Unequal error protection of H.264/AVC video over wireless using hierarchical QAM

Authors:
Yoong Choon Chang;Sze Wei Lee;Ryoichi Komiya
Affiliations:
Multimedia University, Cyberjaya, Selangor, Malaysia;Multimedia University, Cyberjaya, Selangor, Malaysia;National Institute of Information and Communications Technology (NICT), Hikarino-oka Yokosuka, Japan
Venue:
SIP '07 Proceedings of the Ninth IASTED International Conference on Signal and Image Processing
Year:
2007

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Abstract

In this paper, unequal error protection (UEP) of H.264/AVC coded video using hierarchical quadrature amplitude modulation (HQAM), which takes into consideration the non-uniformly distributed importance of intracoded frame (I-frame) and predictive coded frame (P-frame) is proposed. In order to optimally assign the hierarchical QAM high priority (HP) and low priority (LP) bits to the H.264/AVC coded video, a low-complexity optimal allocation algorithm is also proposed. The proposed low-complexity algorithm reduces the computational complexity of the optimal allocation problem, compared with the exhaustive search process. Simulation results demonstrate that our UEP scheme outperforms the conventional UEP scheme.