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Function downsample4

function downsample4(E1 &&, csize_t<offset>) dsp

template <typename E1, size_t offset = 0>
KFR_FUNCTION internal::expression_downsample<4, offset, E1> downsample4(E1&& e1,
                                                                        csize_t<offset> = csize_t<0>())

Downsamples a signal by a factor of 4 by selecting every fourth sample.

Warning

This function does NOT apply any anti-aliasing filter. It simply drops samples (keeping samples at positions offset , offset+4 , offset+8 , ...). Use this only when no filtering is desired; otherwise prefer a proper samplerate_converter with a decimation factor of 4.

Template parameters
E1 The input expression type.
offset Index of the first sample to keep (0, 1, 2, or 3).
Parameters
e1 The input expression.
Returns
An expression producing the downsampled signal.

Fully qualified name: kfr::downsample4(E1 &&, csize_t<offset>)

Declared at dsp/sample_rate_conversion.hpp:542

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