摘要： 提出了一种增强无线网络环境下视频图像传输差错恢复能力的新方法。利用改进的DCT系数强制奇偶修改方法将辅助信息嵌入到视频图像中,用于解码器端完成视频图像序列差错检测、再同步、差错恢复,以增强H.263+标准解码器的差错恢复功能,获得更好的图像重构质量。实验仿真结果表明此方法可以在不额外增加信源传输码字的前提下,有效地改善传输质量。

关键词: 数据嵌入, 差错掩盖, 数据恢复, 帧重构, H.263+

Abstract: A novel method to enhance the ability for error resilient video transmission over the noisy channel in the wireless network is proposed. In order to obtain better reconstruction quality, some different types accessorial information are imperceptibly embedded into image bit-stream by even- odd signaling forcibly of the DCT coefficients which has improved to reduce the visual loss and influence of image caused by modified DCT coefficients. This paper combines these information to jointly achieve detection, resynchronization and recovery, which can enhance the error concealment performance of H.263+ standard decoder. Simulations on typical video sequences show that the proposed approach has a significant improvement in transmission performance against conventional techniques used in standard baseline H.263+ encoder and decoder without changing the transmitted bit-stream syntax.

中图分类号: 

• TN919.8