The Implementation Of MPEG Audio Coding Algorithm And The Design Of VLSI Front End

In the field of satellite digital television broadcast, our country employs the MPEG-1 layers II dual channel stereo coding algorithm. However, the large amount of data operation is required in this kind of algorithm and it cannot be implemented without the Application Specific Integrated Circuit. In the paper, the algorithm procedure is optimized and verified with software, and a hardware-base system is searched.This thesis consists of the following contents:First, the differences of the MPEG coding and some generally audio coding algorithms are compared, and the MPEG coding plays better than others in rate and quality. The MPEG audio coding international standard is analyzed in detail, and the model of the MPEG audio coding and decoding system set up with the MATLAB mathematics tools. At last, the encoding hardware structure of MPEG-1 layer II is put forward.Second, in the paper, we have analyzed every module of the structure and estimated it's complexity. Then the sub-band filter bank and psycho- acoustic modules are more investigated. A more efficient algorithm based on Fast Fourier Transform is introduced, and we join together the character of the hardware to improve it's hardware construction. Furthermore the validity of algorithm has been verified using the Matlab tool. Programs with Verilog language, which describe all modules of the hardware construction, have been given and succeed in the logic simulation and synthesis.Finally, on the basis of the MPEG-1 layer Hencoding hardware structure, the block of logic communicates with the PC over the parallel port and the interface for Flash memory are design. Then a MPEG audio coding system, which applies to store audio signal, is presented through the field programmable gate array device technology. The Verilog HDL models of the coder are programmed, and verified.