通过对星上影像数据有损压缩技术的现状分析,针对框幅式和推帚式影像数据采集方式,提出一种基于A436TM的星上数据压缩硬件方案。同专用编码器系统相比较,该系统具有压缩比可调,压缩算法改变灵活等特点,同时采用数据并行处理技术和抗误码扩散技术,在提高数据处理能力的同时,有效降低压缩信源误码率。

With the analysis of the status of the spaceborne Image compression, the hardware system design based on the DSP A436~(TM) is presented for the frame and broom sensors. Compared with the special encoder, the system has the adjustable compression ration and flexible compression arithmetic program. Because of the parallel procession and prevention error code diffuseness, the scheme decreases the ration of error code effectively while improving the capability of the data procession.