Scaling of parameters. More...

Functions
int	spr_scale_setup (SprSspInfo Info, const char descript, void aux_info)

int	spr_scale_process (SprSspInfo Info, const void frame_in, void *frame_out)

void	spr_scale_free (SprSspInfo *Info)

Detailed Description

Scaling of parameters.

The input parameters are scaled according to a windowing type, with specified coefficients, or with coefficients from some default liftering types.

[scale]
`coefficients <coeff1> ...`
Define the scaling coefficients by enumeration. If only one coefficient is given, it is used for all parameters.
`file <fname> [inverse/no_inverse]`
Define a file that contains the scaling coefficients. Set inverse flag to divide instead of multiplying.
`liftering <polynomial/sine> [size]`
Choose one of the default liftering types. If size is given, the liftering is calculated for a vector of size <size>. If coefficients are also given by enumeration or with a file, both scaling factors are multiplied.
`exponent <value>`
Set the exponent for the polynomial liftering. The default value is 0.6,
`window [HAMMING/RECTANGULAR/HANNING/BLACKMAN/TRIANGULAR/GAUSSIAN](HAMMING) [norm/no_norm](norm) [inverse/no_inverse](no_inverse)`
Choose a window type. This option overrules all other options. To turn off window normalisation (so that total energy remains the same), set no_norm flag. To get the inverse of the window, set inverse flag.

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Functions