Delta modulation method and system for signal compression

Details Delta modulation method and system for signal compression Delta modulation method and system for signal compression

1979-10-02

1982-02-02

Nusbaum, Mark E.

Pulse or digital communications

Repeaters

Testing

179 1555T, 375 27, 332 11D, H04B 100

Patent

active

043141056

ABSTRACT:
This delta modulation system uses the differences between three successive samples of a waveform (the i-1, i, and i+1) such that the number of bits per digitization is reduced from four to two. The value vi of the ith sample is calculated by the equation v.sub.i =v.sub.i -1+f(.DELTA..sub.i-1, .DELTA..sub.i), and f is a special function defined by 16 values stored in a read-only memory.

REFERENCES:
patent: 3707680 (1972-12-01), Gabbard et al.
patent: 3821494 (1974-06-01), Besseyre
patent: 3825832 (1974-07-01), Frei et al.
J. Flanagan, "Speech Analysis, Synthesis, Perception," 2nd Ed., Springer-Verlag, New York, 1972, pp. 401-405.

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