DTV Set-Top Boxes have limited memory and processing capacity. Performance of your site will be improved if you minimise the amount of processing the DTV Transcoding servers and the STB have to do. This will also prevent memory errors and reduce the likelihood of the STB crashing.

You should optimise the performance of your site as follows:

Minimise Processing

• Build layouts, tables and frames to fit within the 640x400 TV Internet safe area
• Keep table structures simple, avoid complex table nesting arrangements
• Use server-side processing in preference to JavaScript and other client-side memory/processing intensive coding where possible.
• Optimise all JavaScript (see How to: minimise code usage)

Use Images Effectively

• Do not use full screen background images
• Make each image as small (in pixel dimension) as possible
• DO NOT use empty gifs or blank spacer gifs. Use the special Netscape tag instead
• Use image size tags (height & width) for ALL images