In order to increase the hardware utilization and minimize the chip area a multi-transform coding architecture which includes 4 ×4 forward integer transform 4 ×4 inverse integer transform 4 ×4 Hadamard ...In order to increase the hardware utilization and minimize the chip area a multi-transform coding architecture which includes 4 ×4 forward integer transform 4 ×4 inverse integer transform 4 ×4 Hadamard transform and 2 ×2 Hadamard transform is proposed. By simplifying these transforms and exploring their similarities the proposed design merges the architectures processing individual transforms into a high-performance multi-transform coding architecture.Using a semiconductor manufacturing international corporation SMIC 0.18 μm complementary metal oxide semiconductor CMOS technology the proposed architecture achieves the maximum operating clock frequency of 200 MHz and the throughput rate of 800 ×106 pixel/s with the hardware cost of 3 704 gates.The results demonstrate that the data throughput rate per unit area DTUA of this design is at least 40.28%higher than that of the reference design.This design can meet the requirements of real-time decoding digital cinema video 4 096 ×2 048@30 Hz at 62.9 MHz which helps to reduce the power consumption.展开更多
Acousto-optic system for performing basic operations of vector-matrix multiplication with digital(16-bit)accuracy are described.The system comprised of two multi-transducer Bragg cells that can perform at least 1×...Acousto-optic system for performing basic operations of vector-matrix multiplication with digital(16-bit)accuracy are described.The system comprised of two multi-transducer Bragg cells that can perform at least 1×10 8 operation/s of basic vector-matrix multiplication with digital (16-bit ) accuracy and which is simple and compact.展开更多
在多变换器电力电子系统中,负载变换器可以等效为前级变换器的恒定功率负载CPL(constant power load),这给系统带来了等效负电阻,导致系统不稳定,而采用主动阻尼的方法能够解决这个问题,并且不产生额外功耗,故根据主动阻尼方法改进了Buc...在多变换器电力电子系统中,负载变换器可以等效为前级变换器的恒定功率负载CPL(constant power load),这给系统带来了等效负电阻,导致系统不稳定,而采用主动阻尼的方法能够解决这个问题,并且不产生额外功耗,故根据主动阻尼方法改进了Buck DC/DC开关变换器。展开更多
传统级联型多电平变换器用于高压大容量电机变频调速系统的最大问题在于,需要采用体积庞大的多绕组工频变压器为各功率单元提供独立的直流供电电源。为解决这一不足,提出一种无需工频变压器耦合的新型四象限混合型模块组合多电平变换器(...传统级联型多电平变换器用于高压大容量电机变频调速系统的最大问题在于,需要采用体积庞大的多绕组工频变压器为各功率单元提供独立的直流供电电源。为解决这一不足,提出一种无需工频变压器耦合的新型四象限混合型模块组合多电平变换器(hybrid modular multilevel converter,HMMC)。HMMC由三桥臂功率单元(three-leg power unit,TPU)、半桥功率单元(half-bridge power unit,HPU)和桥臂电感级联而成,具有高度模块化、易于扩展、输出电压波形好等特点。深入分析HMMC的拓扑结构、工作原理及相应的控制策略,并设计一台三电平HMMC试验样机,实验结果验证了提出的理论分析和控制策略的有效性和正确性。展开更多
基金The National Key Technology R&D Program of China during the 12th Five Year Plan Period(No.2013BAJ05B03)
文摘In order to increase the hardware utilization and minimize the chip area a multi-transform coding architecture which includes 4 ×4 forward integer transform 4 ×4 inverse integer transform 4 ×4 Hadamard transform and 2 ×2 Hadamard transform is proposed. By simplifying these transforms and exploring their similarities the proposed design merges the architectures processing individual transforms into a high-performance multi-transform coding architecture.Using a semiconductor manufacturing international corporation SMIC 0.18 μm complementary metal oxide semiconductor CMOS technology the proposed architecture achieves the maximum operating clock frequency of 200 MHz and the throughput rate of 800 ×106 pixel/s with the hardware cost of 3 704 gates.The results demonstrate that the data throughput rate per unit area DTUA of this design is at least 40.28%higher than that of the reference design.This design can meet the requirements of real-time decoding digital cinema video 4 096 ×2 048@30 Hz at 62.9 MHz which helps to reduce the power consumption.
文摘Acousto-optic system for performing basic operations of vector-matrix multiplication with digital(16-bit)accuracy are described.The system comprised of two multi-transducer Bragg cells that can perform at least 1×10 8 operation/s of basic vector-matrix multiplication with digital (16-bit ) accuracy and which is simple and compact.
文摘传统级联型多电平变换器用于高压大容量电机变频调速系统的最大问题在于,需要采用体积庞大的多绕组工频变压器为各功率单元提供独立的直流供电电源。为解决这一不足,提出一种无需工频变压器耦合的新型四象限混合型模块组合多电平变换器(hybrid modular multilevel converter,HMMC)。HMMC由三桥臂功率单元(three-leg power unit,TPU)、半桥功率单元(half-bridge power unit,HPU)和桥臂电感级联而成,具有高度模块化、易于扩展、输出电压波形好等特点。深入分析HMMC的拓扑结构、工作原理及相应的控制策略,并设计一台三电平HMMC试验样机,实验结果验证了提出的理论分析和控制策略的有效性和正确性。
