With COVID-19, the interest for digital interactions has raised, putting in turn real-time (or low-latency) codecs into a new light. Most of the codec research has been traditionally focusing on coding efficiency, while very little literature exist on real-time codecs. It is shown how the speed at which content is made available impacts both latency and throughput. The authors introduce a new test set up, integrating a paced reader, which allows to run codec in the same condition as real-time media capture. Quality measurements using VMAF, as well as multiple speed measurements are made on encoding of HD and full HD video sequences, both at 25 fps and 50 fps to compare the respective performances of several implementations of the H.264, H.265, VP8, VP9 and AV1 codecs.

翻译：随着COVID-19的出现,对数字互动的兴趣已经提高,将实时(或低延迟)编码器变成新的光线,大多数编码器研究传统上都侧重于编码效率,而实时编码器的文献很少,显示内容提供的速度如何影响延缓性和吞吐量。作者采用了一个新的测试装置,将一个节奏阅读器结合在一起,从而能够在与实时媒体捕捉相同的条件下运行编码器。对HD和全HD视频序列的编码进行了质量测量,对H264、H.265、VP8、VP9和AV1编码器的分别进行了25英尺和50英尺的多重速度测量,以便比较H264、H.265、VP8、VP9和AV1编码器的安装情况。