Modeling the impact of frame rate on perceptual quality of video

2008 ◽  
Author(s):  
Yen-Fu Ou ◽  
Tao Liu ◽  
Zhi Zhao ◽  
Zhan Ma ◽  
Yao Wang
Keyword(s):  
Frame Rate ◽  
Perceptual Quality ◽  
The Impact

Modeling the impact of spatial resolutions on perceptual quality of immersive image/video

2016 ◽  
Author(s):  
Rongbing Zhou ◽  
Mingkai Huang ◽  
Shuyi Tan ◽  
Lijun Zhang ◽  
Du Chen ◽  
...  
Keyword(s):  
Perceptual Quality ◽  
The Impact

scholarly journals Subjective Evaluation of User Quality of Experience for Omnidirectional Video Streaming

2020 ◽  
Vol 32 (3) ◽  
pp. 409-421
Author(s):  
Štefica Mrvelj ◽  
Marko Matulin ◽  
Sergo Martirosov
Keyword(s):  
Quality Of Experience ◽  
Subjective Evaluation ◽  
The Other ◽  
Frame Rate ◽  
Dynamic Scenes ◽  
Head Mounted Display ◽  
Subjective Testing ◽  
Perception Of Quality ◽  
The Impact

This paper reports on the results of subjective testing of user Quality of Experience (QoE) for omnidirectional video (ODV) streaming quality. The test was conducted among 20 test subjects who watched three ODVs using a Head Mounted Display (HMD) system. The length of the videos was between two and three minutes. The first video was used for training purposes and contained no quality degradations. The quality of the other two ODVs was degraded by manipulating the resolution or by introducing different frame drop patterns. While watching the pre-prepared videos the subjects indicated if they noticed the changes in the quality and then rated it. After watching each video, the subjects completed a separate questionnaire, which evaluated their level of enjoyment and discomfort with the video. The results showed that the degradation of both objective parameters (video resolution and frame rate) impacted the subjects’ perception of quality; however, the impact was somewhat alleviated in ODV which contained dynamic scenes and fast camera movements.

WAVELET-BASED MEDICAL IMAGE COMPRESSION USING EZW: OBJECTIVE AND SUBJECTIVE EVALUATIONS

2004 ◽  
Vol 04 (01) ◽  
pp. 93-110 ◽  
Author(s):  
YIN FEN LOW ◽  
ROSLI BESAR
Keyword(s):  
Image Compression ◽  
Medical Image ◽  
Wavelet Decomposition ◽  
Perceptual Quality ◽  
Wavelet Filters ◽  
Subjective Evaluations ◽  
Varying Length ◽  
Energy Compaction ◽  
The Impact

Recently, the wavelet transform has emerged as a cutting edge technology within the field of image compression research. Wavelet methods involve overlapping transforms with varying-length basis functions. This overlapping nature of the transform alleviates blocking artifacts, while the multi-resolution character of the wavelet decomposition leads to superior energy compaction and perceptual quality of the decompressed image. Embedded zerotree wavelet (EZW) coder is the first algorithm to show the full power of wavelet-based image compression. The main purpose of this paper is to investigate the impact and quality of orthogonal wavelet filter in compressing medical image by using EZW. Meanwhile, we also look into the effect of the level of wavelet decomposition towards compression efficiency. The wavelet filters used are Haar and Daubechies. The compression simulations are done on three modalities of medical images. The objective (based on PSNR) and subjective (perceived image quality) results of these simulations are presented.

scholarly journals Influence of Resolution and Frame Rate on the Linear In-Stream Video Ad QoE

2014 ◽  
Vol 7 (1) ◽  
Author(s):  
Miloš Ljubojević ◽  
Vojkan Vasković ◽  
Zdenka Babić ◽  
Dušan Starčević
Keyword(s):  
Video Streaming ◽  
Quality Of Experience ◽  
Objective Assessment ◽  
Video Quality ◽  
Rate Change ◽  
Frame Rate ◽  
Strong Impact ◽  
Video Advertising ◽  
The Impact

Abstract: An increasing number of services and facilities that are of interest to users is based on video streaming. Technical characteristics of video have a strong impact on the quality of a video streaming service and its perception by users. The most important measure of quality, which focuses on the user, is the Quality of Experience (QoE). Given that video advertising is a typical video streaming application, it is necessary to analyze the effect of the change of video characteristics on the QoE. This paper examines the impact of resolution and frame rate change on the QoE level by using objective and subjective QoE metrics. It also looks at the possibility of mapping the objective QoE metrics into subjective ones, if the QoE in Internet video advertising is analyzed. It was demonstrated that the values obtained by the objective assessment of quality can be mapped to the results obtained by subjective assessment of quality when the quality of experience of linear in- stream video ads is analyzed. The results indicate that temporal aspects of video quality assessment, e.g. influence of resolution and frame rate change to the level of the QoE, can be achieved by implementation of objective methods. Therefore, quality of experience can be improved by the proper selection of video characteristics values.

A Novel No-Reference Metric for Estimating the Impact of Frame Freezing Artifacts on Perceptual Quality of Streamed Videos

2018 ◽  
Vol 20 (9) ◽  
pp. 2344-2359 ◽  
Author(s):  
Muhammad Arslan Usman ◽  
Muhammad Rehan Usman ◽  
Soo Young Shin
Keyword(s):  
Perceptual Quality ◽  
The Impact
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