The impact of screen resolution of HMD on perceptual quality of immersive videos

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.

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

IEEE Transactions on Multimedia ◽

10.1109/tmm.2018.2801722 ◽

2018 ◽

Vol 20 (9) ◽

pp. 2344-2359 ◽

Cited By ~ 6

Author(s):

Muhammad Arslan Usman ◽

Muhammad Rehan Usman ◽

Soo Young Shin

Keyword(s):

Perceptual Quality ◽

The Impact

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A Framework for QoE-Aware 3D Video Streaming Optimisation over Wireless Networks

Mobile Information Systems ◽

10.1155/2016/4913216 ◽

2016 ◽

Vol 2016 ◽

pp. 1-18 ◽

Cited By ~ 3

Author(s):

Ilias Politis ◽

Asimakis Lykourgiotis ◽

Tasos Dagiuklas

Keyword(s):

Machine Learning ◽

Wireless Networks ◽

Heterogeneous Wireless Networks ◽

Video Quality ◽

Three Dimensional ◽

Perceptual Quality ◽

Test Bed ◽

User Terminal ◽

The Impact

The delivery of three-dimensional immersive media to individual users remains a highly challenging problem due to the large amount of data involved, diverse network characteristics, and user terminal requirements, as well as user’s context. This paper proposes a framework for quality of experience-aware delivering of three-dimensional video across heterogeneous wireless networks. The proposed architecture combines a Media-Aware Proxy (application layer filter), an enhanced version of IEEE 802.21 protocol for monitoring key performance parameters from different entities and multiple layers, and a QoE controller with a machine learning-based decision engine, capable of modelling the perceived video quality. The proposed architecture is fully integrated with the Long Term Evolution Enhanced Packet Core networks. The paper investigates machine learning-based techniques for producing an objective QoE model based on parameters from the physical, the data link, and the network layers. Extensive test-bed experiments and statistical analysis indicate that the proposed framework is capable of modelling accurately the impact of network impairments to the perceptual quality of three-dimensional video user.

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The Impact of Stalling on the Perceptual Quality of HTTP-based Omnidirectional Video Streaming

ICASSP 2019 - 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) ◽

10.1109/icassp.2019.8683160 ◽

2019 ◽

Cited By ~ 1

Author(s):

Wei Zhang ◽

Wenjie Zou ◽

Fuzheng Yang

Keyword(s):

Video Streaming ◽

Perceptual Quality ◽

The Impact

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Perceptual quality of neighbourhood design and feelings of unsafety

Ageing and Society ◽

10.1017/s0144686x12000207 ◽

2012 ◽

Vol 33 (6) ◽

pp. 917-937 ◽

Cited By ~ 15

Author(s):

LIESBETH DE DONDER ◽

TINE BUFFEL ◽

SARAH DURY ◽

NICO DE WITTE ◽

DOMINIQUE VERTÉ

Keyword(s):

Later Life ◽

Perceptual Quality ◽

Ageing Society ◽

Spatial Features ◽

Starting Point ◽

Using Data ◽

Physical Features ◽

The Impact ◽

The Relationship

ABSTRACTThis paper takes the quality of life in the neighbourhood as a starting point and appeals to the framework of Age-friendly Cities to gain insights in how ‘the neighbourhood as a physical surrounding’ can either promote or hinder feelings of unsafety in later life. It examines the impact of the perceived design of the neighbourhood on feelings of unsafety in later life. Literature on the relationship between feelings of unsafety and the neighbourhood mainly concentrates on incivilities and disorder. Other physical-spatial features of the neighbourhood are rarely taken into consideration. Using data generated from the Belgian Ageing Studies (N=25,980) multivariate analyses indicate that a neighbourhood which is perceived to be physically adapted to the needs of older people (in terms of accessibility and distance to services) heightens feelings of safety. The findings demonstrate the need to reduce behaviour constraints by redesigning fear-related physical features. This conclusion raises practical implications and formulates a number of policy recommendations to tackle feelings of unsafety in an ageing society.

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Self-Compassion and Quality of Life in Adults Who Stutter

American Journal of Speech-Language Pathology ◽

10.1044/2020_ajslp-20-00055 ◽

2020 ◽

Vol 29 (4) ◽

pp. 2097-2108

Author(s):

Robyn L. Croft ◽

Courtney T. Byrd

Keyword(s):

Quality Of Life ◽

Social Connectedness ◽

The Self ◽

Future Research ◽

Self Compassion ◽

Adults Who Stutter ◽

And Gender ◽

Relationship Of ◽

The Impact

Purpose The purpose of this study was to identify levels of self-compassion in adults who do and do not stutter and to determine whether self-compassion predicts the impact of stuttering on quality of life in adults who stutter. Method Participants included 140 adults who do and do not stutter matched for age and gender. All participants completed the Self-Compassion Scale. Adults who stutter also completed the Overall Assessment of the Speaker's Experience of Stuttering. Data were analyzed for self-compassion differences between and within adults who do and do not stutter and to predict self-compassion on quality of life in adults who stutter. Results Adults who do and do not stutter exhibited no significant differences in total self-compassion, regardless of participant gender. A simple linear regression of the total self-compassion score and total Overall Assessment of the Speaker's Experience of Stuttering score showed a significant, negative linear relationship of self-compassion predicting the impact of stuttering on quality of life. Conclusions Data suggest that higher levels of self-kindness, mindfulness, and social connectedness (i.e., self-compassion) are related to reduced negative reactions to stuttering, an increased participation in daily communication situations, and an improved overall quality of life. Future research should replicate current findings and identify moderators of the self-compassion–quality of life relationship.

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Surgery for Lung Cancer and the Consequences for the Swallow

Perspectives of the ASHA Special Interest Groups ◽

10.1044/persp1.sig13.162 ◽

2016 ◽

Vol 1 (13) ◽

pp. 162-168

Author(s):

Pippa Hales ◽

Corinne Mossey-Gaston

Keyword(s):

Lung Cancer ◽

Treatment Options ◽

Vocal Cord Palsy ◽

Subsequent Treatment ◽

Physiological Reserve ◽

Palliative Phase ◽

And Function ◽

The Impact ◽

Swallow Function

Lung cancer is one of the most commonly diagnosed cancers across Northern America and Europe. Treatment options offered are dependent on the type of cancer, the location of the tumor, the staging, and the overall health of the person. When surgery for lung cancer is offered, difficulty swallowing is a potential complication that can have several influencing factors. Surgical interaction with the recurrent laryngeal nerve (RLN) can lead to unilateral vocal cord palsy, altering swallow function and safety. Understanding whether the RLN has been preserved, damaged, or sacrificed is integral to understanding the effect on the swallow and the subsequent treatment options available. There is also the risk of post-surgical reduction of physiological reserve, which can reduce the strength and function of the swallow in addition to any surgery specific complications. As lung cancer has a limited prognosis, the clinician must also factor in the palliative phase, as this can further increase the burden of an already compromised swallow. By understanding the surgery and the implications this may have for the swallow, there is the potential to reduce the impact of post-surgical complications and so improve quality of life (QOL) for people with lung cancer.

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