A HIGH-PERFORMANCE VLSI ARCHITECTURE OF EBCOT BLOCK CODING IN JPEG2000

The paper presents a new architecture composed of bit plane-parallel coder for Embedded Block Coding with Optimized Truncation (EBCOT) entropy encoder used in JPEG2000. In the architecture, the coding information of each bit plane can be obtained simultaneously and processed parallel. Compared with other architectures, it has advantages of high parallelism, and no waste clock cycles for a single point. The experimental results show that it reduces the processing time about 86% than that of bit plane sequential scheme. A Field Programmable Gate Array (FPGA) prototype chip is designed and simulation results show that it can process 512×512 gray-scaled images with more than 30 frames per second at 52MHz.

区块链技术、网络嵌入性与供应链金融绩效——模糊集定性比较分析

为探索区块链技术对供应链金融的影响机制,从网络嵌入性视角出发,收集了279份数据样本。建立“数字信用共治—网络嵌入性—供应链金融绩效”的基本理论模型,运用偏最小二乘法验证结构方程模型,并进一步用模糊集定性比较分析分别以融资周期、融资额度、融资可获得性及融资成本4个融资绩效维度作为结果变量进行组态分析,得到6个融资绩效影响因素等效构型。研究结果表明:区块链技术无法通过提高企业中心度降低融资成本;不能通过提高企业关系持久度提高企业融资额度,也不能通过提高企业间合作频率缩短企业融资周期。除此之外,从网络嵌入性角度将各融资绩效维度提升机制归纳为:市场环境引导机制、核心优势主导机制、企业交流引领机制、内外兼修维持机制。最后根据各融资绩效维度影响机制,从网络嵌入性的角度打开区块链技术提升供应链金融绩效的“黑箱”,并为中小企业提高融资绩效提供可实施建议。