PATENT CLAIM ANALYSIS

Application Number: 16029314
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-02
Patent Classification: ["381", "074000"]

Abstract:
Digital audio signal processing techniques used to provide an acoustic transparency function in a pair of headphones. A number of transparency filters can be computed at once, using optimization techniques or using a closed form solution, that are based on multiple re-seatings of the headphones and that are as a result robust for a population of wearers. In another embodiment, a transparency hearing filter of a headphone is computed by an adaptive system that takes into consideration the changing acoustic to electrical path between an earpiece speaker and an interior microphone of that headphone while worn by a user. Other embodiments are also described and claimed.

Claim (Index 1):
An audio system comprising:\n a first adaptive subsystem that is to compute an adaptive path estimation filter, whose transfer function estimates a path from an input of an earpiece speaker to an output of an interior microphone of a headset, using a playback signal that is driving the earpiece speaker and using an output signal from the interior microphone, wherein the first adaptive subsystem removes a filtered version of the playback signal, that is filtered by the adaptive path estimation filter, from an output signal of the interior microphone; a second adaptive subsystem that is to compute an adaptive output filter that has an input coupled to receive a reference signal produced by an exterior microphone of the headset and an output that is driving the earpiece speaker, wherein the adaptive output filter is computed using a difference between i) a version of the reference signal that has been filtered by a signal processing control block and ii) the output signal of the interior microphone from which the filtered version of the playback signal has been removed; and a processor configured to adjust a signal processing control block to cause the second adaptive subsystem to adapt the output filter to meet, at a given time, any one of a plurality of different transparency conditions, wherein in a first condition, the output filter is automatically adapted to recreate through the speaker driver the ambient acoustic environment that is sensed in the reference signal, in a second condition the output filter is producing an anti-noise signal to cancel any leaked ambient sound, and in a third condition being a hybrid ANC-transparency mode the output filter is producing a signal that is designed to cancel the ambient sound in just a portion of an audio band while intentionally passing ambient sound through the speaker driver in another portion of the audio band.

Metadata:
- Claim Count in Document: 2.0
- Percentile: 95.0
- Lexical Diversity: 1.48684
- Patent Class: 381.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: False
- Related Applications: ['15273396', '13896164', '12794588', '13369011', '13895659']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.7159091386790404
- 35 USC 102 Novelty (BERT): 0.5354843567434275
- Combined Prediction Score: 0.6978666604854791
- Mean Citation Score: 255.729132
- Max Citation Score: 375.63736
- Similarity Product: 357.6064838929129

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