Howtosignalprocessing
- What is 4 2 0 subsampling?
- Is chroma subsampling good?
- What is 4.4 4 chroma?
- What is the best chroma subsampling?
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.
Is chroma subsampling good?
Color information, chrominance or simply chroma is important as well but has less visual impact. What chroma subsampling does is reduce the amount of color information in the signal to allow more luminance data instead. This allows you to maintain picture clarity while effectively reducing the file size up to 50%.
What is 4.4 4 chroma?
A signal with chroma 4:4:4 has no compression (so it is not subsampled) and transports both luminance and color data entirely. In a four by two array of pixels, 4:2:2 has half the chroma of 4:4:4, and 4:2:0 has a quarter of the color information available.
What is the best chroma subsampling?
Answer: 4:4:4 is uncompressed and therefore provides the best image quality, whereas 4:2:2 and 4:2:0 sacrifice color quality for a lower data rate. Chroma subsampling is a type of color compression that reduces data rate and file size.
