Patent ID: 8315862
Filing Date: 2012-11-20
Classification: G10L

Abstract:
1. An apparatus comprising: a pitch calculating unit to extract a pitch period of an audio signal; a frequency domain transforming unit to transform the audio signal to a frequency domain; a frequency band dividing unit to divide an entire frequency band into a plurality of frequency bands based on the extracted pitch period, and to classify the transformed audio signal into audio signals for each of the plurality of frequency bands; a pitch enhancement unit to determine a gain based on a volume of the transformed audio signal, and to generate an output signal by multiplying each of the classified audio signals with respect to each of the plurality of frequency bands by the gain, the pitch enhancement unit dividing each of the classified audio signals into a pitch peak area, an intermediate area, and a pitch valley area based on the volume of the classified audio signal, and determining the gain according to each area; and a processor to control at least one of the pitch calculating unit, the frequency domain transforming unit, the frequency band dividing unit, and the pitch enhancement unit.