Multi-Channel Sound Collection for Far-Field Voice
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Solution Overview
Problem
Existing sound collection devices for far-field voice interaction have high hardware development costs and performance issues, making them unsuitable for general household or low-cost devices.
Innovation Solution
A sound collection apparatus comprising a multi-channel analog sound receiver, a first analog-to-digital converter, and an interface controller, which converts sound signals into digital signals for processing, reducing hardware costs and complexity while maintaining performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing sound collection structures are used for far-field voice interaction, then voice acquisition capability is achieved, but hardware development cost is high and performance is low
Solution Approach 1:
The patent divides the sound collection system into multiple independent channels, each with its own signal processing path. The multi-channel structure allows parallel processing of audio signals from different spatial locations, improving far-field voice capture capability while keeping each channel's hardware requirements moderate and cost-effective.
Solution Approach 2:
The patent transitions from traditional single-channel or stereo sound collection to multi-channel spatial audio architecture. By adding spatial dimensionality through multiple microphones arranged in specific geometries, the system achieves superior far-field voice performance without proportionally increasing hardware cost, as the additional channels use cost-effective microphone elements.
2Measurement precision
If complex sound collection structures are implemented to improve performance, then voice acquisition capability increases, but device complexity and development difficulty increase
Solution Approach 1:
The patent designs a multi-channel sound collection apparatus that serves multiple functions: far-field voice capture, near-field voice capture, spatial audio processing, and noise suppression. This universal design achieves high voice acquisition capability across different scenarios without requiring separate specialized hardware for each function, thereby reducing overall development complexity.
Solution Approach 2:
The patent introduces digital signal processing algorithms as intermediaries that process raw audio signals from multiple channels. These algorithms perform beamforming, noise suppression, and voice enhancement, achieving high measurement precision for voice acquisition while keeping the physical hardware structure relatively simple and manageable.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus effectively reduces hardware costs and development difficulties while ensuring high performance, enabling efficient voice data acquisition and processing for smart devices.
Implementation Method 1
a multi-channel analog sound receiver configured to convert an obtained sound signal into an electrical signal
Data Source
AI summary
A sound collection apparatus for far-field voice includes a multi-channel analog sound receiver configured to convert an obtained sound signal into an electrical signal; a first analog-to-digital converter coupled to the multi-channel analog sound receiver and configured to convert the electrical signal into a digital signal; and an interface controller coupled to the analog-to-digital converter and configured to transmit the digital signal to a control device via a preset interface. Using the above solutions, the technical problems of high hardware cost and unguaranteed performance of existing sound collection devices can be solved, and the technical effects of effectively reducing the hardware cost and the difficulties of development are achieved.