Music Segmentation and Similarity Estimation Applied to a Gaze-Controlled Musical Interface

Assistive technology, especially gaze-controlled, can promote accessibility, health care, well-being and inclusion for impaired people, including musical activities that can be supported by interfaces controlled using eye tracking. Also, the Internet growth has allowed access to a huge digital music database, which can contribute to a new form of music creation. In this paper, we propose the application of Music Information Retrieval techniques for music segmentation and similarity identification, aiming at the development of a new form of musical creation using an automatic process and the optimization algorithm Harmony Search to combine segments. These techniques for segmentation and similarity of segments were implemented in an assistive musical interface controlled by eye movement to support musical creation and well-being. The experimental results can be found in [https://bit.ly/2Zl7KSC]

Interface Computacional para Controle Musical Utilizando os Movimentos dos Olhos

O último censo demográfico do Brasil relata que cerca de 13,1 milhões de pessoas se declaram com alguma deficiência do tipo motora. O avanço tecnológico tem contribuí­do na promoção da acessibilidade e inclusão por meio das técnicas de tecnologia assistiva. Este trabalho apresenta uma interface computacional para controle musical, porém com foco em promover acessibilidade e inclusão a inúmeras pessoas. Por meio do movimento dos olhos o usuário pode controlar uma interface gráfica que envia mensagens (MIDI) para o software Ableton Live com objetivo de controlar a execução sonora. Visando o uso por pessoas leigas no campo musical, a interface proporciona indicações de escolhas para direcionar o usuário a gerar sons mais conexos. As indicações podem ser configuradas de forma manual ou automatizada com auxí­lio do algoritmo de agrupamento K-means

Interface Computacional para Controle Musical Utilizando os Movimentos dos Olhos

O último censo demográfico do Brasil relata que cerca de 13,1 milhões de pessoas se declaram com alguma deficiência do tipo motora. O avanço tecnológico tem contribuído na promoção da acessibilidade e inclusão por meio das técnicas de tecnologia assistiva. Este trabalho apresenta uma interface computacional para controle musical, porém com foco em promover acessibilidade e inclusão a inúmeras pessoas. Por meio do movimento dos olhos o usuário pode controlar uma interface gráfica que envia mensagens (MIDI) para o software Ableton Live com objetivo de controlar a execução sonora. Visando o uso por pessoas leigas no campo musical, a interface proporciona indicações de escolhas para direcionar o usuário a gerar sons mais conexos. As indicações podem ser configuradas de forma manual ou automatizada com auxílio do algoritmo de agrupamento K-means

Music Segmentation and Similarity Estimation Applied to a Gaze-Controlled Musical Interface

Assistive technology, especially gaze-controlled, can promote accessibility, health care, well-being and inclusion for impaired people, including musical activities that can be supported by interfaces controlled using eye tracking. Also, the Internet growth has allowed access to a huge digital music database, which can contribute to a new form of music creation. In this paper, we propose the application of Music Information Retrieval techniques for music segmentation and similarity identification, aiming at the development of a new form of musical creation using an automatic process and the optimization algorithm Harmony Search to combine segments. These techniques for segmentation and similarity of segments were implemented in an assistive musical interface controlled by eye movement to support musical creation and well-being. The experimental results can be found in [https://bit.ly/2Zl7KSC]

Increasing the reach of visible light communication links through constant-envelope OFDM signals

The transmission of constant-envelope orthogonal frequency division multiplexing (CE-OFDM) signals, based on electrical phase modulation, was shown to improve the tolerance to noise and the nonlinearity introduced by light-emitting diodes (LEDs) in visible light communication (VLC) systems. This allows the application of larger signal amplitudes despite the LED-nonlinearities and, thus, data transmission over larger distances. The performance of a 9.51 Mb/s CE-OFDM based system, with 16-QAM subcarrier mapping in a bandwidth of 5 MHz, was compared to the efficiency of a conventional OFDM system. The error vector magnitude (EVM) was reduced from 17.5% to 10% (which is below the FEC limit), an improvement around 43%, when the CE-OFDM scheme was applied in the VLC link of 6 m. A good performance was achieved by the CE-OFDM based VLC system in a link of 8 m, when 4-QAM was used as subcarrier mapping

Performance Evaluation of a Simplified Power-Domain NOMA for Visible Light Communications

The performance of a visible light communication (VLC) system based on power domain non-orthogonal multiple access (PD-NOMA) is experimentally evaluated in this paper. The simplicity of the adopted non-orthogonal scheme is provided by the fixed power allocation method at the transmitter and the single one-tap equalization executed before the successive interference cancellation at the receiver. The experimental results proved the successful transmission of the PD-NOMA scheme with three users in VLC links of up to 2.5 m, after a proper choice of the optical modulation index. All users achieved error-vector magnitude (EVM) performances below FEC limits in all evaluated transmission distances. At 2.5 m, the user with the best performance reaches an EVM = 2.3 %