Performance comparison of 32 Kbps ADPCM coders in noise-free and noisy environments
Document typeConference report
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessOpen Access
In this paper a comparative study of several schemes for Adaptive Differential Pulse Code Modulation (ADPCM) with backward adaptation is presented. The work here reported shows a tradeoff between a good signal-to-noise ratio and a low degradation of the receiving quality owing to transmission errors in noisy channels. On this second point, the CCITT standard exhibits a superior behavior to the rest of the schemes, whereas its signal-to-noise ratio will result in 2 or 3 dB less than all the schemes if transmission errors are not considered. In addition, a superior perfomance (around 2 dB) of encoders using lattice predictors with respect to those using transversal predictors is also shown.
CitationMasgrau, E., Ruiz, F., Mariño, J.B. Performance comparison of 32 Kbps ADPCM coders in noise-free and noisy environments. A: Mediterranean Electrotechnical Conference. "MELECON 1985: Proceedings of MELECON '85: Mediterranean Electrotechnical Conference: Madrid, Spain: October 8-10, 1985". Madrid: Institute of Electrical and Electronics Engineers (IEEE), 1985, p. 179-182.