Delta Modulation

Delta modulation is a method used to convert analog signals into digital form by tracking the signal's changes over time. Instead of recording the exact voltage level continuously, it captures whether the signal is going up or down at each step. A simple on-off switch compares the current signal to the previous value and adjusts slightly in that direction. This process creates a series of bits indicating the change, which efficiently represents the original signal with less data. Delta modulation is useful for transmitting audio and other signals where capturing the trend is more important than precise values.