Patent
Discrete-continuous companding for a digital transmission system
TLDR
In this article, a delta modulation transmission system is described in which the message signal is effectively compressed at the transmitter and, effectively, complementarily expanded at the receiver, and the transmitter includes a variable size step pulse generator to provide pseudocompression.Abstract:
A delta modulation transmission system is disclosed in which the message signal is, effectively, compressed at the transmitter and, effectively, complementarily expanded at the receiver. The transmitter includes a variable size step pulse generator to provide the pseudocompression and means are provided to vary the magnitude of the step pulse discretely over a part of the dynamic range of the message signal and continuously over another part of the dynamic range of the message signal.read more
Citations
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References
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Patent
Non-linear coder
TL;DR: In a nonlinear voltage digitizer, a capacitor is charged to the level of the input voltage and then discharged at a stepwise increasing rate and clock-pulses are counted until the capacitor is discharged as mentioned in this paper.