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Comparative study of 24 kb/s ADPCM algorithms

Muhanned AL-Rawi, Muaayed AL-Rawi


The paper is devoted to comparison of four algorithms of 24 kb/s ADPCM, standard ADPCM (ADPCM-1), and three new modified algorithms (ADPCM-2, ADPCM-3, ADPCM-4). The purpose of the modified algorithms is to reduce the nonlinear distortion introduced by ADPCM when high data rate signal passes through it. The performances of the four algorithms are researched using QAM signal at data rate of 9.6kb/s. The simulation results show that the performance of ADPCM-4 is better than that of ADPCM-3, and the performance of ADPCM-3 is better than that of ADPCM-2, and the performance of ADPCM-2 is better than that of ADPCM-1.


24 kb/s; ADPCM algorithms; data transmission

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40, 32, 24, 16 kb/s ADPCM, CCITT Recommendation G.726-1990.

Coding of speech at 8 kb/s using conjugate structure algebraic code excited linear prediction (CSACELP), ITU-T Recommendation G.729-1996.

CHU, W. Speech Coding Algorithms: Foundation and Evolution of Standardized Coders. New York: John Wiley & Sons Inc., 2003.

CHU, W.C. A scalable MELP coder based on embedded quantization of the line spectral frequencies. Proc. of Int. Symp. on Intelligent Signal Processing and Communication Systems, ISPACS, 13–16 Dec. 2005. Hong Kong, 2005, p.29–32. DOI:

DUSAN, S.; FLANAGAN, J.L.; KARVE, A.; BALARAMAN, M. Speech compression by polynomial approximation. IEEE Trans. Audio, Speech, Language Process., v.15, n.2, p.387-395, 2007. DOI:

PATEL, JIGNASA; BARKANA, BUKET. A comparison of LBG and ADPCM speech compression techniques. Proc. of IEEE Int. Joint Conf. on Computer, Information, Systems Sciences, and Engineering, CISSE, 2008.

JAHANGIRI, EHSAN; GHAEMMGHAMI, SHAHROKH. Very low rate scalable speech coding through classified embedded matrix quantization. EURASIP J. Advances Signal Processing, v.2010, 2010. DOI:

SATISH, K.; MUNDRA, M.; DANIEL, C. US Patent 20060171372, 3 Aug. 2006.

LIJUN, T. US Patent 20070153919, 5 July 2007.

YEN-SHIH, L. US Patent 20080109219, 8 May 2008.

SANJEEV, K. US Patent 20090125302, 14 May 2009.

CHU, L. US Patent 201001183092, 22 July 2010.

MARK, R.; YAAKOV, C.; ELI, F. US Patent 20100260273, 14 Oct. 2010.

MARK, R.; ELI, F. US Patent 20100138724, 3 June 2010.

BENVENUTO, N.; DAUMER, W.R. Two approaches for waveform coding of 9.6 kbit/s voiceband data signals through 32 kbit/s ADPCM. IEEE Trans. Commun., v.3, n.3, p.382-385, Mar. 1988. DOI:

SHAMPIRO, Z. US Patent 4860313, 1989.

5-, 4-, 3-, 2- bit/sample embedded ADPCM, CCITT Recommendation G.727-1990.

Comparison of ADPCM algorithms. ITU-T Recommendation G.726. Appendix III-1994.

AL-RAWI, M.; ET AL. Simulation results of newly designed ADPCM for data transmission at 9.6 kb/s. Proc. of Ninth Int. Conf. on Microelectronics, ICM, Bandung, Indonesia, 1997.

Digital circuit multiplication equipment using G.726 ADPCM & digital speech interpolation. ITU-T Recommendation G.763-1998.

ADPCM DCME configuration map report. ITU-T Recommendation G.776.3-2000.

AL-RAWI, M.; ET AL. Computer simulation for newly designed 9.6 kb/s data transmission system over standard ADPCM. Proc. of Ninth Int. Conf. on Microelectronics, ICM, Bandung, Indonesia, 1997.

AL-RAWI, MUHANNED; AL-RAWI, MUAAYED. Modified QAM modem for data transmission at 9.6 Kb/s over ADPCM link. Int. Proc. Computer Sci. Inf. Technol., v.19, p.137, 2011,

AL-RAWI, MUHANNED; AL-RAWI, MUAAYED. Performance of asynchronous tandem standard 32 Kb/s ADPCM systems using QAM signal. Proc. SPIE, v.8350, 2011. DOI:

THOMAS, C. MELVIL; WEIDNER, MICHAEL Y.; DURRANI, S.H. Digital amplitude-phase keying with M-ary alphabets. IEEE Trans. Commun., v.22, n.2, p.168-180, Feb. 1974. DOI:

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