Video Coders
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Codificação de vídeo baseada em fractais e representações esparsas / Video coding based on fractals and sparse representations
A video is a sequence of still images representing scenes in motion. A video is a sequence of extremely similar images separated by abrupt changes in their content. If these images were transmitted and stored without any kind of preprocessing, this would require a massive amount of storage space and communication channels with very high bandwidths. Lossy com
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/03/2012
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2. Sistema de codificação de video baseado em transformadas tridimensionais, rapidas e progressivas / Video coding system based on three dimensional, fast and progressive transforms
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
Publicado em: 2007
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3. ALGORITMO RÁPIDO DE ESTIMAÇÃO ADAPTATIVO AO MOVIMENTO APLICADO AO CODIFICADOR PADRÃO H.264/AVC / FAST MOTION ADAPTIVE ESTIMATION ALGORITHM APPLIED TO THE H.261/AVC STANDARD CODER
As técnicas de estimação de movimento utilizadas nos padrões de compressão de vídeo proporcionam a utilização mais eficiente dos recursos de transmissão e armazenamento, através da redução do número de bits necessários para representar um sinal de vídeo e da conservação da qualidade do conteúdo que está sendo processado. O objetivo dessa d
Publicado em: 2007
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4. Study of the audio coding algorithm of the MPEG-4 AAC standard and comparison among implementations of modules of the algorithm
Audio coding is used to compress digital audio signals, thereby reducing the amount of bits needed to transmit or to store an audio signal. This is useful when network bandwidth or storage capacity is very limited. Audio compression algorithms are based on an encoding and decoding process. In the encoding step, the uncompressed audio signal is transformed in
Publicado em: 2007
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5. MATHEMATICAL AND EXPERIMENTAL APPROACHES IN SHAPE-ADAPTATIVE VIDEO CODING / ABORDAGENS MATEMÁTICAS E EXPERIMENTAIS EM CODIFICAÇÃO DE VÍDEO ADAPTATIVA À FORMA
This thesis investigates shape adaptative coding of arbitrarily shaped segments. The texture and contour coding efficiency is discussed and solutions to tackle the associated problems are proposed. The presented methods are evaluated using standard image sequences. A mathematical approach for shape-adaptative transforms using linear operators is developed, f
Publicado em: 2000