关键词：码速变换电路，可靠性，汉明编码，奇偶校验，VHDL语言
ABSTRACT
Modern Communication, as instrument of information transfer and information interchange,has become lifeline of social development and economic activity.It lick the limit of time and spare,which makes it possible to chansmit high-capacity and Sunday run information.
The major problem of digital signal such as digital communication,digital transfer, image transmission and so on is reliability in interchange and chansmition we run into.And (7,4)hamming code electrocircuit has become useful. In the process of Error Correction of Coding,One of sticking point is to alternate information code’s transmission speed. Therefore, it is integrant to use a simple and reliable Code speed transform circuit.
I am responsible for the issue of the serial inputing (7,4) Hamming code circuit, parity bit circuit module. Design environment is the use of ALTERA company’s Max + PlusⅡ10.2, it can give full play of the schematic diagram and the advantages of hardware description language. The entire coding circuit uses module structures and VHDL language to realize.
