VOICE SIGNAL PROCESSING DEVICE AND VOICE SIGNAL PROCESSING METHOD

摘要

Up-sampler generates an up-sampled sound signal from the sound signal. From the up-sampled sound signal, odd-ordered high-harmonic generator generates an odd-ordered high-harmonic, and even-ordered high-harmonic generator generates an even-ordered high-harmonic. Vowel sound detector identifies whether or not the sound signal is vowel sound, and generates a first gain value and a second gain value. First gain controller amplifies or attenuates the odd-ordered high-harmonic based on the first gain value, and outputs the resultant odd-ordered high-harmonic. Second gain controller amplifies or attenuates the even-ordered high-harmonic based on the second gain value, and outputs the resultant even-ordered high-harmonic. Sound signal processing device adds the gain-adjusted odd-ordered high-harmonic and the gain-adjusted even-ordered high-harmonic to the up-sampled sound signal, and outputs the up-sampled sound signal having the high-harmonics added.

主权项

1. A sound signal processing device comprising:
an up-sampler configured to perform up-sampling of a sampling frequency of a sound signal to generate an up-sampled sound signal; an odd-ordered high-harmonic generator configured to generate an odd-ordered high-harmonic from the up-sampled sound signal; an even-ordered high-harmonic generator configured to generate an even-ordered high-harmonic from the up-sampled sound signal; a vowel sound detector configured to identify whether or not the sound signal vowel sound, and generate a first gain value and a second gain value based on a result of the identification; a first gain controller configured to perform gain adjustment to the odd-ordered high-harmonic by amplification or attenuation based on the first gain value, and output a gain-adjusted odd-ordered high-harmonic; and a second gain controller configured to perform gain adjustment to the even-ordered high-harmonic by amplification or attenuation based on the second gain value, and output a gain-adjusted even-ordered high-harmonic, the sound signal processing device being configured to add the gain-adjusted odd-ordered high-harmonic and the gain-adjusted even-ordered high-harmonic to the up-sampled sound signal, and output the up-sampled sound signal having the gain-adjusted odd-ordered high-harmonic added and the gain-adjusted even-ordered high-harmonic added.