An Unequal Error Protection (UEP) technique for H.264/AVC video bitstreams constituted by GOP structure is proposed. It is formed by motion energy concept, which is defined as the energy necessary for displacement of macroblocks between two consecutive frames. The importance of GOPs is determined by their motion energies estimated by Lagrange polynomial. This estimation method expresses a function, which considers previous GOPs having a high correlation with each other. Then, video frames are unequally protected based on their motion activities and the importance of GOPs. Since previous GOPs are used for predicting the current one, no delay for transmission of video bitstreams is required. Simulation results show that with similar Forward Error Correcting (FEC) code rates applied for different protection levels, the proposed technique outperforms other GOP-based UEP techniques.

A multi-level error protection technique for H.264/AVC video bitstreams structured by Group of Pictures (GOP) is proposed. Protection levels are determined by motion energy, which considers displacements of all macroblocks between consecutive frames. Lagrange polynomial is applied in predicting motion energy of a GOP, which is derived from previous GOPs having a high correlation with each other. The optimum number of previous GOPs is selected in order to obtain a good motion energy estimation of the current one. Conducted analyses and simulation results show that video performance obtained by the proposed technique outperforms other motion activity-based Unequal Error Protection (UEP) techniques, while a similar channel code rate is applied.

This paper presents a multi-level error protection for H.264/AVC video frames based on the importance of macroblocks. It is basically accomplished by comparing motion activities of macroblocks with their neighbouring areas. Those macroblocks having higher motion activities than their neighbouring areas are highly protected. Two-level error protection formed by this comparison is extended to construct a multi-level error protection for the video frames. In this case, an algorithm is implemented, which considers motion activities of macroblocks in two consecutive frames. Conducted analysis and simulation results express that the newly presented multi-level protection significantly improves the video performance compared to other motion-based error protection techniques, while similar code rates for channel codes are applied.

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.