PATENT CLAIM ANALYSIS

Application Number: 15876613
Application Type: Utility
Filing Date: 2018-01
Publication Date: 2018-05
Patent Classification: ["704", "500000"]

Abstract:
An apparatus and method are disclosed for processing an audio signal. The apparatus includes an input interface, a digital filterbank having an analysis part and a synthesis part, a first phase shifter, a spectral envelope adjuster, a second phase shifter, and an output interface. The first phase shifter and the second phase shifter reduce a complexity of the digital filterbank, which includes both analysis and synthesis filters that are complex-exponential modulated versions of a prototype filter.

Claim (Index 1):
An apparatus for processing an audio signal, the apparatus comprising:\n an input interface for receiving real-valued time-domain samples; a digital filterbank including an analysis part and a synthesis part, wherein the analysis part converts the real-valued time-domain samples to complex-valued subband samples, and the synthesis part converts the complex-valued subband samples to time-domain output samples; a first phase shifter for shifting a phase of the complex-valued subband samples by an amount; a spectral envelope adjuster for modifying at least a portion of a spectral envelope of the audio signal by applying gains to the complex-valued subband samples; a second phase shifter for unshifting a phase of the complex-valued subband samples by the amount; and an output interface for outputting the time-domain output samples, wherein the analysis part includes M a =32 analysis filters formed by complex-exponential modulation of a prototype filter having a length of N=640, and the analysis part further includes a decimator for maximally decimating the real-valued time-domain input samples, wherein the synthesis part includes M s =64 synthesis filters formed by complex-exponential modulation of the prototype filter, and the synthesis part further includes an interpolator for interpolating the complex-valued subband samples, wherein the first phase shifter and the second phase shifter reduce a complexity of the digital filterbank, and wherein the apparatus is implemented with one or more hardware elements.

Metadata:
- Claim Count in Document: 20.0
- Percentile: 86.0
- Lexical Diversity: 1.88889
- Patent Class: 704.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15478788', '15466266', '15468689', '15417742', '14810174']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.3299204330120811
- 35 USC 102 Novelty (BERT): 0.5741726938649168
- Combined Prediction Score: 0.3543456590973647
- Mean Citation Score: 470.858368
- Max Citation Score: 472.14963
- Similarity Product: 407.7598536307991

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