2017-08-102017-08-102017-03-10MATOS, Edemir Marcus Carvalho de. Qualidade de vídeo baseada em perda de pacotes utilizando o padrão IEEE 802.11AC. Orientador: Evaldo Gonçalves Pelaes; Coorientador: Bruno Souza Lyra Castro.2017. 61 f. Dissertação (Mestrado em Engenharia Elétrica) - Instituto de Tecnologia, Universidade Federal do Pará, Belém, 2017. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/8986. Acesso em:.https://repositorio.ufpa.br/handle/2011/8986The flow of digital multimedia information in wireless networks has grown exponentially due to the popularization of the IEEE 802.11 Standards as access technology, as well as the increase of devices (clients) that operate in this standard. High-resolution video streaming is also becoming commonplace in these networks, driving the development of more efficient CODECs. In this context, some QoE and QoS metrics must be met to deliver quality content to the end user. This dissertation studies the behavior of wireless video streaming using the IEEE 802.11ac standard operating in the 5.2 GHz range, the CODEC rated is the H.264 / AVC for the 720p, 1080p and 2160p resolutions. From the packet loss simulations during video transmission an estimate of the average loss of PSNR for each resolution was developed, finding the relation of the loss of video quality varying the resolution in function of the loss of packets. The proposed model presented good results when compared to the real data, obtaining RMSE of 2.32 dB and standard deviation of 2.2 dB. This modeling can aid in communication network planning as well as enhancement of new source encoders, resulting in a better quality of experience.Acesso AbertoTransmissão de vídeos em redes sem fioDispositivos de redes sem fioTecnologia de acesso IEEE 802.11 acCODEC -Codificador/decodificadorQoS e QoECODEC - Coder-decoderCodificador H.264Streamming of video over wireless networksPSNR - Peak signal to noise ratioDissertaçãoCNPQ::ENGENHARIAS::ENGENHARIA ELETRICA::TELECOMUNICACOES