Browsing by Author "Vega, F"

Now showing 1 - 4 of 4

Automatic speech-to-text transcription in an ecuadorian radio broadcast context
(SPRINGER VERLAG, 2017-09-19) Sigcha, E; Espinoza Mejía, Jorge Mauricio; Medina, J; Saquicela Galarza, Víctor Hugo; Vega, F
A key element to enable the analysis and accessing to radio broadcast content is the development of automatic speech-to-text systems. The building of these systems has been possible given the current available of different speech resources, models, and open source services designed mainly for English language. However, the most of these tools have been migrated to other languages like Spanish for avoiding the creation of these systems from scratch. Despite existing efforts there is no clear evidence of the tools that can be used to convert audio to text in other dialects of Spanish. Also, the most of these systems are trained to consider a specific context, therefore, audio transcription systems personalized for a language and a specific context are needed. This article describes the implementation of an architecture oriented to automatic speech-to-text transcription applied on Ecuadorian radio broadcasters, using available free tools for performing audio segmentation and transcription. The selected tools were evaluated measuring their performance and facilities for adjusting to the defined architecture. At the end, a Web application was developed and its final performance was compared with IBM Watson speech to text service; the results show that the proposed system improves the accuracy and achieves a Word Error Rate around 10%. The obtained results allow to suggest the use of a free tools set in order to train models oriented to specific speech-to-text transcription scenarios.
Good living-Sumak Kawsay in the constitution and in the PNBV 2013-2017 of Ecuador [El buen vivir-Sumak Kawsay en la constitución y en el PNBV 2013-2017 del Ecuador]
(UNIVERSIDAD DE ALICANTE, 2014-01-01) Vega, F
This article, in its central part, tries to expose more or less succinctly the importance of the concept of Sumak kausay in the Ecuadorian Constitution and the National Plan for Good Living 2013-2017, showing continuities and differences that obey a and others, the different political moments in which these two documents have been produced: the Constitution, in 2008 at the beginning of the citizen revolution and the Plan of Good Living/Living Well, following the re-election of Rafael Correa for a new presidential term in 2013. During a brief introduction realizes the Ecuadorian historical context background, allowing the emergence of Sumak Kawsay and conclusions some echoes of the political debate over attempts are both Ecuador and Bolivia producing collected government spending Speech Good Living/Living Well programs and projects of real politics.
Mobile teleradiology system suitable for m-health services supporting content and semantic based image retrieval on a grid infrastructure
(INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS INC., 2016-08-16) La Cruz Puente Alexandra; Espinoza Mejía, Jorge Mauricio; Medina Molina, Ruben; Pérez Rocano, Wilson Rodrigo; Saquicela Galarza, Víctor Hugo; Solano Quinde, Lizandro Damián; Vega, F; Vidal, M.-E
Teleradiology systems tackle the problem of transferring radiological images between medical image workstations for facilitating different medical activities, e.g., diagnosis, treatment and follow up a patient, medical training, or consulting second opinion. Nowadays, m-Health (aka mobile health) is becoming popular because of high quality of mobile displays, although remains a work in progress. In this paper a mobile teleradiology system is reported, which main contribution is the development of a platform: (1) supported by a Grid infrastructure, (2) using biomedical ontologies for adding semantic annotations on medical images, and (3) supporting semantic and content-based image retrieval. Images are located physically in different repositories like; hospitals and diagnostic imaging centers. All these features make the system ubiquitous, portable, and suitable for m-Health services.
WebMedSA: A web-based framework for segmenting and annotating medical images using biomedical ontologies
(SPIE, 2015-11-17) Vega, F; Espinoza Mejía, Jorge Mauricio; La Cruz Puente Alexandra; Pérez Rocano, Wilson Rodrigo; Saquicela Galarza, Víctor Hugo; Solano Quinde, Lizandro Damián; Tello Guerrero, Marco Andrés
Advances in medical imaging have fostered medical diagnosis based on digital images. Consequently, the number of studies by medical images diagnosis increases, thus, collaborative work and tele-radiology systems are required to effectively scale up to this diagnosis trend. We tackle the problem of the collaborative access of medical images, and present WebMedSA, a framework to manage large datasets of medical images. WebMedSA relies on a PACS and supports the ontological annotation, as well as segmentation and visualization of the images based on their semantic description. Ontological annotations can be performed directly on the volumetric image or at different image planes (e.g., axial, coronal, or sagittal); furthermore, annotations can be complemented after applying a segmentation technique. WebMedSA is based on three main steps: (1) RDF-ization process for extracting, anonymizing, and serializing metadata comprised in DICOM medical images into RDF/XML; (2) Integration of different biomedical ontologies (using L-MOM library), making this approach ontology independent; and (3) segmentation and visualization of annotated data which is further used to generate new annotations according to expert knowledge, and validation. Initial user evaluations suggest that WebMedSA facilitates the exchange of knowledge between radiologists, and provides the basis for collaborative work among them.