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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/994

Title: Image compression scheme using improved basic-lavq and optimized VLC
Authors: Al-Asmari, Awad Kh
Ahmed, Abobakr S.
Al-Doweesh, Abdulla A.
Keywords: Image Compression
Improved Basic-Lavq
Optimized Vlc
Issue Date: 1996
Publisher: King Saud University
Citation: Journal of king Saud University, Engineering Science: 8 (2); 251-266
Abstract: In this paper, a predictive locally adaptive vector quantization (PLA VQ) for real-time image compression is developed and simulated. It is a hybrid of improved predictor, LA VQ and (VLC). The lat-ter is a combination of Laplacian quantizer, Huffman coding, and optimum-modified Bl-code for encod-ing the codewords and indices, respectively. Simulation shows that an improvement in speed of about 76% can be achieved with about 1.1 dB increase in the peak signal-to-noise ratio (PSNR) at the same bit rate. Optimization of the modified B I-code decreases the bit rate with an average of 37% for the same image quality. Simulation data of PSNR and bit rate vs. error threshold can be expressed by a decaying exponen-tial model independent of image type.
URI: http://hdl.handle.net/123456789/994
Appears in Collections:Journal of the King Saud University - Engineering Sciences

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