Audio

MOBOTIX cameras possess complete lip-synchronous audio integration for displaying images live and for storage. The cameras support the following audio functions:

• Output of predefined voice messages via the speaker,
• Room monitoring via a browser (ActiveX) or Windows client,
• Messages to the camera via a Windows client,
• Event-controlled sound/video recording,
• Telephony and alarm messages via ISDN and IP (see Telephony).

One of the advantages of MOBOTIX cameras in audio mode is that the audio channel is transmitted independent of the selected image rate, and the display is always lip-synchronous. This means that despite the sound transmission, the user can adapt the data rate to the bandwidth of the current connection at any time. This is an effective way of compensating for fluctuations in the network bandwidth. More especially however, if a high-speed main connection (such as a fiber-optic cable) fails, it is easy to switch over to a slower backup connection (WLAN, Internet VPN); all that is restricted is the image rate, not the sound or functionality.

The audio output can take place in the browser or in the client program which is also supplied, “MxControlCenter”. In the case of audio output in the browser, "ActiveX" browser mode must be enabled. This mode is only available in the Microsoft Internet Explorer. Make sure that ActiveX is enabled in the browser settings. Despite MxPEG, other browsers or PDA only support images without sound.

Another great advantage of MOBOTIX cameras is that the audio output has multi-channel support, which means that several users can retrieve synchronous audio at the same time and at different image rates. This is all-important in long-term storage, in particular, because despite a high-speed live display of 25 fps, the storage image rate can be lowered to as few as 0.2 fps (i.e. one frame every 5 seconds) at the viewer's terminal, saving on memory capacity. Nevertheless, the sound is recorded synchronously.