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一．FPGA：现场可编程门阵列

ASSP: 专用标准器件

VHDL: 极高速集成电路硬件描述语言

ADSL: 非对称数字用户环线

DMM: 数字万用表

AFG: 任意函数发生器

RTOS: 实时操作系统

WLAN: 无线局域网

MPEG: 运动图象专家组

DCT: 离散余弦变换

二.定制类：Custom Cla

采样保持电路：Sample and hold circuit

知识产权：Intellectual Property

集成开发工具：Integrated development tool

机顶盒：STB(Set Top Box)

功率耗散：Power diipation

半导体制造商：Foundry

直接序列扩频: Direct sequence spread spectrum

量化步长：Quantifying step size

向下（后）兼容：Backward compatible

二．1.An operating system vendor that takes the real-time behavior product seriously will usually

publish a datasheet providing the minim average and maximum number of clock cycles required by each system.如果操作系统提供商能够认真看待其产品的实时性能的话，那么它一般会通过数据手册公布每个系统调用所需时钟周期数的最小值，平均值和最大值。

三．1.因为其灵活性，FPGA广泛用于ASIC仿真、互联逻辑集成，或者用作那些功能繁多、标准不断变化的应用的解决方案。

Known for their flexibility, FPGAs were widely used for ASIC emulation, glue-logic consolidation, or as a solution for applications with volatility and changing standards.2.片上系统是数字化应用及微电子技术迅速发展的产物，是下一代基于数字信号处理产品的主要发展方向之一。它把一种应用系统集成在一个芯片上。通常，为满足系统的性能要求和提高功率效率，会把数字信号处理器和微控制单元的多处理器处理平台集成在一起。SOC(System on Chip)is the product of digital application and the rapid development of microelectronics technology, and it is one of the main development directions of next-generation DSP-based products.It integrates an application system on a single chip.In general, in order to meet the system performance requirements and improve power efficiency, DSP and MCU will be integrated to multi-proceor platforms.3.“专用集成电路”不是微处理器这样的通用芯片，而是一种为特殊用途设计的定制芯片。和通用CPU相比，使用专用集成电路可以提高性能。因为专用集成电路是使用硬连线完胜距离工作的，并不需要为取指令和解释指令付出开销。

An ASIC(Application Specific Integrated Circuit)is a chip that is custom designed for a specific application rather than a general-purpose chip such as a microproceor.The use of ASICs improves performance over general-purpose CPUs.Because ASIC are “hardwired” to do a specific job and do not incur the overhead of fetching and interpreting stored instructions.