Low-bandwidth multimedia tools for Web-based lecture publishing

A new technique has been developed in the last decade in the field of multimedia producing. It involves data streaming technology that is capable to provide audiovideo high rate encoding and real-time deploying of multimedia content over a network. In this paper we present main concepts of audio-video data streaming and also the VPG application we have developed. VPG application is a graphical interactive platform that allows development of data streaming multimedia presentations that can be watched live through Internet. The difference between VPG and other international products of this category consists of modularity and efficiency in using multiple interactive capabilities. It provides also different facilities for dedicated domains as education, commercial presentations and advertising.

2020

This work creates unlimited privileges for academic users to access videos and audio contents for educational, entertainment, advertisement and other purposes. It allows users to become fully absorbed in its multimedia content by utilizing a variety of multimedia elements such as audio and video elements and its technologies. It creates a support for user reaction, it also provides statistical support to track the period when users listened to an audio or video content. It also provides a functionality for representing speech from audio or video content in text.

Proceedings 22nd International Conference on Distributed Computing Systems Workshops

Lecture-on-Demand (LOD) multimedia presentation technologies among the network are most often used in many communication services. Examples of those applications include video-on demand, interactive TV and the communication tools on a distance learning system and so on. In this paper, we describe how to present different multimedia objects on a web-based presentation system. The distributed approach is based on an extended timed Petri net model. Using characterization of extended media streaming technologies, we developed a Web-based Multimedia Presentation System. For a real-world example, suppose a well-known teacher is giving a lecture/presentation to his student. Because of time constraints and other commitments, many students cannot attend the presentation. The main goal of our system is to provide a feasible method to record and represent a lecture/presentation in the air. Using the browser with the windows media services allows those students to view live video of the teacher giving his speech, along with synchronized images of his presentation slides and all the annotations/comments. In our experience, this very approach is sufficient to the use of distance learning environment.

American journal of health-system pharmacy : AJHP : official journal of the American Society of Health-System Pharmacists, 2003

2003

The experimental tools for multimedia-supported interactive lecture presented in this paper have as their main goal to improve the quality of the presence lecture by using state-of-the-art presentation tools and wireless infrastructure communication techniques. Thus, the lecture is enriched with multimedia and computer-supported interaction between students and teacher, in order to improve their motivation and efficiency. Quizzes and immediate feedback to the lecturer through a server give the students the chance to adapt the lecture to their learning capabilities and to increase their attention and motivation. They are also enabled to give additional feedback via messages to the teacher. The results of the evaluation of the interactive lecture will show the success of our approach.

2008 38th Annual Frontiers in Education Conference, 2008

For more than a decade, the RIPPLES group at the University of Massachusetts Amherst has developed and deployed content delivery systems to support on-campus and distance education. This has been an effective but expensive approach because of its dependence on content captured by human operators and substantial production effort. Presentations Automatically Organized from Lectures (PAOL) is a classroom-capture system that is transparent to and places no constraints (teaching style or pedagogy) on a lecturer. PAOL is unique-no other system can capture unconstrained computer-based materials, capture whiteboard writing and drawing, and produce a speaker video without requiring preinstalled software, electronic whiteboards, or special training. PAOL uses highresolution cameras, a computer screen capture device, and a wireless microphone to automatically create multimedia Flash presentations, which include a digitally edited instructor video, enhanced images of all material presented by computer or written/drawn on a whiteboard, and an index to support navigation. The PAOL system has been used extensively during system development in several varied settings. We report on usability studies to determine the most effective presentation formats and interfaces and our efforts to capture a full course to further evaluate the impact on teaching and learning.

2007

An advanced multimedia lecture recording system is presented in this paper. The purpose of our system is to capture multimodal information that can be received only when lectures are being held in a classroom where a teacher and students share the same time and space. The system captures not only hand-writings and slide switching intervals but also audio and video of the people with their spatial location information. These recorded media will be served to users in distance learning process. We designed the system so that it does not interfere classes. It can archive lectures while they hold classes on regular basis and generate multimedia archive automatically. Teachers are neither asked to remain at a certain place nor wired with devices they would have to put on. We have implemented our approach and our lecture archive system currently works for six classes per week, since October, 2002.

The rapid expansion of the Internet has finally brought a wider availability of large bandwidth connections reaching the homes. This means that the content that can be delivered through the Internet is dramatically changing. We run an experiment of eight whole university courses: we web-cast the lectures, and also we made them asynchronously available both on-line and off-line (on CD's). We based our experiment two software systems: the first one, called e-Presence, was developed at the University of Toronto, ...

… in Education, 2002

There are various software technologies that allow capture and redelivery of lectures. Most of these technologies however rely on the use of proprietary software, often requiring extra efforts from the lecturer in terms of the initial preparation of the lecture material, or in editing and annotating after the lecture to make the material suitable for the students. To review the material students then require access to the proprietary software. This paper describes a system for the lightweight capture of lecture presentations, based on the use of a low-cost large interactive display surface, together with standard Microsoft PowerPoint™ presentation software. The captured version of the presentation includes the original lecture slides, graphical annotations made by the lecturer during the lecture, and the audio recording of the lecture; all saved as a PowerPoint file. In addition, the system adds some annotations and index slides to allow quick and easy access to different segments of the presentation. Presentations can be replayed in part or in full as required, preserving all of the content of the live lecture.