[Mp4-tech]Color Space

[karthik b]

Hello  Pankaj,
Actually,by 4:2:2 color component we mean that the chroma component of the
input is Sub-sampled.
It is chroma subsampling.In order to compress bandwidth, Cb and Cr are
sampled at a lower rate than Y.
YCbCr is designated as 4:n:n. The 4 represents a sampling rate of 13.5MHz,
which is the standard frequency (ITU-R BT.601) for digitizing analog NTSC,
PAL and SECAM. The next two digits represent the Cb and CR rate.
Cb and Cr are sampled at half the horizontal resolution of Y. Cb/Cr samples
are taken at the same time as Y. 4:2:2 color sampling is widely used and
considered as very high quality.
Hope this will help you.
Regards,
Karthik.B
Date: Thu, 22 Dec 2023 07:34:30 +0100
From: "pankaj bajpai" <pankaj_bajpai_iet operamail.com>
Subject: [Mp4-tech]Color Space
To: mp4-tech lists.mpegif.org
Message-ID: <20051222063430.CC89BCA0A3 ws5-11.us4.outblaze.com>
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Hi All!
I am not able to exactly figure out the realtion between the sampling of
color component when we talk about 4:2:2 or so?
I mean what exactly the three ratio quantity signifies?
With regards
pankaj
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