 | dsp-0.1: Haskell Digital Signal Processing | Contents | Index |
| DSP.Basic |
|
| Contents |
| z :: Num a => [a] -> [a] |
| zn :: Num a => Int -> [a] -> [a] |
| downsample :: Num a => Int -> [a] -> [a] |
| upsample :: Num a => Int -> [a] -> [a] |
| upsampleAndHold :: Num a => Int -> [a] -> [a] |
| pad :: (Ix a, Integral a, Num b) => Array a b -> a -> Array a b |
z is the unit delay function, eg,
z [ 1, 2, 3 ] == [ 0, 1, 2, 3 ]
zn is the n sample delay function, eg,
zn 3 [ 1, 2, 3 ] == [ 0, 0, 0, 1, 2, 3 ]
downsample throws away every n'th sample, eg,
downsample 2 [ 1, 2, 3, 4, 5, 6 ] == [ 1, 3, 5 ]
upsample inserts n-1 zeros between each sample, eg,
upsample 2 [ 1, 2, 3 ] == [ 1, 0, 2, 0, 3, 0 ]
upsampleAndHold replicates each sample n times, eg,
upsampleAndHold 3 [ 1, 2, 3 ] == [ 1, 1, 1, 2, 2, 2, 3, 3, 3 ]
pad a sequence with zeros to length n
pad [ 1, 2, 3 ] 6 == [ 1, 2, 3, 0, 0, 0 ]