Abstract
In speech communication under digital mobile telephone network environment, It needs to process speech signal before it sends. In this process, it is the first consideration to extract the formant information contained in speech signal. The formant refers to the peak of the spectrum signal envelop responding to the vocal tract filter in the frequency domain. To extract the formant, the LPC parameter is calculated and then, is converted to LSP coefficient, in which process the influence of fundamental frequency (the pitch) is great. Particularly, in case of female speech, since the fundamental frequency and the first formant are located in almost same position, LSP resolution is reduced significantly.
In this study, a simple method is proposed to improve the accuracy of LSP through the process of compensating the fundamental frequency using the alteration of the pitch, that is, it is the method to extract the LSP coefficient accurately after accentuating the characteristics of the formant by reducing the high fundamental frequency to increase the pitch, the number of harmonics.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
Han, J.-S.: Speech signal processing. Osungmedia, 12, 60–61 (2003)
Rabiner, L.R., Schafer, R.W.: Digital processing of Speech Signal, pp. 38–115 (1978)
Bae, M.-J.: Digital speech synthesis. Dongyoung, pp. 225–227
Seo, J.-H., Kim, J.-K., Bae, M.-J.: The study on improving pitch detection using LSP to obtain high speech quality inspeech synthesis. Acoustical Society of Korea 29(1), 69–75 (2010)
Bae, M.-J., Lee, S.-H.: Digital speech analysis, Dongyoung, pp. 84–95 (1994)
Young-Hwan, O.: Speech language information processing, Hongreung-Science, pp. 24–25 (1998)
Kondoz, A.M.: Digital Seech, pp. 84–95. John & Sons Ltd. (1994)
Min, S.-Y.: A study on the Reduction of LSP Transformation time in Speech Coder for CDMA Digital Cellular System. The Korea Academia-Industrial Cooperation Society 8(3), 563–568 (2007)
Min, S.-Y., Kim, Y.-K.: The Technique of Spectrum Flattening by Algorithm for Minimized harmonics Variance Value. The Korea Academia-Industrial Cooperation Society 11(9), 3558–3562 (2010)
Oppenheim, A.V., Schafer, R.W.: Homomophic Analysis of speech. IEEE Trans. Audio Electroacoust. AU-16, 221–226 (1968)
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Baek, G., Kim, E., Bae, MJ. (2012). A Study on Improving Accuracy of LPC Transmission Parameter under Digital Mobile Telephone Network. In: Lee, G., Howard, D., Ślęzak, D., Hong, Y.S. (eds) Convergence and Hybrid Information Technology. ICHIT 2012. Communications in Computer and Information Science, vol 310. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32692-9_86
Download citation
DOI: https://doi.org/10.1007/978-3-642-32692-9_86
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-32691-2
Online ISBN: 978-3-642-32692-9
eBook Packages: Computer ScienceComputer Science (R0)