Low delay error resilience algorithm for H.265|HEVC video transmission

Abstract

© The Author(s) 2019. Transmission of high-resolution compressed video on unreliable transmission channels with time-varying characteristics such as wireless channels can adversely affect the decoded visual quality at the decoder side. This challenging task increases when the video codec computational complexity is an essential factor for low delay video transmission. A High-Efficiency Video Voding (H.265|HEVC) standard is the most recent video coding standard produced by ITU-T and ISO/IEC organisations. In this paper, a robust error resilience algorithm is proposed to reduce the impact of receiving erroneous H.265|HEVC video bitstream at the video decoder side. The proposed work takes into consideration the compatibility of algorithm implementations with and without feedback channel update. The proposed work identify and locate the most sensitive frame areas to errors to be encoded with intra mode. The refresh intra map is generated at the encoder by utilising a Gray projection method. The conducted experimental work includes testing the codec performance with the proposed work in error-free and error-prone conditions. The simulation results demonstrate that the proposed algorithm works effectively in high packet loss rates conditions. These promising results come at the cost of a slight increase in encoding bit rate overhead and computational processing time compared with the default HEVC HM16 reference software.