Success is attained when technology is no longer noticeable and fades into the background and videoconference participants are able to focus on their conversation and their work. The Number 1 factor affecting the ability of a system to achieve the illusion is the perceived quality of video and audio, and this is one of the primary factors to consider when evaluating any videoconferencing technology. This means rich, full-duplex audio with no echo or noticeable delays.
Video quality is a function of frame rate, pixel resolution and monitor size.
Video should be clear with rich colors, and it should be free of jerky movement, ghosting, freeze frames, or other visual anomalies. Digitizing audio and video results in large amounts of data, which is extremely expensive to transmit across public or private networks. As a result, videoconferencing systems use some sort of lossy compression for digital audio and video. The quality issue is directly related to another prominent feature of alternative videoconference systems, which is price. Another key characteristic is flexibility.