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In order to study compression performance better compression algorithm, first of all, the JPEG compression algorithm is introduced ,then it presents an improved method of JPEG-LS encoding, the encoding process followed by the JPEG-LS lossless mode. Then JPEG-LS encoder is proposed, the encoder can generate high speed encoding efficiency than the other JPEG-LS method ,and produces a higher throughput than other algorithms. At the same time, the algorithm has advantages in hardware resources, the resources occupied are very low. The proposed algorithm achieves a higher PSNR in video encoding and is more accurate in output bit-rate control. Theoretical analysis and experiments show that the proposed coding method in the occupied resource and throughput is very effective, in flight test multiple HD video compression rate is higher, and is suitable for application in the flight test of airborne video compression coding and transmission.