PATENT CLAIM ANALYSIS

Application Number: 16362156
Application Type: Utility
Filing Date: 2019-03
Publication Date: 2019-07
Patent Classification: ["379", "406080"]

Abstract:
The invention relates to an adaptive filter unit, in particular for being used as an echo canceller, comprising a first filter input, configured to receive a first electric audio signal, indicative of a first audio signal A(t), a second filter input, configured to receive a second electric audio signal, indicative of a second audio signal B(t), a processor and a filter output. The processor is configured to calculate and provide audio estimation data X(f n , A(t 1 , . . . , t M(fn) )) in the frequency domain; to calculate a transformed second audio signal Y(f n , B(t)), formed by a transformation of the second audio signal B(t) into the frequency domain; and to calculate a filtered audio signal by subtracting delayed audio estimation data from the transformed second audio signal, wherein the delayed audio estimation data is provided by a memory unit of the adaptive filter unit, which is arranged to provide a data exchange with the processor, and wherein the delayed audio estimation data comprises a frequency dependent time delay compared to the transformed second audio signal.

Claim (Index 10):
A method for performing echo cancelling, comprising the steps of\n receiving a first electric audio signal, indicative of a first audio signal A(t); receiving a second electric audio signal, indicative of a second audio signal B(t); calculating and providing audio estimation data X(f n , A(t 1 , . . . , t M(fn) )) formed by transformation of the first audio signal A(t) into the frequency domain, for frequencies f n =f 1 , . . . , f N , wherein N is an integer number, and with a number of sampling points M(f n ) of the first audio signal A(t); calculating a transformed second audio signal Y(f n , B(t)), formed by a transformation of the second audio signal B(t) into the frequency domain; receiving delayed audio estimation data provided by a memory unit of an adaptive filter unit, which is arranged to provide a data exchange with the processor, and wherein the delayed audio estimation data comprises a frequency dependent time delay compared to the transformed second audio signal; calculating a filtered audio signal by subtracting delayed audio estimation data from the transformed second audio signal; and calculating and providing a processed audio output signal by transforming the filtered audio signal into the time domain.

Metadata:
- Claim Count in Document: 41.0
- Percentile: 99.0
- Lexical Diversity: 2.94667
- Patent Class: 379.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15655295', '12668329', '15264835', '12506983', '15608447']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.4738301287298864
- 35 USC 102 Novelty (BERT): 0.5284527479058843
- Combined Prediction Score: 0.4792923906474862
- Mean Citation Score: 241.608656
- Max Citation Score: 363.2111
- Similarity Product: 328.3621180047632

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

Dataset: test