An adaptive error-resilient scheme for temporal video transcoding

In order to achieve good performances when temporally transcoded bitstream transmitted in the unreliable routines, an adaptive error-resilient scheme for temporal video transcoding is proposed. After all original frames´ motion intensity and error sensitivity values are calculated in the sliding window, every possible frame allocation´s quality and error impact values due to the frame skipping are evaluated. Then, following the impact values, an optimum frame allocation selection approach based on the joint impact value is presented, which enables the dynamic balance between the coding efficiency and the error-resilient capability. Additionally, an effective intra refresh algorithm is advised to further enhance the robustness. Experiments prove that the re-decoded video´s PSNR can be improved by the proposed scheme when transmitted unreliably.