Blocking artifact is one of the most annoying artifacts in video and image compression coding. In order to improve the quality of the reconstructed image and video, several deblocking algorithms have been proposed. In this paper, we will introduce these deblocking algorithms and classify them into several categories. On the other hand, the conventional PSNR is widely adopted for estimating the ...

In this paper, a novel compression approach for large Arabic textual images is proposed. Initially, input texts are segmented into patterns which represent sub-words. Then, patterns-matching procedure is used in order to find similar patterns within the image. Finally, to optimize the performances of this approach, an adaptive arithmetic coding is used to encode the resulting data streams. Expe...

MPEG-4 audio represents a new kind of audio coding standard. Unlike its predecessors, MPEG-1 and MPEG-2 high-quality audio coding, and unlike the speech coding standards which have been completed by the ITU-T, it describes not a single or small set of highly e$cient compression schemes but a complete toolbox to do everything from low bit-rate speech coding to high-quality audio coding or music ...

ISSN: 2231-2803 http://www.internationaljournalssrg.org Page 120 Abstract Image compression is a widely addressed researched area. Many compression standards are in place. But still here there is a scope for high compression with quality reconstruction. The JPEG standard makes use of Discrete Cosine Transform (DCT) for compression. In this paper, it presents the new method use of DCT that is im...

In this paper, we present a new method of speech compression and decompression based on a Neural Predictive Coding of speech signals. The NPC system is designed to predict the samples of a speech signal window from previous ones. In the coder/decoder that we proposed the transmitted data is computed from the prediction error of the NPC (difference between the sample and its corresponding predic...

in this paper, a block-based method in wavelet domain for sar image coding is presented based on the ezbc algorithm. to better preserve edges and textural structure in sar images, instead of using traditional dyadic wavelet transform, a packet wavelet is employed. to improve the efficiency of the ezbc algorithm for sar image coding, a modified version of this algorithm, is proposed. this modifi...

The three-dimensional discrete cosine transform (3D DCT) has been used in many 3-D applications such as video coding and compression. Many fast algorithms have been developed for the calculation of 1-D DCT. These algorithms are then used for the calculation of 3-D DCT using the row-column approach. However, 3-D algorithms involve less arithmetic operations and can be faster. In this paper, the ...

The lossless entropy coding used in many image coding schemes often is overlooked as most research is based around the lossy stages of image compression. This paper examines the relative merits of using static Huffman coding with a compact optimal table verses more sophisticated adaptive arithmetic methods. For very low bit rate image compression, the computationally simple Huffman method is sh...