Sistema de codificação de video baseado em transformadas tridimensionais, rapidas e progressivas / Video coding system based on three dimensional, fast and progressive transforms

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

The research on video coding systems has always been looking for techniques that can reach the highest possible compression rate. This compression rate increase is generally achieved by means of increased coding complexity, which is supported by the continuous increase verified in computational power. However, in some video coding and transmission situations, the use of high capacity processors is not possible or desirable. These situations require the development of video coders focused on the achievement of reduced execution times and on the requirement of few computational resources, just as the video coding system proposed in this dissertation. The proposed system uses three dimensional Hadamard transforms, implemented in an efficient way, and adaptive entropy coding with Golomb codes applied to bit planes, whichs adds to the system the desirable characteristic of being progressive. The computational system implementation is designed to perform only fast mathematical operations and to require small computational memory. Even with the use of these constrained techniques, good experimental results, in terms of peak signal to noise ratio (PSNR) versus pixel bit-rate were achieved

ASSUNTO(S)

videodigital videodigital - codificação video coding teoria da codificação hadamard transform compressão de dados (telecomunicações) progressive coding three dimensional coding

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