In order to improve the data throughput of the advanced encryption standard (AES) IP core while reducing the hardware resource consumption and finally achieving a tradeoff between speed and area, a mixed pipeline ar...In order to improve the data throughput of the advanced encryption standard (AES) IP core while reducing the hardware resource consumption and finally achieving a tradeoff between speed and area, a mixed pipeline architecture and reconfigurable technology for the design and implementation of the AES IP core is proposed. The encryption and decryption processes of the AES algorithm are achieved in the same process within the mixed pipeline structure. According to the finite field characterizations, the Sbox in the AES algorithm is optimized. ShiftRow and MixColumn, which are the main components in AES round transformation, are optimized with the reconfigurable technology. The design is implemented on the Xilinx Virtex2p xc2vp20-7 field programmable gate array (FPGA) device. It can achieve a data throughput above 2.58 Gbit/s, and it only requires 3 233 slices. Compared with other related designs of AES IP cores on the same device, the proposed design can achieve a tradeoff between speed and area, and obtain satisfactory results in both data throughput and hardware resource consumption.展开更多
Some factors influencing the intelligibility of the enhanced whisper in the joint time-frequency domain are evaluated. Specifically, both the spectrum density and different regions of the enhanced spectrum are analyze...Some factors influencing the intelligibility of the enhanced whisper in the joint time-frequency domain are evaluated. Specifically, both the spectrum density and different regions of the enhanced spectrum are analyzed. Experimental results show that for a spectrum of some density, the joint time-frequency gain-modification based speech enhancement algorithm achieves significant improvement in intelligibility. Additionally, the spectrum region where the estimated spectrum is smaller than the clean spectrum, is the most important region contributing to intelligibility improvement for the enhanced whisper. The spectrum region where the estimated spectrum is larger than twice the size of the clean spectrum is detrimental to speech intelligibility perception within the whisper context.展开更多
2002年9月12日,微软公司在北京举行了Windows XP Tablet PC版(简体中文、繁体中文、韩文和日文版)预览会,并首次提出了Tablet PC这一未来便携式电脑的全新概念。在之后的2个月中,一批在业界具有举足轻重地位的厂商,陆续推出了各自的Tabl...2002年9月12日,微软公司在北京举行了Windows XP Tablet PC版(简体中文、繁体中文、韩文和日文版)预览会,并首次提出了Tablet PC这一未来便携式电脑的全新概念。在之后的2个月中,一批在业界具有举足轻重地位的厂商,陆续推出了各自的Tablet PC产品。2002年11月21日,中国惠普有限公司在京举办了题为“唤醒真正的‘笔记’本应用”--惠普CompaqTablet PC TC1000亮相中国的新闻发布会,正式推出了一种功能齐全的。展开更多
文摘In order to improve the data throughput of the advanced encryption standard (AES) IP core while reducing the hardware resource consumption and finally achieving a tradeoff between speed and area, a mixed pipeline architecture and reconfigurable technology for the design and implementation of the AES IP core is proposed. The encryption and decryption processes of the AES algorithm are achieved in the same process within the mixed pipeline structure. According to the finite field characterizations, the Sbox in the AES algorithm is optimized. ShiftRow and MixColumn, which are the main components in AES round transformation, are optimized with the reconfigurable technology. The design is implemented on the Xilinx Virtex2p xc2vp20-7 field programmable gate array (FPGA) device. It can achieve a data throughput above 2.58 Gbit/s, and it only requires 3 233 slices. Compared with other related designs of AES IP cores on the same device, the proposed design can achieve a tradeoff between speed and area, and obtain satisfactory results in both data throughput and hardware resource consumption.
基金The National Natural Science Foundation of China(No.61301295,61273266,61301219,61201326,61003131)the Natural Science Foundation of Anhui Province(No.1308085QF100,1408085MF113)+2 种基金the Natural Science Foundation of Jiangsu Province(No.BK20130241)the Natural Science Foundation of Higher Education Institutions of Jiangsu Province(No.12KJB510021)the Doctoral Fund of Anhui University
文摘Some factors influencing the intelligibility of the enhanced whisper in the joint time-frequency domain are evaluated. Specifically, both the spectrum density and different regions of the enhanced spectrum are analyzed. Experimental results show that for a spectrum of some density, the joint time-frequency gain-modification based speech enhancement algorithm achieves significant improvement in intelligibility. Additionally, the spectrum region where the estimated spectrum is smaller than the clean spectrum, is the most important region contributing to intelligibility improvement for the enhanced whisper. The spectrum region where the estimated spectrum is larger than twice the size of the clean spectrum is detrimental to speech intelligibility perception within the whisper context.
文摘2002年9月12日,微软公司在北京举行了Windows XP Tablet PC版(简体中文、繁体中文、韩文和日文版)预览会,并首次提出了Tablet PC这一未来便携式电脑的全新概念。在之后的2个月中,一批在业界具有举足轻重地位的厂商,陆续推出了各自的Tablet PC产品。2002年11月21日,中国惠普有限公司在京举办了题为“唤醒真正的‘笔记’本应用”--惠普CompaqTablet PC TC1000亮相中国的新闻发布会,正式推出了一种功能齐全的。