Video Formats Flashcards
What signals do RGBHV carry?
RGBHV carries Red, Green and Blue plus Horizontal and Vertical sync signals on separate conductors.
Among analog video signals, RGBHV provides the best video quality.
What signlas do RGBS carry?
RGBS carries Red, Green and Blue signals on separate conductors but combines horizontal and vertical sync signals (sometimes called composite sync) on one conductor.
What signals do RGsB carry?
RGsB carries Red, Green and Blue video signals on separate lines plus the combined (composite) Sync signal is also on the Green signal line. Also called Sync on Green (SOG).
What does RsGsBs carry?
RsGsBs carries the Red, Green and Blue video signals on separate lines. The composite sync signal is also carried on each line.
What is component video?
Component video is a type of a signal that is derived from the Red, Green and Blue analog video signals being converted to the Y, R-Y, B-Y signal format.
The Luminance (Y) signal is created by mixing the Red, Green, and Blue analog video signals in the following proportions to create a grayscale otherwise known as a black and white image.
Y = .30Red + .59Green + .11Blue = 1.00
What is Y/C (S-Video)?
Y/C is the combination of Y-Luminance and C-Chrominance, which makes S-Video.
It is produced by combining the two color difference signals, (R-Y) and (B-Y) in component video, creating another signal called Chrominance (C).
What is Composite Video?
Composite video is the combination of Luminance and Chrominance signals forming a single wire video signal. The combining process is called Encoding. This encoded signal includes the sync elements necessary to rebuild the video image.
What are the three waveforms that comprise a video signal?
Three waveforms comprise a video signal: active video, sync, and color burst.
- Active video controls the brightness of the screen and the shade or tint of a color.
- Sync, or synchronization, causes the picture to be displayed on the screen in the right place at the correct rate.
•Color Burst is used as a timing reference to control the colors hue and saturation displayed on the screen. In color TV systems, a burst of subcarrier frequency is located on the back porch of the composite video signal.
These three signals are combined into one signal to form composite video.
Which video signal is the lowest quality of all the video signals in the hierarchy?
RF signals have the lowest quality of all the video signals in the hierarchy.
