The need to better understand the role of context has emerged after revolution mobile computing, as such devices are used in heterogeneous circumstances. However, it is difficult say what use human-computer interaction actually means. This study summarises past research contexts and not only provides a deeper understanding characteristics associated with it, but also indicates path for future research. article presents an extensive systematic literature review more than 100 papers published...

Subjective quality evaluation is used to optimize the produced audiovisual from fundamental signal processing algorithms consumer services. These studies typically follow basic principles of controlled psychoperceptual experiments. However, when compromising compression and transmission parameters for services, ecological validity conventional methods can be questioned. To tackle this, we firstly present a novel user-oriented method mobile television in its usage contexts. Secondly, results...

Force feedback and shape change are modalities with a growing application potential beyond the more traditional GUIs. We present two studies that explored effect of these on emotional experience when interacting an intelligent thermostat. The first study compared visual feedback, force combination change. Results indicate correlates to experienced dominance during interaction, while mainly affects arousal. second how could communicate affective meaning interaction thermostat through...

A long process has been undertaken to develop the technology of 3D video for consumer products, but studies determine needs and expectations actual users have disregarded. The object this study is examine users' needs, requirements mobile television video. We conducted three user applying triangulation methodology extensive survey, focus groups probe identify requirements. results are presented in form guidelines which highlight characteristics users, system service required including what...

Subjective evaluation is used to identify impairment factors of multimedia quality. The final quality often formulated via quantitative experiments, but this approach has its constraints, as subject's interpretations, experiences and criteria are disregarded. To these factors, study examined qualitatively the participants evaluate audiovisual video A semi-structured interview was conducted with 60 after a subjective experiment. assessment compared several, relatively low audio-video bitrate...

Subjective quality evaluation is widely used to optimize system performance as a part of end-products. It often desirable know whether certain acceptable, that is, the reaches minimum level satisfy user expectations and needs. The goal this paper examine research methods for assessing overall acceptance in subjective methods. We conducted three experiments develop our methodology test its validity under heterogeneous stimuli context mobile television. first experiment examined possibilities...

Subjectively perceived video quality is a critical factor when adopting new mobile applications. When used in networks the most important requirements are related to low bitrates, framerates and screen size of device. In two tests we investigated effects codecs combinations audio streams with bitrates different contents on devices. The first test showed that codec H.264 produced satisfying quality, but was not high enough for presentation textual information. second test, audio-video ratio...

To quantify the excellence of multimedia quality, subjective evaluation experiments are conducted. In these experiments, tradition quantitative assessment is most dominating, but it disregards understanding participants' interpretations, descriptions, and criteria quality. The goal this paper to present a new quality method called Open Profiling Quality (OPQ) as tool for building deeper on OPQ mixed combining conventional psychoperceptual qualitative descriptive based individual's own...

In user experience studies, researchers' aim is to understand how the used system, user's state and context influence experience. Despite existing general guidance conduct studies in real life contexts a variety of field study methods for investigating experience, specific comprehensive capturing data about circumstances that affect missing. this paper, we present best practices taking characteristics into account conducted mobile ubiquitous contexts. Based on literature review insights from...

Quality of experience web services is negatively influenced by system delays. To quantify delay and resulting user satisfaction quality evaluation experiments are used, but they typically disregards users' tasks content the website as a part assessment procedure. The goal this study to explore impact user's task, information presentation such per-element load durations page strategies on Experience. We conducted an experimental with 25 participants. results underline importance designing...

Perceptual quality evaluation experiments are used to assess the excellence of multimedia quality. However, these studies disregard qualitative experiential descriptions, interpretations, and impressions The goal this paper is identify general descriptive characteristics experienced 3D video on mobile devices. We conducted five in which data was collected after psychoperceptual experiment. Qualitative semi-structured interviews written attribute description tasks were with over 90 naive...

Empathy is significant in nursing, and showing empathy toward a patient positively impacts patient's health. Learning through immersive simulations effective. Immersion an essential factor virtual reality. This study aimed to describe nursing students' experiences of reality simulation game. Data were collected from students (n = 20) May 2021 January 2022. collection included individual semistructured interviews; before the interviews, gaming procedure was conducted. Inductive content...

As in many digital telecommunications systems, the received data streams over Digital Video Broadcasting for Handhelds (DVB-H) may contain bursty transmission errors. The error characteristics affect end users' perceived audiovisual quality. This study examined unacceptability of instantaneous but noticeable audio, visual and erroneous were generated from four popular television contents by applying three simulated patterns with different rates (1.7%, 6.9%, 13.8%) burst durations....

The paper discusses methods for robust audio-video broadcast over the digital video broadcasting-handheld (DVB-H) system. DVB-H includes a link-layer forward error correction (FEC) scheme known as multiprotocol encapsulation (MPE) FEC, which provides equal protection (EEP) to transmitted media streams. Several approaches unequal (UEP) have been proposed in literature, and applicability of some them is analyzed paper. A UEP method based on priority segmentation streams chosen more detailed...

Visual comfort is one of the factors 3D experience. The goal this paper to evaluate simulator sickness as a part five different video quality evaluation studies. experiments are conducted using three dual-view autostereoscopic mid-sized and small mobile screens with varying constructed levels, under lengths viewing, total 200 participants. questionnaire (SSQ) was used in data-collection pre- post-immersion. results showed only short term increase symptoms after exposure four studies...

A European consortium of six partners has been developing core technological components a mobile 3D television system over DVB-H channel. In this overview paper, we present our current results on optimal methods for stereo-video content creation, coding and transmission emphasize their significance the power-constrained platform, equipped with auto-stereoscopic display. We address user requirements by applying modern usercentered approaches taking into account different groups usage contexts...

Mobile 3D television is a new form of media experience, which combines the freedom mobility with greater realism presenting visual scenes in 3D. Achieving this combination challenging task as viewing experience has to be achieved limited resources mobile delivery channel such bandwidth and power constrained handheld player. This challenge sets need for tight optimization overall 3DTV system. Presence depth compression artifacts played video are two major factors that influence viewer's...

The aim of this study is two-fold; first, to compare how certain visual aids contribute in depth estimation tasks on a portable autostereoscopic display; and second, these cues impact perceived quality. These were studied quantitative subjective using display controlled laboratory environment. Test participants evaluated object depths three-dimensional images, where either 2D cues, 3D or their combinations provided. was conducted three different compression levels order image quality affects...

In the product development of services it is important to adjust mobile video quality according requirements potential users. Therefore, a careful participant selection very important. However, in literature details are often handled without great detail. This also reflected handling experimental results, where impact psychographic factors on rarely reported. As user attributes potentially have large effect we investigated role various psychographical variables subjective evaluation...

Subjective audiovisual quality is typically phrased via quantitative experiments as a preference order of predefined variables. However, the produced not in 1:1 ratio to perceived because human active interpretation and complexity multi-modality perceptual processes. This study presents qualitatively collected experience factors connects these expressions results understand relation between experienced context interactive application systems.