A receiver apparatus capable of retaining the quality of video images received through complexity-reduced small-load processing without having to depend upon its associated transmitter device. In cases where an instruction is made for receiving streaming data in the process of performing the processing of download data, when the loss of such streaming data is predicted to increase in such a way as to go beyond a predetermined degree if both the processing of download data and the processing of streaming data are performed at a time, the receiver performs the processing of the streaming data by giving thereto a higher level of priority.