关键词: 数码印花, 图像数据转置, 实时, 喷印速度, 现场可编程门阵列（FPGA）

Abstract: In general, the output bandwidth and printing speed of digital inkjet printer are limited as PC isn’t capable of transposing large quantities of image data bit-by-bit in real-time. A new high-speed data processing system based on PowerPC processor and Virtex-5 series FPGA is proposed, and a high-efficiency transposition method is achieved by using FPGA. Three independent DDR2 controllers are instantiated inside FPGA and system output bandwidth is improved by the collaborative work among these controllers; bit-by-bit transposition unit is designed, image data is divided into small blocks and these blocks are efficiently read or written through burst transmission of DDR2 controllers. Performance testing results demonstrate that output bandwidth of FPGA is up to 327 Mb/s and printing speed of digital inkjet printer reaches 249 m2/h, which is much faster than PC processing system under the same conditions.

Key words: digital printing, image data transposition, real-time, printing speed, Field-Programmable Gate Array（FPGA）