|
A digital signal is a signal that has been quantized from a discrete signal. By quantizing the signal, the values of a discrete signal are no longer continuous but discrete. A signal is an abstract element of information, or (more commonly) a flow of information (in one or more dimensions). ...
Quantization of x using Q(x) = floor(Lx)/L. In digital signal processing, quantization is the process of approximating a continuous signal by a set of discrete symbols or integer values; that is, converting an analog signal to a digital one via analog-to-digital conversion. ...
A discrete signal is a signal that has been sampled from a continuous signal. ...
The word discrete comes from the Latin word discretus which means separate. ...
In most applications, the digital signal's quantization is measured in bits. For example, compact disc audio is signed 16-bit stereo audio sampled at 44.1 kHz, which means each second of CD audio requires 16*2*44,100=1,411,200 bits. A bit (abbreviated b) is the most basic information unit used in computing and information theory. ...
Size of CD compared to pencil. ...
Signedness is a property of an integer number used by the GCC compiler to indicate if variables of that type are capable of storing both positive and negative numbers. ...
Stereo or stereophony generally refers to dual-channel sound recording and sound reproduction – sound that contains data for more than one speaker simultaneously. ...
A kilohertz (kHz) is a unit of frequency equal to 1,000 hertz (1,000 cycles per second). ...
The Digital Revolution Because of the Digital Revolution, the usage of digital signals has increased significantly. The entire Internet is a network of digital signals and mobile phones have migrated from analog signals to digital signals. Dial-up access to the Internet uses standard analog telephone lines which has increasingly been replaced with broadband internet access, which use higher-bandwidth lines that are used strictly in digital means (i.e., an ADSL line is never used for voice communications). The Digital Revolution is a term describing the effects of the rapid drop in cost and rapid expansion of power of digital devices such as computers and telecommunications. ...
For the Analog Science Fiction and Science Fact publication, see Astounding Magazine. ...
Dial-up access is a form of internet access in which the client uses a modem to dial the ISPs node, a dialup server type such as the PPP and TCP/IP protocols to establish a modem-to-modem link, which is then routed to the internet. ...
A telephone handset A touch-tone telephone dial Telephone This article is about telephone technology. ...
Broadband Internet access, often shortened to broadband Internet or just broadband is a high data-transmission rate Internet connection. ...
Analog Bandwidth is the width, usually measured in hertz, of a frequency band f2 − f1. ...
Asymmetric Digital Subscriber Line (ADSL) is a form of DSL, a data communications technology that enables faster data transmission over copper telephone lines than a conventional modem can provide. ...
Human voice consists of sound made by a person using the vocal folds for talking, singing, laughing, screaming or crying. ...
Digital signal processing Digital signals are the basis of digital signal processing. Digital signal processors take digital signals as input and output. Though, an input can be "attached" to an analog-to-digital converter or the output can be "attached" to a digital-to-analog converter thus allowing a digital signal processor to work in mixed-signal circuits. Digital signal processing (DSP) is the study of signals in a digital representation and the processing methods of these signals. ...
A digital signal processor (DSP) is a specialized microprocessor designed specifically for digital signal processing, generally in real-time. ...
AD on USB In electronics, an analog-to-digital converter (abbreviated ADC, A/D, or A to D) is a device that converts continuous signals to discrete digital numbers. ...
In electronics, a digital-to-analog converter (DAC or D-to-A) is a device for converting a digital (usually binary) code to an analogue signal (current, voltage or charges). ...
This article or section should be merged with Mixed-mode_integrated_circuit Mixed-signal circuits refers to integrated circuits (ICs) which have both analog circuits and digital circuits combined on a single semiconductor die. ...
See also |
Feeds |
Contact