High Frequency Noise Cancelling with low computational requirements:
We pre-calculate the anti-noise transfer function based on the system properties to minimize runtime computational time and load, processing every noise sample as it is captured to enable close alignment of the anti-noise for high frequencies (likely into the GHz range).
Faster Signal Processing and Lower Computational Load in all FIR applications:
We achieve Linear Phase without the usual N/2 delay/latency typically encountered with FIR filters. As an additional benefit, we also cut the computational load in half.
To provide the symmetry required for a linear phase response, the coefficient order is normally shifted by N/2 samples in traditional methods, as shown below. This results in the output being delayed by N/2 samples, which may make noise/anti-noise alignment impossible at high frequencies.
The Benefits:
Faster and Higher Resolution FIR Signal Processing – because speed and accuracy matters.
Radically Better Noise Cancelling – covering the full audio range and beyond.
The Noise Cancelling can be scaled to Performance Targets or Cost Constraints.
The near-zero latency provides effectiveness throughout the audio band and implies performance into the GHz range.