Wireless Earphone Channel Coordination via Sideband Signals
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Solution Overview
Problem
Current wireless earphone systems require manual intervention to change channels when the selected channel becomes occupied, leading to interference and deterring their use.
Innovation Solution
A wireless earphone system with a frequency modulation transmitter (FMT) block and receiver (FMR) that automatically tunes to a vacant channel using radio data system (RDS) and audio encryption/decryption capabilities, allowing real-time channel switching without user intervention, utilizing sideband digital signals to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual channel changing is implemented, then user control over channel selection is improved, but ease of operation deteriorates due to multiple steps required
Solution Approach 1:
The system performs automatic channel scanning and coordination between transmitter and receiver without requiring user intervention. The microprocessor automatically scans for available channels, determines the best channel, and coordinates the switch between transmitter and receiver, allowing the device to serve itself rather than requiring manual operation
Solution Approach 2:
The system performs preliminary channel scanning and coordination actions before the user needs to use the device. By pre-scanning for available channels and pre-coordinating between transmitter and receiver, the system eliminates the need for manual channel changing during actual use, improving ease of operation
2Productivity
If automatic channel scanning is implemented, then productivity is improved by reducing tuning time, but use of energy increases due to continuous scanning
Solution Approach 1:
Instead of continuous scanning, the system performs channel scanning periodically or only when necessary (e.g., when no signal is detected or when transitioning between locations). This periodic approach maintains productivity by quickly establishing connection while reducing energy consumption by keeping the scanner inactive during stable operation
3Ease of operation
If FM broadcast channels are used for wireless earphones, then ease of operation is improved, but object-affected harmful factors increase due to channel interference
Solution Approach 1:
The system continuously monitors the quality of the received signal and provides feedback to the control logic. When interference or signal degradation is detected, the system automatically initiates a channel scan to find a better channel, creating a closed-loop feedback system that maintains ease of operation while actively managing and reducing interference effects
Solution Approach 2:
The system uses an intermediary coordination mechanism between the transmitter and receiver that automatically manages channel selection. This intermediary control system scans for available channels, selects the optimal channel, and coordinates the switch between transmitter and receiver, eliminating the need for manual intervention while protecting against interference
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables seamless and transparent audio signal reception by automatically finding and switching to available channels, reducing user effort and minimizing interference, while maintaining audio security through encryption.
Implementation Method 1
Low-power frequency modulation (FM) transmission in the FM broadcast channels
Implementation Method 2
a FM receiver (FMR) with radio data system (RDS or RDBS) and audio decryption
Data Source
AI summary
A method of the present invention includes coordinating tuning to the same channel of a radio band wherein the following steps are performed: tuning to a channel, within a radio band, that uses a side band; receiving control information in the side band of the channel; and processing the received audio information in the channel using the control information.