| 摘要 |
PURPOSE:To prevent missing of picture information at receiver side and deterioration of a picture by comparing a moving average of input speeds of input signals to a buffer means with 1st and 2nd threshold levels respectively, giving priority to a signal of a terminal equipment and processing the signal into a packet when the moving average exceeds the 1st threshold level. CONSTITUTION:Moving average calculation sections 121-12n apply weight average calculation to a time series data of a picture coded signal by a weight function to obtain a moving average Y. Then threshold levels A1, A2 of the moving average Y are provided to set a normal area, a high load area and an overload area. A transmission assignment processing section 10 applies packet processing to a signal at a terminal equipment when the moving average Y enters the overload area with priority. When the moving average Y enters the high load area, the packet processing is stopped. When the moving average is a history for processing period, it represents prediction that the tendency at a current point of time will continue for a while. Thus, the capacity excess of an exchange network is prevented in advance. |
