How to set priority of encoding?

The ROI is set on higher priority,since it has more important information for diagnostic purposes;and the BG is set on lower priority,since it has less important information (such as patient information and the ultrasound image parameters inform of texts How to set ROI as higher priority.

[Walter Roberson]

What kind of encoding?

[Sivakumaran Chandrasekaran]

Thanks walter.. there is a modification in my code...Forgot the concept of encoding... How to set priority in matlab generally