This document discusses and compares IPTV and OTT delivery methods. IPTV delivers live and on-demand content over a dedicated operator network using UDP and transport streams, allowing the operator full control over quality and bandwidth. OTT delivers content over the public internet using HTTP and TCP, allowing content to be accessed on any device but with less operator control over quality. Key differences are around delivery protocols, network usage, and level of operator control. The document also outlines common IPTV and OTT features, architectures, and billing models.