为了达到VVC可实现的速率扭曲界限,VVC内部编码:基于光束搜索的联合优化方案
概括
本研究探讨了与多功能视频编码 (VVC) 内编码相关的速率扭曲 (R-D) 性能. 一个基于光束搜索的新型联合RDO方案优化了VVC编码参数,实现了显著的比特率节省.
科学领域:
- 视频压缩技术的使用
- 数字信号处理 数字信号处理
- 信息理论 信息理论
背景情况:
- 多功能视频编码 (VVC) 提供先进的压缩,但面临复杂的优化挑战.
- 速度扭曲优化 (RDO) 对于平衡视频质量和比特率至关重要.
- 在VVC内编码中编码参数的相互依赖性使得实现最佳的研发性能变得复杂.
研究的目的:
- 为了确定可实现的速度扭曲 (R-D) 性能,绑定在VVC内编码中.
- 调查VVC内部编码的RDO过程中的相互依赖性.
- 为探索VVC内编码搜索空间提出一个实用的方法.
主要方法:
- 提出了一个基于光束搜索的联合速率扭曲优化 (BSJRDO) 方案.
- 编码参数 (分区,预测,转换) 在编码单元 (CU) 中共同优化.
- 核心单位之间的依赖被截断,光束大小被灵活调整为可扩展性.
主要成果:
- 与VTM 12.0相比,BSJRDO在常规条件下实现了1.30%的比特率节省,在低比特率场景中实现了3.22%的节省.
- 这种方法符合VVC解码语法.
- 性能增长可以通过不同的计算开销进行定制.
结论:
- BSJRDO提供了一种实用的方法,以实现VVC内部编码的最佳研发性能极限.
- 该方法为VVC压缩提供了一种性能增强的解决方案.
- 在各种应用中,BSJRDO可实现灵活的复杂性-性能权衡.
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