Audio Device Microcontroller Voice Control via USB
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Solution Overview
Problem
Existing solutions for human-machine interaction during vehicle driving, such as voice control systems, often require high-performance processors and dedicated power supplies, making them costly and inefficient, and do not fully address the need for hands-free operation of mobile devices for tasks like navigation and communication.
Innovation Solution
An audio device with multiple microphones connected to a computing terminal, where the microcontroller encodes audio signals and transfers them for processing, allowing for voice-controlled operations without the need for high-processing power locally, and includes a charging function to reduce hardware complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a stand-alone voice recognition device is provided, then voice control functionality is achieved, but the cost increases due to high-performance processor and communication module requirements
Solution Approach 1:
The patent extracts the voice recognition processing function from a stand-alone device and relocates it to the mobile phone's existing processor. Only the microphone array and basic audio encoding hardware are kept in the car device, while the computationally intensive voice recognition tasks are performed by the mobile phone's CPU or NPU, eliminating the need for expensive dedicated voice recognition hardware in the car.
Solution Approach 2:
The patent leverages the mobile phone's existing multi-functional capabilities (processor, communication modules, display, speakers) to perform voice recognition and provide feedback. The mobile phone serves multiple purposes: audio processing, voice recognition, result display, and audio output, replacing the need for dedicated single-function hardware components.
2Extent of automation
If a stand-alone voice recognition device is provided, then voice control is enabled, but the device requires a dedicated power supply which is not always available in the vehicle
Solution Approach 1:
The patent merges the power supply of the voice recognition system with the mobile phone's existing power system. The audio device in the car is powered through the USB connection from the mobile phone, eliminating the need for a separate power supply circuitry in the car device. This approach utilizes the mobile phone's battery and power management capabilities to supply power to the microphone array and processing components.
3Measurement precision
If high-performance embedded hardware is used for voice recognition, then recognition accuracy is improved, but the hardware cost and processing power requirements increase significantly
Solution Approach 1:
The patent introduces an audio encoding intermediary that processes raw microphone signals into compressed audio data streams before transmission to the mobile phone. This intermediary layer performs basic noise filtering and audio compression, improving the quality of data transmitted to the mobile phone for voice recognition while avoiding the need for high-performance embedded processing hardware in the car device.
Data Source
AI summary
The present disclosure provides an audio device and an audio processing method based on the charger cable. The audio device includes: at least two microphones configured to collect audio signals; and a microcontroller configured to, process the audio signals collected by the at least two microphones to generate one data stream; and when the audio device is connected to a computing terminal, send the data stream to the computing terminal, the data stream being further processed by the computing terminal to perform an action. Each of the at least two microphones is respectively connected to the microcontroller.