CAJ | 학술논문

采用 ARM Cortex-M4处理器内核的 STM32F407ZGT6芯片为硬件平台。读取 SD 卡内的 AVI 视频文件到主存中，通过 MJPEG 视频解码原理对读入缓存中的数据流不断进行解码，利用 DSP 指令和浮点运算对视频解码算法进行优化处理，提高视频解码效率，能在 LCD 屏上正常播放清晰的视频。在 Cortex-M4上实现 MJPEG的视频解码具有很高的性价比，适用于小区、企业视频监控管理。
채용 ARM Cortex-M4처리기내핵적 STM32F407ZGT6심편위경건평태。독취 SD 잡내적 AVI 시빈문건도주존중，통과 MJPEG 시빈해마원리대독입완존중적수거류불단진행해마，이용 DSP 지령화부점운산대시빈해마산법진행우화처리，제고시빈해마효솔，능재 LCD 병상정상파방청석적시빈。재 Cortex-M4상실현 MJPEG적시빈해마구유흔고적성개비，괄용우소구、기업시빈감공관리。
The hardware platform was achieved based on STM32F407ZGT6 chip with the kernel of ARM Cortex_M4 processor.By reading the AVI format video files in SD into the main memory,using the MJPEG video decoding principle to decrypt data flow which is constantly read into the cache,and the DSP instruction and the function of floating point operations to optimize video decoding algorithm,the study improved the video decoding efficiency.The clear video can be normally played on the LCD screen.The re-alization of MJPEG video decoding in Cortex-M4 presented in this paper is cost-effective,and it is suitable for the video surveillance management of communities and enterprises.