基于FPGA和DSP的音视频采集处理系统设计

The Design of Audio and Video Sampling and Processing System Based on FPGA and DSP

为了实时记录飞机飞行及作业过程中的各种信息,提出了一种基于FPGA和DSP的机载音视频采集处理系统。FPGA作为协处理器,完成对高清视频信号和音频信号的采集、解码以及格式的转换。DSP作为主处理器,在Linux系统的开发环境下,以视频H.264编码算法和音频G.711编码算法为核心完成了对音视频信号的压缩和存储。该系统性能稳定,实用性强,能够满足飞机飞行6小时的5路视频和2路音频信号的采集、存储和回放,达到了设计要求,具有一定的参考价值。

An audio and video sampling and processing system based on FPGA and DSP was proposed to record a variety of information of aircraft flight and operation process in real time. FPGA as a coprocessor completed the collection,decoding and format conversion of high-definition video and audio signals. DSP as a processor completed compression and storage of audio and video signal by video H.264 encoding algorithm and audio G.711 encoding algorithm in the development environment of Linux system. The system is stable and practical ,and can achieve the collection,storage and playback of 5-channel video and 2-channel audio signals. It meets the design requirements and has a certain reference value.