In this paper, we discuss a design of a real-time DV (Digital Video) streaming system, which dynamically adjusts packet transmission rate from the source host according to feedback information from the network. In our DV streaming system, the destination host continuously notifies the source host of network status (e.g., the end-to-end packet transmission delay and the packet loss probability in the network). The source host dynamically adjusts its packet transmission rate by lowering the quality of the video stream using a feedback-based control mechanism. Our DV streaming system achieves an efficient utilization of network resources, and prevents packet losses in the network. Thus, our DV streaming system realizes high-quality and real-time video streaming services on the Internet. By modifying the existing DVTS (Digital Video Transmission System), we implement a prototype of our real-time DV streaming system. Through several experimental results, we demonstrate the effectiveness of our DV streaming system.