2 .\" Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
3 .\" Universitaet Berlin. See the accompanying file "COPYRIGHT" for
4 .\" details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
9 gsm_print \(em GSM\ 06.10 supplementary function for debugging
14 int gsm_print(f, g, frame);
22 Gsm is an implementation of the final draft GSM 06.10
23 standard for full-rate speech transcoding, a lossy
24 speech compression algorithm.
25 The compressed form involves 76 variables with different numbers
26 of significant bits packed into 33 bytes.
28 If you are interested in investigating the details of this
29 coding scheme, gsm_print() can be used to dump the contents
30 of individual gsm_frames to a file pointer provided by
34 gsm_print() returns -1 if the frame is invalid, else 0.
36 A single frame looks like this:
39 LARc: 29 32 20 11 08 05 06 07
40 #1: Nc 0040 bc 0 Mc 1 xmaxc 60
41 06 04 00 03 03 06 04 02 02 04 05 04 01
42 #2: Nc 0045 bc 1 Mc 1 xmaxc 48
43 03 07 01 03 04 04 07 01 03 02 04 05 03
44 #3: Nc 0091 bc 1 Mc 1 xmaxc 46
45 00 03 03 07 01 06 02 04 05 03 03 02 04
46 #4: Nc 0120 bc 0 Mc 1 xmaxc 47
47 07 03 06 00 03 03 06 05 00 03 02 07 04
50 Please direct bug reports to jutta@cs.tu-berlin.de and cabo@cs.tu-berlin.de.
52 gsm(3), gsm_explode(3)