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What (who) is digital signal - definition
Digital signal
![PAM]] digital signal](https://commons.wikimedia.org/wiki/Special:FilePath/5PAMlevels.png?width=200 "PAM]] digital signal")
![AMI coded]] digital signal used in baseband transmission (line coding)](https://commons.wikimedia.org/wiki/Special:FilePath/AMI-code.png?width=200 "AMI coded]] digital signal used in baseband transmission (line coding)")
![A [[frequency-shift keying]] (FSK) signal is alternating between two waveforms and allows passband transmission. It is considered a means of digital [[data transmission]].](https://commons.wikimedia.org/wiki/Special:FilePath/Frequenzumtastung.jpg?width=200 "A [[frequency-shift keying]] (FSK) signal is alternating between two waveforms and allows passband transmission. It is considered a means of digital [[data transmission]].")
SIGNAL USED TO REPRESENT DATA AS A SEQUENCE OF DISCRETE VALUES
Digital (signal); Digital signals; Digital signal (electronics); Logic signal; Binary signal
A digital signal is a signal that represents data as a sequence of discrete values; at any given time it can only take on, at most, one of a finite number of values. This contrasts with an analog signal, which represents continuous values; at any given time it represents a real number within a continuous range of values.
Digital signal processing
![An example of the 2D discrete wavelet transform that is used in [[JPEG2000]]. The original image is high-pass filtered, yielding the three large images, each describing local changes in brightness (details) in the original image. It is then low-pass filtered and downscaled, yielding an approximation image; this image is high-pass filtered to produce the three smaller detail images, and low-pass filtered to produce the final approximation image in the upper-left.](https://commons.wikimedia.org/wiki/Special:FilePath/Jpeg2000 2-level wavelet transform-lichtenstein.png?width=200 "An example of the 2D discrete wavelet transform that is used in [[JPEG2000]]. The original image is high-pass filtered, yielding the three large images, each describing local changes in brightness (details) in the original image. It is then low-pass filtered and downscaled, yielding an approximation image; this image is high-pass filtered to produce the three smaller detail images, and low-pass filtered to produce the final approximation image in the upper-left.")
MATHEMATICAL SIGNAL MANIPULATION BY COMPUTERS
Signal sampling; Digital Signal Processing; Digtial Signal Processor; Native processing; DIGITAL SIGNAL PROCESSING; Digital transform; Applications of digital signal processing
Digital signal processing (DSP) is the use of digital processing, such as by computers or more specialized digital signal processors, to perform a wide variety of signal processing operations. The digital signals processed in this manner are a sequence of numbers that represent samples of a continuous variable in a domain such as time, space, or frequency.
Digital Signal Processing
MATHEMATICAL SIGNAL MANIPULATION BY COMPUTERS
Signal sampling; Digital Signal Processing; Digtial Signal Processor; Native processing; DIGITAL SIGNAL PROCESSING; Digital transform; Applications of digital signal processing
(DSP) Computer manipulation of analog signals (commonly sound
or image) which have been converted to digital form
(sampled).
(1994-12-07)
Examples of use of digital signal
1. A TI spokesman said FRAM could be embedded in TI‘s digital signal processors or microcontrollers.
2. At the moment 33million TVs are already receiving a digital signal.
3. The SP5050 has DSP (digital signal processing) that helps with reducing background noise, which is quite helpful here.
4. The company specialises in digital signal processing and analogue chips used in mobile telephones, music players and other electronic gadgets.
5. Some viewers in rural areas will not be able to pick up the digital signal until the analogue one has been switched off.