Patent ID: 8364492
Filing Date: 2013-01-29
Classification: G10L

Abstract:
1. An apparatus for giving an alarm in connection with inputting unvoiced speech, the apparatus comprising: an input unit including an unvoiced speech input device that receives an unvoiced speech, and an ordinary speech input device that receives an ordinary speech; a decision unit that determines whether or not a signal received from the unvoiced speech input device is an ordinary speech, using a signal received from the unvoiced speech input device and a signal received from the ordinary speech input device; and, an alarm unit that outputs an alarm, when a result of the decision made by the decision unit indicates that an ordinary speech is input, wherein the decision unit determines whether or not the signal received from the unvoiced speech input device is an ordinary speech, based on a power of the signal received from the unvoiced speech input device and a power of the signal received from the ordinary speech input device, the decision unit determines whether or not the signal received from the unvoiced speech input device is an ordinary speech, based on a value of an autocorrelation function of the signal received from the unvoiced speech input device, in case the power of the signal received from the unvoiced speech input device and the power of the signal received from the ordinary speech input device are respectively greater than or equal to preset first and second threshold values, the decision unit determines whether or not the signal received from the unvoiced speech input device is an ordinary speech, based on a value of a cross correlation function between the signal received from the unvoiced speech input device and the signal received from the ordinary speech input device, in case the value of the autocorrelation function of the signal received from the unvoiced speech input device is greater than or equal to a preset third threshold value, and the decision unit determines that the signal received from the unvoiced speech input device is an ordinary speech, in case the value of the cross correlation function between the signal received from the unvoiced speech input device and the signal received from the ordinary speech input device is greater than or equal to a preset fourth threshold value.