PATENT CLAIM ANALYSIS

Application Number: 15905319
Application Type: Utility
Filing Date: 2018-02
Publication Date: 2018-06
Patent Classification: ["381", "055000"]

Abstract:
This application relates to methods and apparatus for loudspeaker protection. A loudspeaker protection system ( 100 ) receives a digital audio signal comprising a plurality of samples at an input node (IN). A delay block ( 15 ) delays the digital audio signal and a gain block ( 14 ) applies a controlled gain to the delayed digital audio signal. An excursion predictor ( 12 ) is configured to receive a version of the audio signal from the signal path upstream of the delay block and determine a predicted excursion for a loudspeaker based on the audio signal. A gain controller ( 23 ) controls a gain setting (g) of the gain block in response to the predicted excursion and a first loudspeaker impulse response model and a predetermined excursion limit. The gain controller ( 23 ) is configured to determine at least one gain setting {g a  g i } to be applied to a set of samples {V a  . . . V i } of the audio signal delayed by the delay block where the set of samples of the audio signal corresponds to a time-span which is less than an impulse response settling time of the loudspeaker.

Claim (Index 15):
An apparatus comprising a loudspeaker protection system, wherein the loudspeaker protection system comprises:\n an input node for receiving a digital audio signal comprising a plurality of samples; a delay block for delaying the digital audio signal; a gain block for applying a controlled gain to the delayed digital audio signal output from the delay block; an excursion predictor configured to receive a version of the audio signal from the signal path upstream of the delay block and determine a predicted excursion for a loudspeaker based on the audio signal; and a gain controller for controlling a gain setting of the gain block in response to the predicted excursion and a first loudspeaker impulse response model and a predetermined excursion limit, wherein the gain controller is configured to determine a first set of gain settings to be applied to a first set of samples of the audio signal delayed by the delay block based on a first predicted excursion, and is further configured to subsequently determine at least a second subsequent set of gain settings for a second set of samples of the audio signal delayed by the delay block based on a subsequent predicted excursion, wherein the second set of samples partly overlaps with the first set of samples; wherein the gain controller is configured to use, for any sample in both the first and second sets, the lowest respective gain setting of the first and second sets of gain settings that correspond to that sample; and wherein each set of samples of the audio signal corresponds to a time-span which is less than an impulse response settling time of the loudspeaker.

Metadata:
- Claim Count in Document: 47.0
- Percentile: 88.0
- Lexical Diversity: 2.47674
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15186992', '15547836', '15547850', '13360427', '13206379']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7179287870517018
- 35 USC 102 Novelty (BERT): 0.599312312235467
- Combined Prediction Score: 0.7060671395700784
- Mean Citation Score: 307.582856
- Max Citation Score: 507.70108
- Similarity Product: 495.9730243521666

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