Mobile Audio Equalizer Modes for Roaming Speech Quality
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Solution Overview
Problem
Mobile communication devices lack user interface functionality to adjust tone color according to individual preferences, especially when roaming in foreign networks, where different countries have distinct sound preferences, leading to suboptimal telephone speech quality.
Innovation Solution
A mobile communication device with a user interface that includes an equalizer setting menu, allowing users to adjust frequency-specific gains and store country-specific equalizer settings, enabling optimization of tone color for various countries and automatic roaming environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tone color is uniformly set by providers or according to GCF standard, then telephone speech quality is optimized for network status, but users cannot adjust tone color according to personal preferences
Solution Approach 1:
The equalizer settings are made dynamic and adjustable by users through a graphical user interface. Users can modify frequency-specific gains for different bands (e.g., 60Hz, 250Hz, 1kHz, 4kHz) according to their personal preferences, transforming the static provider-set equalizer into a dynamic user-configurable system while maintaining network optimization as a baseline
Solution Approach 2:
The system allows users to change the parameters of equalizer settings (frequency-specific gains) directly. Users can adjust the gain values for different frequency bands to alter tone color characteristics, enabling personalization while the system maintains the ability to revert to or combine with network-optimized settings
2Reliability
If the equalizer setting is fixed to domestic network environments, then domestic telephone speech quality is optimized, but the equalizer cannot optimize tone color for foreign networks during automatic roaming
Solution Approach 1:
The system implements country-specific equalizer settings tailored to local preferences. Different countries have pre-configured equalizer profiles (e.g., China emphasizes high frequencies for clarity, Europe balances mid-range for warmth, USA focuses on low-end for power). When roaming, the system automatically detects the current country and applies the appropriate local equalizer settings, optimizing speech quality for each region
Solution Approach 2:
The system pre-configures equalizer settings for multiple countries before roaming occurs. During automatic roaming, the system proactively detects the current country and automatically switches to the pre-configured local equalizer profile, eliminating the need for manual user adjustment and ensuring immediate optimization for the foreign network environment
3Adaptability or versatility
If a user interface for equalizer adjustment is added, then user preference customization is enabled, but device complexity increases
Solution Approach 1:
The system uses pre-configured equalizer templates for different countries and scenarios. Instead of requiring users to create complex settings from scratch, the system provides ready-made profiles that users can select or lightly customize, reducing the perceived complexity while maintaining full adjustment capabilities
Solution Approach 2:
The equalizer adjustment interface is segmented into discrete frequency bands with individual controls. Users can adjust each band independently (60Hz, 250Hz, 1kHz, 4kHz, etc.) rather than dealing with a monolithic complex setting, making the interface more manageable and intuitive while preserving detailed control capability
Data Source
AI summary
A mobile communication device and a method of setting tone color, which allow a user to set the tone color of received sound. Provided are a normal mode, which sets the equalizer using GCF standards stored in an internal memory or equalizer setting values selected by a provider, a country-specific mode, which uses country-specific setting, and a user mode, in which a user can set frequency-specific gains of the received sound, and one mode is selected from the provided mode, so that the tone color of the received sound can be adjusted according to the selection. Telephone speech quality can be optimized for user preference, network environments and language characteristics.