Dynamic EVS and AMR Codec Selection for Wireless Power Efficiency

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Solution Overview

Problem

The increasing processing requirements in wireless communication systems, driven by new features and technologies, often lead to higher battery usage without significant user experience benefits, making codec selection challenging to balance sound quality, delay, processing demands, and energy consumption.

Innovation Solution

Implementing techniques to dynamically select between EVS and AMR codecs based on link quality indicators, using EVS in poor link conditions for improved sound quality and EVS IO AMR in good link conditions to conserve battery power, thereby optimizing power efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If EVS codec is used to improve sound quality and compression efficiency, then audio quality is improved, but energy consumption increases

Engineering Contradiction:

Improvesound qualityVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements dynamic codec selection that adapts between EVS and AMR based on real-time link quality conditions. The system transitions from static codec assignment to dynamic adaptation, selecting EVS when link quality is poor to maximize audio quality, and switching to AMR when link quality is good to conserve energy.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operational parameters by monitoring link quality indicators and adjusting codec selection accordingly. This parameter-based adaptation allows the system to optimize the trade-off between audio quality and energy consumption based on current communication conditions.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If newer codecs with better compression efficiency are adopted, then compression efficiency is improved, but processing requirements increase

Engineering Contradiction:

Improvecompression efficiencyVSAvoidprocessing requirements

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent applies partial action by using the more complex EVS codec only when necessary (poor link quality) rather than always. When link quality is good, the system uses the simpler AMR codec, thus avoiding excessive processing requirements while still obtaining the benefits of EVS when needed.

Inventive Principle:

Principle #16Partial or excessive action

3Use of energy by moving object

If codec selection is optimized for power efficiency, then energy consumption is reduced, but adaptability to different link conditions decreases

Engineering Contradiction:

Improveenergy consumptionVSAvoidadaptability to link conditions

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The patent implements a feedback mechanism that continuously monitors link quality indicators and uses this information to dynamically adjust codec selection. This closed-loop approach ensures the system adapts to changing link conditions while optimizing energy consumption based on actual performance requirements.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10645228B2Adaptability in EVS codec to improve power efficiency

Publication Date: 2020.05.05 APPLE INC

AI summary

This disclosure relates to techniques for codec selection for voice calls. A wireless device may initiate a voice call and may determine one or more link quality indicators. Based at least in part on the one or more link quality indicators, the wireless device may select a codec for the voice call.