Four-Channel 1080p Stitching to 4K Output: A Bandwidth Ledger
Stitching four 1080p camera feeds into one 4K output looks like "just putting four pictures together," but behind it lies a bandwidth ledger: input bandwidth, DDR frame-buffer bandwidth, scaling engine bandwidth, and output bandwidth — four layers stacked on top of each other. Get the math wrong and you get stuttering, tearing, or DDR overload. This article walks through every layer from pixel clock upward.