How to Create IP Videophone Systems
Broadband Internet access, either through DSL, cable modem, WiFi hot spots, or even emerging standards such as WiMax, is an essential ingredient for videophones. Quality is directly proportional to bandwidth and the quality of service available within that bandwidth. Broadband data rates push the user experience of video telephony over the critical hurdle of acceptable quality and cost.
However, bandwidth is not the only technological consideration; if it were, videophones would have reached critical mass in parallel with DSL. Other key technologies that had to be place include QoS support within the WAN capable of supporting video, more efficient video codecs, reliable transport protocols, effective A/V synchronization and integrated silicon capable of bringing the cost of processing resources under control.
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