联合HARQ与H.264的无线视频传输

Integration of HARQ with H.264 for Wireless Video Transmission

为了改善H.264码流在无线环境中传输的鲁棒性,提出了一种利用混合自动重传(HARQ)技术的视频传输方案.该方案根据H.264数据分割得到的不同优先级的数据分区,采用不同的HARQ重传方案实现不均等错误保护.仿真结果表明,在高误码率的信道环境下,采用HARQ技术进行视频传输可以显著提高解码图像的质量,在相同带宽下,其性能明显优于均等错误保护方案.

In order to improve the robustness of H. 264 coded video over wireless channels, a new scheme using hybrid automatic repeat request （HARQ） technique for video transmission was proposed. To achieve the unequal error protection, the scheme adopted different HARQ schemes to different priority-data, that is based on data partition mode of H. 264. The simulation results show that remarkable improvement in quality of the reconstructed video is obtained by using HARQ technique, especially in the low SNR regions. Moreover, the proposed scheme is with much more error robust compared with the equal error protection scheme under the same bandwidth.