What is Digital Video
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Posted By nehakarwal
What is Digital Video:
Digital video is an electronic representation of moving visual images or video in the form of encoded digital data. This is in contrast to analog video, which represents moving visual images in the form of analog signals.
For video to be played and processed in computers it needs to be converted from analog to digital representation.
There are two kinds of possible digitization or digital coding-Composite coding and component coding. In composite coding, all signal components taken together as a whole are converted into digital format. In component coding, each signal component is digitized separately using different sampling frequencies (13.5 MHz for luminance, 6.75 MHz for chrominance).
Advantages of Digital Video:
- Storing video on digital devices memory ready to be processed, (noise removable, cut and paste, size and motion control, and so on) and integrated into the various multimedia applications is possible.
- It allows direct access, which makes non-linear video editing (audio mixing, adding text, titles, and digital effects, etc.) is simple.
- It allows repeated recording without degradation of image quality.
- Ease of encryption and better tolerance to channel noise is possible.
