Evaluation of the Quality of Synthesized Calls of Alexandrine Parakeet (Psittacula Eupatria)
Kamaljit Singh Arora1, Randhir Singh2, Parveen Lehana3
1Kamaljit Singh Arora, M.tech student, Electronics and Communication Engineering Department, Sri Sai College of Engineering and Technology, Badhani, Pathankot, Punjab, India.
2Randhir Singh, Assistant Professor & Head, Electronics and Communication Engineering Department, Sri Sai College of Engineering and Technology, Badhani, Pathankot, Punjab, India.
3Parveen Lehana, Associate Professor, Physics and Electronics Department, Jammu University, J&K, India..
Manuscript received on November 01, 2012. | Revised Manuscript received on November 02, 2012. | Manuscript published on November 05, 2012. | PP: 103-110 | Volume-2 Issue-5, November 2012. | Retrieval Number: E1005102512/2012©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Speech synthesis is one of the interesting research areas now-a-days and it has been explored for various applications including man-machine interaction and telecommunications. Moreover, it can be significantly used as an aid for vocally and blindly handicapped persons, etc. Birds produce vocal calls for different meaningful purposes; for e.g. contact call is used for making a vocal coordination with the movement of flock members for the search of a particular type of vegetation, begging call is generally used by baby birds when they are hungry and thirsty, etc. Synthesis of vocal calls has many applications for e.g. synthesizing an alarm call may be used to protect the bird from any harmful situation, etc. LPC model has the ability to find out speech parameters for efficient speech synthesis. It has been used for speech coding applications because it has the property of low bit rate speech coding. Since the basic mechanism of vocal sound production mechanism in birds is almost similar to the human speech production mechanism in many aspects. LPC based synthesis may be used for the synthesis of the vocal calls of birds. In this paper, LPC based synthesis approach has been successfully used for the vocal calls of Alexandrine parakeet (Psittacula Eupatria) by estimating different speech parameters. The quality of synthesized speech output has been evaluated using visual analysis of spectrograms, subjective and objective assessment methods keeping in view different MOS and PESQ scores. In order to measure the quality of synthesized output, MOS and PESQ scores should be compared to identify the required quality level.
Keywords: LPC synthesis, MOS scores, PESQ, Vocal calls.