Dual-Speaker Channel Pairing Using Beamformed Position Detection
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Solution Overview
Problem
Users are unsure about which smart speaker outputs audio signals for the left or right channel in dual channel setups, leading to confusion and inefficiency in pairing.
Innovation Solution
A method that determines the relative positions of two audio playback devices and a mobile device using beamforming technology, defining an available area for dual channel experience, and pairing the audio signals accordingly based on these positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If automatic channel pairing is implemented, then pairing efficiency is improved, but device complexity increases due to position detection requirements
Solution Approach 1:
The system performs self-positioning and automatic channel pairing without user intervention. The first and second playback devices automatically detect their relative positions through audio signal exchange and beamforming, then autonomously determine channel correspondence relationships and complete pairing, eliminating the need for manual configuration.
Solution Approach 2:
The patent replaces manual pairing operations with acoustic field-based position detection. Instead of mechanical or manual configuration methods, the system uses audio signal transmission, reception, and beamforming technology to automatically determine spatial relationships and establish channel pairings.
2Ease of operation
If position-based automatic pairing is used, then ease of operation is improved, but measurement precision requirements increase for accurate channel assignment
Solution Approach 1:
The system employs bidirectional audio signal transmission and reception with feedback mechanisms. The first playback device sends test audio signals to the second device, which receives and processes them through beamforming, then feedback information about signal strength and position is used to iteratively refine position detection accuracy and confirm channel pairing.
Solution Approach 2:
The patent utilizes changes in audio signal parameters (such as signal strength, phase, and frequency characteristics) as the playback devices move or are positioned differently. By monitoring these parameter variations, the system can accurately determine relative positions and adjust channel assignments accordingly, maintaining precision across different spatial configurations.
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
Automatically pairs dual channels by determining the mobile device's position within the available area, ensuring correct channel assignment and improving pairing convenience.
Implementation Method 1
the third position relation is determined based on the power obtained by one of the two audio playback devices and the mobile device receiving a test audio signal played by another one of the two audio playback devices and the mobile device through the beamforming technology
Data Source
AI summary
A pairing method of dual channel and a mobile device are provided. In the method, an available area is defined according to a first position relation between two audio playback devices and a reference target. A second position relation between the mobile device and the available area is determined. A first corresponding relation between the two audio playback devices and audio signals of the left channel and the right channel is determined according to the second position relation. The audio signals of the left channel and the right channel are played by the two audio playback devices respectively according to the first corresponding relation. Accordingly, the existing problem that the dual channel could not be distinguished may be solved.