This paper studies the adaptive FEC control algorithms to improve control the amount of redundancy. The recently adaptive FEC ?CNR algorithm?
considers the history of packet loss in the network before changing the amount
of redundancy and does not waste time. The performance of the CNR algorithm is used for simulation model.
The smoothing parameter is varied in order to adapt and changed the
characteristics of time series from the packet loss. Result shows the adaptive error controlalgorithm can decrease the loss rate by using a variability smoothing factor to appropriate network condition.