gridrec {Rwave}

Reconstruction from a Ridge

Description

Reconstructs signal from sample of a ridge, in the Gabor case.

Usage

gridrec(gtinput, node, phinode, nvoice, freqstep, scale, Qinv,
epsilon, np, real=FALSE, check=FALSE)

Arguments

gtinput

Gabor transform, output of cgt.

node

time coordinates of the ridge samples.

phinode

frequency coordinates of the ridge samples.

nvoice

number of different frequencies.

freqstep

sampling rate for the frequency axis.

scale

scale of the window.

Qinv

inverse of the matrix Q of the quadratic form.

epsilon

coefficient of the Q_2 term in reconstruction kernel

np

number of samples of the reconstructed signal.

real

if set to TRUE, uses only constraints on the real part of the transform.

check

if set to TRUE, computes cgt of reconstructed signal.

Value

Returns a list containing the reconstructed signal and the chained ridges.

sol

reconstruction from a ridge.

A

<gaborlets,dualgaborlets> matrix.

lam

coefficients of dual gaborlets in reconstructed signal.

dualwave

array containing the dual gaborlets.

gaborets

array of gaborlets located on the ridge samples.

solskel

Gabor transform of sol, restricted to the ridge.

inputskel

Gabor transform of signal, restricted to the ridge.

References

See discussions in the text of “Practical Time-Frequency Analysis”.

See Also

sridrec, gregrec, regrec, regrec2.