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Video represents a sequence of static images (called "frames") representing snapshots of a scene in motion, taken at regularly-spaced intervals of time, typically ranging from about 24 to 60 frames per second. Apart from the frame rate, other important properties of a video are the resolution and color depth of the individual images.
Description[]
Unlike analog broadcast television, digital video on a computer or network typically uses data compression. Compression is even more important for video than for static images due to the large amount of data involved, even in a short video. Furthermore, compression allows video to be transmitted via a channel whose bandwidth is less than the raw data rate implied by the resolution and frame rate. This allows the recipient to start displaying the video before the transmission is complete, a process known as streaming.
Digital video data is often stored and shared in a compressed format like MPEG or H.264 that includes synchronized sound. Compression can be relatively slow but decompression is done in real-time with the picture quality and frame rate varying with the processing power available and the size and scaling of the picture.[1]
Examples[]
There are many types of software for displaying video on computers, including QuickTime from Apple Computer, Windows Media Player from Microsoft, DivX, RealPlayer, and VLC.[1]
References[]
- ↑ 1.0 1.1 Video at the Free On-Line Dictionary Of Computing. 1994-12-13.
See also[]
External links[]
- Video at Wikipedia
