Adaptive Source pixel based Prediction for Lossless Intra Coding of H.264 MPEG-4 /AVC

A new prediction for lossless intra coding technique employs source pixel based prediction in contrast to source block based prediction is presented as an enhancement of H.264/MPEG-4 AVC(Advanced Video Coding) standard. Here, we have worked out technique, to select a significant source block in the macro block adaptively, identified a strong object pixel from that block based on perceptual consideration, which serves as a source pixel to predict the source block and other blocks in the macro block and finally the residuals are entropy coded. The significance of object pixels in the macro block and source block are considered here, to improve the performance of the system. However, the block approach of H.264/AVC is not altered for the transform encoding and decoding process. The experimental result shows that the new method has a compression capability of 28.42% more over the current standard H.264/AVC and 16 % more over modified methods and state of art technologies. This work is aimed to improve the coding efficiency and bit rate for lossless applications. Major applications include still image compression, messaging services, entertainment video and satellite applications etc.