oversampling

Documentation

Index

• Constants
• type OversamplerDecimator
  • func CreateOversamplerDecimator(factor uint32) OversamplerDecimator

Constants

const (
	ATTENUATION_HALF_DECIBEL     = 0.9440608762859234
	LOOKAHEAD_SAMPLES_ONE_SIDE   = 4
	LOOKAHEAD_SAMPLES_BOTH_SIDES = 2 * LOOKAHEAD_SAMPLES_ONE_SIDE
)

* Global constants.

Types

type OversamplerDecimator

type OversamplerDecimator interface {
	Oversample(in []float64, out []float64) error
	Decimate(in []float64, out []float64) error
}

* An oversampler / decimator increases or decreases the sample rate of a * signal by a constant factor. * * When oversampling the signal, band-limited interpolation is applied. * * When decimating (downsampling) the signal, a band-limiting filter is * applied to prevent aliasing.

func CreateOversamplerDecimator

func CreateOversamplerDecimator(factor uint32) OversamplerDecimator

* Creates an oversampler / decimator with the requested oversampling factor. * * The oversampling factor can be either 1, 2 or 4. * * (An oversampler / decimator with an oversampling factor of one technically * just copies buffers when oversampling / decimating though.)