关键词: 数码印花, 多核处理器, 图像转置, 内存共享, mailbox技术, 现场可编程门阵列

Abstract: Traditional digital textile printing machine uses PC to complete the image data processing and transmission. Its data bandwidth is narrow and the print speed is slow. To this end, a solution of high-speed digital textile printing system based on multi-core processer is proposed. The system receives the image date by two gigabit fiber ethernet interface. The multi-core processer is applied to complete the decoding of data and the transposition of image. The algorithm of shift transposition is applied to promote the transposition efficiency significantly in place of the algorithm of traversal transposition. The processor achieves the data sharing and synchronization between different cores by sharing memory and applying mailbox technique, as a result, the efficiency of the system is significantly improved. FPGA is applied to achieve the data format conversion and printing output. Test results show that, the system’s total output bandwidth reaches 1.9 Gb/s with 8 sprinkler head, and the printing speed can get to 720 m2/h with 600 dot/inch resolution.

Key words: digital textile printing, multi-core processor, image transposition, memory sharing, mailbox technique, Field Programmable Gate Array（FPGA）