by Robert Doverspike, Guangzhi Li, Kostas N. Oikonomou, K.K. Ramakrishnan, Rakesh K. Sinha, Dongmei Wang, and Chris Chase
Distribution of real-time multimedia over an IP backbone has been gaining momentum with content and service providers. (For example, see www22.verizon.com/FiosForHome/Channels/fios/FiosTV_comingsoon.aspx and www.iptvnews.net.) The challenge is to distribute real-time, linear broadcast TV while ensuring that users experience no more than a few seconds' delay. Loss-recovery mechanisms have a limited capability to recover from burst packet losses. To recover from short burst losses, providers use a combination of higher-layer methods, such as player loss-concealment algorithms, retransmissions, and packet-level redundancy mechanisms. If we combine these higher-layer loss-recovery mechanisms and protocols with the capability to rapidly restore the IP-transport network after a network failure, then we can provide end users with the necessary quality of service (QoS).
About this month's theme: IPTV is about more than the delivery of digital television over Internet technology—it's about creating a videocentric, visually compelling, next-generation Internet that’s accessible on any device, any time, anywhere. Read more►