Dynamic FEC Encoding for VoIP Signal Frame Reliability
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Solution Overview
Problem
Existing data transmission methods lack reliability due to inefficiencies in error correction, particularly in poor network conditions, where packet loss can lead to damaged voice quality and lag during VoIP calls.
Innovation Solution
The proposed solution involves encoding and decoding methods that dynamically adjust the number of signal frames for forward error correction based on network status, using a new encoded frame structure that includes a flag bit to indicate the number of frames, ensuring reliable data transmission by adjusting bit rates and incorporating redundant packets to recover lost data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If forward error correction encoding is applied to multiple signal frames, then data transmission reliability is improved, but bandwidth occupation increases
Solution Approach 1:
The patent dynamically adjusts the number of signal frames (n) subjected to forward error correction encoding based on real-time network status. When network conditions are poor, a larger n value is used to enhance reliability; when conditions are good, a smaller n value reduces bandwidth occupation. This dynamic adaptation resolves the contradiction between reliability and bandwidth usage.
Solution Approach 2:
The patent changes the parameter n (number of signal frames for FEC encoding) based on network conditions. By adjusting this parameter, the system optimizes the balance between transmission reliability and bandwidth consumption, applying stronger error correction when needed and reducing overhead when network conditions are favorable.
2Reliability
If more redundant information is transmitted for error correction, then error correction capability is improved, but transmission efficiency decreases
Solution Approach 1:
The patent applies forward error correction to only n signal frames (where n ≥ 2) rather than all frames, and selectively transmits redundant information based on network conditions. This partial application of error correction maintains sufficient correction capability while avoiding the excessive redundancy that would severely impact transmission efficiency.
Solution Approach 2:
The system dynamically adjusts the level of redundancy by changing the value of n based on network status. When network conditions deteriorate, more redundant information is transmitted; when conditions improve, less redundancy is used, thereby maintaining transmission efficiency while ensuring error correction capability when needed.
3Reliability
If forward error correction is applied to maintain quality in poor network conditions, then voice quality is improved, but bandwidth consumption increases
Solution Approach 1:
The patent adjusts the parameter n (number of frames for FEC encoding) based on network conditions to optimize voice quality while controlling bandwidth consumption. In poor network conditions, a larger n provides better voice quality through enhanced error correction; in good conditions, a smaller n reduces bandwidth consumption while maintaining sufficient quality.
Solution Approach 2:
The system dynamically adapts the error correction strength by adjusting n according to real-time network status, ensuring voice quality is maintained during packet loss events while avoiding excessive bandwidth consumption during stable network conditions.
Data Source
AI summary
This disclosure relates to encoding and decoding methods and apparatuses. The method may include encoding an ith signal frame, to obtain an encoded result of the ith signal frame. The method may further include performing forward error correction encoding on first n signal frames, to obtain forward error correction encoded results corresponding to the first n signal frames. The first n signal frames may be signal frames located before the ith signal frame. The method may further include synthesizing the encoded result of the ith signal frame and the forward error correction encoded results corresponding to the first n signal frames, to obtain an ith encoded frame corresponding to the ith signal frame. The ith encoded frame may comprise a flag bit, the flag bit may be for indicating a number n, and n may be a positive integer greater than or equal to 2.