An adaptive unequal error protection based on motion energy of H.264/AVC video frames

Abstract

This paper presents an unequal error protection technique for H.264/AVC video bitstreams. It is formed by the concept of motion energy, which is defined as the energy necessary for displacement of blocks between two frames having motion information. The importance of frames are adaptively set by threshold values, which are calculated based on variation of motion energies between consecutive frames. Simulations show that the proposed technique effectively improves the quality of compressed videos formed by different formats.

Optimized Motion Energy Estimation for Group of Pictures in Multi-Level Error Protection of H.264/AVC Video Bitstreams

“…Results confirm that the correlation between GOPs is reduced by increasing their temporal distance [11]. The obtained normalized correlations match with the definition of Lebesgue constant value.…”

“…Motion activity of frames and the importance level of the relevant GOP are evaluated. The motion activity of a frame is obtained by motion energies of macroblocks [11]. The importance of a macroblock is determined by comparing its motion energy with a threshold value.…”

“…The importance of a macroblock is determined by comparing its motion energy with a threshold value. An optimal threshold value is calculated by averaging motion energy of neighboring areas of the macroblock [11]. Figure 4 shows neighboring areas of different macroblocks.…”

“…Neighboring areas are conventionally related to the macroblocks closest to the considered one. It is proven that neighboring macroblocks have the highest correlation to the examined one [11]. Motion energies in neighboring areas can be used as references for evaluating the motion activity in the examined macroblock.…”