Chroma subsampling algorithm

1. How does chroma subsampling work?
2. What is the best chroma subsampling?
3. Does chroma subsampling reduce resolution?
4. What is 4.4 4 chroma?

How does chroma subsampling work?

Chroma subsampling is a type of compression that reduces the color information in a signal in favor of luminance data. This reduces bandwidth without significantly affecting picture quality. A video signal is split into two different aspects: luminance information and color information.

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.

Does chroma subsampling reduce resolution?

Chroma subsampling is the practice of encoding images by implementing less resolution for chroma information than for luma information, taking advantage of the human visual system's lower acuity for color differences than for luminance.

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.