无分裂结构的二维小波变换图片处理芯片设计与验证

5/3小波变换硬件实现常用结构是先完成分裂,再依照分裂后的数据完成预测部分和更新部分的变换,这需要复杂的控制结构。在此采用JPEG2000推荐的5/3小波变换公式,在基于行的列变换基础上提出了一种全新的无数据分裂的结构。该结构放弃地址寻址的数据读取模式,采用读取一维数据流节点的输入方式,从对应的寄存器中读取在多个寄存器中依次流动的数据,省略了数据输入的地址控制模块。由于减少了数据分裂步骤,并且无需控制预测及更新步骤的交替进行,因此简化了小波变换控制系统的结构。在此运用软硬件协同的验证方法,利用计算机软件和FPGA结合,完成图片从计算机端输入,在FPGA中完成小波变换,并输出到计算机显示器上显示的步骤。

Design and verification of 2-D wavelet transform image processing chip without splitting structure

The common structure of hardware implementation of 5/3 wavelet transform is to split first and then complete the transform of the prediction part and updated part according to the data collected after split,which needs a complicated control structure.The 5/3 wavelet transform formula recommended by JPEG2000 is adopted and a new structure without data split is proposed based on the row transform of lines.Such a structure abandons the data reading mode depending on addressing but adopts the input mode of reading the one-dimensional data flow nodes.It reads the data which flows in proper order in several registers from its corresponding registers and omits the address control module for data input.The structure of wavelet transform control system is simplified due to the reduction the data split step,and the alternation of prediction and update steps.By employing the verification method of hardware/software cooperation,the picture input from a computer port was achieved,the wavelet transform in FPGA was implemented and the pictures was displayed on the computer monitor in combination with computer software and FPGA.