Dynamic Voice Codec Translation for EVS Compatibility
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Solution Overview
Problem
Conventional networks downgrade voice services when communicating between devices, one capable of EVS and the other not, resulting in reduced audio bandwidth and bitrate, failing to utilize the higher capabilities of EVS-capable devices.
Innovation Solution
Implementing a dynamic voice codec translation mechanism within the IMS network that allows EVS-capable devices to maintain their capabilities while translating communications to match the lower capabilities of non-EVS devices, ensuring seamless communication without downgrading the service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the network downgrades voice service to match non-EVS device capabilities, then communication compatibility is improved, but audio bandwidth and bitrate are reduced
Solution Approach 1:
The patent introduces an intermediary translation mechanism within the IMS network that converts EVS-encoded audio streams into formats compatible with non-EVS devices. This mediator enables high-quality EVS communication between capable devices while automatically translating to lower-capability formats when necessary, thus maintaining both compatibility and audio quality without mutual degradation
Solution Approach 2:
The system dynamically adjusts the voice service configuration based on real-time device capability detection. When an EVS-capable device communicates with a non-EVS device, the network dynamically translates the service format. When both devices are EVS-capable, the system dynamically maintains high-quality EVS encoding, avoiding static downgrading and enabling adaptive quality adjustment
2Quantity of substance
If the network maintains EVS service quality for EVS-capable devices, then audio bandwidth and bitrate are preserved, but communication compatibility with non-EVS devices deteriorates
Solution Approach 1:
The translation mechanism acts as an intelligent intermediary that preserves EVS quality for capable devices while automatically adapting to non-EVS devices. The system detects device capabilities and applies format translation only when necessary, allowing EVS-capable devices to maintain full audio quality without manual configuration or compatibility issues
Solution Approach 2:
The system applies different quality levels locally based on device capabilities. EVS-capable devices receive full-quality EVS encoding with 50Hz-20kHz bandwidth, while non-EVS devices receive appropriately formatted lower-capability streams. This localized quality adjustment ensures each device receives optimal service without forcing universal downgrading
3Adaptability or versatility
If conventional networks use fixed rate coding, then device compatibility is improved, but speech quality at the same average bitrate is reduced compared to variable bit-rate adaptation
Solution Approach 1:
The patent implements source-controlled variable bit-rate (VBR) adaptation for EVS encoding, allowing the bitrate to dynamically adjust based on speech characteristics and network conditions. This VBR approach maintains compatibility through proper format selection while achieving superior speech quality at the same average bitrate compared to fixed rate coding, as the encoder allocates bits efficiently based on actual speech content requirements
Data Source
AI summary
Technologies for network configuration using dynamic voice codec and feature offering are described herein. A translation codec is used to allow a device capable of using enhanced voice services to use the enhanced voice services when communicating with a device that is not capable of using enhanced voice services.