True Wireless Stereo Earbud Recording With Collaborative Noise Reduction
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Solution Overview
Problem
Existing wired earphones and dedicated recording accessories for mobile devices are cumbersome and limit user activity due to their size, which affects performance indicators like sensitivity and bandwidth, and wired connections restrict mobility during recording.
Innovation Solution
True wireless stereo earbuds with wireless communication capabilities for recording, allowing single-earbud or dual-earbud operations, including PCM format conversion, noise reduction, and collaborative recording with mobile terminals to enhance audio quality and reduce bandwidth and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wired earphone or dedicated recording accessory is connected to the mobile phone, then audio recording quality is improved, but user mobility is limited due to cable length restrictions
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless Bluetooth communication system. The earbud transmits audio signals wirelessly to the mobile phone, eliminating the physical cable that restricts user movement while maintaining audio recording functionality.
Solution Approach 2:
The patent introduces a dedicated recording accessory as an intermediary device that bridges the earbud and mobile phone. This accessory processes audio signals and transmits them via Bluetooth, enabling high-quality recording without direct wired connection between the earbud and phone.
2Measurement precision
If a dedicated recording accessory with large size is used, then performance indicators such as sensitivity and bandwidth are improved, but portability is reduced
Solution Approach 1:
The patent makes the earbud itself multi-functional by integrating recording capabilities directly into it. The earbud serves both as an audio playback device and a recording device, eliminating the need for a separate dedicated recording accessory and its associated bulk.
Solution Approach 2:
The patent merges the functions of the earbud and recording accessory into a single integrated unit. The earbud's microphone and processing capabilities are combined with its audio playback function, creating a compact device that provides both listening and recording capabilities without requiring additional large-sized accessories.
3Measurement precision
If dual-earbud recording is used, then audio quality is improved, but Bluetooth bandwidth consumption increases
Solution Approach 1:
The patent implements a flexible recording mode that can operate with a single earbud when needed. This partial action approach allows the system to use only the necessary resources (one earbud's audio signal) rather than requiring both earbuds to be active, thereby reducing Bluetooth bandwidth consumption while maintaining acceptable audio quality for many applications.
Data Source
AI summary
In this application, by using a method for collaborative recording by using a mobile terminal and the true wireless stereo earbud, recording with more complete data amount can be collected, and cooperative noise reduction is performed on a recording signal collected by the mobile terminal and a recording signal collected by the true wireless stereo earbud, so that accuracy and integrity of a human voice signal obtained through separation are higher. Further, in this application, when the true wireless stereo earbud performs recoding in a mode of single-earbud recording, a data amount of the true wireless stereo earbud is relatively small. Therefore, when the mobile terminal receives, through Bluetooth, data sent by the true wireless stereo earbud, excessive occupation of Bluetooth bandwidth of the mobile terminal is avoided, and power consumption of a mobile phone is reduced.