4 4 2 YCbCr to RGB conversion

Hi. I am trying to create a vhdl code for sending image from pal camera to vga screen. I use decoder which converts pal video output to 4 4 2 ycbcr format. I want to convert data from ycbcr to rgb format inside fpga. There are formulas on internet but I dont fully understand the logic. For example I got 1440 byte data coming per line which means 11,520 bit. Rgb requires 12 bit per pixel and my monitor have 1280 pixel in one line. So I need 15,360 bit. How do I arrange these numbers? And do I...

4 4 2 YCbCr to RGB conversion