Unified STFT Spectral Masking for Speech and RF Noise Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solutions for noise and interference in radio and speech systems increase hardware footprint, computational cost, and lack a unified approach for both domains, leading to performance tradeoffs and increased production costs.
Innovation Solution
A single device uses spectral masks based on Short Time Fourier Transform (STFT) to mitigate noise in both speech and radio signals, applying a unified hardware solution that reuses the same hardware for both domains without performance tradeoffs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are used for noise cancellation in radio and speech systems, then noise mitigation performance is improved, but hardware footprint and cost increase
Solution Approach 1:
The patent combines separate noise cancellation devices for radio and speech systems into a single unified device. The processing circuitry integrates multiple noise mitigation functions that previously required distinct hardware components, thereby reducing hardware footprint while maintaining noise mitigation performance for both radio-frequency and speech signals
Solution Approach 2:
The unified device is designed with multi-functional processing circuitry that can handle both radio signal noise cancellation and speech signal enhancement. The same processing circuitry adapts to perform different noise mitigation tasks depending on the input signal type, eliminating the need for dedicated separate devices and reducing overall hardware requirements
2Reliability
If separate devices are used for noise cancellation in radio and speech systems, then domain-specific performance is improved, but device complexity increases
Solution Approach 1:
The processing circuitry is designed as a universal platform that can handle both radio and speech signal processing. The same circuitry dynamically adapts its processing algorithms based on the input signal type, maintaining domain-specific performance while avoiding the complexity of having separate dedicated devices for each function
Solution Approach 2:
The device incorporates dynamic signal classification and adaptive processing capabilities. The processing circuitry automatically identifies whether the input is a radio or speech signal and adjusts its noise cancellation parameters accordingly, allowing a single device to maintain optimal performance across different domains without requiring static separate hardware configurations
3Reliability
If separate devices are used for noise cancellation in radio and speech systems, then specialized processing is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple specialized noise cancellation functions into a single manufacturable device. By integrating radio signal processing and speech signal enhancement into one unified hardware platform, the patent reduces the number of components that need to be manufactured, assembled, and tested, thereby lowering production costs while maintaining specialized processing capabilities through software-defined functionality
Data Source
AI summary
This disclosure describes systems, methods, and devices related to reducing noise in and improving speech signals and radio signals. A device may identify a radio frequency signal received by radio frequency circuity at a time; apply a Short Time Fourier Transform (STFT) to the radio frequency signal to generate a STFT signal; identify a signal-to-noise ratio associated with the radio frequency signal at the time; identify a packet-error-rate associated with the radio frequency signal at the time; identify activity when the multiplexed radio frequency signal is received by the radio frequency circuity at the time; select, based on the signal-to-noise ratio, the packet-error-rate, and the activity, a spectral mask to be applied to the STFT signal; apply the selected spectral mask to the STFT signal to generate a clean STFT signal; and apply an inverse STFT to the clean STFT signal to generate a clean radio frequency signal.