Blocking artefact free video coding based on a bilinear forward image warping model
Blocking artefact free video coding based on a bilinear forward image warping model
复制标题
基于双线性前向图像扭曲模型的无块伪影视频编码
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
C. Steinbach
中科院分区：
文献类型：
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作者：
G. Heising;K. Barthel;W. Johannsen;C. Steinbach
本文提出了一种新的甚低比特率视频编码方案。它基于使用图像扭曲模型的前向运动估计技术，从而为区域或对象的时间跟踪提供基础。为了处理新的或消失的图像内容，提出了一种新的跟踪控制网格自适应算法。为了提高编码效率，必须使用基于扭曲的预测器中的高质量像素内插，不幸的是，这也加重了高频编码伪像。为了减少这些文物的预测误差编码的双正交小波变换。建议的编码器产生的PSNR的CA的改善。0.7 dB相比，先进的H.263编码。此外，由于避免了编码图像中的任何块伪像，因此视觉质量更好。
In this paper a new very low bit rate video coding scheme is presented. It is based on a forward motion estimation technique using an image warping model, thus delivering the basis for temporal tracking of regions or objects. In order to deal with new or disappearing image contents a new algorithm for the adaptation of a tracked control grid is proposed. To improve the coding efficiency a high quality pixel interpolation in the warping based predictor has to be used, which unfortunately also emphasizes the high frequency coding artefacts. To reduce these artefacts the prediction error is coded by a biorthogonal wavelet transform. The proposed coder yields an improvement of the PSNR of ca. 0.7 dB compared to the advanced H.263 coder. In addition the visual quality is better as any blocking artefacts in the coded images are avoided.