Error-Resilient Video Transmission for Short-Range Point-to-Point Wireless Communication

Abstract

In this paper, we present a novel error resiliency approach for short-range point-to-point wireless video transmission systems that have particularly stringent delay constraints. We propose to utilize per-packet feedback information that can be generated and transmitted instantaneously from the receiver to the transmitter in such systems to help control the transmission errors. A framework for error resilient video transmission under low-latency constraints is presented, which incorporates the instantaneous feedback into the video encoder to stop error propagation, as well as into a channel adaptive retransmission scheme at the transmitter to reduce the residual packet loss rate. The channel adaptive retransmission scheme is integrated into the system without introducing any additional delay, which is achieved by dynamically adjusting the resource allocation between video source coding and retransmission, where different resource allocation strategies are applied for different channel conditions. The performance of the proposed framework is evaluated in a real-time video transmission system, showing significant video quality improvements for a wide range of channel conditions.