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从结构设计和方法优化入手,提出了基于双SRAM缓存结构并采用乒乓读写原理的CMOS图像传感器逐行转隔行数据缓存方法。该方法采用两组SRAM作为缓存,并利用乒乓读写原理,抽取逐行数据中奇数帧周期的奇数行作为隔行数据的奇数场,抽取逐行数据中偶数帧周期的偶数行作为隔行数据的偶数场,最终实现CMOS图像传感器逐行数据到奇偶隔行数据的转换。相比传统的采用片外帧存储处理方式,极大地减小了存储面积,便于实现与CMOS图像传感器的单芯片集成,降低了成本,同时也极大地降低了电路工作时的存储读写功耗。
Starting from the structural design and method optimization, a cache line-by-line data caching method based on dual SRAM buffer structure and using ping-pong read-write principle is proposed. In the method, two sets of SRAMs are used as buffers, and odd-numbered lines of odd-numbered frame periods in the progressive data are extracted as odd-numbered fields of interlaced data by using a ping-pong read-write principle. Even numbers of even-numbered frame periods in the progressive data are extracted as even numbers of interlaced data Field, the final realization of CMOS image sensor line-by-line data to parity interlaced data conversion. Compared with the traditional use of off-chip frame storage processing, greatly reducing the storage area, easy to achieve and CMOS image sensor single-chip integration, reducing costs, but also greatly reduces the work of the circuit reading and writing power consumption .