PATENT CLAIM ANALYSIS

Application Number: 15909513
Application Type: Utility
Filing Date: 2018-03
Publication Date: 2019-09
Patent Classification: ["704", "226000"]

Abstract:
Signals are received from audio pickup channels that contain signals from multiple sound sources. The audio pickup channels may include one or more microphones and one or more accelerometers. Signals representative of multiple sound sources are generated using a blind source separation algorithm. It is then determined which of those signals is deemed to be a voice signal and which is deemed to be a noise signal. The output noise signal may be scaled to match a level of the output voice signal, and a clean speech signal is generated based on the output voice signal and the scaled noise signal. Other aspects are described.

Claim (Index 11):
A method for digital speech enhancement, the method comprising:\n performing a blind source separation (BSS) process upon signals from a plurality of audio pickup channels that include a microphone signal and an accelerometer signal; and performing voice activity detection using the accelerometer signal and not the microphone signal, by determining an energy level of the accelerometer signal and providing an output that indicates a speech confidence level or a binary speech no speech value, by comparing the energy level to an energy level threshold, wherein the BSS process includes\n a sound source separation process that generates a first signal representative of a first sound source and a second signal representative of a second sound source, and \n a voice source detection process that determines which of the first and second signals is a voice signal and which is a noise signal, and outputs i) the signal determined to be the voice signal as an output voice signal and ii) the signal determined to be the noise signal as an output noise signal, wherein a plurality of variance parameters of a separation algorithm for generating the first signal are adapted based on the VADa output and the first signal is determined to be the voice signal.

Metadata:
- Claim Count in Document: 50.0
- Percentile: 90.0
- Lexical Diversity: 1.96491
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15610500', '13631716', '13840136', '13840667', '15069808']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2730523105469272
- 35 USC 102 Novelty (BERT): 0.4829400104885005
- Combined Prediction Score: 0.2940410805410845
- Mean Citation Score: 213.345446
- Max Citation Score: 237.96663
- Similarity Product: 194.9339465963048

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