We compare the performance of video compression algorithms in terms of compression ratio, video distortion and computation time in order to study the feasibility of a real time software videophone for 64 kbits/s channels, with exible user deened compression methods. We can combine and adjust the compression algorithms to the required bandwidth and video quality. We introduce the double logarith...

The recent emergence of multimedia applications in the last few years has motivated a considerable interest in the development of video compression algorithms aimed at the transmission (or storage) of video sequences at a variety of bandwidths. The ability to code, decode and display a video at different resolutions is of fundamental importance for a large class of applications such as: multipo...

Overheads associated with MPEG-4 video compressed packets reduce bandwidth efficiency. Mobile operators may save a significant percentage of the required bandwidth using IP header compression technologies, and thereby reduce necessary investments. In this paper, a novel header compression scheme for MPEG-4 video packets is proposed and analysed. It is designed to complement existing IP header c...

Motion Estimation is key role in the world of video compression. Compression is a technique for compacting a video data used for easily transmitting over a network and reducing a size for storage. Motion Estimation is computationally complex while video is compressed. This paper describes three step search algorithm and logarithmic search algorithm used for Motion Estimation in video Compressio...

If a piece of picture could contain a sequence of video frames, it is amazing. This paper develops a new video compression approach based on underdetermined blind source separation. Underdetermined blind source separation, which can be used to efficiently enhance the video compression ratio, is combined with various off-the-shelf codecs in this paper. Combining with MPEG2, video compression rat...

The compression of digital video data has many applications in the transmission and storage of video sequences. For moderate compression ratios there are many techniques which can provide satisfactory performance, for high compression ratios, however, typical compression techniques produce noticeable artifacts in the reconstructed video. This paper proposes a technique for the post-processing o...