In this paper, first a comparative simulation study of PSNR is done for two quantization tables, one recommended by JPEG committee and another suitable for hardware simplification. Simulation results indicate that quantization table suitable for hardware simplification can be used for designing JPEG baseline coder circuitry. Then we present a simple finite state machine (FSM) based VLSI archite...

Image compression is a method that is used to reduce the irrelevance and redundancy of the image data i.e reduce the storage space for images ,video in order to increase the performance of transmission process in an efficient form without compromising the quality and information of images. This paper deals with two image compression techniques. The first one is Discrete Cosine Transform (DCT) a...

This study presents a design of two-dimensional (2D) discrete cosine transform (DCT) hardware architecture dedicated for High Efficiency Video Coding (HEVC) in field programmable gate array (FPGA) platforms. The proposed methodology efficiently proceeds 2D-DCT computation to fit internal components and characteristics of FPGA resources. A four-stage circuit architecture is developed to implemen...

This paper presents a DWT-DCT-SVD based hybrid watermarking method for color images. Robustness is achieved by applying DCT to specific wavelet sub-bands and then factorizing each quadrant of frequency sub-band using singular value decomposition. Watermark is embedded in host image by modifying singular values of host image. Performance of this technique is then compared by replacing DCT by Wal...

Orthogonal frequency division multiplexing (OFDM) is a peculiar case of multicarrier transmission technique for high speed data transmission over multipath fading channels. The high Peak to Average Power Ratio (PAPR) is one of the most detrimental aspects in the OFDM system, as it degrades the efficiency of the power amplifier in the transmitter. Discrete Cosine Transform-II (DCT-II) is a less ...

Abstract: In paper two types of the discrete cosine (and sine) transforms (DCT/DST) are analyzed. These transforms are useful for many applications. It is shown that if an operator, connected with the Discrete Fourier Transform (DFT), is referred to an appropriate basis it takes block-diagonal form. These blocks coincide with DCT-2/DST-2 for even dimensions of the signals’ space and with DCT6/D...

2-D Discrete Cosine Transform (DCT) applies on image data compression and saves more memories. In this paper, we use fast DCT algorithm, and propose a parallel-pipelined architecture to implement a 8 8× DCT/IDCT processor. This architecture involves two 8-point DCT processors, dual-bank of SRAM (128 words) and the coefficient ROM, three multiplexers, timing controller and 7-bit counter. The ker...

In this paper, modeling of optimized Discrete Cosine Transform (DCT) with reduced hardware and implementation of JPEG Image compression in MATLAB is presented. DCT is the heart of the JPEG image compression. The computation of DCT is hardware intensive and power consumption is also very high. In JPEG Image Compression pipeline, a quantizer follows the DCT. Such structural pipeline is advantageo...

Watermarking is the requirement of today‟s digital media. Embedding of watermark provides security against piracy & attacks .Watermarking is also useful for provide owner identification to digital media. Inthis Research papera new algorithm, for digital image, based on Hybrid DWT-DCT Transformation is proposed. A host image (grey scale) is initially DWT transformed up to 3-level.Thencomputation...