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[Atal84] Atal, B. S., and M. R. Schroeder . “Stochastic Coding of Speech Signals at Very Low Bit Rates.” Proc. IEEE Int. Conf. on Communications. Amsterdam, May 1984, p. 48.1.
[Camp91] Campbell, J. P., V. C. Welch, and T. Tremain . “The DOD 4.8 kbps Standard (Proposed Federal Standard 1016),” Advances in Speech Coding (Atal et al., Eds.). Dordrecht, Holland: Kluwer Academic Publishers, 1991.
[Croc83] Crochiere, R. E., and L. R. Rabiner . Multirate Digital Signal Processing. Englewood Cliffs, NJ: Prentice Hall, 1983.
[G722] ITU-T Recommendation G.722. 7 kHz Audio Coding within 64 kbit/s. 1988.