Real-time acoustic processor
AssigneeAvnera Corporation
InventorAmit Kumar
Life of this patent
Estimating the term…
Abstract
The disclosure includes an acoustic processing network comprising a Digital Signal Processor (DSP) operating at a first frequency and a Real-Time Acoustic Processor (RAP) operating at a second frequency higher than the first frequency. The DSP receives a noise signal from at least one microphone. The DSP then generates a noise filter based on the noise signal. The RAP receives the noise signal from the microphone and the noise filter from the DSP. The RAP then generates an anti-noise signal based on the noise signal and the noise filter for use in Active Noise Cancellation (ANC).
Claims20
An electrical network for processing acoustic signals, comprising:
- a decimator configured to receive a noise signal based on an output from a microphone and output a decimated noise signal at a first frequency;
- a digital signal processor operating at the first frequency, the digital signal processor configured to receive the decimated noise signal and generate a noise filter based on the noise signal;
- and
- a real-time acoustic processor operating at a second frequency higher than the first frequency, the real-time acoustic processor configured to receive the noise signal, to receive the noise filter from the digital signal processor, and to generate an anti-noise signal based on the noise signal and the noise filter.
A method for real-time acoustic processing, comprising:
- decreasing a frequency of a noise signal from a second frequency to a first frequency;
- receiving the noise signal of the first frequency at a digital signal processor operating at the first frequency;
- generating a noise filter at the digital signal processor based on the noise signal of the first frequency;
- communicating the noise filter from the digital signal processor to a real-time acoustic processor operating at the second frequency higher than the first frequency;
- receiving the noise signal of the second frequency at the real-time acoustic processor;
- and
- generating an anti-noise signal at the real-time acoustic processor based on the noise signal of the second frequency and the noise filter.
An active noise cancellation audio device, comprising:
- a microphone configured to output a noise signal;
- an analog-to-digital converter configured to convert the noise signal to a digital noise signal;
- a decimator configured to receive a digital noise signal based on an output from a microphone and output a decimated noise signal at a first frequency;
- a digital signal processor operating at the first frequency, the digital signal processor configured to receive the decimated noise signal and generate a noise filter based on the noise signal;
- and
- a real-time acoustic processor operating at a second frequency higher than the first frequency, the real-time acoustic processor configured to receive the digital noise signal, receive the noise filter from the digital signal processor, and generate an anti-noise signal based on the noise signal and the noise filter.
Dependencies are inferred from the claim text.