signal means
31Smoke signal — The smoke signal is one of the oldest forms of communication in recorded history. It is a form of visual communication used over long distance.In Ancient China, soldiers stationed along the Great Wall would alert each other of impending enemy… …
32Digital signal processing — (DSP) is concerned with the representation of discrete time signals by a sequence of numbers or symbols and the processing of these signals. Digital signal processing and analog signal processing are subfields of signal processing. DSP includes… …
33Mayday (distress signal) — Mayday is an emergency code word used internationally as a distress signal in voice procedure radio communications. It derives from the French venez m aider , meaning come help me . [ [http://www.etymonline.com/index.php?search=mayday… …
34Railway signal — Not to be confused with Railway signalling. A signal is a mechanical or electrical device erected beside a railway line to pass information relating to the state of the line ahead to train/engine drivers. The driver interprets the signal s… …
35Bat-Signal — Infobox comics elements name = Bat Signal imagesize = caption = The Gotham City Police Department with the Bat Signal. Cover of Gotham Central #1. Art by Michael Lark. publisher = DC Comics debut = Detective Comics #60 (February 1942) creators =… …
36Traffic signal preemption — is a type of system that allows the normal operation of traffic lights to be preempted, often to assist emergency vehicles.[1][2] The most common use of these systems is to manipulate traffic signals in the path of an emergency vehicle, stopping… …
37Audio signal processing — Audio signal processing, sometimes referred to as audio processing, is the intentional alteration of auditory signals, or sound. As audio signals may be electronically represented in either digital or analog format, signal processing may occur in …
38Distress signal — Call for help redirects here. For the TV show, see Call for Help. A distress signal is an internationally recognized means for obtaining help. Distress signals take the form of or are commonly made by using radio signals, displaying a visually… …
39Discrete signal — Discrete sampled signal Digital signal (Discrete here …
40Quantization (signal processing) — 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.More specifically, a signal… …
