Read only memory (ROM) structure digital filter system for simplifying design complexity

Abstract

The invention provides a read only memory (ROM) structure digital filter system for simplifying design complexity. The ROM structure digital filter system comprises a filter coefficient supplying module, a compiler and a digital filter, wherein the filter coefficient supplying module is used for receiving input specific parameters of the filter, the specific parameters serving as filter coefficients are supplied for a follow-up module; the compiler is connected with the filter coefficient supplying module and used for translating the filter coefficients into ROM contents needed by the filter automatically through the programmed algorithm in the compiler; and the digital filter is connected with the compiler and used for receiving and storing the ROM contents, and then the design process is finished. The ROM structure digital filter system can translate the filter coefficients input by a designer automatically, simply and rapidly, and errors can not be generated easily. In addition, the ROM contents of a plurality of filters are combined by the expansion algorithm automatically, and therefore simple multiplexing can be achieved. Furthermore, the filter coefficients can be generated again by automatic translation when the filter coefficients are changed or need to be designed again, and the ROM contents do not need to be read and modified.

Description

Technical field [0001] The present invention relates to the technical fields of digital signal processing, compilers and EDA tools. Specifically, the present invention relates to a ROM structure digital filter system that simplifies design complexity. Background technique [0002] figure 1 It is a schematic diagram of the internal structure of a ROM structure digital filter in the prior art. Such as figure 1 As shown, the ROM structure digital filter 100 is mainly composed of an address generator (DAG), a ROM (read only memory) for storing instructions, a RAM (random access memory) for storing cache, and an arithmetic logic unit (ALU) composition. The arithmetic logic unit includes components such as shift register (SHIFT), inverter (INV), selector and accumulator (ACC). [0003] figure 2 It is a schematic diagram of the working principle of a ROM structure digital filter in the prior art. Such as figure 2 As shown, its working principle can be simply described as a miniature ...

AI Technical Summary

Problems solved by technology

[0012] 1) There is no uniform standard from hardware computing structure to instruction definition, and the entire R&D process includes ROM content and computing architecture design, and the design time is too long;

[0013] 2) During the research and development process, the digital filter coefficients need to be translated into ROM content (instruction flow), the translation complexity is high, and the translation process is error-prone;

[0014] 3) During the research and development process, in order to achieve the filter multiplexing effect, it is more difficult to write the ROM content;

[0015] 4) Instructions are poorly readable and difficult to modify

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