FPGA implementation of subband image encoder using discrete wavelet transform

The introduction of digital communication networks such as integrated services digital networks (ISDN) and digital storage media have rapidly developed. Due to a large amount of image data, compression is the key technique in still image and video using digital signal processing for transmission and storage. Digital image compression provides solutions for various image applications that represent digital image requiring a large amount of data. The proposed DWT (discrete wavelet transform) filter bank consists of a simple architecture, but it is efficiently designed that a user obtains a wanted compression rate as only the input parameter. If it is implemented by an FPGA chip, the designed encoder operates at 12 MHz