Data Conference

If you want to convince your conference partner not only with words and video images, you can also present your arguments to him using computers. A PowerPoint presentation is often used for this purpose. The conference subjects must agree on one of several ways of transmitting this presentation:

Using the video conference system

Single image transmission according to the standard ITU H.261 Annex D

  • Advantages: Can be mastered by every video conference system as a receiver. No extra preparatory work is necessary.
  • Disadvantages: Considerable loss of quality! The still image is generally transmitted with a resolution of 4CIF (704x576), while 1024x768 pixels are usually used for projection with the beamer. The creator of the slides must, for example, strictly ensure that only sufficiently large fonts are used in their design. In addition, if the remote partner has a video conference system with only one monitor, he will only ever see either the speaker or the presentation during the presentation. No pointer available; application cannot be released to remote partners. In the early days of the video conference technique, this was the method of choice because there were no alternatives.

Result: Use only if other methods are not possible.

Via the internet

Special software  is required, e.g. tightvnc, MS Netmeeting

  • Advantages: Full spacial resolution broadcast. Pointer (mouse) can be used and seen by remote partner. Both the presentation and joint editing of a document are possible.
  • Disadvantages: All parties involved need an Internet connection and a PC with appropriate software. Depending on the software used, release in the firewall may be necessary, preliminary work is necessary (install software, short training).

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