Audio Receiver Automatic Channel Selection via Signal Correlation
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Solution Overview
Problem
Existing audio receiving devices in sound systems, such as hearing aids and listening devices, face inefficiencies in changing wireless communication channels, often requiring manual pushbutton operation or external devices, which can be time-consuming and inconvenient, especially in scenarios like classroom amplification systems.
Innovation Solution
An Automatic Channel Finder algorithm is introduced, which uses a wireless receiver and microphone to analyze signals for correlation, automatically switching between predefined channels until an active channel with matching signal characteristics is found, allowing for efficient channel selection without the need for external devices or manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual pushbutton operation or external devices are used for channel selection, then channel changing functionality is achieved, but time consumption and operational complexity increase
Solution Approach 1:
The audio receiving device automatically performs channel scanning and selection by comparing received wireless signals with acoustic environment signals, eliminating the need for manual user intervention or external programming devices. The device serves itself by autonomously identifying the appropriate transmission channel through signal correlation analysis.
Solution Approach 2:
The system performs preliminary channel scanning and signal correlation analysis automatically when a transmission channel is not yet established. By pre-scanning available channels and comparing signals before full communication begins, the system prepares the optimal channel in advance, reducing the time needed for channel establishment.
2Productivity
If automatic channel scanning is implemented, then channel selection speed improves, but device complexity increases
Solution Approach 1:
The audio receiving device utilizes its existing microphone and signal processing capabilities for dual purposes: normal acoustic signal reception and channel identification. By making the existing components multi-functional, the system achieves automatic channel scanning without adding dedicated hardware, thus limiting the increase in device complexity.
Solution Approach 2:
The system employs feedback by continuously comparing the wireless received signal with the acoustic environment signal to determine correlation. This feedback mechanism allows the device to automatically adjust channel selection based on signal quality, improving channel selection speed while using existing processing resources efficiently.
3Measurement precision
If correlation analysis between received signal and acoustic signal is performed, then channel identification accuracy improves, but processing requirements increase
Solution Approach 1:
The system performs correlation analysis selectively rather than continuously - only when establishing or changing transmission channels. By applying the processing intensity partially (only when needed) rather than excessively (continuously), the system achieves high identification accuracy while managing energy consumption during normal operation.
Data Source
AI summary
A method of identifies an appropriate wireless communication channel in an audio receiving device, that comprises 1) a wireless receiver receiving an audio signal on a particular transmission channel selected among a predefined number of possible transmission channels, and 2) a microphone for picking up a sound in the environment of the audio receiving device. The method comprises a) selecting a channel as the receiving channel among a predefined number of possible transmission channels; b) analyzing the received signal received and the signal picked up by the microphone; c) determining whether a predefined criterion concerning the degree of similarity of the received signal and the signal picked up by the microphone is fulfilled; d) KEEPING the channel as the receiving channel, if the predefined criterion is fulfilled; and e) CHANGING the receiving channel to another channel if the predefined criterion is NOT fulfilled.