Expression of QoS in distributed multimedia applications is different from level to level. Therefore QoS mapping mechanisms, which translate the QoS expression from level to level, is required. In this report, a multilevel QoS model is proposed. In this model, user level QoS can be specified abstractly in the highest level, and QoS in a lower level than the user level is expressed by one or more level-specific QoS parameter(s). Then two QoS mapping methods are proposed. One is a QoS mapping using user profile data, and the other is the one using spline functions. The former is used to map the user level QoS into a lower level QoS, and the latter performs mapping among lower level QoS parameters than the user level. The spline QoS mapping method, which is located as a hybrid of two conventional mapping methods, is applied to QoS mapping for videos. This report also provides experimental data of QoS mapping for videos.