Poor quality images in the presenter panel

Hello all,

Forgive me if this question has been asked before.

Is there any way that I can improve the quality of the image that appears in the presenter panel?

I create 233 x 175 pixels images, convert them using the Articulate Video Encoder, to a Medium size, then import as Flash into presenter in order to show in the presenter panel. However, it doesn't matter what options I seem to choose in the Encoder, whenever I publish the course the image looks bitty, and of a really poor quality. It hasn't been too much of an issue in the past, more of an annoyance, but I've just been asked to improve the quality by a new client, and of course don't want to disappoint.

Any recommendations on sizes, options to choose etc., in order to get a better quality image displayed?

Many thanks indeed,

Barry