ASSESSMENT OF TRANSMISSION DELAY OF REAL-TIME VIDEO STREAMING FROM A TELEMETRY SURVEILLANCE SYSTEM

Abstract

The advent of the industrial revolution 4.0 and the explosive development of advanced technologies such as IoT (Internet of Things) have solved most of the essential needs of a constantly changing digital society. One of those is the environmental video surveillance system. This paper presents such a system including compact devices such as Raspberry Pi. This system is assembled and programmed to be able to transmit images or videos from the environment area via the Internet to the user's end devices. In order to transmit video from the surveillance system to the user's end devices, the most popular video transmission protocols are tested in practice, such as HLS, DASH, RTMP, and RTSP. As a result, a difference in video transmission latency between these protocols through different experimental scenarios was found. In particular, the HTTP-based protocol group such as HLS and DASH has higher transmission latency than RTMP and RTSP and much higher than the latency of video encoding at IoT devices. The main reason comes from the different streaming video and video encoding techniques between the above protocols.