PATENT CLAIM ANALYSIS

Application Number: 16142670
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-03
Patent Classification: ["704", "227000"]

Abstract:
Embodiments may find applications to ambient noise attenuation in cell phones, for example, where a second microphone is placed at a distance from the voice microphone so that ambient noise is present at both the voice microphone and the second microphone, but where the user's voice is primarily picked up at the voice microphone. Frequency domain filtering is employed on the voice signal, so that those frequency components representing mainly ambient noise are de-emphasized relative to the other frequency components. Other embodiments are described and claimed.

Claim (Index 2):
A system for reducing noise in an audio signal, the system comprising:\n a signal transform circuit configured to receive time domain audio signals m(t) and a(t) from respective first and second transducers and, in response, provide respective first and second frequency domain signals M(k; f) and A(k; f), wherein k is a frequency bin index and f is a frame index; and a processor circuit configured to:\n receive the first and second frequency domain signals M(k; f) and A(k; f); \n combine the first and second frequency domain signals to provide a third frequency domain signal; \n identify maxima in the third frequency domain signal; \n based on the identified maxima in the third frequency domain signal, partition the frequency bin indexes k to provide respective partitioned signals M(k*; f) and A(k*; f) wherein each partition index k* corresponds to one of the identified maxima; and \n for each partition index k*:\n determine a magnitude ratio for the partitioned signals M(k*; f) and A(k*; f) corresponding to each partition index k*; \n classify the partition corresponding to each partition index k* based on a comparison of the determined magnitude ratio against a specified threshold ratio value; and \n \n provide a respective gain g* for each partition index k* based on the classification of the partition corresponding to each partition index k*; and\n generate a time-domain output signal m\u2032(t) by applying, for each partition index k*, the respective gain g* to corresponding portions of each frame of the first frequency domain signal M(k; f), wherein the output signal m\u2032(t) has a reduced noise characteristic relative to m(t).

Metadata:
- Claim Count in Document: 25.0
- Percentile: 97.0
- Lexical Diversity: 1.67857
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['14384372', '14739978', '12963877', '14743896', '14109556']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.2501030469076634
- 35 USC 102 Novelty (BERT): 0.4591969454683344
- Combined Prediction Score: 0.2710124367637305
- Mean Citation Score: 118.18266880000002
- Max Citation Score: 129.06374
- Similarity Product: 97.59111713973522

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