signals into multiple ternary or quaternary signals with distinct levels, using an encoding table to assign permutations for data and command codes, allowing simultaneous transmission through multiple channels and enabling efficient decoding without additional reference voltages or complex circuitry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If encoded multi-level signals are used for data transmission, then data transmission efficiency is improved, but it becomes difficult to determine each signal level and errors may occur
Solution Approach 1:
The patent embeds feedback mechanisms within the multi-level signal structure itself. By using specific signal level transitions and patterns that inherently encode timing and level information, the system provides self-verification capability. The receiver can detect signal level changes and use the transition patterns to confirm correct level identification, reducing errors without external reference voltages.
Solution Approach 2:
The patent changes the parameter representation by using multi-level voltage signals (e.g., 4-level signals representing 2 bits) instead of traditional binary signals. This parameter transformation increases transmission efficiency while the patent compensates for determination difficulties by using encoded transition patterns and level sequences that provide inherent reference information within the signal stream itself.
2Measurement precision
If additional reference voltage is provided as reference signal for multi-level signals, then signal level determination accuracy is improved, but circuit complexity increases
Solution Approach 1:
The patent implements self-service by embedding reference information directly within the transmitted signal stream. The multi-level signal encoding scheme includes inherent level reference patterns that allow the receiver to determine signal levels autonomously without external reference voltage sources. The signal itself carries the information needed for its own accurate interpretation.
Solution Approach 2:
The patent makes the data signal serve multiple functions simultaneously: it carries both the actual data information and the reference information needed for level determination. The multi-level signal structure is designed so that the same signal stream provides both data transmission and self-referencing capabilities, eliminating the need for separate reference voltage circuits.
3Device complexity
If one-to-one correspondence mapping is used for data encoding, then data transmission simplicity is maintained, but no space is left for command signals such as clock signaling information
Solution Approach 1:
The patent merges multiple functions into the data transmission signal. By using multi-level encoding (e.g., 2 bits per symbol represented by 4 signal levels), the system creates spare code combinations that can be assigned to command signals. The data signal and command signals are combined into a unified transmission scheme where the same channel carries both types of information efficiently.
Solution Approach 2:
The patent transitions from one-dimensional binary signaling to multi-dimensional multi-level signaling. This dimensional expansion creates additional coding space within the same transmission bandwidth. The extra signal levels provide additional degrees of freedom that can encode both data and command information without requiring separate channels or increasing bandwidth.
4Adaptability or versatility
If additional signals are required for command signals, then command signal transmission capability is improved, but circuit complexity increases
Solution Approach 1:
The patent creates a universal transmission channel that handles both data and command signals through a single encoding scheme. The multi-level signal structure is designed to accommodate various signal types (data, clock, control commands) using the same physical channel and decoding logic, eliminating the need for separate circuit paths for different signal types.
Solution Approach 2:
The patent uses partial action by allocating only the necessary portion of the multi-level signal space to command signals. Instead of dedicating entire separate channels to commands, the system uses specific signal level combinations or transition patterns within the data stream to convey command information, using minimal additional circuitry while maintaining full data transmission capability.
Data Source
AI summary
A method for multi-level data transmission includes encoding a data signal to be transmitted into N multi-level signals in accordance with an encoding table, where the data signal is characterized with a stream of binary data segments each of which has a data length of M bits, transmitting simultaneously the N multi-level signals through N data transmission channels, respectively; and decoding the N multi-level signals into the data signal by comparing each two of the N multi-level signals transmitted through the two data transmission channels to obtain a respective bit of the M bits of each binary data segment of the data signal based on comparison between the two corresponding multi-level signals.