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Cost Sensitive Learning Based HEVC Screen Content Intra Coding for Mobile Devices

机译:基于成本敏感的学习HEVC屏幕内容移动设备编码

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摘要

The distinguished features of screen contents lead to the development of the Screen Content Coding (SCC) extension of High Efficiency Video Coding (HEVC). Intra coding of HEVC-SCC has to evaluate traditional HEVC intra coding modes and additional modes for screen contents, which poses a challenge for coding such a content on mobile devices. Furthermore, the heterogeneous mobile devices have varying complexity requirements. In this paper, a flexible screen content intra coding scheme is proposed, which can trade between encoding complexity and rate-distortion performance degradation via cost sensitive learning. Taking the cost of different decisions into account, binary classifiers are designed to determine whether a particular kind of coding modes will be evaluated. By adopting the cost-proportionate weighted sampling, the proposed scheme can learn a flexible coding policy offline via reinforcement learning. Experimental results show the effectiveness of the proposed scheme.
机译:屏幕内容的杰出特征导致高效视频编码(HEVC)的屏幕内容编码(SCC)扩展的发展。 HEVC-SCC的帧内编码必须评估传统的HEVC帧内编码模式和屏幕内容的附加模式,这对移动设备上的这种内容构成了挑战。此外,异构移动设备具有不同的复杂性要求。在本文中,提出了一种灵活的屏幕内容帧内编码方案,其可以通过成本敏感学习进行编码复杂性和速率失真性能下降。考虑到不同决策的成本,二进制分类器旨在确定是否会评估特定类型的编码模式。通过采用成本比例的加权采样,所提出的方案可以通过加强学习来脱机中的灵活编码政策。实验结果表明了拟议方案的有效性。

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