cvphase

Convert phase spectrum.

Usage

cvphase(p, ifmt, ipos, ibin, ofmt, opos, obin, nbin, rev, sr, len, hop)

p

original phase spectrum at frame ipos and in the format ifmt; p is a vector with n values

ifmt, ofmt

input and output phase format (1 = locked phase, 2 = normal phase (not locked))

ipos, opos

input and output frame index

ibin, obin

input and output spectral bin

nbin

number of spectral bins to convert

rev

reverse output phase (0=no, 1=yes)

sr

signal sampling rate in Hz; this argument is currently not used but must be supplied!

len, hop

transformation length and hopsize (in samples) used for analysis and resynthesis

Description

This function replaces the following macro code

    [macro cvphase arg: #p #ifmt #ipos #ibin #ofmt #opos #obin #nbin #rev #sr #len #hop]
    #dp  := eval 2 * pi * $#hop / $#len
    #idt := eval $#ifmt == 2 ? 0 : $#dp * $#ipos
    #odt := eval $#ofmt == 2 ? 0 : $#dp * $#opos
    #r := eval init($#nbin,1,0)
    for #i := 0 to $#i < $#nbin step #i := int $#i+1
        #z := eval ($#p[$#i] + pi + ($#i+$#ibin)*$#idt) % (2*pi)
        if $#rev == 1 #z := eval -$#z
        $#r[$#i] := eval ($#z - ($#i+$#obin)*$#odt) % (2*pi) - pi
    end
    exit 1 set $#r

Result

A vector r with nbin values, containing the converted phase values.

Note: The input and output phase values are in the range -pi..pi.

See also

hcomb, optmm, script application MulAc

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