Core Video access to a Digital TV signal

[Christopher Hunt]

Hi there,

We wish to receive a free to air Digital Terrestrial Television  
signal via coaxial cable, select a channel and be able to access a  
memory buffer of frames.

Does anyone know of a hardware product that can do this? Ideally it'd  
be a internal PCI Express card. I'm wanting this solution for a  
current model Mac Pro.

Once we have a buffer we would then look to present the buffer to  
Core Video for rendering.

Thanks for your advice.

Kind regards,
Christopher