Repository logo

Browsing by Issue Date, starting with "2011-10-17"

Filter results by year or month
Now showing 1 - 2 of 2
  • High throughput and scalable architecture for unified transform coding in embedded H.264/AVC video coding systems
    Publication . Dias, Tiago; Lopez, Sebastian; Roma, Nuno; Sousa, Leonel
    An innovative high throughput and scalable multi-transform architecture for H.264/AVC is presented in this paper. This structure can be used as a hardware accelerator in modern embedded systems to efficiently compute the 4×4 forward/inverse integer DCT, as well as the 2-D 4×4 / 2×2 Hadamard transforms. Moreover, its highly flexible design and hardware efficiency allows it to be easily scaled in terms of performance and hardware cost to meet the specific requirements of any given video coding application. Experimental results obtained using a Xilinx Virtex-4 FPGA demonstrate the superior performance and hardware efficiency levels provided by the proposed structure, which presents a throughput per unit of area at least 1.8× higher than other similar recently published designs. Furthermore, such results also showed that this architecture can compute, in realtime, all the above mentioned H.264/AVC transforms for video sequences with resolutions up to UHDV.
    2011-10-17Conference object Open access Show more
  • Música e arquitectura: contributos para uma visão integrada da composição
    Publication . Alvim, Diogo d’Aguiar de Sousa; Vargas, António Pinho; Caires, Carlos
    A Música e a Arquitectura relacionam-se desde a descoberta Pitagórica da base aritmética dos intervalos musicais. Ao longo da história, estas relações têm-se manifestado através da matemática e da geometria. Hoje, com o desenvolvimento de cada uma destas artes através da tecnologia, e com a fusão entre disciplinas criativas, surgem novas perspectivas de interacção entre som e espaço, música e arquitectura. Este relatório contextualiza a criação de três projectos que exploram estas relações quer em termos do processo criativo, quer da experiência estética.
    2011-10-17Master thesis Open access Show more