一个两步的离散的等位数基导向的运动建模方法,用于增强的运动补偿
概括
本研究引入了一种新的视频编码方法,使用离散等号基面 (DCO) 运动建模来提高效率. 该方法结合了全球和本地运动信息,在HEVC和VVC编码器中实现了显著的比特率节省.
科学领域:
- 数字信号处理 数字信号处理
- 视频压缩 视频压缩
- 计算机视觉 计算机视觉
背景情况:
- 视频编码依赖于尽量减少序列中的冗余.
- 当前基于区块的方法在本地模型共性.
- 先进的标准比前者提供了更高的效率.
研究的目的:
- 为视频编码开发一种新的共同性建模方法.
- 为了无地融合全球和本地运动同质性信息.
- 为了提高预测准确性和减少计算复杂性.
主要方法:
- 一个两步离散的等位数基面 (DCO) 运动建模用于预测.
- 使用DCO运动模型来平滑和稀疏地表示复杂的运动.
- 分区框架以调查符合全球运动的情况,并为不符合地区引入本地DCO模型.
主要成果:
- 在高效视频编码 (HEVC) 编码器中提高了速率扭曲性能.
- 通过使用DCO预测框架实现了高达9%的比特速率节省.
- 与通用视频编码 (VVC) 编码器相比,报告的比特率节省了2.37%.
结论:
- 拟议的方法有效地减少了全球和本地运动的共同性.
- 对于复杂的运动,DCO运动建模比传统的运动模型具有优势.
- 这种方法在现代编码标准中提高了视频压缩效率.
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