Multi-Mode Channel Coding With Embedded FEC Mode Indication
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Solution Overview
Problem
Existing channel coding schemes for audio data in digital communication are suboptimal due to the need for fixed forward error correction (FEC) modes, which do not adapt to varying signal strengths in wireless networks, and require explicit mode signaling that reduces data rate and is vulnerable to transmission errors.
Innovation Solution
A multi-mode redundancy encoder and decoder system that applies a coloration sequence to code words, embedding the coding mode within the data, allowing the channel decoder to determine the decoding mode without separate signaling, thereby improving data transmission efficiency and resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explicit mode signaling is used to indicate the coding mode, then the channel decoder can determine the decoding mode, but the data rate is reduced and the signaling is vulnerable to transmission errors
Solution Approach 1:
The patent merges the mode indication function with the data payload by embedding mode-specific patterns directly into the coded frame structure. The coded frame contains distinctive patterns that inherently indicate the coding mode used, eliminating the need for separate signaling channels while maintaining both reliability and data rate.
Solution Approach 2:
The coded frame structure is designed to self-indicate its own coding mode through embedded patterns. The frame contains sufficient information within its structure for the decoder to autonomously determine the coding mode without external signaling, making the system self-sufficient and eliminating the Achilles' heel of separate mode signaling.
2Adaptability or versatility
If a fixed forward error correction scheme is applied, then the implementation is simple, but the system cannot adapt to varying signal strengths in wireless networks
Solution Approach 1:
The patent implements dynamic adaptability by enabling the channel decoder to automatically detect and adapt to varying signal conditions through the embedded patterns in the coded frame. The system transitions from static fixed FEC to dynamic adaptive FEC, where the decoding parameters are adjusted based on the detected coding mode and signal quality indicators within the frame structure.
Solution Approach 2:
The patent changes the operational parameters of the FEC system by allowing multiple coding modes with different redundancy rates to be selected and detected dynamically. The system can switch between different error correction strengths based on the detected mode, adapting to varying channel conditions without requiring complex external control mechanisms.
3Loss of information
If the FEC mode is signaled separately from the data, then the mode indication is clear, but the data rate is reduced and the signaling becomes an Achilles' heel vulnerable to errors
Solution Approach 1:
The patent combines mode information with data transmission by embedding mode-indicating patterns within the coded frame itself. This integration ensures that mode information is preserved with the data without requiring separate signaling, thereby maintaining effective data rate while preventing loss of mode information.
Solution Approach 2:
The coded frame structure acts as an intermediary that carries both data and mode information simultaneously. The embedded patterns serve as a mediator that conveys mode indication without requiring separate signaling channels, eliminating the vulnerability of separate mode signaling while preserving mode information integrity.
Data Source
AI summary
A channel encoder for encoding a frame includes a multi-mode redundancy encoder for redundancy encoding the frame in accordance with a certain coding mode from a set of different coding modes, wherein the coding modes are different from each other with respect to an amount of redundancy added to the frame, wherein the multi-mode redundancy encoder is configured to output a coded frame including at least one code word; and a colorator for applying a coloration sequence to the at least one code word; wherein the coloration sequence is such that at least one bit of the code word is changed by the application of the at least one of coloration sequence, wherein the specific coloration sequence is selected in accordance with the certain coding mode.