Dual-Microphone Headset Noise Reduction via Terminal Chip Relocation
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Solution Overview
Problem
Dual-microphone headsets struggle to perform noise reduction processing during calls due to the high cost of noise reduction chips, making it difficult to improve call quality and facilitate popularization.
Innovation Solution
A dual-microphone headset design where the first microphone acquires a call voice and background noise, and the second microphone acquires background noise, with the noise reduction chip located in the external terminal, allowing for noise reduction processing by transmitting the signals through an external plug, thereby eliminating the need for an additional noise reduction chip on the headset.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a noise reduction chip is disposed in the headset to perform noise reduction processing, then call quality is improved, but the cost of the entire headset becomes excessively high
Solution Approach 1:
The noise reduction chip is extracted from the headset and relocated to the mobile phone. The headset retains only the dual microphones and transmission components, while the noise reduction processing function is moved to the mobile phone's existing resources, thereby reducing headset cost while maintaining call quality improvement
Solution Approach 2:
The mobile phone's processor or existing audio processing capabilities are utilized to perform noise reduction processing, making the mobile phone serve multiple functions including noise reduction. This eliminates the need for a dedicated noise reduction chip in the headset, reducing cost while maintaining the noise reduction capability
2Device complexity
If only one MIC is disposed on the headset, then headset structure is simplified, but noise reduction processing cannot be performed independently
Solution Approach 1:
The headset's microphone system is merged with the mobile phone's processing system. The dual microphones in the headset capture both call voice and background noise, and this signal is combined with the mobile phone's processor to perform noise reduction processing, achieving both structural simplicity and noise reduction capability
3Reliability
If dual MICs are disposed on the mobile phone body, then noise reduction processing can be performed, but the headset cannot independently acquire background noise when used for calls
Solution Approach 1:
The noise acquisition function is segmented between the headset and mobile phone. The headset's dual microphones are positioned to capture both call voice and background noise separately, and this segmented signal transmission to the mobile phone enables the headset to independently acquire background noise when used for calls
Data Source
AI summary
The present invention discloses a headset, a terminal, and a method for processing an audio signal based on the headset and the terminal. The method for processing an audio signal includes: acquiring, by a first microphone of a headset in a call process, a first audio signal including a call voice and background noise, and acquiring, by a second microphone of the headset in the call process, a second audio signal including the background noise; and transmitting, by using an external plug of the headset, the first audio signal and the second audio signal to a noise reduction chip built in a terminal, so that the noise reduction chip performs noise reduction processing on the first audio signal according to the second audio signal.