Explain frame buffer and video basics. Also, explain the terms pixel, aspect ratio, resolution.
Frame buffer :-
Frame buffer is a special area of memory in raster displays which is dedicated to graphics.
It holds the set of intensity values for all the screen points.
The stored intensity values are retrieved from frame buffer and displayed on the screen one row (scanline) at the time.
Each screen point is referred to as a pixel or pel (shortened forms of picture element).
Each pixel on the screen can be specified by its row and column number. Thus, by specifying row and column number we can specify the pixel position on the screen.
Video basics :-
Video or moving image in general, is created from a sequence of small images called frames.
By recording and then playing back frames in quick succession, an illusion of movement is created.
Video can be edited by removing some frames and combining sequences of frames, called clips, together in a timeline.
Pixel is the smallest part of the screen.
Each pixel has its own intensity, name or address by which we can control it.
Aspect ratio :-
An aspect ratio is an attribute that describes the relationship between the width and height of an image.
Aspect ratio is expressed by the symbolic notation i.e., x : y.
Resolution is defined as the number of pixels on the horizontal axis and vertical axis.
The sharpness of the image on the display depends on the resolution and size of the monitor.