Patent ID: 9117457
Filing Date: 2015-08-25
Classification: G10L

Abstract:
1. A noise cancellation device, wherein said noise cancellation device is a portable light weight and plug-in device suitable for real-time applications in a noisy environment based on actual needs, and comprising a primary microphone; a background microphone; an analog-to-digital converter (ADC); a signal enhancement processor; a digital-to-analog converter (DAC); and a rechargeable power supply; wherein said signal enhancement processor further comprises two short-time Fourier transforms (STFTs), an adaptive filter and an Inverse STFT and said signal enhancement processor conducts a function of adaptive filtering with the background noise signal as the reference signal so as to filter out the noise signal contained in the mixed sound signal and obtain the enhanced signal of high signal-to-noise ratio (SNR); wherein said noise cancellation device is used in a bi-directional communication comprising cell phone communications, two 4-pole sockets are provided in said noise cancellation device, one 4-pole socket is connected to a cell phone 4-pole headset for acquiring a microphone signal from the cell phone 4-pole headset and transmitting a stereo signal from a cell phone to the cell phone 4-pole headset, the other 4-pole socket is connected to the cell phone for transmitting a real-time enhanced speech signal to the cell phone and receiving the stereo signal from the cell phone, and there is a transmission path between the two 4-pole sockets for transmitting the stereo signal from the cell phone to the cell phone 4-pole headset.