YUV420 to RGB

HI All,
I am working on Symbian Series 60 3rd Edition platform.
I need to convert YUV 420 Planer image frame to RGB format i have used couple of formulas given on wikipedia and this link http://www.fourcc.org/fccyvrgb.php to convert… but i am continously getting some color noise… can any one explain me how to do conversion.

according to this link http://msdn.microsoft.com/en-us/library/ms893078.aspx i need to convert YUV420 to YUV444. I have searched for many YUV420 to YUV444 convesrion formulas or code but could not found a working code.

If anybody has any info please share with me.

Thanks in advance

Images what i am geeting are attached with this mail

And the connection to OpenGL is … ?

I was thinking that No matter which platform i work conversion technique between YU420 to RGB is same …