PATENT CLAIM ANALYSIS

Application Number: 15776718
Application Type: Utility
Filing Date: 2018-05
Publication Date: 2018-10
Patent Classification: ["381", "098000"]

Abstract:
Example embodiments disclosed herein relate to audio signal processing with low latency. A method of processing an audio signal is disclosed. The method includes obtaining frequency parameters of a current frame of the audio signal. The method also includes generating intermediate frequency domain outputs for a set of predefined frequency bands based on the frequency parameters using predefined frequency band filter banks, a frequency band filter bank being specific to a respective frequency band in the set. The method further includes determining frequency band energies for the set of predefined frequency bands based on the intermediate frequency domain outputs, and processing the current frame based on the determined frequency band energies. Corresponding system, computer program product, and device for processing an audio signal are also disclosed.

Claim (Index 1):
A method of processing a sequence of frames of an audio signal, each of the frames representing a respective temporal portion of the audio signal, the temporal portion being no longer than 12.5 milliseconds in duration, the method comprising:\n obtaining frequency parameters of a current frame of the audio signal; generating respective intermediate frequency domain outputs for B 1  predefined frequency bands, B 1  being an integer greater than 1, based on the frequency parameters using predefined frequency band filter banks, a frequency band filter bank being specific to a respective frequency band of the B 1  predefined frequency bands, wherein\n the respective filter banks for the B 2  lowest bands of the B 1  predefined frequency bands, B 2  being an integer less than B 1 , are defined by a first function, the first function being a function of a first set of frequency parameters which comprises a) a first plurality of the frequency parameters of the current frame of the audio signal and b) a plurality of frequency parameters of at least one previous frame of the audio signal, and \n the respective filter banks for the B 3  highest bands of the B 1  predefined frequency bands, B 3 =B 1 \u2212B 2 , are defined by a second function, the second function being a function of a second set of frequency parameters which comprises c) a second plurality of the frequency parameters of the current frame of the audio signal and d) none of the frequency parameters of any previous frame of the audio signal; \n determining frequency band energies for the B 1  predefined frequency bands based on the intermediate frequency domain outputs; and processing the current frame based on the determined frequency band energies, wherein generating the intermediate frequency domain outputs for the B 1  predefined frequency bands comprises: associating each of the B 1  predefined frequency bands with at least one of a plurality of predefined frequency bins for the current frame; and generating the intermediate frequency domain output for each of the frequency bands based on the frequency parameters corresponding to the associated at least one frequency bin, wherein the first function comprises a calculation of a weighted sum of the frequency parameters of the first set, and wherein the first function is Y pb \u2032 \ue8a0 ( k ) = \u2211 m = 0 M - 1 \ue89e X p - m \ue8a0 ( k ) \ue89e T b r \ue8a0 ( k , m ) , wherein Y pb \u2032 (k) represents the intermediate frequency domain output for the kth frequency bin, of the pth frame, that is associated with the bth frequency band of the B 2  lowest bands, wherein X p-m (k) represents the frequency parameter for the kth frequency bin of the (p\u2212m)th frame of the audio signal, wherein M represents the number of frames being considered, including the current frame and the at least one previous frame of the audio signal, and wherein T b r (k, m) represents a k\u00d7m matrix consisting of real valued weightings.

Metadata:
- Claim Count in Document: 29.0
- Percentile: 93.0
- Lexical Diversity: 2.26667
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15039695', '16091069', '12550926', '14413692', '14384372']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6421953046504362
- 35 USC 102 Novelty (BERT): 0.5290494406709868
- Combined Prediction Score: 0.6308807182524913
- Mean Citation Score: 214.263278
- Max Citation Score: 322.0938700000001
- Similarity Product: 213.6327042958606

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