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Using Multivariate Statistics

The measurement of meaning

A wide variety of media can be used in learning, including distance learning, such as print, lectures, conference sections, tutors, pictures, video, sound, and computers. Any one instance of distance learning will make choices among these media, perhaps using several.

Multimedia in Learning

An overview of the self-organizing map algorithm, on which the papers in this issue are based, is presented in this article.

The Self-Organizing Map

With digital equipment becoming increasingly networked, either on wired or wireless networks, for personal and professional use alike, distributed software systems have become a crucial element in information and communications technologies. The study of these systems forms the core of the ARLES' work, which is specifically concerned with defining new system software architectures, based on the use of emerging networking technologies. In this context, we concentrate on the study of distributed systems which bring to life the vision of ubiquitous computing systems, also known as ambient intelligence.

반도체 공정 overview

Cloud Gaming (CG) is an immersive multimedia service that promises many benefits. In CG, the games are rendered in a cloud server, and the resulted scenes are streamed as a video sequence to the client. Using CG users are not forced to update their gaming hardware frequently, and available games can be played on any operating system or suitable device. However, cloud gaming requires a reliable and low-latency network, which makes it a very challenging service. Transmission latency strongly affects the playability of a cloud game and consequently reduces the users' Quality of Experience (QoE). In this paper, we propose a latency compensation technique using game adaptation that mitigates the influence of delay on QoE. This technique uses five game characteristics for the adaptation. These characteristics, in addition to an Aim-assistance technique, were implemented in four games for evaluation. A subjective study using 194 participants was conducted using a crowdsourcing approach. The results showed that the majority of the proposed adaptation techniques lead to significant improvements in the cloud gaming QoE.

A latency compensation technique based on game characteristics to mitigate the influence of delay on cloud gaming quality of experience

The aim of this paper is to analyze the perceptual quality dimensions of state-of-the-art text-to-speech systems (TTS). Therefore, several pretests were conducted to determine a suitable set of attribute scales. The resulting 16 scales were used in a semantic differential on a diverse database containing 16 different TTS systems. A subsequent multidimensional analysis (Principal Axis Factor analysis with Promax rotation) resulted in three underlying quality dimensions. They were labeled naturalness, disturbances, and temporal distortions. A mapping of these factors onto the perceived overall quality revealed that naturalness contributes the most to the quality of TTS signals. Index Terms: speech synthesis, quality dimensions, multidimensional analysis

Perceptual Quality Dimensions of Text-to-Speech Systems.

In the area of Quality of Experience (QoE), one challenge is to design test methodologies in order to evaluate the perceived quality of multimedia content delivered through technical sys-tems. Trad ...

/pdf/review-on-using-physiology-in-quality-of-experience-1ja86iutxz.pdf

Review on using physiology in quality of experience

Evaluating the speech output component of a smart-home system

This paper investigates multi-modal aspects of audiovisual quality assessment for interactive communication services. It shows how perceived auditory and visual qualities integrate to an overall audiovisual quality perception in different experimental contexts. Two audiovisual experiments are presented and provide experimental data for the present analysis. First, two experimental contexts are compared, i.e., passive ‘viewing and listening’ and interactive, with regard to their impact on the audiovisual qualities as subjectively perceived by the user. Second, the effects of cross-modal interactions on the assessment of the audio and video qualities are measured for those experimental contexts. The results are compared to the ones found in the literature revealing both similarities and differences in terms of magnitude and also in which cases they occur. Third, the impact of the conversational scenario on the assessment of the auditory and visual qualities is investigated. Finally, results from the literature related to audiovisual integration are gathered by the type of application. A general integration function is proposed for each category, and the performances of these ‘application-oriented’ models demonstrate a direct gain in prediction.

/pdf/audiovisual-quality-integration-for-interactive-g3nrvonx9y.pdf

Sebastian Möller

Papers

A latency compensation technique based on game characteristics to mitigate the influence of delay on cloud gaming quality of experience

Perceptual Quality Dimensions of Text-to-Speech Systems.

Review on using physiology in quality of experience

Evaluating the speech output component of a smart-home system

Audiovisual quality integration for interactive communications