How can I add "DTS","Neo6","Dolby" three software modules into ADSP21369 all together?

Hi everybody,
    I am now doing the project which will need to use "DTS 5.1 Decoder","Neo6","Dolby 5.1 Deoder" three software modules. Now Using ADSP21369(2M bit RAM,333MHz) with SDRAM(128M bit,166MHz). 
    I have added DTS and Neo6 modules into my project correctly, but no enough onchip memory to add Dolby module.I have placed some slow datas and initialization codes into SDRAM(code using overlay),but these modules require onchip memory mostly.
   how shall I do? Or how shall I use SDRAM best?Or how can I add "DTS","Neo6","Dolby" three software modules into ADSP21369 all together?

   Thirst for your helps very much!
   Best regards,
Alan