A **discrete signal** or **discrete-time signal** is a time series, perhaps a signal that has been sampled from a continuous-time signal. Unlike a continuous-time signal, a discrete-time signal is not a function of a continuous-time argument, but is a sequence of quantities; that is, a function over a domain of discrete integers. Each value in the sequence is called a sample. Image File history File links Sampled. ...
Image File history File links Sampled. ...
Image File history File links Digital. ...
Image File history File links Digital. ...
In statistics, signal processing, and econometrics, a time series is a sequence of data points, measured typically at successive times, spaced at (often uniform) time intervals. ...
In information theory, a signal is the sequence of states of a communications channel that encodes a message. ...
In information theory, sampling is the process of converting a continuous signal into a discrete signal. ...
A continuous signal or a continuous time signal is a varying quantity (a signal) that can be, or is expressed, as a continuous function of an independent variable, usually time. ...
In mathematics, a sequence is a list of objects (or events) arranged in a linear fashion, such that the order of the members is well defined and significant. ...
A sample refers to a value or set of values at a point in time and/or space. ...
When a discrete-time signal is a sequence corresponding to uniformly spaced times, it has an associated sampling rate; the sampling rate is not apparent in the data sequence, so may be associated as a separate data item. The sampling frequency or sampling rate defines the number of samples per second taken from a continuous signal to make a discrete signal. ...
## Digital signals
A digital signal is a discrete-time signal that takes on only a discrete set of values. It typically derives from a discrete signal that has been quantized. The term digital signal is used to refer to more than one concept. ...
Quantized signal Digital signal In digital signal processing, quantization is the process of approximating a continuous range of values (or a very large set of possible discrete values) by a relatively-small set of discrete symbols or integer values. ...
Common practical digital signals are represented as 8-bit (256 levels), 16-bit (65,536 levels), 32-bit (4.3 billion levels), and so on, though any number of quantization levels is possible, not just powers of two. 8-bit refers to the number of bits used in the data bus of a computer. ...
In computer science, 16-bit is an adjective used to describe integers that are at most two bytes wide, or to describe CPU architectures based on registers, address buses, or data buses of that size. ...
32-bit is a term applied to processors, and computer architectures which manipulate the address and data in 32-bit chunks. ...
In mathematics, a power of two is any of the nonnegative integer powers of the number two; in other words, two times itself a certain number of times. ...
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