关键词: 关键词: 图像压缩, JPEG2000, 并行, 多核, DSP, C6678

Abstract: Abstract: With the continuous development of spaceborne remote sensing technology, the remote sensing data has become increasingly large. At present, the limited bandwidth of communication transmission can not meet the demand of remote sensing image data transmission. Therefore, the research of image compression technology for spaceborne applications is of great significance to the development of space application technology. It is difficult to meet the performance requirements by adopting traditional single-core DSP (Digital Signal Processor), and it is difficult to meet the power demand by adopting Field-Programmable Gate Array (FPGA). In recent years, with the development of hardware technology , Multi-core DSP technology has matured, and the scene in the bomb has been more mature multi-core DSP image compression solution for space-borne application reference. Based on the multi-core DSP, TI's C6678 multi-core floating-point DSP platform, this paper constructs a parallel image compression system and makes full use of the hardware resources of multi-core DSP. The design of parallel model and the planning of DSP internal storage are the focus of the research. Considering the compression of spaceborne remote sensing image has a higher demand for compression quality, compression speed and other indicators, the system uses the JPEG2000 standard as the image compression standard, Using the main core responsible for external communication and internal task allocation, slave core implementation JPEG2000 image compression Of the design. Test results show that the system is stable and reliable, and the overall compression performance is excellent, to meet the satellite remote sensing image compression system performance requirements.

Key words: Keywords: image compression, JPEG2000, parallel, Multicore, DSP(Digital Signal Processing), C6678