Voice Signal Processing with Auxiliary Noise Detection
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Solution Overview
Problem
Existing voice recognition systems using Bluetooth headsets are vulnerable to ambient noise and cannot perform additional software post-processing due to mono channel information transmission, leading to inaccurate voice recognition and erroneous operations.
Innovation Solution
A voice signal processing apparatus that includes an input unit, a detecting unit, and a signal processing unit to transmit a voice signal and an auxiliary signal to an external terminal using the same or different protocols, with the auxiliary signal detected through in-ear or bone conduction microphones, motion sensors, or gyro sensors, enhancing voice recognition accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal processing is performed on the voice signal to remove ambient noise, then the voice signal quality is improved, but additional post processing by software cannot be performed because only mono channel information is transmitted
Solution Approach 1:
The patent segments the transmitted information into multiple channels: primary voice signal channel and auxiliary signal channel. The auxiliary channel carries additional information (noise levels, voice activity detection, spectral features) that enables software post-processing while the primary channel maintains voice quality through signal processing.
Solution Approach 2:
The patent adds an additional dimension to the transmitted data by introducing auxiliary signals that provide multi-dimensional information about the acoustic environment (noise characteristics, voice presence, spectral distribution), enabling software to perform post-processing analysis without degrading the primary voice signal quality.
2Ease of operation
If the voice of the other party is input to the microphone as it is, then the communication is simple, but it may cause an erroneous operation of a voice recognizing function
Solution Approach 1:
The patent performs preliminary analysis of the incoming voice signal by detecting auxiliary characteristics (noise levels, voice activity, spectral features) before the voice recognition process. This preliminary action allows the system to identify and exclude segments containing only ambient noise or other party's voice, preventing erroneous voice recognition operations while maintaining simple communication.
3Ease of operation
If a Bluetooth headset is used to transmit voice, then the user convenience is improved, but the system is vulnerable to ambient noise and cannot perform additional software post-processing
Solution Approach 1:
The patent segments the Bluetooth transmission into multiple functional channels: a primary audio channel for voice transmission and an auxiliary channel for environmental information. This segmentation allows the Bluetooth headset to maintain user convenience while providing sufficient data for software-based noise filtering and voice recognition enhancement.
Solution Approach 2:
The auxiliary signal acts as an intermediary that carries environmental context information (noise characteristics, voice activity) from the headset to the external terminal. This intermediary enables the software to perform post-processing noise removal and voice activity detection without requiring hardware modifications to the Bluetooth headset.
Data Source
AI summary
A voice signal processing apparatus includes: an input unit which receives a voice signal of a user; a detecting unit which detects an auxiliary signal; and a signal processing unit which transmits the voice signal to an external terminal in a first operation mode and transmits the voice signal and the auxiliary signal to the external terminal using the same or different protocols in a second operation mode.