Rate control strategies for high‐priority data in two‐layer packet video transmission
Masahisa Kawashima, Masahiro Inoue, Hideyoshi Tominaga · Electronics and Communications in Japan (Part I Communications) · 1995
Abstract To transmit the video image with the two‐layer transmission by utilizing the priority cell control of the ATM network, the required bandwidth varies depending on the rate control scheme for the high‐priority information. Therefore, several high‐priority rate control schemes can be considered such as the scheme in which the ratio of the high‐priority bit rate to the entire bit rate is kept constant or the scheme in which the peak rate is specified for the high‐priority information. Therefore, for these two schemes, the optimum layering parameters will be derived in order to keep the minimum bandwidth requirements and to compare the bandwidth requirements by using the optimum layering parameters. As the result of the comparison, it was concluded that the peak rate control is superior when the number of multiplexed video sources (terminals) in the network is low and when the bandwidth requirements for the low‐priority information is not strict. It was concluded also that the scheme to keep the ratio of the high‐priority information fixed is superior when the number of multiplexed video sources in the network is high and when the bandwidth requirements for the low‐priority information is strict.