Institute for Telecommunication Sciences / Research / Quality of Experience / Video Quality Research / Guides and Tutorials / Guides and Tutorials
Video Quality Guides and Tutorials
Video Quality Metrics Tutorial
This 2012 tutorial is an overview of the algorithms available in the VQM software, including guidance on which calibration options and models suit different purposes. Other topics covered are the different types of models, mapping multiple subjective datasets onto a single scale, objective video quality model validation, and the Consumer Digital Video Library.
This tutorial uses Microsoft PowerPoint® 2010 slides with audio. Start the slideshow to hear the audio. Subtitles are provided in the notes section for each page. Microsoft provides support on ways to view a PowerPoint presentation for Windows® on their website.
Description of VQM Tools
This written guide gives an overview of the VQM Software tools.
CVQM Overview
This written guide describes how to use the Command Line VQM tools. This software does not have a manual. Usage information is included here, and in the "readme" file.
Spatial Filtering
This webpage describes a spatial information (SI) filter developed by NTIA/ITS. MATLAB® code is provided. The SI filter detects long edges and estimates edge angle.
Subject Screening
A summary of subject screening techniques. MATLAB® code implementing the techniques is provided.
McGurk Effect
This video demonstrates how the eyes and ears work together to understand speech. This is called audiovisual perception or cross-modal perception. Audio of a woman saying "ba ba ba" has been dubbed over the picture of that woman saying "da da da." Your perception of what she is saying changes as you open and close your eyes.
Subtitles are not provided, because the McGurk effect is an audiovisual effect.
Tools for Video Quality in Public Safety
The ITS Video Quality Research program participates in multi-agency DHS-sponsored video quality research programs that engage public safety practitioners, Federal partners, manufacturers, and representatives of standards making bodies to improve the way video technologies serve the public safety community. The Guide to Defining Video Quality Requirements, and its associated Recommendations Tool, were designed to help practitioners with little or no technical expertise in video describe requirements for their video quality needs and select key video system components.
Tutorials from the 1990's
1996 Video Quality Tutorial
This 1996 tutorial is an overview into early parameters developed by NTIA. Many of the features and parameters in today's VQM software are updated and improved versions of these older algorithms.
Why Develop New Metrics for Digital Video Systems
This tutorial from the late '90s explains why video quality metrics are needed.