Delta Modulation
Delta Modulation is a simple form of analog-to-digital signal conversion that encodes the difference (delta) between consecutive samples of a signal rather than the absolute value. It uses a 1-bit quantizer to represent whether the signal has increased or decreased since the last sample, making it computationally efficient but prone to slope overload and granular noise. This technique is primarily used in voice coding and low-bit-rate communication systems where simplicity and bandwidth efficiency are prioritized.
Developers should learn Delta Modulation when working on embedded systems, digital signal processing (DSP), or telecommunications projects that require basic analog signal digitization with minimal hardware complexity. It is particularly useful in applications like voice transmission over limited bandwidth channels, such as in early telephony systems or simple audio codecs, where its low bit-rate and straightforward implementation offer advantages over more complex methods like PCM.