Monday, 12 September 2011

Glossary of Terms

1. Video Formats, eg. mov. avi - There are different layers of video transmission and storage, each with its own set of formats to choose from. MOV is a file extension used by the QuickTime-wrapped files. AVI means Audio Video Interleave, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows technology
2. Streaming - Streaming media is multimedia that is constantly received by and presented to an end-user while being delivered by a streaming provider.bThe name refers to the delivery method of the medium rather than to the medium itself. The distinction is usually applied to media that are distributed over telecommunications networks, as most other delivery systems are either inherently streaming (e.g., radio, television) or inherently non-streaming (e.g., books, video cassettes, audio CDs). The verb 'to stream' is also derived from this term, meaning to deliver media in this manner. Internet television is a commonly streamed medium. It's normally a live event from Youtube, Social sites and more.
3. File Compression - File compression is commonly used when sending a file from one computer to another over a connection that has limited bandwidth.
4. Aspect ratios: 4:3, 16:9 - The aspect ratio of an image is the ratio of the width of the image to its height, expressed as two numbers separated by a colon. In still camera photography, the most common aspect ratios are 4:3, 3:2, and more recently being found in consumer cameras 16:9.
5. Frame rates - Frame rate (also known as frame frequency) is the frequency (rate) at which an imaging device produces unique consecutive images called frames. The term applies equally well to computer graphics, video cameras, film cameras, and motion capture systems. Frame rate is most often expressed in frames per second (FPS)
Higher frame rates, including 300 FPS, have been tested by BBC Research over concerns with sports and other broadcasts where fast motion with large HD displays could have a disorientating effect on viewers. 300 FPS can be converted to both 50 and 60 FPS transmission formats without major issues.

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