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To address the issues of On-Board Computer (OBC) design by traditional method for micro-satellite, an advanced OBC based on reconfigurable architecture was presented, and its run-time control scheduling was designed. This reconfigurable OBC could implement supervision which ensured the running status, function reconfiguration which switched its current control modes, restoring reconfiguration through searching and shielding the problem region, and software/hardware upgrading reconfiguration which could accomplish in orbit. Semi-physical simulation platform composed with OBC prototype board, DSpace simulator and laboratory terminal was established, then the performance and run-time control scheduling of this OBC was proved in the platform.

H.264 video compression standard is widely used in video transmission for telecommunications field, with a higher compression ratio and excellent network adaptability. But it also decreases the performance in anti-interference capabilities. More than one frame pictures of encoding data is stored in a data packet, once the data packet occur errors in transmission, the whole frame image is completely lost, and the next several frames can not be decoded well . Therefore, we must take the decoder error conceal technology to improve the ability of error resilient. This paper presents an error conceal method for whole-frame loss by using improved backward motion estimation. More precise quarter-pixel motion estimation to conceal the un-mapped pixel from previous correct decoded frame to current damaged frame is used to improve the quality of reconstructed frame, and spatial conceal method of distance-weighted average method is used to reduce the blocking-effect. Experiment results show it is effective.