Adaptive Single Pixel Based Lossless Intra Coding for H.264 / MPEG-4 AVC

Abstract

A new adaptive single pixel based lossless intra coding technique employs pixel based DPCM(Differential Pulse Code Modulation) is presented as an enhancement of H.264/MPEG-4 AVC(Advanced Video Coding) standard.. In this paper, we have addressed a technique to trace a single significant pixel in the source block adaptively based on perceptual considerations, applied pixel wise DPCM for spatial prediction for residual transform coding. However, the block style of H.264/AVC is not troubled for the transform encoding and decoding process. From the experiments, it follows that the new adaptive single pixel based lossless intra coding technique offers a better image quality and good compression ratio as compared with the current standard. If the visual significance of source block is considered for spatial prediction, it offers better results. In this paper, we highlight the exclusion of excess visual data present in both Luma and Chromo components of a video frame for lossless Intra coding of H.264/AVC

Research on the SAR Image Compression Method Based on Sparse Representation

“…Only by saving the coefficients and corresponding coordinates we can get information for representing images, thereby realizing image compression. Sparse representation of images in the over-complete dictionary is a brand new signal representation theory that has been developed in recent years [4][5][6][7]. The key of signal sparse representation is the construction of an over-complete dictionary.…”