Low-Latency Dynamic Adaptive Streaming over HTTP (LL-DASH) is an extension of the MPEG-DASH protocol designed to minimize latency in video streaming. While both LL-DASH and DASH are based on similar principles and share many features, the key difference lies in their focus on reducing latency.
High Efficiency Streaming Protocol (HESP) is an adaptive HTTP-based video streaming protocol with a particular focus on low end-to-end latency and fast channel-change.
Time to First Byte (TTFB) refers to the time between the browser requesting a resource (i.e., a webpage, a video manifest, a video segment) and when it receives the first byte of information from the server. This time includes DNS lookup and establishing the connection using a TCP handshake and TLS handshake if the request is made
Domain model for monitoring of Perceptual Video Quality (PVQ).
High level view of video streaming workflow for live content.
Measure of underlying technical aspects or characteristics of media streaming (ITU.T P.10 item 6.212), including: performance, availability. Poor QoS can impact PVQ and/or QoE. In contrast to QoE, QoS is an expression of the system’s various technical characteristics including: network performance (e.g. packet loss, e.g. network jitter, e.g. bitrate, e.g.
Quality of Experience is a measure of overall delight or annoyance of viewer’s media streaming experience (ITU.T P.10 item 6.209). Many factors can impact QoE, including: poor PVQ, poor QoS, poor application performance. In contrast to QoS, QoE is an expression of the end-viewer’s overall sentiment regarding the usage of
Measure of visual quality of video content as perceived by viewers. Poor PVQ can impact QoE. Poor QoS can impact PVQ. The perceived video quality can be evaluated by computers based on mathematical models in laboratory or production settings (see Objective Video Quality) or based on human observation in informal
HTTP Live Streaming is an Apple standard for ABR media streaming using fMP4 or MPEG-TS containers and H.264 or H.265 video codecs.
Video compression standard, published in 2013, with the goal to succeed AVC/H.264 by reducing bitrate up to 50% while maintaining the same perceptual video quality (PVQ).
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