Integration of Recursive Temporal LMMSE Denoising Filter Into Video Codec
Integration of Recursive Temporal LMMSE Denoising Filter Into Video Codec
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DOI：
10.1109/tcsvt.2009.2031453
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发表时间：
2010-02-01
影响因子：
8.4
通讯作者：
Wong, Peter H. W.
中科院分区：
文献类型：
--
作者：
Guo, Liwei;Au, Oscar C.;Wong, Peter H. W.
噪声的存在会极大地影响视频压缩系统的效率。为了提高性能，大多数实用的视频压缩系统都采用去噪滤波器作为视频编码器的预处理模块，或者作为视频解码器的后处理模块，但去噪引入的复杂度可能非常高。本文首先提出了一种用于视频去噪的递归时间线性最小均方误差（LMMSE）滤波器。基于对混合视频压缩过程的分析，提出了两种新颖的方案，一种用于视频编码，另一种用于视频解码，其中所提出的递归时间LMMSE滤波器分别无缝地集成到编码和解码过程中。对于这两种方案，去噪的实现几乎没有引入额外的计算。实验结果验证了所提出的方案对噪声视频序列编码和解码的有效性。
The presence of noise can dramatically affect the efficiency of video compression systems. For performance improvement, most practical video compression systems adopt a denoising filter as a pre-processing module for the video encoder, or as a post-processing module for the video decoder, but the complexity introduced by denoising can be very high. This paper first presents a recursive temporal linear minimum mean squared error (LMMSE) filter for video denoising. Based on the analysis of the hybrid video compression process, two novel schemes are presented, one for video encoding and the other for video decoding, in which the proposed recursive temporal LMMSE filter is seamlessly integrated into the encoding and the decoding processes, respectively. For both of these two schemes, the denoising is implemented with nearly no extra computation introduced. Experimental results validate the effectiveness of the proposed schemes on encoding and decoding noisy video sequences.