Developed in-house by its engineering team, Outline has announced that the design of Warped Finite Impulse Response (WFIR) filters — one of the key technologies in the company’s Newton FPGA processor — is now protected by a domestic (Italy) patent and will soon attain the same status internationally.
“WFIR filters offer fundamental technical improvements over traditional FIR filters in that they operate on a semi-logarithmic scale, similar to the nature of human hearing,” Outline says in a statement. “This means that they’re able to maintain high filtering resolution over the entire audio range, even in the case of increasingly high sampling frequencies.
“WFIR technology also allows the use of raised cosine filters which provide a greatly enhanced level of accuracy in equalization,” the company continues. “They do require up to three times the computing power required for traditional FIR filters (not a problem with Newton’s onboard processing power), but in turn they provide up to 10 times the resolution on mid-low frequencies. They are also not subject to the latency artifacts suffered by FIR filters.’
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