Streaming video over the Internet: approaches and directions

TLDR

The rapid expansion of the Internet and growing demand for multimedia have made streaming video a major focus, yet real‑time delivery faces bandwidth, delay, and loss constraints, lacks QoS guarantees, and struggles to balance efficiency and flexibility in multicast scenarios. This article surveys six critical areas of streaming video and evaluates their tradeoffs while outlining future research directions. The authors review key techniques in video compression, application‑layer QoS control, continuous media distribution, streaming servers, media synchronization, and streaming protocols, discussing the main challenges and prevailing approaches for each.

Abstract

Due to the explosive growth of the Internet and increasing demand for multimedia information on the Web, streaming video over the Internet has received tremendous attention from academia and industry. Transmission of real-time video typically has bandwidth, delay, and loss requirements. However, the current best-effort Internet does not offer any quality of service (QoS) guarantees to streaming video. Furthermore, for video multicast, it is difficult to achieve both efficiency and flexibility. Thus, Internet streaming video poses many challenges. In this article we cover six key areas of streaming video. Specifically, we cover video compression, application-layer QoS control, continuous media distribution services, streaming servers, media synchronization mechanisms, and protocols for streaming media. For each area, we address the particular issues and review major approaches and mechanisms. We also discuss the tradeoffs of the approaches and point out future research directions.