论文分析了JPEG图像标准和JFIF交换格式,研究了JPEG编解码技术与解压缩过程。在此基础上,选用Handel-C语言进行JPEG解压缩算法实现。在JPEG解码系统中实现了范式Huffman解码算法,并根据2D-IDCT的特点将其转换为分步的一维行列算法,提高了系统的解码速度。经过DK和QuartusⅡ开发工具编辑与编译后,在基于FPGA的DE2开发平台上验证了JPEG图像解压缩算法的可行性。并且在合理利用硬件资源的条件下,通过改进算法结构,有效地实现了算法的并行性。This paper analyzes the JPEG images standards and JFIF exchange format, JPEG decoding technology and unzip process. Based on this, choose Handel-C language to JPEG compression algorithm solution. In JPEG decoding system realize the paradigm Huffman decoding algorithm, and according to the characteristics of the 2 D-IDCT to translate a D step ranks algorithm, and improve the system of the decoding speed. After DK and Quartus Ⅱ development tools editing and compiled in the development platform based on FPGA DE2 validated JPEG images on compressed the feasibility of the algorithm. And in reasonable use hardware resources conditions, through the improved algorithm structure, realize effectively the parallel algorithm.
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This paper analyzes the JPEG images standards and JFIF exchange format, JPEG decoding technology and unzip process. Based on this, choose Handel-C language to JPEG compression algorithm solution. In JPEG decoding system realize the paradigm Huffman decoding algorithm, and according to the characteristics of the 2 D-IDCT to translate a D step ranks algorithm, and improve the system of the decoding speed. After DK and Quartus Ⅱ development tools editing and compiled in the development platform based on FPGA DE2 validated JPEG images on compressed the feasibility of the algorithm. And in reasonable use hardware resources conditions, through the improved algorithm structure, realize effectively the parallel algorithm
This paper analyzes the JPEG image standard and JFIF interchange format, on the JPEG codec technology and decompression process.On this basis, using Handel-C language for JPEG decompression algorithm.In the JPEG decoding system to achieve a paradigm of Huffman decoding algorithm, and according to the characteristics of 2D-IDCT converted to one-dimensional ranks step by step algorithm, improves the decoding speed.After DK and Quartus Ⅱ development tools editor and compiler, based on FPGA development platform of DE2 is verified the feasibility of the algorithm JPEG image decompression.And in the rational use of hardware resources conditions, by improving the algorithm structure, effectively realizes the parallel algorithm.