PDF quality problems exporting from InDesign and Photoshop

Hi There.

I'm having big problems exporting my InDesign files to PDFs and retaining the res. And it's not just the images (I understand about the dpi) it's the type on there too.

I have been exporting as the preset High Quality Print - is this wrong. Are there other settings to ensure the PDF I export retains the high-res quality and clarity?

At the moment it comes out high-res when I export it as a jpeg or eps but not PDF.

I have also noticed the same problem when I export to a PDF from Photoshop.

I really need to create interactive and high quality print PDFs from my InDesign files.

Please can you advise.

Thanks

Karen