Video technology

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Video formats:

Resolution:  The resolution of a T.V., Computer monitor or Display device is the number of distinct pixels in each dimension that can be displayed. It is usually quoted as Width x Height, e.g

 

1024 x 768 means width is 1024 pixels and Height is 768 pixels.

The eye’s perception of display resolution can be affected by number of factors such as image resolution and optical resolution. One factor is the display screen’s rectangular shape, which is expressed as ratio of physical picture width to physical picture height. This is called as Aspect ratio. An array of 1280 x 720 on a 16:9 display has square pixels, but an array of 1024 x 768 on a 16:9 display has oblong pixels.

Video is a sequence of images displayed in a pattern as we see in animation. The number of frame per second is called as Frame rate which is used to measure quality of video. Higher the frame rate better or smoother motion.

*NTSC (National Television and Standard Committee) is the video standard used in America and Japan.

*PAL (Phase Alternating Lines) is used in Europe, Australia, and Middle East.

*NTSC video usually runs at 30 FPS (frame per second) with 525 lines and 6MHZ spacing.

*PAL usually runs at 25 FPS (frame per second) with 625 lines and 5MHZ spacing.

*NTSC video usually runs at 720 x 486 pixel format whereas PAL runs at 720 x 576 pixels.

Common resolution and mega pixel:

640 x 480 – 0.3 MP-VGA Video

1024 x 768 – 0.8 MP-XGA Video

1280 x 960 – 1MP

1366 x 768 – 1MP- Laptop Display

1600 x 1200-2MP-UXGA Video

2048 x 1536-3MP-QXGA

 

Common Aspect ratio:

4:3 Old Computer monitor

16:9-widescreen (1920 x 1080 HD Video and best for computer display.

256:135-(4096 x 2160-4k standard).

16:9 aspect ratio is the best display for gaming, computer, TV. e.t.c.

 For further Study:

https://en.wikipedia.org/wiki/Video

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