53 lines
1.5 KiB
Groff
53 lines
1.5 KiB
Groff
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.\"
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.\" Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
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.\" Universitaet Berlin. See the accompanying file "COPYRIGHT" for
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.\" details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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.\"
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.PU
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.TH GSM_PRINT 3
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.SH NAME
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gsm_print \(em GSM\ 06.10 supplementary function for debugging
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.SH SYNOPSIS
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#include "gsm.h"
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#include <stdio.h>
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int gsm_print(f, g, frame);
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.br
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FILE * f;
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.br
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gsm g;
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.br
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gsm_frame frame;
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.SH "DESCRIPTION"
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Gsm is an implementation of the final draft GSM 06.10
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standard for full-rate speech transcoding, a lossy
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speech compression algorithm.
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The compressed form involves 76 variables with different numbers
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of significant bits packed into 33 bytes.
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.PP
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If you are interested in investigating the details of this
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coding scheme, gsm_print() can be used to dump the contents
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of individual gsm_frames to a file pointer provided by
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the application.
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.PP
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.SH "RETURN VALUE"
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gsm_print() returns -1 if the frame is invalid, else 0.
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.SH EXAMPLE
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A single frame looks like this:
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.br
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.nf
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LARc: 29 32 20 11 08 05 06 07
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#1: Nc 0040 bc 0 Mc 1 xmaxc 60
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06 04 00 03 03 06 04 02 02 04 05 04 01
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#2: Nc 0045 bc 1 Mc 1 xmaxc 48
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03 07 01 03 04 04 07 01 03 02 04 05 03
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#3: Nc 0091 bc 1 Mc 1 xmaxc 46
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00 03 03 07 01 06 02 04 05 03 03 02 04
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#4: Nc 0120 bc 0 Mc 1 xmaxc 47
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07 03 06 00 03 03 06 05 00 03 02 07 04
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.nf
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.SH BUGS
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Please direct bug reports to jutta@cs.tu-berlin.de and cabo@cs.tu-berlin.de.
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.SH "SEE ALSO"
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gsm(3), gsm_explode(3)
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