利用分级正交幅度调制的无线视频传输方法

doi:10.3969/j.issn.1001-2400.2011.03.008

Abstract

Abstract:

For band-limited wireless video transmission with multi-subcarriers, a novel unequal error protection strategy for video transmission over the wireless channel by using hierarchical quadrature amplitude modulation (HQAM) is proposed. Firstly, all the subcarriers available are divided into different classes based on their channel quality, and then the HQAM modulation parameters are determined according to the channel quality of those subcarriers and the importance of different parts of the video bitstream to the reconstructed video. The unequal error protection of the video bitstream is implemented by modulating different parts in the video stream to subcarriers with unequal HQAM parameters. Experimental results demonstrate that compared with the reported methods, the proposed method effectively improves the quality of the reconstructed video with the maximum improvement of about 2dB.

Key words: HQAM, unequal error protection, video transmission, OFDM

LI Peng；LU Zhaoyang；CHANG Yilin；FENG Ni'na；LI Zhibin. Unequal error protection strategy for video transmission over wireless channels with hierarchical QAM[J].J4, 2011, 38(3): 42-47.

References

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Unequal error protection strategy for video transmission over wireless channels with hierarchical QAM

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