DDR – Duyuan Electronics

Application Practice

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.

2026-10-12·Read more →

Solution Analysis

PCIe Bandwidth Planning: How Much Net Bandwidth Can You Really Get from Gen3 x4 to x16?

The PCIe bandwidth bill is far more complex than the number on the datasheet—raw bandwidth, coding overhead, protocol overhead, DMA efficiency, and the DDR bottleneck each eat into that "16 GB/s". This article works through Gen3 x4/x8/x16, all the way to DDR and DMA matching, and gives a reusable method for estimating net bandwidth.

2026-10-09·Read more →