Intra Frame Coding in H.264 to Obtain Consistent PSNR and Reduce Bit Rate for Diagonal Down Right Mode Using Gaussian Pulse

Abstract

Intra prediction process of H.264 advanced video coding standard used to code Intra frame to achieve higher coding efficiency. Rate Distortion Optimization (RDO) method of H.264 use to code Intra frame in intra prediction process. This method increases more computational complexity and difficult to implement in real time applications. The previous work on Intra frame coding was achieved increased in Bit rate, degradation/loss of PSNR and reduction of computational complexity for different quantization parameters. In this paper developed a better approach for Intra frame coding using Gaussian pulse and diagonal down right mode to achieve higher coding performance. The proposed algorithm is based on Gaussian pulse which is multiplied with each 4 × 4 transformed coefficients of 4 × 4 sub macro block of Intra frame before quantization block which provides signal in smooth and avoids image get degrade and achieve reduced bit rate for coarse quantization parameters. The proposed algorithm implemented using MATLAB and compared with original JM18.6 reference algorithm of H.264. The results of proposed method are compared with previous algorithm Jin Wan et al. The simulation results of the proposed algorithm achieved consistent PSNR and reduced in bit rate of 27.38% QCIF and 30.63% CIF sequences for diagonal down right intra prediction mode using Gaussian pulse compared with previous algorithm Jin Wan et al.