8bit and 16bit C1R to C3R

Hello 

I need to convert the following. How can I Do this in IPP ?

1) Convert an image that has 8bit grey scale (1 component)  to 8 bit RGB (3 component) image ?

2) Convert an image that has 16bit grey scale (1 component)  to 8 bit RGB (3 component) image ?

Shashi