Image Transition

I have an iframe that has a javascript that redirects back to itself every 300 milliseconds by the following script:

<script language="JavaScript">
<!--
setTimeout('Redirect()',300);
function Redirect() {
location.href = 'get_image.php'
}
// -->
</script>

This iframe then displays stored jpeg images one after another to simulate an mpeg with the following code:

echo "<td align='center' height=ò~' valign='middle' width=¸ß'><img src='images/$filename'></td>";

My problem is that the "video" is very choppy due to the constant redirection. Does any one know a way to transition images to have my "video" display more smoothely?