| 摘要 |
A moving image transmission system determines adequate number of packets, which are corresponding to redundant portion, in accordance with a network state.;The moving image transmission system estimates a correlation between a transmission bit rate and a packet loss rate based on both of information which indicates the packet loss rate and bit rate information, and determines the packet loss rate, which makes an encode bit rate of moving image data maximum, based on the correlation, and determines redundancy, which is applied to the moving image data, based on the determined packet loss. |
| 主权项 |
1. A quality control apparatus, comprising:
a state information receiving unit to receive network state information which includes both of a packet loss rate of moving image data caused at a certain time and time information indicating the certain time; a state information record storing apparatus to store bit rate information, which includes both of a transmission bit rate of the moving image data caused at a certain time and time information indicating the certain time, in association with the network state information which includes the time information; a moving image quality control unit to read both of information indicating the packet loss rate which is associated with the time information included in each packet of the moving image data and the transmission bit rate from the state information record storing apparatus, and to estimate a correlation between an encode bit rate and the packet loss rate of the moving image data based on each of the read information, and to determine the packet loss rate, which makes the encode bit rate of the moving image data maximum based on the correlation, and to determine redundancy, which is applied to the moving image data based on the determined packet loss rate, wherein the moving image quality control unit estimates a first correlation formula, which represents a correlation between the transmission bit rate and the packet loss rate, based on the information indicating the packet loss rate and the transmission bit rate which are read from the state information record storing device, and estimates a second correlation formula, which represents the correlation between the encode bit rate and the packet loss rate of the moving image data based on a difference between the transmission bit rate which is corresponding to the information indicating each the packet loss rate and which is determined by the first correlation formula and a transmission bit rate of a redundant code, which is used at a time indicated by the time information included in the bit rate information including the transmission bit rate corresponding to the information indicating each the packet loss rate and which is determined based on the packet of the moving image data, and determines the packet loss rate, which makes the encode bit rate of the moving image data maximum based on the second correlation formula, and determines the redundancy, which is applied to the moving image data, based on the determined packet loss rate. |
