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49 relations: Analog signal, Anomalous propagation, Audio signal, Bit error rate, Broadcast engineering, Broadcasting, Credit rating, Credit rating agency, Credit risk, Data compression, Digital data, Digital radio, Digital subchannel, Digital television, Digital television transition, DVB-T, Economics, Electromagnetic interference, EXIT chart, Forward error correction, Freeze frame television, HD Radio, Hierarchical modulation, High-definition television, In-band on-channel, Inversion (meteorology), Link adaptation, Low-definition television, Macroblock, Mobile phone, Mobile phone signal, Mobile television, Multipath interference, Positive feedback, Rain fade, Receiver (information theory), Satellite television, Scalable Video Coding, Signal strength in telecommunications, Simulcast, Solar transit, Standard-definition television, Subprime mortgage crisis, Synchronization, Telecommunication, Television antenna, Terrestrial television, Video decoder, WMUR-TV.
Analog signal
An analog signal is any continuous signal for which the time varying feature (variable) of the signal is a representation of some other time varying quantity, i.e., analogous to another time varying signal.
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Anomalous propagation
Anomalous propagation (sometimes shortened to anaprop or anoprop) includes different forms of radio propagation due to an unusual distribution of temperature and humidity with height in the atmosphere.
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Audio signal
An audio signal is a representation of sound, typically as an electrical voltage for analog signals and a binary number for digital signals.
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Bit error rate
In digital transmission, the number of bit errors is the number of received bits of a data stream over a communication channel that have been altered due to noise, interference, distortion or bit synchronization errors.
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Broadcast engineering
Broadcast engineering is the field of electrical engineering, and now to some extent computer engineering and information technology, which deals with radio and television broadcasting.
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Broadcasting
Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model.
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Credit rating
A credit rating is an evaluation of the credit risk of a prospective debtor (an individual, a business, company or a government), predicting their ability to pay back the debt, and an implicit forecast of the likelihood of the debtor defaulting.
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Credit rating agency
A credit rating agency (CRA, also called a ratings service) is a company that assigns credit ratings, which rate a debtor's ability to pay back debt by making timely interest payments and the likelihood of default.
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Credit risk
A credit risk is the risk of default on a debt that may arise from a borrower failing to make required payments.
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Data compression
In signal processing, data compression, source coding, or bit-rate reduction involves encoding information using fewer bits than the original representation.
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Digital data
Digital data, in information theory and information systems, is the discrete, discontinuous representation of information or works.
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Digital radio
Digital radio is the use of digital technology to transmit and/or receive across the radio spectrum.
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Digital subchannel
In broadcasting, digital subchannels are a method of transmitting more than one independent program stream simultaneously from the same digital radio or television station on the same radio frequency channel.
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Digital television
Digital television (DTV) is the transmission of television signals, including the sound channel, using digital encoding, in contrast to the earlier television technology, analog television, in which the video and audio are carried by analog signals.
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Digital television transition
The digital television transition, also called the digital switchover, the analog switch-off (ASO), or the analog shutdown, is the process in which older analog television broadcasting is converted to and replaced by digital television.
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DVB-T
DVB-T is an abbreviation for "Digital Video Broadcasting — Terrestrial"; it is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in the UK in 1998.
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Economics
Economics is the social science that studies the production, distribution, and consumption of goods and services.
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Electromagnetic interference
Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction.
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EXIT chart
An extrinsic information transfer chart, commonly called an EXIT chart, is a technique to aid the construction of good iteratively-decoded error-correcting codes (in particular low-density parity-check (LDPC) codes and Turbo codes).
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Forward error correction
In telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.
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Freeze frame television
Freeze frame television: Television in which fixed ("still") images (the frames of the video) are transmitted sequentially at a rate far too slow to be perceived as continuous motion by human vision.
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HD Radio
HD Radio is a trademarked term for iBiquity's in-band on-channel (IBOC) digital radio technology used by AM and FM radio stations to transmit audio and data by using a digital signal embedded "on-frequency" immediately above and below a station's standard analog signal, providing the means to listen to the same program in either HD (digital radio with less noise) or as a standard broadcast (analog radio with standard sound quality).
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Hierarchical modulation
Hierarchical modulation, also called layered modulation, is one of the signal processing techniques for multiplexing and modulating multiple data streams into one single symbol stream, where base-layer symbols and enhancement-layer symbols are synchronously overplayed before transmission.
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High-definition television
High-definition television (HDTV) is a television system providing an image resolution that is of substantially higher resolution than that of standard-definition television, either analog or digital.
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In-band on-channel
In-band on-channel (IBOC) is a hybrid method of transmitting digital radio and analog radio broadcast signals simultaneously on the same frequency.
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Inversion (meteorology)
In meteorology, an inversion is a deviation from the normal change of an atmospheric property with altitude.
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Link adaptation
Link adaptation, or adaptive coding and modulation (ACM), is a term used in wireless communications to denote the matching of the modulation, coding and other signal and protocol parameters to the conditions on the radio link (e.g. the pathloss, the interference due to signals coming from other transmitters, the sensitivity of the receiver, the available transmitter power margin, etc.). For example, WiMAX uses a rate adaptation algorithm that adapts the modulation and coding scheme (MCS) according to the quality of the radio channel, and thus the bit rate and robustness of data transmission.
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Low-definition television
Low-definition television (LDTV) refers to television systems that have a lower screen resolution than standard-definition television systems.
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Macroblock
Macroblock is a processing unit in image and video compression formats based on linear block transforms, such as the discrete cosine transform (DCT).
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Mobile phone
A mobile phone, known as a cell phone in North America, is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
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Mobile phone signal
A mobile phone signal (also known as reception and service) is the signal strength (measured in dBm) received by a mobile phone from a cellular network (on the downlink).
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Mobile television
Mobile television is television watched on a small handheld or mobile device.
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Multipath interference
Multipath interference is a phenomenon in the physics of waves whereby a wave from a source travels to a detector via two or more paths and, under the right condition, the two (or more) components of the wave interfere.
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Positive feedback
Positive feedback is a process that occurs in a feedback loop in which the effects of a small disturbance on a system include an increase in the magnitude of the perturbation.
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Rain fade
Rain fade refers primarily to the absorption of a microwave radio frequency (RF) signal by atmospheric rain, snow, or ice, and losses which are especially prevalent at frequencies above 11 GHz.
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Receiver (information theory)
The receiver in information theory is the receiving end of a communication channel.
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Satellite television
Satellite television is a service that delivers television programming to viewers by relaying it from a communications satellite orbiting the Earth directly to the viewer's location.
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Scalable Video Coding
Scalable Video Coding (SVC) is the name for the Annex G extension of the H.264/MPEG-4 AVC video compression standard.
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Signal strength in telecommunications
In telecommunications, particularly in radio frequency, signal strength (also referred to as field strength) refers to the transmitter power output as received by a reference antenna at a distance from the transmitting antenna.
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Simulcast
Simulcast, a portmanteau of simultaneous broadcast, is the broadcasting of programs or events across more than one medium, or more than one service on the same medium, at exactly the same time (that is, simultaneously).
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Solar transit
In astronomy, a solar transit is a movement of any object passing between the Sun and the Earth.
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Standard-definition television
Standard-definition television (SDTV or SD) is a television system which uses a resolution that is not considered to be either high- or enhanced-definition.
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Subprime mortgage crisis
The United States subprime mortgage crisis was a nationwide banking emergency, occurring between 2007 and 2010, that contributed to the U.S. recession of December 2007 – June 2009.
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Synchronization
Synchronization is the coordination of events to operate a system in unison.
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Telecommunication
Telecommunication is the transmission of signs, signals, messages, words, writings, images and sounds or information of any nature by wire, radio, optical or other electromagnetic systems.
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Television antenna
A television antenna, or TV aerial, is an antenna specifically designed for the reception of over-the-air broadcast television signals, which are transmitted at frequencies from about 41 to 250 MHz in the VHF band, and 470 to 960 MHz in the UHF band in different countries.
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Terrestrial television
Terrestrial or broadcast television is a type of television broadcasting in which the television signal is transmitted by radio waves from the terrestrial (Earth based) transmitter of a television station to a TV receiver having an antenna.
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Video decoder
A video decoder is an electronic circuit, often contained within a single integrated circuit chip, that converts base-band analog video signals to digital components video.
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WMUR-TV
WMUR-TV, virtual channel and VHF digital channel 9, is an ABC-affiliated television station located in Manchester, New Hampshire, United States.
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References
[1] https://en.wikipedia.org/wiki/Cliff_effect
