ESECTION

NAME

Esection -- SFS/Windows spectral cross-sections display

SYNOPSIS

Esection (-I) (-i item) (-G[SWN]) (-D) file

DESCRIPTION

Esection is a program to display spectral cross sections from a single file. The top part of the display shows a speech item as a waveform, wideband and/or narrow band spectrogram. The lower part of the display shows a range of analyses corresponding to any selected region in the signal. Current graphs are: (i) an inverse filtered source spectrum, (ii) an estimated filter response, (iii) a signal spectrum, (iv) an autocorrelation function, (v) a cepstrum.

The analysed region corresponds to the displayed section or to the region between the cursors. For long regions, analysis is performed in smaller windows and then averaged. The size of the maximum analysis window size may be selected by a menu option.

When the filter response graph is displayed, formant frequencies are extracted and displayed in the toolbar and in the Formants Table.

OPTIONS

-I Identify program and exit.

-i item Select first item matching item specification.

-G opt Control of spectrogram display. Argument is made from these letters: 'S' = display speech signal, 'W' = display wideband, 'N' = display narrowband. This applies to all speech items displayed.

-D Display only. Do not allow recording to operate within program.

MENU COMMANDS

Edit/Copy Display Copy the currently displayed graphs onto the clipboard.

Signal/Configure Analysis Sets the size of the analysis window. When large sections of the signal are analysed, the signal is broken up into sections of this size and the resulting analyses averaged.

View/Formants Table Displays the frequencies and bandwidths of the spectral peaks found in the LPC analysis used to plot the filter response.

View/Harmonics Table Displays the frequencies and amplitudes of the most significant spectral peaks in the signal spectrum.

MOUSE COMMANDS

LEFT

Set "start" marker.

RIGHT

Set "stop" marker.

KEYBOARD COMMANDS

[L] Scroll left

[R] Scroll right

[Z] Zoom in

[U] Zoom Out

[T] Zoom out to top

[SPACE] Replay output.

[LEFT ARROW] Shifts start cursor left by one pixel. (Use SHIFT+[LEFT ARROW] to shift stop cursor)

[RIGHT ARROW] Shifts start cursor right by one pixel. (Use SHIFT+[RIGHT ARROW] to shift stop cursor)

INPUT ITEMS

1.xx Any speech item.

VERSION/AUTHOR

1 - Mark Huckvale

SEE ALSO

Espect(SFS1) Esform(SFS1)
Fri Jul 09 14:54:50 2004