Multi-Speaker Audio Casting With Automatic Channel Assignment
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Solution Overview
Problem
Smartphones are limited to one or two wireless speaker connections, restricting surround sound and multi-room sound output capabilities.
Innovation Solution
A method and system for casting audio signals to multiple wireless speakers, involving a casting device that sends test signals to each speaker, receives feedback from a remote control's microphone, and selects channels based on speaker characteristics like frequency range and time delay to optimize sound distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a smartphone connects to multiple wireless speakers, then surround sound and multi-room sound output capability is improved, but device complexity and connection management become more complex
Solution Approach 1:
The system automatically performs speaker detection, channel assignment, and audio routing without requiring manual user configuration. The casting device autonomously manages multiple speaker connections, dynamically assigns audio channels based on speaker characteristics, and handles connection establishment and termination, thereby resolving the complexity of managing multiple wireless speaker connections.
2Manufacturing precision
If audio channels are distributed to multiple speakers based on speaker characteristics, then sound quality is improved, but measurement and detection complexity increases
Solution Approach 1:
The system performs preliminary detection of speaker characteristics (frequency response, spatial position, audio capabilities) during the connection establishment phase. This advance measurement allows the casting device to pre-configure optimal channel assignments before audio playback begins, ensuring high sound quality without requiring complex real-time measurements during operation.
3Measurement precision
If test signals are sent to each speaker and feedback is received, then channel selection accuracy is improved, but time consumption increases
Solution Approach 1:
The system implements periodic or sequential test signal transmission to each connected speaker, with automated feedback reception and processing. This structured approach efficiently collects speaker characteristic data through rapid successive measurements, enabling accurate channel selection while minimizing the total setup time through systematic signal sequencing.
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 high-quality surround sound and multi-room audio by effectively distributing audio channels to multiple speakers, improving sound quality and flexibility in speaker placement.
Implementation Method 1
receive information from a microphone for each of the one or more test signals output from each of the plurality of speakers
Data Source
AI summary
A method for casting to multiple wireless speakers, the method including: receiving at a casting device a request from a user device to cast audio signals to multiple wireless speakers, wherein the audio signals include multiple channels; sending an inquiry request; receiving responses to the inquiry request from multiple wireless speakers; connecting to a plurality of speakers from the multiple wireless speakers; sending test signals to each of the plurality of speakers; receiving information from a microphone for each of the one or more test signals output from each of the plurality of speakers, wherein the microphone is a component of a remote control associated with the casting device; selecting one or more of the multiple channels to send to each of the plurality of speakers based on the received information; and sending the corresponding selected one or more of the multiple channels to each of the plurality of speakers.