Glossary of Video Terms
Terminology | Description |
---|---|
Compression Ratio (Data) |
A ratio of 1) the size of the uncompressed file to 2) the size of the file following compression. For example, a 14: 1 compression ratio means that the file is 14 times smaller than the size of the uncompressed recording. |
Digitisation |
This is the process of representing an analogue source as a discrete set of points (samples). As analog sources are continuous in all respects, digitized versions of them are approximations of the assumed values actually represented in the analogue original. |
DVD |
Optical storage format made ubiquitous in the delivery of standard definition digital video (encoded utilizing MPEG-2). Although DVDs are convenient, they are not recommended for long term preservation. |
File Format |
The type of file saved on a computer, usually a “container" that contains various streams of information. When dealing with audio,.wav. is the most common uncompressed format. For digital video, the more common formats include .mov. and .avi. |