Abstract

A new methodology to measure coded image/video quality using the just-noticeable-difference (JND) idea was proposed in Lin et al. (2015). Several small JND-based image/video quality datasets were released by the Media Communications Lab at the University of Southern California in Jin et al. (2016) and Wang et al. (2016) [3]. In this work, we present an effort to build a large-scale JND-based coded video quality dataset. The dataset consists of 220 5-s sequences in four resolutions (i.e., 1920×1080,1280×720,960×540 and 640×360). For each of the 880 video clips, we encode it using the H.264/AVC codec with QP=1,…,51 and measure the first three JND points with 30+subjects. The dataset is called the “VideoSet”, which is an acronym for “Video Subject Evaluation Test (SET)”. This work describes the subjective test procedure, detection and removal of outlying measured data, and the properties of collected JND data. Finally, the significance and implications of the VideoSet to future video coding research and standardization efforts are pointed out. All source/coded video clips as well as measured JND data included in the VideoSet are available to the public in the IEEE DataPort (Wang et al., 2016 [4]).

Highlights

  • Digital video plays an important role in our daily life

  • The construction of a large-scale compressed video quality dataset based on the JND measurement, called the VideoSet, was described in detail in this paper

  • One of the follow-up tasks is to determine the relationship between the JND point location and the video content

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Summary

Introduction

Digital video plays an important role in our daily life. About 70% of today’s Internet traffic is attributed to video, and it will continue to grow to the 80–90% range within a couple of years. Despite the introduction of a set of fine-tuned coding tools in the standardization of H.264/AVC and H.265 (or HEVC), a major breakthrough in video coding technology is needed to meet the practical demand. As a follow-up, two small-scale JNDbased image/video quality datasets were released by the Media Communications Lab at the University of Southern California. They are the MCL-JCI dataset [2] and the MCL-JCV dataset [3] targeted the JPEG image and the H.264/AVC video, respectively.

Review on perceptual visual coding
Source video
Video encoding
Subjective test environment
Subjective test procedure
JND data post-processing via outlier removal
Unreliable subjects
Normality of post-processed JND samples
Discussion
Findings
Significance and implications of VideoSet
Conclusion and future work
Full Text
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