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- João Tavares, Jorge L. V. Barbosa, Ismael M. G. Cardoso, Cristiano André da Costa, Adenauer C. Yamin, Rodrigo Araújo Real
- Universal Access in the Information Society
- 2015
This article proposes Hefestos, an intelligent system applied to ubiquitous accessibility. This model uses ubiquitous computing concepts to manage accessibility resources for people with… (More)
- Antonio Navarro, João Tavares
- The 13th IEEE International Symposium on Personal…
- 2002
Our main purpose is to show that when video source coding is dependent on the channel characteristics, better reconstructed video quality can be achieved. Our study considers a fixed overall bit rate… (More)
This paper presents the Hefestos Model, designed to provide ubiquitous accessibility. The project aims at supporting accessibility for People With Disability (PWD) and elderly in various situations… (More)
- João Tavares, Antonio Navarro
- IEEE 15th International Symposium on Personal…
- 2004
We present an adaptive scheme for forward error protection of any video coding standard. The channel coding rate changes according to the channel bit error rate (BER). The results are impressive. For… (More)
- Mehdi Rostami, Joao Angeja, João Tavares, Antonio Navarro
- SPIE Defense + Commercial Sensing
- 2003
The recent rapid growth of multimedia communications has efficiently allowed delivering different services, formats and contents over an enormous variety of digital networks with IP acting as an… (More)
- João Tavares, Antonio Navarro
- VCIP
- 2000
The purpose of our work is to report a solution for the problem of the Joint Source-Channel Coding (JSCC) of the H.263 bit stream to be transmitted through error prone channels. Our investigations… (More)
This paper presents the Hefestos Smart Wheelchair, a wheelchair with sensing capability, designed to provide ubiquitous accessibility. The project aims at supporting accessibility for wheelchair… (More)
- José Miguel Salles Dias, Rafael Bastos, João Fernandes, João Tavares, Pedro Santos
- Gesture Workshop
- 2007
In this work we describe a 3D authoring tool which takes advantage of multimodal interfaces such as gestures and speech. This tool allows real-time Augmented Reality aimed to aid the tasks of… (More)
- M. Rostami, João Tavares, Antonio Navarro
- Proceedings. 28th Euromicro Conference
- 2002
The existing analogue transmission systems perfectly match conventional TV sets allowing various independent viewers to watch different programmes at any time. However, digital TV is rapidly growing… (More)