High quality images and video sequences are important components of multimedia applications and digital video broadcasting environments. Image compression schemes such as JPEG or MPEG are used to reduce the memory requirements for storing or transmitting them. However, the main drawback of these schemes is their symmetrical nature: in both the coding and decoding phase a time-consuming discrete...

In this paper, we explore the technique of colorization for video compression. The chrominance of the intermediate frames is discarded during encoding. At the time of decoding, chrominance values, which are dropped, are approximated from colorizing grayscale frames by transferring color from a source color frame to a targeted grayscale frame. So far human intervention is an integral part of col...

The temporal limitations of the human visual system (HVS) are usually not fully explored in the quantization stage of today’s video encoders. In this paper we present a novel method to improve the compression efficiency of popular video compression algorithms in which the temporal frequency response characteristics of the HVS are taken into account while building macroblockspecific quantization...

Virtually all teleconferencing systems incorporating video use compression algorithms to reduce the video data rate to manageable proportions. For a given bit rate, higher compression brings higher quality, although there can also be disadvantages, such as increased delay. Conferencing implies interconnectability, so the development of appropriate standards has played a vital part in enabling t...

In this work we present a fractal image compression algorithm for inter/intra-frame video coding. We have shown previously how the Iterated TransformationTheory (ITT ) compression algorithm proposed by Jacquin can be modeled as the solution of a second kind twoscale functional equation. This approach allows us to introduce a chain of functional equations which we use to build a pyramid algorith...

The large usage of multimedia applications on internet and mobiles has increased the demand of compressed data, as to reduce the bandwidth requirement and transmission time. So block based method for video compression is getting more importance due to its effectiveness and easy implementation. Fractal video compression follows the property of self-similarity. The weighted finite automata exploi...

In this chapter a general overview of most common approaches to video compression is first provided. Standardization issues are briefly discussed and most recent neural compression techniques reviewed. In addition, a particularly effective novel neural paradigm is introduced and described. The new approach is based on a proper quad-tree segmentation of video frames and is capable to yield a con...

Mosaic images combine information from many video frames into a coherent view of the world observed by a moving camera. They are the basis of a complete and eecient representation of video information, which facilitates its compression and utilization. In mosaic-based compression (MBC), predictions from mosaic images serve to reduce redundancy in the video data. The temporal pyramid of mosaics ...

This paper presents a method for lossy compression of digital video data by parametric line and Natural cubic spline approximation. The method estimates the variation of pixel values in the temporal dimension by taking group of pixels together as keyblocks and interpolating them in Euclidean space. Break and fit criterion is used to minimize the number of keyblocks required for encoding and dec...

Today, several alternatives for compression of digital pictures and video sequences exist to choose from. Beside internationally recognized standard solutions, open access options like the VP8 image and video compression have recently appeared and are gaining popularity. In this paper, we present the methodology and the results of the rate-distortion performance analysis of VP8. The analysis is...