Liu Yinbi Lu refined Wang Liang
abstract: This article has carried on the summary and the analysis to the digital signal processor, has involved the digital signal processor's development, and unifies its software and hardware characteristic, discussed the digital signal processor's superiority, proposed the digital signal processor present stage faces question and challenge.
key word: DSP digital signal processing system software and hardware characteristic
one DSP development process
the informationization's foundation is the digitization. One of digitized core technologies is the digital signal processing. Digital signal processing's duty needs to complete to a great extent by the DSP component. The DSP technology has become the people to pay attention to and to obtain the rapidly expand frontier technology day by day. DSP may represent the digital signal processor (Digital Signal Processor), may also represent the digital signal processing technology (Digital Signal Processing), the latter is the technology theoretically, must turn the actual product through the former. Both unify become solve some actual problem and realize some plan method are the digital signal processing solution (DSPS). This article stresses to the DSP first kind of explanation - digital signal processor carries on the elaboration. DSP will be transforms the digital signal in the simulated signal later to carry on the high speed real-time processing the special-purpose processor, its processing speed compared to quickest CPU also quick 10~50 times. Under the now digitized time background, DSP oneself becomes domain and so on correspondence, computer, expense class electronic products foundation components. The professional predicted that DSP will be in the future integrated circuit develops the quickest electronic products, and becomes the electronic products renewal the determining factor. before DSP appears the digital signal processing can only depend upon MPU (microprocessor) to complete. But the MPU low processing speed is unable to satisfy the high speed real-time request.
Therefore, some people advanced the DSP theory and the algorithm foundation in the 70s. But DSP pauses merely in the textbook, even if is the DSP system which develops is also is composed of the discrete module, its application domain only limits to the military, the aviation navigation big department.
along with the large scale integrated circuit technology's development, in 1982 in the world was born the first DSP chip. This kind of DSP component uses the micron craft NMOS technology manufacture, although the power loss and the size are slightly big, but the operating speed has been actually quicker than MPU several dozens times, especially obtained the widespread application in the speech synthesis and the code decoder. The DSP chip is published symbolizes that the DSP application system made great strides forward a stride by the large-scale system to the miniaturization. Along with the CMOS technology's progress and the development, the second generation chip arises at the historic moment based on CMOS the craft DSP, its storage capacity and the operating speed enhance doubled and re-doubled, become pronunciation processing, the image hardware processing technology foundation. In the late 80s, the third generation DSP chip is published, the operating speed further enhances, it applies in the scope gradual growth to the correspondence, the computer domain.
the DSP development is quickest in the 90s, presented fourth generation and the fifth generation of DSP component one after another. Present's DSP belongs to the fifth generation of product, it compares with the fourth generation, the system integration rate is higher, DSP core nucleus and periphery module metasynthesis on sole chip. This kind of integration rate extremely high DSP chip not only in the correspondence, the computer domain gives full play, moreover seeps gradually to the people expends the domain daily, the prospect is very considerable.
the two, DSP characteristics and superiority
1. hardware characteristic
(1) DSP is belongs to Modified the Harvard construction, namely it has two internal main lines: Data bus, program bus. The procedure and the data storage space separates, has the independence address bus and the data bus respectively, takes refers to with the reading may also carry on, at present has amounted to 9,000,000,000 floating point calculation/second (9000MFLOPS).
(2) uses the streamlined production. Each instruction's execution divides to take the instruction, the decoding, the fetching, the execution and so on certain steps, completes separately by the internal many function unit. Quite Yu Duotiao instruction concurrent execution, thus raised the operating speed greatly.
数字信号处理是一个高度发展的领域,是属于最先进的电子系统.应用于例如移动通信系统, mp3/cd/dvd-players和医疗领域里关于心脏起搏器的应用,助听器的应用及各种实例算法不同类型的滤波器, 编码和图像识别.DSP往往针对于一个有实时性要求的系统,这就为某些数字信号处理构筑了一个“单片机”. DSP标准处理器的发展到涵盖了广泛的应用,因此,在在许多系统和要求有高度的灵活性的处理能力的器件上应用广泛.但是,对DSP芯片有很多特定规范,例如吞吐量和功耗的需求,这需要特定应用的体系结构. 标准信号处理器及其与其他解决方案讨论的内容是: 1 . 表征和代表性的信号处理算法:信号流,数据流和依赖图的概念和迭代方向. 2 . 建筑转化的概念,时序,流水线和并行处理的高吞吐量和/或低功耗. 不同类型的结构,如时间复用和硬件映射和如何变换,可他们之间使用 观念的展开和折叠. 3 . 变换算法如何复杂算法可以降低,从而达到更有效地实施,通过概念 强度折减. 4 . 不同的编码体系,他们如何使用,如何影响执行绩效.
Along with the computer and information science, the rapid development of Digital Signal Processing DSP (Digital Signal Processing, the abbreviation DSP) gradually developed into an independent subject, and become an important part of information science, in speech treatment, radar, image Processing, communication, biomedical engineering, etc widely applied.
This design in produce synthetic signal after use IIR low-pass filter filter out the high frequency signal spectrum analysis method to use components, check filtering effect. The MATLAB simulation, the filter parameters in the use of DSP realize lowpass filter, and frequency domain analysis of CCS function view filtering effect. This article will TMS320VC55x combined with the characteristic of structure, in the TMS320VC55x IIR filter introduced a method. Observe the simulation results show that the precision filter, high stability, easy to port to use, with strong practicability and flexibility. In addition the paper also introduces the MATLAB and development environment, and how to CCS MATLAB aided design DSP system. The program has been through simulation software to verify, the design IIR filter comply with the design requirements.
兄弟啊，本人要是语法错误了，指出来吧……我也不是很确定的说
