ACOUSTIC PROCESSOR HAVING LOW LATENCY

摘要

An audio system having low latency includes a digital audio processor as well as sensor inputs coupled to the processor. The sensor inputs may be microphone inputs. The audio processor operates at the same frequency as the sensor inputs, which is typically much higher than an audio signal provided to the audio processor. In some aspects the audio processor operates as a noise cancellation processor and does not include an audio input.

主权项

1. An audio system, comprising:
a sensor generating a digital sensor signal at a first rate that is higher than 50 KHz; a digital audio processor operating at the first rate and having a first input for receiving an input audio signal at the first rate, having a second input for receiving the sensor signal at the first rate, and having an output, wherein the digital audio processor is structured to employ the sensor signal to perform noise cancelation on the input audio signal to provide a modified signal to the output; and one or more controllable gain stages structured to apply a gain to the sensor signal, wherein the one or more controllable gain stages are structured to be programmed during operation of the audio system to controllably adjust the gain of the sensor signal received at the digital audio processor to controllably adjust a level of noise cancelation performed on the input audio signal.