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为了满足高帧频、大面阵CCD数字视频实时存储要求,在分析数字视频的信号特点和SCSI系统数据传输过程的基础上,建立了缓冲并行预处理和SCSI直接存储阵列数据传输的理论模型。从理论和实验两个方面分析了SC SI总线速度和SCSI硬盘持续存储速率两个决定存储速率的主要因素,并且分析了数据分块大小,LBA(逻辑块地址)范围以及系统调度策略对SCSI硬盘阵列数据存储速度的影响。实验表明,通过选择合适的应用背景来减少总线冲突,可以满足100MB/s视频数据的存储要求。
In order to meet the requirement of high frame rate and large area CCD digital video real-time storage, a theoretical model of buffering parallel preprocessing and SCSI direct memory array data transmission is established based on analyzing the characteristics of digital video signal and the data transmission of SCSI system. The main factors that determine the storage rate of SCI bus speed and sustained storage rate of SCSI hard disk are analyzed from two aspects of theory and experiment. The data block size, LBA (logical block address) range and system scheduling strategy are analyzed for SCSI hard disk The impact of array data storage speed. Experiments show that by selecting the appropriate application background to reduce bus conflicts, to meet the 100MB / s video data storage requirements.