Mercurial > hg > audiostuff
comparison intercom/README @ 2:13be24d74cd2
import intercom-0.4.1
| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
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| date | Fri, 25 Jun 2010 09:57:52 +0200 |
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| 1:9cadc470e3da | 2:13be24d74cd2 |
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| 1 README version 22jun2005 | |
| 2 | |
| 3 Welcome to intercom, a Voice over IP speaker-phone conference | |
| 4 application. The application can: | |
| 5 - dial a intercom partner via short-dial buttons | |
| 6 - make a RTP connection to transport your voice over IPv4 | |
| 7 - make a telephone conference | |
| 8 - support wideband codec (16kHz sample frequency) | |
| 9 | |
| 10 Intercom is still very limited. But the things it can do, it does | |
| 11 very well! | |
| 12 | |
| 13 | |
| 14 Modify file ~/.intercom.conf for your short-dial labels | |
| 15 and your IP-addresses. | |
| 16 | |
| 17 To start the application enter | |
| 18 | |
| 19 intercom | |
| 20 | |
| 21 Read shell script /usr/local/bin/intercom to get an idea of what is | |
| 22 going on. For better echo cancellation start intercom with the -m or | |
| 23 -l option. | |
| 24 | |
| 25 For a first test talk to yourself by clicking the button for your own | |
| 26 IP-address, e.g. EDDF TEC2 if your computer is 192.168.1.2. | |
| 27 The button should become green. | |
| 28 Attention: A short click (less then 300ms) toggles on/off, a long | |
| 29 click works as push-to-talk. | |
| 30 | |
| 31 ATTENTION: The intercom application needs PCM out for playback. This | |
| 32 hardware device is used also by other sound programs like MP3 players | |
| 33 (e.g. xmms) or WAV record/playback programs like sweep and audacity. The | |
| 34 intercom application blocks (freezes) as long as another program uses | |
| 35 PCM out. There are ways around this like using sound daemons aRTs or | |
| 36 esound. But this is outside of the intercom application. | |
| 37 | |
| 38 If you dial another intercom station, you get an one-way connection from | |
| 39 your microphone to the loudspeaker of your intercom partner. If your | |
| 40 partner clicks on the correct button (the magenta one), both of you have | |
| 41 a two-way communication. Now you or your partner can dial more intercom | |
| 42 stations to make a conference with maximum 6 stations. | |
| 43 Note: Start intercom with the -t option to get "everybody can talk and | |
| 44 listen with everybody else". | |
| 45 | |
| 46 | |
| 47 Read the file | |
| 48 http://home.arcor.de/andreadrian/intercom/draft-conference-01.txt | |
| 49 for more information. | |
| 50 | |
| 51 | |
| 52 Supported royalty free Codecs: | |
| 53 For License see ITU-T G.191 or IETF RFC3951 | |
| 54 | |
| 55 Narrowband (8kHz sample frequency): | |
| 56 ----------------------------------- | |
| 57 IETF iLBC 15.2kBit/s Global IP Sound iLBC Public License | |
| 58 ITU-T G.711 A-law 64kBit/s ITU-T SOFTWARE TOOLS' GENERAL PUBLIC LICENSE | |
| 59 ITU-T G.711 u-law 64kBit/s ITU-T SOFTWARE TOOLS' GENERAL PUBLIC LICENSE | |
| 60 ITU-T G.726 32kbs 32kBit/s ITU-T SOFTWARE TOOLS' GENERAL PUBLIC LICENSE | |
| 61 3GPP GSM 13.2kBit/s ITU-T SOFTWARE TOOLS' GENERAL PUBLIC LICENSE | |
| 62 | |
| 63 Wideband (16kHz sample frequency): | |
| 64 ---------------------------------- | |
| 65 Speex 27.8kBit/s Xiph.org license (BSD license variant) | |
| 66 | |
| 67 Author: Andre Adrian | |
| 68 E-Mail: Andre dot Adrian at dfs dot de | |
| 69 Postal: DFS Tower Frankfurt | |
| 70 Mr. Andre Adrian | |
| 71 Flughafen Gebaeude 501 | |
| 72 60549 Frankfurt, Germany |