g711conv -- conversions according to G.711
g711conv [-a] [-u] [-P] [-A] [-R]
The g711conv utility is part of the isdn4bsd package and is used to convert
between the A-Law and u-law formats as specified in ITU G.711. It is
based on a freely available and freely usable reference implementation
done by Sun Microsystems, Inc.
The following options are available:
-a Convert A-law to u-law
-u Convert u-law to A-law
-r Reverse bits before conversion
-R Reverse bits after conversion
-P Print the resulting conversion tables (as C-source) to stdout
instead of doing the actual conversion.
A-Law and u-Law conversions are specified in ITU Recommendation G.711.
The reference implementation done by Sun Microsystems, Inc. is available
from http://www.itu.int/itudoc/itu-t/rec/g/g700-799/refimpl.txt
The command:
g711conv -P -a
prints out the A-law to u-law conversion table as C-source to stdout.
The command:
cat max_headroom.ul | g711conv -u -R > /dev/i4btel0
converts the u-law coded voice of Max Headroom to A-law, reverses the
bits of the result and moves that to an active isdn4bsd telephone connection.
The g711conv utility and this manpage were written by Hellmuth Michaelis
<hm@kts.org> based on the G.711 conversion reference code written by Sun
Microsystems, Inc. and code contributed to isdn4bsd by Stefan Bethke.
FreeBSD 5.2.1 March 15, 1999 FreeBSD 5.2.1 [ Back ] | 