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A Novel H.264-based Multiple Description Video Coding Via Polyphase Transform and Partial Prediction

机译：多相变换和部分预测的基于H.264的新型多描述视频编码

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In this paper, a new H.264-based multiple description coding (MDC) scheme is proposed and called the prediction-based spatial polyphase transform (PSPT) MDC, to enhance the error resilience and reduce the computational complexity of the H.264 codec. In our approach, each input frame is first subsampled in both horizontal and vertical directions to form four subframes. Instead of directly coding and transporting all these subframes, two of them are predicted based on their neighboring subframes, followed by encoding and transmission. To handle the prediction process between the adjacent subframes, a hybrid interpolation algorithm is proposed, which combines the bilinear interpolation with some gradient tests. The simulation results demonstrate that the proposed MDC scheme is more robust and yields better reconstructed video qualities than existing approaches under an error-prone condition. Moreover, the computational complexity of the proposed encoder is reduced by half approximately, compared with that of the H.264/AVC
机译：本文提出了一种新的基于H.264的多描述编码（MDC）方案，称为基于预测的空间多相变换（PSPT）MDC，以增强错误恢复能力并降低H.264编解码器的计算复杂度。在我们的方法中，首先在水平和垂直两个方向对每个输入帧进行子采样，以形成四个子帧。不是直接编码和传输所有这些子帧，而是基于它们的相邻子帧来预测其中两个，然后进行编码和传输。为了处理相邻子帧之间的预测过程，提出了一种混合插值算法，该算法将双线性插值与一些梯度测试相结合。仿真结果表明，在容易出错的情况下，所提出的MDC方案比现有方法更具鲁棒性，并且产生了更好的重构视频质量。而且，与H.264 / AVC相比，所建议的编码器的计算复杂度大约降低了一半。

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