Video telephony

Although the transmission of video images over telephone lines has a long history, new technology, particularly video compression techniques, now makes video telephony affordable. The technology is practical, and it can be successful if systems maintain high quality and ease of use. The results of behavioral science studies of visual communication indicate that adding video to voice calls increases the effectiveness of human communication. Human factors and behavioral science techniques can evaluate the quality of visual communication systems and make such systems easy for customers to use.