Retransmission-based error control for interactive video applications over the Internet

摘要

Retransmission has been known ineffective for interactive video transmission over the Internet. The paper challenges this view by presenting several retransmission-based error control schemes that can be used for interactive video applications. In particular, the schemes do not require any artificial extension of control time and play-out delays, and thus are suitable for interactive applications. They take advantage of the motion prediction loop employed in most motion compensation-based codecs. By correcting errors in a reference frame caused by earlier packet loss, the schemes prevent error propagation. Since a reference frame is arranged to be referenced for the construction of the current image much later than the display time of the reference frame, the delay in repairing lost packets can be effectively masked out. Internet video transmission experiments reveal the superior error resilience of the schemes.