PATENT CLAIM ANALYSIS

Application Number: 15997375
Application Type: Utility
Filing Date: 2018-06
Publication Date: 2019-05
Patent Classification: ["381", "098000"]

Abstract:
A filter for correcting phase distortion produced at low frequencies in a loudspeaker system is created by inverting the phase response of the determined complex-valued frequency response of a loudspeaker system. The inverted phase response is obtained by taking the complex conjugate of the phase response. The impulse response for the inverted phase response is obtained by means of an inverse Fourier transform of the inverted phase response. The impulse response provides a linear phase FIR filter having a long filter length. The linear phase FIR filter is applied to the audio signal input to the loudspeaker system. Prior to inverting the phase response, the determined complex-valued frequency response of a loudspeaker system can be subjected to high frequency blanking and polynomial smoothing. Also, the linear phase FIR filter can be subjected to a window function prior to applying the filter to the audio signal.

Claim (Index 4):
The method of  claim 3  wherein a second stage smoothing function is applied to the phase response prior to inverting the phase response, thereby creating a smooth polynomial approximation of the high frequency blanked phase response.

Metadata:
- Claim Count in Document: 26.0
- Percentile: 94.0
- Lexical Diversity: 2.44444
- Patent Class: 381.0
- Transitional Phrase Type: none
- Component Type: 0
- Foreign Priority: False
- Related Applications: ['14525898', '12825866', '10434448', '12293062', '13145758']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7217372107708373
- 35 USC 102 Novelty (BERT): 0.5648701694682114
- Combined Prediction Score: 0.7060505066405747
- Mean Citation Score: 284.079092
- Max Citation Score: 443.46036
- Similarity Product: 390.8678596081495

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

Dataset: test