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Détails bibliographiques
Auteur principal:	Guillermo Arturo Martínez Mascorro
Format:	Artículo científico
Langue:	es
Publié:	Universidad Politécnica Salesiana 2013
Sujets:	Ingeniería banda espectrograma máquina de soporte vectorial parámetros cepstrales basados en sub coeficientes cepstrales en la frecuencia de Mel
Accès en ligne:	https://www.redalyc.org/articulo.oa?id=505554816003
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Reconocimiento de voz basado en MFCC, SBC y Espectrogramas Guillermo Arturo Martínez Mascorro Gualberto Aguilar Torres Ingeniería banda espectrograma máquina de soporte vectorial parámetros cepstrales basados en sub coeficientes cepstrales en la frecuencia de Mel Uno de los problemas en los sistemas de reconocimiento automático de hablante son los cambios en la voz. Comúnmente, una persona puede tener cambios voluntarios e involuntarios (también naturales y artificiales) que provocan confusiones en el sistema, los cambios en la voz también pueden ser naturales y artificiales. En el artículo presente se propone un sistema de reconocimiento a través de una identificación en paralelo, usando tres algoritmos: MFCC, SBC y el espectrograma. Empleando una máquina de soporte vectorial como clasificador, cada algoritmo arroja un grupo de personas con las probabilidades más altas y después de una evaluación, se toma una decisión. El objetivo de este artículo es tomar ventaja de los tres algoritmos. 2013 artículo científico 1390-650X https://www.redalyc.org/articulo.oa?id=505554816003 es http://www.redalyc.org/revista.oa?id=5055 Ingenius. Revista de Ciencia y Tecnología application/pdf Universidad Politécnica Salesiana Ingenius. Revista de Ciencia y Tecnología (Ecuador) Num.10

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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