PIPELINED ARCHITECTURE OF 2D-DCT, QUANTIZATION AND ZIGZAG PROCESS FOR JPEG IMAGE COMPRESSION USING VHDL

PIPELINED ARCHITECTURE OF 2D-DCT, QUANTIZATION AND ZIGZAG PROCESS FOR JPEG IMAGE COMPRESSION USING VHDL

T.Pradeepthi1 and Addanki Purna Ramesh2

Department of ECE, Sri Vasavi Engg College, Tadepalligudem, West Godavari (dt), Andhra Pradesh, India

ABSTRACT

This paper presents the architecture and VHDL design of a Two Dimensional Discrete Cosine Transform (2D-DCT) with Quantization and zigzag arrangement. This architecture is used as the core and path in JPEG image compression hardware. The 2D- DCT calculation is made using the 2D- DCT Separability property, such that the whole architecture is divided into two 1D-DCT calculations by using a transpose buffer. Architecture for Quantization and zigzag process is also described in this paper. The quantization process is done using division operation. This design aimed to be implemented in Spartan-3E XC3S500 FPGA. The 2D- DCT architecture uses 1891 Slices, 51I/O pins, and 8 multipliers of one Xilinx Spartan-3E XC3S500E FPGA reaches an operating frequency of 101.35 MHz One input block with 8 x 8 elements of 8 bits each is processed in 6604 ns and pipeline latency is 140 clock cycles .

KEYWORDS

JPEG, discrete cosine transform (DCT), quantization, zigzag, FPGA 

Original Source Link : http://aircconline.com/vlsics/V2N3/2311vlsics08.pdf

http://airccse.org/journal/vlsi/vol2.html