Voice Encoder Layer Segmentation for Error Resilience
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional voice communication systems experience significant quality deterioration in reproduced voice when transmission errors exceed 7%, particularly due to the lack of error protection for certain bits and the limited capability of weak error correction codes.
Innovation Solution
A voice communication system that classifies voice information bits into core and extension layers based on auditory importance, with error detection and correction encoding applied to the core layer and optional encoding for the extension layer, allowing flexible decoding modes based on error frequency to minimize quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If error correction encoding is applied to all voice information bits, then transmission reliability is improved, but device complexity and processing overhead increase
Solution Approach 1:
The voice information bits are segmented into two distinct groups: important bits (affecting sound quality) and less important bits (affecting naturalness). Error correction encoding is selectively applied only to the important bits, thereby improving transmission reliability for critical information while avoiding the complexity of encoding all bits.
Solution Approach 2:
Different error protection strategies are applied to different portions of the voice information based on their importance. The important bits receive strong error correction encoding while less important bits are transmitted without such encoding, optimizing the balance between reliability and complexity.
2Productivity
If error correction encoding is applied to important bits only, then processing overhead is reduced, but transmission reliability for less important bits deteriorates
Solution Approach 1:
The patent applies differentiated error protection: strong error correction encoding for important bits (maintaining reliability where it matters most) and no error correction for less important bits (improving processing efficiency). This local quality approach ensures that processing overhead is reduced while reliability is maintained for critical voice information.
3Device complexity
If voice information is transmitted without error protection, then device complexity is minimized, but quality deterioration occurs when transmission errors exceed 7%
Solution Approach 1:
Voice information bits are segmented into important and less important categories. Error correction encoding is applied selectively to important bits, providing adequate protection against transmission errors without the complexity of encoding all bits. This segmentation allows the system to maintain simplicity while achieving acceptable reliability for critical voice quality parameters.
Solution Approach 2:
The patent changes the parameter of error protection coverage from 100% (all bits) to a selective percentage (only important bits). This parameter change reduces device complexity and processing overhead while maintaining sufficient reliability for voice quality, avoiding the 7% error threshold problem for critical information.
Data Source
AI summary
A voice communication system is equipped with a voice encoder which classifies respective bits of a voice information bit string in accordance with the degree of importance which is the magnitude of auditory influence when there is an error therein, classifies a group of bits which are high in degree of importance into a core layer and classifies a group of bits which are not high into an extension layer and a voice decoder which decodes a voice by using the bit strings in both of the core layer and the extension layer on the basis of frequency that the error is detected by error detection processing and when the frequency is low and decodes the voice using all bits or only some bets in the core layer when the frequency is high.