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首页> 外文期刊>Journal of visual communication & image representation >Hybrid global-local motion compensated frame interpolation for low bit rate video coding
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Hybrid global-local motion compensated frame interpolation for low bit rate video coding

机译：用于低比特率视频编码的混合全局局部运动补偿帧插值

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摘要

A hybrid global-local motion compensated frame interpolation (HMCI) scheme for low bit rate video coding is proposed in this paper. Different from most other global-local motion compensation algorithms, which were performed at the encoder end, the proposed scheme works solely on the decoded video stream. Thus, it can be applied to any MCP (motion compensated prediction) based standard coders without bit stream syntax modification. Along with the proposed HMCI scheme, a motion-based foreground-background segmentation method is presented. Traditional intensity-based segmentation methods can only segment moving objects from still background. In contrast, the proposed approach can segment foreground objects from both moving and still background by exploiting information carried by block-based motion vectors. Both the six-parameter affine or the eight-parameter perspective models can be applied to the foreground-background segmentation and the moving background reconstruction; while the six-parameter affine model with triangular patch warping is adopted to reconstruct the foreground blocks due to its low complexity. Experiments show that the proposed HMCI scheme achieves higher subjective (visual) quality compared to the conventional block-based frame interpolation without global motion compensation, where artifacts in moving backgrounds are significantly reduced.
机译：提出了一种用于低码率视频编码的混合全局局部运动补偿帧插值（HMCI）方案。与大多数其他在编码器端执行的全局局部运动补偿算法不同，所提出的方案仅对解码后的视频流有效。因此，它可以应用于任何基于MCP（运动补偿预测）的标准编码器，而无需修改位流语法。与提出的HMCI方案一起，提出了一种基于运动的前景-背景分割方法。传统的基于强度的分割方法只能从静止背景分割运动对象。相反，所提出的方法可以通过利用基于块的运动矢量所携带的信息来从运动和静止背景中分割前景对象。六参数仿射或八参数透视模型都可以应用于前景背景分割和运动背景重建。复杂度低，采用三角跳变的六参数仿射模型重构前景块。实验表明，与没有全局运动补偿的传统基于块的帧插值相比，所提出的HMCI方案实现了更高的主观（视觉）质量，在传统的基于块的帧插值中，运动背景中的伪像大大减少了。

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