JPEG-LS近无损图像编码器VLSI结构设计

doi:10.3969/j.issn.1001-2400.2016.04.014

Abstract

Abstract:

The JPEG-LS image compression standard brings excellent performance and low complexity, which makes it the widely used in space communications, medicine and many other fields. However, the prediction of the current pixel requires the reconstruction value of the previous pixel in the near-lossless mode, which leads to complicated computation and a feedback circuit with long latency in hardware implementations. On the basis of an intensive study of the JPEG-LS algorithm, a forward prediction method of reconstruction value is used and the new VLSI implementation of the JPEG-LS encoder is proposed in this paper, which can avoid the feedback latency. Compared with existing implementations, the proposed one has the advantages of higher encoding speed, no nuse of off-chip storages, and lower power consumption, making it suitable for resource-limited spaceborne image compression.

Key words: image compression, near-lossless, JPEG-LS, forward prediction, FPGA

NIE Yongkang;LEI Jie;LI Yunsong;SONG Changhe;WU Xianyun. VLSI design of the JPEG-LS near-lossless image encoder[J].Journal of Xidian University, 2016, 43(4): 75-80.

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VLSI design of the JPEG-LS near-lossless image encoder

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