A DSP based H.264/SVC decoder for a multimedia terminal

International audienceIn this paper, the implementation of a DSP-based video decoder compliant with the H.264/SVC standard (14496-10 Annex G) is presented. A PC-based decoder implementation has been ported to a commercial DSP. Performance optimizations have been carried out improving the initial version performance about 40% and reaching real time for CIF sequences. Moreover, the performance has been characterized using H.264/SVC sequences with different kinds of scalabilities and different bitrates. This decoder will be the core of a multimedia terminal that will trade off energy against quality of experience

A DSP based SVC IP STB using open SVC decoder

International audienceIn this paper, a implementation of a DSP-based IP set-top box (IP-STB) to decode CIF sequences compliant with the new Scalable Video Coding standard (14496-10 Amd 3) using Open SVC Decoder (OSD) is presented. The OSD software, designed for the PC environment, has been integrated into a previously developed IP-STB prototype. About 15 CIF frames per second can be decoded with the IP-STB

A Test Bench for Distortion-Energy Optimization of a DSP-Based H.264/SVC Decoder

International audienceThis paper describes an OMAP based real-time test bench to find the Pareto frontier of an H.264/SVC decoder within a distortion-energy optimization space. A metric to estimate video distortion is introduced. In addition, energy consumption estimates are obtained from real-time measurements of the computational load. Finally, test bench operation is successfully demonstrated with different H.264/SVC-compliant sets of sequences

Microscòpia aplicada als aliments per al bestiar

Peer Reviewe

A DSP Based H.264 Decoder for a Multi-Format IP Set-Top Box

In this paper, the implementation of a digital signal processor (DSP) based H.264 decoder for a multi-format set-top box is described. Baseline and main profiles are supported. Using several software optimization techniques, the decoder has been fitted into a low-cost DSP. The decoder alone has been tested in simulation, achieving real-time performance with a 600 MHz system clock. Moreover, it has been integrated in a multi-format IP set-top box allowing the implementation of actual environment tests with excellent results. Finally, the decoder has been ported to a latest generation DSP

'Love, Peace, and Unity': Romantic Nationalism and the Role of Oral Literature in Kenya's Secondary Schools

Article

L'Observatoire des agricultures du monde, pour une expertise collective sur la viabilité des agricultures

Cette communication présente les options retenues pour construire une expertise collective internationale fondée sur la mise en réseau d'Observatoires nationaux ou régionaux par rapport aux questions posées par l'avenir des agricultures dans un monde où les ressources non renouvelables sont limitées et où la fragilité des ressources renouvelables est avérée. L'Initiative internationale Observatoire des Agricultures du Monde (OAM) doit être vue comme un processus se construisant par agrégation de porteurs d'intérêts. Un axe de coopération et de collaboration essentiel est le partenariat noué avec la FAO et l'accueil prévu de son Secrétariat exécutif de l'Initiative au sein de cette institution, à Rome. Ce qui fonde l'OAM, ce sont des principes dont nous avons essayé d'expliciter les modalités de mise en oeuvre via un projet pilote du Cirad. Le refus d'un modèle standard défini ex ante n'est pas antinomique de l'impératif de concilier une analyse normée et une capacité d'adaptation aux diverses configurations institutionnelles, de partenariat et de collaboration avec les milieux académiques et les dispositifs d'information existant. Partir du niveau local et construire des dispositifs d'information partagés et maîtrisés par les acteurs tout en gardant une perspective globale sur les déséquilibres mondiaux en ayant le souci d'une action territoriale adaptée à la diversité des situations, telle est l'ambition de l'Initiative Internationale OAM

Hypersonic interference aerothermodynamics

When a vehicle travels at hypersonic speeds during launch, cruise or atmospheric re-entry it is subject to extremely high surface flow temperatures. As well as on the vehicle forebody, extreme heating can take place close to surface protuberances which are almost impossible to avoid in a real flight vehicle. These disturbances interfere with the freestream flow and result in complex viscous interactions which induce a local heat flux augmentation that can become detrimental to the integrity of the vehicle. A greater understanding of these flow phenomena is required. This thesis develops the understanding of the behaviour of the flow around surface protuberances in hypersonic vehicles and presents an engineering approach to predict the location and magnitude of the highest heat transfer rates in their vicinity. To this end, an experimental investigation was performed in a gun tunnel at freestream Mach numbers of 8.2 and 12.3 and Reynolds numbers ranging from Reoo/m=3.35xl0 ⁶ to Reꚙ /m=9.35xl0 ⁶. The effects of protuberance geometry, boundary layer state, freestream Reynolds number and freestream Mach number were assessed. Further understanding of the flowfield was obtained through oil-dot visualisations and highspeed schlieren videos taken at frame rates of up to 50 kHz. Results show the local interference interaction is strongly three-dimensional and is dominated by the incipient separation angle induced by the protuberance. In subcritical interactions - in which the incoming boundary layer remains unseparated upstream of the protuberance - the highest heating occurs adjacent to the device. In supercritical interactions - in which the incoming boundary layer is fully separated ahead of the protuberance - the highest heating generally occurs on the surface just upstream of it. An exception is for low-deflection protuberances under low-Reynolds freestream flow conditions in which case the heat flux to the side is greater

Proporcionalidad en el sistema electoral español

Con motivo de los resultados cosechados en las elecciones generales de 2019 son considerables los vituperios que se han alzado respecto al sistema electoral español. Hay muchos partidos que se ven damnificados por el actual sistema de reparto de escaños, porque no habiendo una gran diferencia en el número de votos obtenido con los otros partidos, la ley electoral favorece que el número de escaños no refleje los votos que han recibido. El objeto de este trabajo de fin de grado es reflexionar/investigar en torno al grado de proporcionalidad del sistema electoral, así como, el efecto que tiene este en la elección de los miembros de las cámaras y la formación del gobierno. Con este fin, las preguntas de investigación son las siguientes: ¿Hasta qué punto es proporcional nuestro sistema?; y ¿Cómo afecta la vigente ley electoral a la constitución del gobierno? En este contexto, la desigualdad entre los partidos mayoritarios y minoritarios hace que los electores voten estratégicamente y no por su opción preferida Las preguntas de investigación se responderán analizando sus elementos más relevantes para las elecciones cómo es el tamaño del congreso, las circunscripciones territoriales, la fórmula de reparto de escaños, la barrera electoral que afecta a las pequeñas formaciones políticas, más se examinara los rendimientos de este sistema y detallara los problemas de esta respecto a la proporcionalidad. Teniendo esto en cuenta, cabría afirmar la necesaria reforma en ciertos aspectos de nuestro sistema electoralDue to the results obtained in the 2019 general elections, which took place in Spain, there are considerable reproaches that have risen with respect to the Spanish electoral system. There are many parties that are affected by the current system for the distribution of seats, because not having a great difference in the number of votes obtained with the other parties, the electoral law makes the number of seats does not reflect the votes they have received. The purpose of this end-of-degree project is to determine the proportionality of the electoral system, as well as its effect on the election of members of the chambers and the formation of the government. To this end, the research questions are as follows: To what extent is our system proportional? And how does the current electoral law affect the government constitution? In this context, the inequality between the majority and minority parties causes voters to vote strategically not for their preferred option The research questions will be answered by analyzing its most relevant elements for the elections, such as the size of the congress, the territorial constituencies, the formula for the distribution of seats, the electoral barrier that affects the small political formations, and the performance of this will be examined. system and detail the problems in this respect to proportionality. Taking this into account, reform in certain aspects of our electoral system could be affirme