Multi-channel Audio Systems Design And Implementation Based On FPGA

At present stereo recording and playback format is being replaced by surround sound format. Many art and technology was developed in the application in a variety of surround sound technology, providing space feeling for the hearing through the appropriate recording and playback mode. In the study, there are two main ways, one is Perception Model, the other is a Sound field Simulation. Common multi-channel sound systems are also technology design based on the Perception Model. It is very rare based on the sound field simulation of the system, because technically and physically not only concept is very complicated, but also it needed to be in the background of deep acoustic and signal process. The design is of the N-channel sound system based on Sound Field Simulation. N-channel, this is due to sound field simulation technology is also used loudspeakers Array Technology based on the sound system. In this system, the number of loudspeakers is between 10 and several hundred, the number of speakers based on the sound field simulation of the system is far more than based on the perception of multi-channel system design, and the difference in the use of "N-channel" is reflected in magnitude. The design of the loudspeaker array technology can better solve the best listening area narrow, it has a very practical value of this system in the major theatres, concert halls, stadiums; plaza recording broadcast system and it will have Very broad market prospects. In this paper, the content of the theory is mainly to provide a platform to achieve the structure.The paper realized a number of audio collection, data frame structure package, multi-channel audio TDM on the existing hardware platform, and completed a preliminary test to platform. There is a detailed description for the entire system of data transmission format and content.the research results of the design includes: the entire system of data transmission, packaging, access, TDM with detailed architecture, through TDM, and a multi-channel audio transmission, initially completed through the time-stamp information on more than Road synchronized audio signal processing.