Contour-based multidirectional intra coding for HEVC
Contour-based multidirectional intra coding for HEVC
复制标题
HEVC 基于轮廓的多向帧内编码
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
J. Ostermann
中科院分区：
文献类型：
--
作者：
Thorsten Laude;J. Ostermann
帧内编码是所有视频编码系统中不可或缺的一部分。然而，HEVC标准中的帧内预测在用于预测的可用信息量以及每个块的预测方向的有限数量方面具有若干限制。在本文中，我们提出了一种新颖的基于轮廓的多向帧内编码模式，该模式将计算机视觉技术与传统视频编码技术相结合，以克服这些限制。视频信号的结构部分和平滑部分被分别预测。结构部分是基于轮廓检测、参数化和外推算法进行预测的，而平滑区域是通过样本值延续等低复杂度技术来填充的。因此，编码效率显着提高，与 HM-16.3 相比，加权平均 BD 码率增益高达 1.9%。独立编解码器实现比 JPEG 平均比特率节省 29.7%，并且性能优于相关工作。
Intra coding is an indispensable part of all video coding systems. However, the intra prediction in the HEVC standard has several limitations with respect to the available amount of information which is exploited for the prediction and the limited number of prediction directions per block. In this paper, we propose a novel contour-based multidirectional intra coding mode which combines computer vision technologies with conventional video coding technologies to overcome these limitations. Structural parts and smooth parts of the video signal are predicted separately. While the structural parts are predicted based on contour detection, parameterization and extrapolation algorithms, the smooth areas are filled by means of low complexity technologies like sample value continuation. Thereby, the coding efficiency is considerably increased, with weighted average BD-rate gains of up to 1.9% compared to HM-16.3. A stand-alone codec implementation achieves average bit rate savings of 29.7% over JPEG and outperforms related work.
用于感知压缩和质量评估的视频纹理数据库
DOI：
10.1109/icip.2015.7351309
发表时间：
2015
期刊：
--
影响因子：
--
作者：
Papadopoulos M
通讯作者：
Papadopoulos M