User Manual

AV.io SDI User Guide Resolutions, capture rates and aspect ratios

Resolutions, capture rates and aspect ratios

The resolution (also known as frame size or display mode) of a video signal, digital image, TV screen,

computer monitor or other display device is a count of the number of pixels displayed horizontally and

vertically. For example the resolution 1920×1080 (which is 1080p) creates an image that is 1920 pixels wide

and 1080 pixels tall.

AV.io SDI generates a list of the following possible resolutions for your capture application to select for output

display:

640×360 960×540 1920×1080

640×480 1280×720

Captured video content is output to your application at 15, 30 or 60 frames per second (your application

chooses one of these frame rates) when captured over USB 3.0.

The aspect ratio of an image describes the proportional relationship between its pixel width and height. The

resolution 1920×1080 (1080p) is quite a bit wider than it is tall. The ratio of its width to height is 16 to 9,

represented as an aspect ratio 16:9.

AV.io SDI outputs resolutions in commonly supported aspects ratios, color-coded according to table of

resolutions above and described in the table below:

Aspect Ratio Common Use

4:3

Standard letterbox TV display and non-widescreen computer displays, SD-SDI resolution

16:9

Widescreen (HD) TV displays (1080p, 1080i, 720p etc)