1GSM_PRINT(3) Library Functions Manual GSM_PRINT(3)
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6 gsm_print — GSM 06.10 supplementary function for debugging
7
9 #include "gsm.h" #include <stdio.h>
10 int gsm_print(f, g, frame);
12 FILE * f;
13 gsm g;
14 gsm_frame frame;
15
17 Gsm is an implementation of the final draft GSM 06.10 standard for
18 full-rate speech transcoding, a lossy speech compression algorithm.
19 The compressed form involves 76 variables with different numbers of
20 significant bits packed into 33 bytes.
21 If you are interested in investigating the details of this coding
23 scheme, gsm_print() can be used to dump the contents of individual
24 gsm_frames to a file pointer provided by the application.
25
27 gsm_print() returns -1 if the frame is invalid, else 0.
28
30 A single frame looks like this:
31 LARc: 29 32 20 11 08 05 06 07
32 #1: Nc 0040 bc 0 Mc 1 xmaxc 60
33 06 04 00 03 03 06 04 02 02 04 05 04 01
34 #2: Nc 0045 bc 1 Mc 1 xmaxc 48
35 03 07 01 03 04 04 07 01 03 02 04 05 03
36 #3: Nc 0091 bc 1 Mc 1 xmaxc 46
37 00 03 03 07 01 06 02 04 05 03 03 02 04
38 #4: Nc 0120 bc 0 Mc 1 xmaxc 47
39 07 03 06 00 03 03 06 05 00 03 02 07 04
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42 Please direct bug reports to jutta@pobox.com and cabo@tzi.org.
43
45 gsm(3), gsm_explode(3)
46 GSM_PRINT(3)