PATENT CLAIM ANALYSIS

Application Number: 15753139
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-08
Patent Classification: ["381", "094100"]

Abstract:
The present invention relates in one aspect to a microphone array signal processing system comprising a digital buffer coupled to a signal input and configured to store first and second digital audio signals. A beamformer analyser is configured to, in response to a first voice trigger, determine noise statistics based on the first signal segment of the first digital audio signal and a first signal segment of the second digital audio signal. A coefficients calculator is configured to calculate a first set of fixed beamformer coefficients of a beamforming algorithm. The beamforming algorithm is configured for applying the first set of fixed beamformer coefficients to the first signal segments of the first and second digital audio signals retrieved from the digital buffer to produce a noise reduced digital audio signal.

Claim (Index 11):
A method of processing microphone array signals comprising steps of:\n a) storing a first digital audio signal representing a first acoustic signal received by a first microphone of a microphone array in a digital buffer, b) storing a second digital audio signal representing a second acoustic signal received by a second microphone in the digital buffer, where the second acoustic signal is received concurrently with the first acoustic signal, c) generating or receiving a voice trigger input indicating a first signal segment in the digital buffer holding a first voice feature of the first digital audio signal, d) determining, in response to the voice trigger, noise statistics, based on the first signal segment of the first digital audio signal and a first signal segment of the second digital audio signal, aligned in time to the first signal segment of the first digital audio signal, e) calculating a first set of fixed beamformer coefficients of a beamformer algorithm based on the noise statistics, f) retrieving at least the first signal segment of the first digital audio signal and the first signal segment of the second digital audio signal from the digital buffer, and g) applying the beamformer algorithm to the first signal segment of the first digital audio signal and the first signal segment of the second digital audio signal to produce a noise reduced digital audio signal.

Metadata:
- Claim Count in Document: 30.0
- Percentile: 88.0
- Lexical Diversity: 2.38596
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['11568240', '13967055', '14566959', '14274544', '15355865']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6615921540062136
- 35 USC 102 Novelty (BERT): 0.4829905028383288
- Combined Prediction Score: 0.6437319888894252
- Mean Citation Score: 209.615182
- Max Citation Score: 215.50554
- Similarity Product: 177.67438083929662

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