Audio Transmission Device Frequency Band Signal Separation
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Solution Overview
Problem
Multi-channel audio signal transmission in sound bars faces challenges such as channel interference and increased costs due to the need for multiple wireless modules, which complicates effective wireless transmission of stereophonic sounds.
Innovation Solution
A transmission device separates audio signals into high-pass and low-pass signals based on frequency bands, mixes these signals with woofer channel signals, and transmits them to a reception device, which then separates and outputs the signals to corresponding speakers, minimizing signal loss and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If more wireless modules are included to increase the number of wireless transmission channels, then the number of transmission channels increases, but channel interference is generated and cost increases
Solution Approach 1:
The patent segments the multi-channel audio signals into different frequency bands (high-pass and low-pass signals) and transmits them through a reduced number of wireless channels. By dividing the signal content across frequency domains rather than spatial channels, the system achieves multiple transmission channels using fewer physical wireless modules, thereby reducing channel interference while maintaining the ability to reproduce multi-channel audio.
2Quantity of substance
If more wireless modules are included to increase the number of wireless transmission channels, then the number of transmission channels increases, but the cost increases
Solution Approach 1:
The patent makes existing wireless modules perform multiple functions by transmitting both high-pass and low-pass audio signals through the same wireless channel. Instead of requiring separate wireless modules for different audio channels, the system enables each wireless module to carry multiple signal types simultaneously, reducing the total number of modules needed and thereby lowering manufacturing cost while maintaining multi-channel transmission capability.
3Device complexity
If audio signals are transmitted through fewer wireless channels, then the number of wireless modules is reduced, but signal loss and deformation increase
Solution Approach 1:
The patent changes the frequency domain parameters of the audio signals by separating them into high-pass and low-pass bands before transmission. This parameter transformation allows the signals to be transmitted through fewer channels with reduced interference, and the reception device reconstructs the original multi-channel audio by recombining these frequency-separated signals, thereby maintaining signal quality while reducing the number of wireless modules required.
Data Source
AI summary
Disclosed are a transmission device, a reception device, and a control method. The transmission device comprises: a communication interface comprising circuitry and at least one processor, comprising processing circuitry, wherein at least one processor, individually and/or collectively, is configured to: from among audio signals of a plurality of channels including a left channel, a sub-left channel, a right channel, a sub-right channel, and a woofer channel, separates the audio signals of the sub-left channel and the sub-right channel into a high-pass audio signal and a low-pass audio signal, respectively, on the basis of a frequency band; mixes the high-pass audio signal of the sub-left channel and the high-pass audio signal of the sub-right channel with the audio signal of the woofer channel; mixes the low-pass audio signal of the sub-left channel with the audio signal of the left channel; mixes the low-pass audio signal of the sub-right channel with the audio signal of the right channel; and control the communication interface to transmit the audio signals of the mixed woofer channel, the mixed left channel, and the mixed right channel to the reception device.