Howtosignalprocessing
- What is 4 4 4 subsampling?
- What do the numbers mean in chroma subsampling?
- What is 4 2 0 subsampling?
- Does chroma sampling affect bandwidth?
What is 4 4 4 subsampling?
With 4:4:4 subsampling, each of the four pixels in the upper row gets unique brightness and color information and each of the four pixels in the lower row gets unique brightness and color information.
What do the numbers mean in chroma subsampling?
Understanding Chroma Subsampling Notation
The notation indicates how the sampling values are applied to a 2 x 4 block of pixels: J indicates the number of luminance samples that will be taken. a describes how many samples are taken in the upper row of pixels. b describes how many samples are taken in the lower row.
What is 4 2 0 subsampling?
The 4:2:2 signal will have half the sampling rate horizontally, but will maintain full sampling vertically. 4:2:0, on the other hand, will only sample colors out of half the pixels on the first row and ignores the second row of the sample completely.
Does chroma sampling affect bandwidth?
Chroma subsampling is a type of compression that reduces the color information in a signal in favor of luminance data in order to reduce bandwidth usage without significantly affecting picture quality.
