I. Introduction
Online meeting, also known as video conference, has experienced a surge in popularity over the past few years due to the COVID-19 pandemic. According to a report [1] by Zoom, a popular online meeting platform, in April 2020, the platform hosted approximately 300 million daily meeting participants, which is considerably higher than the 10 million daily meeting participants in December 2019. With explosive user base growth, online meeting platforms has expanded more features to meet user needs.