You are looking to create a 3x3 Video Wall, but before we dive deeper and go straight to the answer, we need to identify how and where do you plan to use this video wall. It also applies which type of LCD screen you already have. 3x3 video wall is just the display, which is half of the story. A different control and flexibility requirement may need different videowall processor and the cost may vary significantly.
PL490 is the video wall solution optimized for the finest image quality and easiest content management.