I observe in several websites and movies esp in youtube the measurement in video quality but im very curious about what does p stands for? like videos with (240p, 480p, 360p, 720p)
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It stands for progressive. i stands for interlaced. Progressive scans the entire frame ever time it is refreshed. Interlaced refreshes every other line alternatively. -
Adding to Rabbit's post:
That's why you see lines on new screens when you view Interlaced video; whereas when you view progressive videos you don't see them.
The idea behind the Interlaced video is to reduce the bandwidth required to send the information: every other line of the image is visible from frame to frame. It was used a lot for TV broadcasting for many many years. As technology became better, and our means to transmit data became better, we are now able to transmit progressive video (were every frame has all lines of data).
If you're looking to save on bandwidth while broadcasting video over the internet, you may consider using interlace over progressive...b ut if you're looking for a better quality in picture you may choose progressive over interlace. You will either have to sacrifice bandwidth or picture quality.Comment
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