Voice Conversion Using Different Pitch Shifting Approach over TD-PSOLA Algorithm

Abstract: Voice conversion and voice morphing has numerous applications in the commercial and industrial sectors. This paper emphasizes voice conversion using simple approach of pitch shifting method over TD-POSLA and re-sampling which depends on time stretching or time expanding based on the required target pitch. This study is performed to see the effect of voice conversion when some Telugu/Hindi (alphabets) speech signal is considered. Treatment of certain Telugu/Hindi voiced speech and vowels and the conversion between male, female and child speech has shown some expansion or compression in the resulting speech. The New approach is compared in terms of pitch shifting and computation/processing time with the conventional Time stretching and re-sampling algorithm is presented here. Analysis was performed for both male and female voice of Telugu/Hindi (alphabets) speech.

Keywords: vvoice conversion, voice morphing, PSOLA, re-sampling, pitch shifting, Telugu/Hindi alphabets, speech signals.