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Appendix 1:
Coping with video compression
Because compressed video uses such a narrow bandwidth (typically 128 kbps - 384 kbps) the quality of the connection is not of broadcast quality. These tips are useful for presenters on how to cope with some of the difficulties this causes.
Video
Motion is not handled as well as at might be. This means that rapid movements produce a blurred effect at the far-end. Strategies to deal with this include:
- try to avoid rapid movements, like shaking your head;
- try to avoid pacing around or erratic hand gestures;
- make use of the visualiser (show what you are talking about);
- have your presentation aids ready to hand and organised.
Audio
Users will note that there is a delay between talking at one site and when a response is noted at the remote site. This delay is just long enough for participants to talk over each other until they adjust to the delay:
- pause when you expect a response from the far-end site;
- wait until the speaker at the far-end has finished talk before you reply;
- speak at a comfortable pace but not too quickly
- enunciate clearly
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