“ This new world of geographical togetherness has been brought about, to a great extent, by man's scientific and technological genius. Man has been able to dwarf distance, place time in chains and carve highways through the stratosphere. Through our scientific genius, we have made the world a neighborhood…”
Codec - "compressor/de-compressor“ - makes the audio/video data "small enough" to be practical for sending over expensive network connections. A codec takes analog signals, compresses and digitizes them, and transmits the signals over digital phone lines.
Try to arrange a simple, uncluttered, static background in neutral or darker solid colors. Do not sit in front of windows. Tilt pictures, framed degrees, awards or any other glass-covered wall hanging downward to eliminate reflection and glare.
Try to have direct light on the face of the person speaking. Too much light from behind causes silhouetting, too much from above causes shadows under the eyes.
Avoid placing videoconferencing equipment in rooms prone to echo effects or exposed to outside noise. Eliminate in-room sources of extraneous noise. On multipoint video conferences mute your location when not speaking.