There is nowadays a growing demand in vehicular communications for real-time
applications requiring video assistance. The new state-of-the-art
high-efficiency video coding (HEVC) standard is very promising for real-time
video streaming. It offers high coding efficiency, as well as dedicated low
delay coding structures. Among these, the all intra (AI) coding structure
guarantees minimal coding time at the expense of higher video bitrates, which
therefore penalizes transmission performances. In this work, we propose an
original cross-layer system in order to enhance received video quality in
vehicular communications. The system is low complex and relies on a multiple
description coding (MDC) approach. It is based on an adaptive mapping mechanism
applied at the IEEE 802.11p standard medium access control (MAC) layer.
Simulation results in a realistic vehicular environment demonstrate that for
low delay video communications, the proposed method provides significant video
quality improvements on the receiver side.

本研究旨在提出一种基于跨层系统的多描述编码方法，以增强车辆通信中接收视频的质量。在真实的车辆环境模拟结果中，该方法对于低延迟视频通信在接收端提供了显著的视频质量改进。