[Mp4-tech]Color Space

[tech list]

Pankaj, MSDN has a good tutorial on this. Do take a look, it should help you
out.
On 12/23/05, karthik b <karthikmct gmail.com> wrote:
>
> 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>
> Content-Type: text/plain; charset="iso-8859-1"
>
> 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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