Optimized cross-layer forward error correction coding for H.264 AVC video transmission over wireless channels

Abstract

Forward error correction (FEC) codes that can provide unequal error protection (UEP) have been used recently for video transmission over wireless channels. These video transmission schemes may also benefit from the use of FEC codes both at the application layer (AL) and the physical layer (PL). However, the interaction and optimal setup of UEP FEC codes at the AL and the PL have not been previously investigated. In this paper, we study the cross-layer design of FEC codes at both layers for H.264 video transmission over wireless channels. In our scheme, UEP Luby transform codes are employed at the AL and rate-compatible punctured convolutional codes at the PL. In the proposed scheme, video slices are first prioritized based on their contribution to video quality. Next, we investigate the four combinations of cross-layer FEC schemes at both layers and concurrently optimize their parameters to minimize the video distortion and maximize the peak signal-to-noise ratio. We evaluate the performance of these schemes on four test H.264 video streams and show the superiority of optimized cross-layer FEC design.

Cross-Layer-Based Adaptive Video Transport Over Low Bit-Rate Multihop WSNs

“…2) It may be achieved also through the level of error control being used, such as omitting any kind of error control for low priority traffic and adding very robust FEC schemes for the high-priority traffic, such as described in [19]. 3) Lastly, it may be achieved through the coding rate or level of modulation being used as a counter measure to the channel degradation conditions.…”

AntMind: Enhancing error protection for video streaming in wireless networks

“…Optimized Cross-Layer FEC (OCLFEC) is a Group of Pictures-based (GOP) mechanism which attributes a priority value to the GoP for transmission from the mean squared error of each frame [6]. It uses two error correcting codes, Luby Trasform (LT) and Rate-compatible Parity Check (RCPC).…”

QoE-driven video delivery improvement using packet loss prediction

“…Another mechanism is the optimised cross-layer FEC (OCLFEC) [28], which computes priority values based on the mean squared error of each frame. Two error correction codes are used, namely Luby transform (LT) and rate-compatible parity check (RCPC).…”