If I ask you to remember 50 points right now, how many will you remember the same time tomorrow? How about in a week? The human mind filters information in order to deal with its surroundings. On average, you will only retain about 20% of what you hear after a few days. For a university student, this can be catastrophic when studying for an exam. Of course, they have lecture notes to fill in the gaps. But the best way to remember information is to hear it first hand again. The only way to do this is to record the lecture.
Lecture recording can be defined as the process of capturing the audio and visual components of a lecture, digitizing, storing, and distributing them. There exist two kinds of lecture recording – synchronous and asynchronous. Synchronous recording is when at the time of recording, the lecture is also broadcast live to its audience. Asynchronous recording, on the other hand, when the lecture is recorded, archived, and can only be accessed after the recording has been made.
Two main components make up the lecture recording process – hardware components and software components. The hardware must work in synergy with the software to provide an effective recording and broadcasting service to the audience.
The hardware component consists of the capture equipment, the server/repository, and the viewing equipment. Generally, the capture equipment consists of a microphone input, a video input, and a DVI/VGA frame grabber. Devices, such as the Lecture Recorder, capture these three analog signals, digitize them, and send them over the Internet or LAN to the server or repository. At the server, all three signals are synchronized and produced. Finally, viewers are able to connect to the server (usually via the Internet) and access any of the recordings made.
The software component makes up the software installed on the Lecture Recorder itself, the server, and the viewer’s computers. Modern techniques in OCR (optical character recognition), fast indexing, and video compression allow lecture recording platforms to contain many of the elements found in today’s Web 2.0 environment.
As such, lecture recording, while not completely replacing physical lecture attendance, is becoming a key tool and learning aid with students who need to review a lecture after they have attended it or if they missed it. Lecture Recorders make students’ lives easier, while at the same time creating an archive of all lectures for accountability and educational purposes.
Contributing author – Source. Image shown under creative commons share alike licence – source
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