PATENT CLAIM ANALYSIS

Application Number: 15956796
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2018-12
Patent Classification: ["704", "200100"]

Abstract:
An FFT processor applies the fast Fourier transform to each frame of an input signal and generates frequency domain data. A first spectrum calculator calculates the amplitude spectrum of the input signal for the individual frequency components based on the frequency domain data. A dispersion index calculator calculates a dispersion index indicating the level of dispersion of the amplitude spectrum of the input signal in the latest frames. A noise index calculator calculates a noise index indicating the level of noise contained in the input signal. A second spectrum calculator calculates the amplitude spectrum of the noise for the individual frequency components. A gain calculator calculates a spectral gain for suppressing the noise for the individual frequency components. An IFFT processor applies the inverse fast Fourier transform to the frequency domain data after multiplication by the spectral gain at a multiplier, and generates a signal to be output.

Claim (Index 18):
A noise suppression method comprising:\n dividing an input signal into frames, applying a fast Fourier transform to each frame of the input signal, and generating frequency domain data; calculating an amplitude spectrum of the input signal for individual frequency components based on the frequency domain data; calculating a dispersion index for the individual frequency components, the dispersion index indicating a level of dispersion of the amplitude spectrum of the input signal in latest frames; calculating a noise index based on the dispersion index, the noise index indicating a level of noise contained in the input signal; calculating an amplitude spectrum of the noise for the individual frequency components based on the amplitude spectrum of the input signal and the noise index; calculating a spectral gain for suppressing the noise for the individual frequency components based on the amplitude spectrum of the input signal and the amplitude spectrum of the noise; multiplying the frequency domain data by the spectral gain; and applying an inverse fast Fourier transform to the frequency domain data after multiplication by the spectral gain, and generating a signal to be output.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 91.0
- Lexical Diversity: 2.78571
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['10451141', '11442663', '14124118', '12605291', '13814332']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3001084845002414
- 35 USC 102 Novelty (BERT): 0.5071464628476289
- Combined Prediction Score: 0.3208122823349802
- Mean Citation Score: 282.792432
- Max Citation Score: 305.1808
- Similarity Product: 244.834124720192

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test