论文标题
每个剪辑Lagrangian乘数优化HEVC
Per Clip Lagrangian Multiplier Optimisation for HEVC
论文作者
论文摘要
大多数互联网流量是视频内容。这驱动了对视频压缩的需求，以便在低目标比特率上提供高质量的视频。本文研究了调整速率失真方程对压缩性能的影响。比例性k的常数用于修改H.265（HEVC）中使用的Lagrange乘数。部署直接优化方法以最大程度地提高特定剪辑的BD率改进。对于单个剪辑，这最高可提高21％的BD率。此外，我们使用YouTube提供的更现实的材料语料库。结果表明，使用BD速率作为目标函数的直接优化可以导致以前方法无法获得的比特率节省的进一步提高。
The majority of internet traffic is video content. This drives the demand for video compression in order to deliver high quality video at low target bitrates. This paper investigates the impact of adjusting the rate distortion equation on compression performance. An constant of proportionality, k, is used to modify the Lagrange multiplier used in H.265 (HEVC). Direct optimisation methods are deployed to maximise BD-Rate improvement for a particular clip. This leads to up to 21% BD-Rate improvement for an individual clip. Furthermore we use a more realistic corpus of material provided by YouTube. The results show that direct optimisation using BD-rate as the objective function can lead to further gains in bitrate savings that are not available with previous approaches.
