改进的JPEG-LS编码方法在飞行试验中的应用

摘要

In order to study compression performance better compression algorithm,first of all,the JPEG compression algorithm is intro-duced ,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 anal-ysis 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.%为了研究压缩性能更好的压缩算法，首先引出了JPEG 压缩算法，然后提出了一种JPEG-LS 编码改进方法，编码过程遵循JPEG-LS的无损模式；接着深入分析JPEG-LS编码器，该编码器产生比其他的JPEG-LS编码器更高速率的编码效率，利用低复杂度数据链路技术产生很高的操作频率，产生比其他算法更高的吞吐量；同时算法在硬件资源上很有优势，所占用的资源很低；方法有效地提高了视频编码的峰值信噪比，并且输出码率更接近预定带宽要求；理论分析和实验表明提出的编码方法在占用资源和吞吐量方面是非常的有效，对飞行试验中多路高清视频压缩率更高，适合应用于飞行试验机载视频压缩编码和传输中。