Volume 38 Issue 6
Nov.  2018
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CHEN Cong, ZHANG Xuequan, ZHOU Shengyu. Improvement and Hardware Implementation for Bit Rate Control Algorithm of JPEG-LS[J]. Journal of Space Science, 2018, 38(6): 944-952. doi: 10.11728/cjss2018.06.944
Citation: CHEN Cong, ZHANG Xuequan, ZHOU Shengyu. Improvement and Hardware Implementation for Bit Rate Control Algorithm of JPEG-LS[J]. Journal of Space Science, 2018, 38(6): 944-952. doi: 10.11728/cjss2018.06.944

Improvement and Hardware Implementation for Bit Rate Control Algorithm of JPEG-LS

doi: 10.11728/cjss2018.06.944
  • Received Date: 2017-11-01
  • Rev Recd Date: 2018-06-14
  • Publish Date: 2018-11-15
  • JPEG-LS is a lossless/near-lossless image compression standard based on context modeling. Because of the simplicity and little occupation of resource, it is suitable for satellite image compression where the hardware resource is limited. However, in JPEG-LS near-lossless mode, the bit rate is difficult to control. To solve this problem, a new bit rate control algorithm based on dynamic rate table is proposed based on JPEG-LS. Test results show that the new algorithm is more efficient comparing with the existent bit rate control algorithm. The quality of reconstruction image is also better in the aspects of Peak Signal to Noise Ratio (PSNR) and Structural Similarity Index (SSI). The rate control algorithm can be implemented on Xilinx Virtex4, in which the slice occupancy rate is 21% and the synthesized clock frequency is 60MHz. It can satisfy the demand of satellite image compression.

     

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