scholarly journals Investigation of Quality of Experience Using ECG Features during Consumption of Audiovisual Content

2017 ◽  
Vol 9 (3) ◽  
pp. 340-344
Author(s):  
Vytautas Abromavičius
Keyword(s):  
Heart Rate ◽  
Quality Of Experience ◽  
Subjective Evaluation ◽  
Subjective Assessment ◽  
Video Content ◽  
Content Quality ◽  
Video Recordings ◽  
Multimedia Technologies ◽  
To Receive

Development of new multimedia technologies allows us to receive better quality of audio and video content. Quality of Experience (QoE) evaluates given content from the consumer’s perspective. This measurement allows to evaluate not only visual and audible quality, but also general acceptability of provided service. QoE evaluation is getting popular between engineers, designers, retailers who wants to provide high quality content for consumers. QoE is generally evaluated subjectively by surveys. It is possible to find relationship between physiological signals measured while user is consuming audiovisual content and make the subjective evaluation of this experience. This paper investigates relationship between heart rate and QoE while user is watching 1 min duration video recordings on three different devices. Heart rate was calculated as mean RR interval for each recording. Mean RR intervals of 0.848 s, 0.869 s and 0.884 s were calculated for low, medium and high QoE device configurations, respectively. ANOVA analysis results indicates a relation between heart rate and QoE level. The results can help to develop further the investigations of QoE level and heart rate relationship for various subjective assessment, device configurations and content provided.

scholarly journals Using supplementary video in multimedia instruction as a teaching tool to increase efficiency of learning and quality of experience

2014 ◽  
Vol 15 (3) ◽  
Author(s):  
Milos Ljubojevic ◽  
Vojkan Vaskovic ◽  
Srecko Stankovic ◽  
Jelena Vaskovic
Keyword(s):  
Teaching And Learning ◽  
Quality Of Experience ◽  
Subjective Assessment ◽  
Teaching Material ◽  
Video Content ◽  
Video Clips ◽  
Supplementary Video ◽  
Motivation For Learning ◽  
Is Integration

<p>The main objective of this research is to investigate efficiency of use of supplementary video content in multimedia teaching. Integrating video clips in multimedia lecture presentations may increase students’ perception of important information and motivation for learning. Because of that, students can better understand and remember key points of a lecture. Those improvements represent some important learning outcomes. This research showed that segmentation of teaching materials with supplementary video clips may improve lecture organization and presentation in order to achieve effective teaching and learning. The context of the video content and the position of supplementary video clips in teaching material are important influences on factors for motivation and efficiency of learning. This research presents the effects of the use of supplementary videos with different context of content (entertainment and educational) as well as the effects of their position within the teaching material. The experimental results showed that the most efficient method of use of supplementary video is integration with educational video content in the middle of a lecture. This position of video insertion provides the best results. The context of video content influences efficiency of learning also. Entertainment video was not as efficient as educational, but it can be used to engage and motivate students for learning. The given results have been confirmed with a subjective assessment of students’ quality of experience with different methods of embedding video clips.</p>

Quality of Experience vs. QoS in Video Transmission

2010 ◽  
pp. 352-376 ◽  
Author(s):  
André F. Marquet ◽  
Jânio M. Monteiro ◽  
Nuno J. Martins ◽  
Mario S. Nunes
Keyword(s):  
Communication Networks ◽  
Video Transmission ◽  
Quality Of Experience ◽  
Video Quality ◽  
Subjective Assessment ◽  
Ip Networks ◽  
Point Of View ◽  
Qos Parameters ◽  
Quality Video

In legacy television services, user centric metrics have been used for more than twenty years to evaluate video quality. These subjective assessment metrics are usually obtained using a panel of human evaluators in standard defined methods to measure the impairments caused by a diversity of factors of the Human Visual System (HVS), constituting what is also called Quality of Experience (QoE) metrics. As video services move to IP networks, the supporting distribution platforms and the type of receiving terminals is getting more heterogeneous, when compared with classical video distributions. The flexibility introduced by these new architectures is, at the same time, enabling an increment of the transmitted video quality to higher definitions and is supporting the transmission of video to lower capability terminals, like mobile terminals. In IP Networks, while Quality of Service (QoS) metrics have been consistently used for evaluating the quality of a transmission and provide an objective way to measure the reliability of communication networks for various purposes, QoE metrics are emerging as a solution to address the limitations of conventional QoS measuring when evaluating quality from the service and user point of view. In terms of media, compressed video usually constitutes a very interdependent structure degrading in a non-graceful manner when exposed to Binary Erasure Channels (BEC), like the Internet or wireless networks. Accordingly, not only the type of encoder and its major encoding parameters (e.g. transmission rate, image definition or frame rate) contribute to the quality of a received video, but also QoS parameters are usually a cause for different types of decoding artifacts. As a result of this, several worldwide standard entities have been evaluating new metrics for the subjective assessment of video transmission over IP networks. In this chapter we are especially interested in explaining some of the best practices available to monitor, evaluate and assure good levels of QoE in packet oriented networks for rich media applications like high quality video streaming. For such applications, service requirements are relatively loose or difficult to quantify and therefore specific techniques have to be clearly understood and evaluated. By the mid of the chapter the reader should have understood why even networks with excellent QoS parameters might have QoE issues, as QoE is a systemic approach that does not relate solely to QoS but to the ensemble of components composing the communication system.

scholarly journals Fundamental life motivations and prerequisites for their realization in young men

2018 ◽  
Vol 20 (1) ◽  
pp. 154-159
Author(s):  
I M Ulyukin ◽  
N M Pilnik ◽  
V N Emelyanov ◽  
V N Bolekhan ◽  
E S Orlova ◽  
...  
Keyword(s):  
Subjective Evaluation ◽  
Young Men ◽  
Direct Methods ◽  
Subjective Assessment ◽  
Psychosocial Adaptation ◽  
Existential Crisis ◽  
Professional Health ◽  
Self Transcendence ◽  
The Right

Аbstract. Quality of life of young men in the view of existential compliance is considered. In its most general form, the term «existence» means «specifically human way of being», the main characteristic of which is the freedom of choice, that is the way of being a person, when he is constantly in a situation that asks him: «How does a man will be a person in this situation?». А person’s subjective assessment of his life was investigated by the technique of A. Langle and K. Orgler «Scale of Existence» in 42 practically healthy young men (24,12±1,1 years). Scores diagnosed on such scales as Self-distancing, Self-Transcendence, Freedom, Responsibility, Personality, Existentiality, and Fulfillment testify to the absence of grounds for the development of existential crisis (for a crisis of subjective evaluation of one’s own life). Thus, with the right medical and psychological support of young people, they have the ability to cope with themselves and with the world, and the feasibility of interaction with the internal and external demands and proposals presented to circumstances, correlating with their own values. At the same time, one should keep in mind that a possible conflict can lead to nervous breakdowns, decrease in the level of professional health (a professional fitness). In order to prevent this, it is necessary to identify persons at risk and prevent possible psychosocial adaptation disorders in advance, using direct methods of psychodiagnostic. To this end, both methods of psycho-counseling and solving personal problems through the provision of advice or other assistance are recommended.

scholarly journals Multimedia Quality of Experience (QoE): Current Status and Future Direction

2020 ◽  
Vol 12 (7) ◽  
pp. 121 ◽  
Author(s):  
Chaminda Hewage ◽  
Erhan Ekmekcioglu
Keyword(s):  
User Satisfaction ◽  
Quality Of Experience ◽  
Practical Importance ◽  
Multimedia Applications ◽  
Current Status ◽  
Significant Research ◽  
Multimedia Technologies ◽  
Future Direction ◽  
Technical Measures

Quality of Experience (QoE) is becoming an important factor of User-Centred Design (UCD). The deployment of pure technical measures such as Quality of Service (QoS) parameters to assess the quality of multimedia applications is phasing out due to the failure of those methods to quantify true user satisfaction. Though significant research results and several deployments have occurred and been realized over the last few years, focusing on QoE-based multimedia technologies, several issues both of theoretical and practical importance remain open. Accordingly, the papers of this Special Issue are significant contribution samples within the general ecosystem highlighted above, ranging from QoE in the capture, processing and consumption of next-generation multimedia applications. In particular, a total of five excellent articles have been accepted, following a rigorous review process, which address many of the aforementioned challenges and beyond.

Emotional Aspects and Quality of Experience for Multifactor Evaluation of Audiovisual Content

2014 ◽  
Vol 2 (4) ◽  
pp. 40-61 ◽  
Author(s):  
George Kalliris ◽  
Maria Matsiola ◽  
Charalampos Dimoulas ◽  
Andreas Veglis
Keyword(s):  
Quality Of Experience ◽  
Communication Process ◽  
Emotional Impact ◽  
Mediated Learning ◽  
Audiovisual Communication ◽  
Mediated Communication ◽  
Content Quality ◽  
Communication Efficiency ◽  
Emotional Aspects

The present paper investigates multifactor audiovisual-content quality evaluation strategies, in mediated communication. The primary aims of the work are to identify, describe and model the mechanisms that the attributes of source content and its encoding properties influence the communication process and the involved emotional aspects in terms of Quality of Experience (QoE), information perception and understanding. Mediated learning constitutes a demanding thus suitable investigation case-study, where communication efficiency can be monitored with the use of applicable Quality of Learning (QoL) parameters, such as the learning outcome and its relation to the prior knowledge status. Real-world e-learning scenarios are utilized for sentiment analysis tests combined with QoE/QoL evaluation, using both subjective scores and perceptually-adapted metrics. This experimental research attempts to monitor communication efficiency and its relation to the quality and emotional impact of the mediated content, offering new insights in mediated learning and broader audiovisual communication services.

The relationship between the experience of negative feelings and quality of life and the socio-demographical factors of patients treated for spinal discopathy of the lumbar spine

2021 ◽  
Vol 19 (1) ◽  
pp. 93-104
Author(s):  
Joanna Girzelska ◽  
Leszek Chomicki
Keyword(s):  
Quality Of Life ◽  
Lumbar Spine ◽  
Marital Status ◽  
Subjective Evaluation ◽  
Subjective Assessment ◽  
Survey Method ◽  
Significant Deterioration ◽  
Negative Feelings ◽  
The Relationship

Most of the pathological changes in the spine begin with the physiological loss of intervertebral disc function. Discopathy of the lumbar spine leads to a significant deterioration in the quality of life, which is why the therapeutic team strives is to improve patients quality of life through actions aimed at reducing spinal dysfunction to an extent that allows for human functioning. The research aim was to determine the quality of life of patients who had been treated as a result of discopathy of the lumbar spine and to establish the relationship between the experience of negative feelings and a subjective assessment of the quality of life with factors resulting frompatient socio-demographics. The study included 110 patients treated for lumbar discopathy. A diagnostic survey method was employed as a research technique, with the use of a proprietary survey questionnaire. Statistic analysis of the results was performedusing the statistical package PQStat v1.6.6. Subjective evaluation of patients quality of life in 66 persons (60%) was at an average level, only 6 (5.45%) respondents rated the quality of their lives as being higher. Those living in towns of up to 50,000 residents rated their quality of life higher (6.21), with the lowest level being reported by those living in the countryside (4.95). Age did not influence significantly the quality of life, but older people most often experienced pain (p=0.4). Analysis of variance did not show statistically significant differences between marital status and respondent quality of life (p = 0.53) but did show significant differences between education levels and the incidence of negative feelings such as fear, anxiety or depression. Socio-demographic variables: such as gender, age and marital status do not significantly differentiate the quality of life of the respondents. There is a relationship between experiencing negative feelings and educational levels. The lower the education level obtained, the more often negative feelings are experienced. The experiencing of negative feelings and disease duration are variables that reduce the quality of life of respondents.

Impact of video content and transmission impairments on quality of experience

2016 ◽  
Vol 75 (23) ◽  
pp. 16461-16485 ◽  
Author(s):  
Pradip Paudyal ◽  
Federica Battisti ◽  
Marco Carli
Keyword(s):  
Quality Of Experience ◽  
Video Content ◽  
Transmission Impairments
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