With the increasing advancements in video compression efficiency achieved by newer codecs such as HEVC, AV1, and VVC, and intelligent encoding strategies, as well as improved bandwidth availability,there has been a proliferation and acceptance of newer services such as Netflix, Twitch, etc. However, such higher compression efficiencies are achieved at the cost of higher complexity and encoding delay, while many applications are delay sensitive. Hence, there is a requirement for faster, more efficient codecs to achieve higher encoding efficiency without significant trade-off in terms of both complexity and speed. We present in this work an evaluation of the latest MPEG-5 Part 2 Low Complexity Enhancement Video Coding (LCEVC) for live gaming video streaming applications. The results are presented in terms of bitrate savings using both subjective and objective quality measures as well as a comparison of the encoding speeds. Our results indicate that, for the encoding settings used in this work, LCEVC outperforms both x264 and x265 codecs in terms of bitrate savings using VMAF by approximately 42\% and 38\%. Using subjective results, it is found that LCEVC outperforms the respective base codecs, especially for low bitrates. This effect is more evident for x264 than for x265, i.e., for the latter the absolute improvement of quality scores is smaller. The objective and subjective results as well as sample video sequences are made available as part of an open dataset, LCEVC-LiveGaming at https://github.com/NabajeetBarman/LCEVC-LiveGaming.
翻译:随着诸如HEVC、AV1、VVC等新编码器和智能编码战略等新编码器在视频压缩效率方面不断提高,以及带宽提供率的改善,出现了像Netflix、Twitch等新服务的扩散和接受情况。然而,这种更高的压缩效率的实现是以更高的复杂度和编码延迟的成本,而许多应用程序则具有延迟敏感性。因此,需要更快、更高效的编码器,以便在不进行复杂和速度方面的重大交换的情况下实现更高的编码效率。我们在此工作中对最新的MPEG-5第二部分低复杂度增强视频编码(LCEVC)进行现场导航传输视频传输应用程序的升级和接受。使用主观和客观的质量衡量以及对编码速度的比较,结果显示以位节率节省。 LCEVC在使用VMAF 约42 ⁇ 和 38°C 进行比比Blate节节流的节省率方面的提高值。