MDFFixedPoint Struct Reference

Selects PseudoFloat (see PseudoFloat.h) as MDFEchoCancellation's internal numeric representation, so the algorithm runs on integer mantissa/exponent arithmetic instead of native float instructions – useful on microcontrollers without an FPU. PseudoFloat's arithmetic is verified against native float directly (see the PseudoFloat tests in tests-cmake/stt/stt_test.cpp), and MDFEchoCancellation<int16_t, MDFFixedPoint> is smoke-tested to run without crashing/NaN and to converge similarly to MDFFloat on the same synthetic signal – but it has not received the same depth of numerical scrutiny as MDFFloat, so treat it as less battle-tested. Despite the name, this is not a classic narrow Q15 fixed-point format (that would over/underflow across this algorithm's actual value range – see PseudoFloat's class doc for why). More...

#include <MDFEchoCancellation.h>

Public Types
using	float_t = PseudoFloat
using	word16_t = PseudoFloat
using	word32_t = PseudoFloat

Detailed Description

Selects PseudoFloat (see PseudoFloat.h) as MDFEchoCancellation's internal numeric representation, so the algorithm runs on integer mantissa/exponent arithmetic instead of native float instructions – useful on microcontrollers without an FPU. PseudoFloat's arithmetic is verified against native float directly (see the PseudoFloat tests in tests-cmake/stt/stt_test.cpp), and MDFEchoCancellation<int16_t, MDFFixedPoint> is smoke-tested to run without crashing/NaN and to converge similarly to MDFFloat on the same synthetic signal – but it has not received the same depth of numerical scrutiny as MDFFloat, so treat it as less battle-tested. Despite the name, this is not a classic narrow Q15 fixed-point format (that would over/underflow across this algorithm's actual value range – see PseudoFloat's class doc for why).

Member Typedef Documentation

float_t

using float_t = PseudoFloat

word16_t

using word16_t = PseudoFloat

word32_t

using word32_t = PseudoFloat

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The documentation for this struct was generated from the following file:

• src/AudioTools/AEC/MDFEchoCancellation.h