重建重新排序的屏幕内容编码的区块内副本
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Updated: Sep 18, 2025

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Published on: July 5, 2024
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概括
新的重建重排序区内复制 (RR-IBC) 方法通过利用对称性特性提高了屏幕内容压缩效率. 这种技术被采用到增强压缩模型 (ECM) 中,可以在运行时间影响最小的情况下显著节省比特率.
科学领域:
- 视频压缩技术视频压缩技术.
- 数字信号处理是数字信号处理.
- 计算机视觉 计算机视觉 计算机视觉
背景情况:
- 多功能视频编码 (VVC) 和增强压缩模型 (ECM) 旨在实现先进的视频压缩.
- 在VVC和ECM中,Intra Block Copy (IBC) 是提高屏幕内容效率的关键工具.
- 对于下一代视频编码,还需要进一步的改进.
研究的目的:
- 引入重建重新排序的内部块副本 (RR-IBC) 以增强屏幕内容压缩.
- 为了提高编码效率,利用屏幕内容中固有的对称性.
- 将RR-IBC集成到增强压缩模型 (ECM) 中.
主要方法:
- 开发了RR-IBC,利用对称性通过横向/垂直翻转重建块.
- 实现了对块向量候选和参考模板的翻转意识调整.
- 应用了运动约束并发出了一个RR-IBC翻转模式索引的信号.
主要成果:
- 在F类序列中实现了1.61% (Y),1.79% (Cb) 和1.76% (Cr) 的平均Bjontegaard三角率 (BD-rate) 节省.
- 报告的BD-rate节省为3.90% (Y),3.63% (Cb) 和3.63% (Cr) 的类TGM序列.
- 与ECM-5.0.0相比,对运行时间的影响显得微不足道.
结论:
- 在ECM框架中,RR-IBC显著提高了屏幕内容压缩效率.
- 该方法有效地利用内容对称性来编码收益.
- RR-IBC已经成功地被采纳为ECM标准.
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