Speech coding: Difference between revisions

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{{more citations needed|date=January 2013}}

'''Speech coding''' is an application of [[data compression]] to [[digital audio]] signals containing [[speech]]. Speech coding uses speech-specific [[parameter estimation]] using [[audio signal processing]] techniques to model the speech signal, combined with generic data compression algorithms to represent the resulting modeled parameters in a compact bitstream.<ref>{{cite journal|first=M. |last=Arjona Ramírez and |first2=M. Minami, "|last2=Minam|title=Low bit rate speech coding," in |journal=Wiley Encyclopedia of Telecommunications, J. G. Proakis, Ed., |city=New York:| publisher=Wiley, |year=2003,| vol.volume= 3, |pp. =1299-1308.}}</ref>

Common applications of speech coding are [[mobile telephony]] and [[voice over IP]] (VoIP).<ref>M. Arjona Ramírez and M. Minami, "Technology and standards for low-bit-rate vocoding methods," in The Handbook of Computer Networks, H. Bidgoli, Ed., New York: Wiley, 2011, vol. 2, pp. 447–467.</ref> The most widely used speech coding technique in mobile telephony is [[linear predictive coding]] (LPC), while the most widely used in VoIP applications are the LPC and [[modified discrete cosine transform]] (MDCT) techniques.{{Citation needed|date=December 2019}}