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List Of Broadcasting Terms
This glossary of terms used in broadcasting is a list of definitions of terms and concepts related to both radio broadcasting, radio and television broadcasting, along with the industry in general. A B C D E F G H I J K L M N O P Q R S Technology used to broadcast encrypted signals to be decoded by equipment owned or leased by paid subscribers, as well as the programming services thereby broadcast. T U V W–Z See also *Glossary of journalism *Glossary of motion picture terms *Glossary of video terms References * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broadcasting
Broadcasting is the data distribution, distribution of sound, audio audiovisual content to dispersed audiences via a electronic medium (communication), mass communications medium, typically one using the electromagnetic spectrum (radio waves), in a :wikt:one-to-many, one-to-many model. Broadcasting began with AM radio, which came into popular use around 1920 with the spread of vacuum tube radio transmitters and radio receiver, receivers. Before this, most implementations of electronic communication (early radio, telephone, and telegraph) were wikt:one-to-one, one-to-one, with the message intended for a single recipient. The term ''broadcasting'' evolved from its use as the agricultural method of sowing seeds in a field by casting them broadly about. It was later adopted for describing the widespread distribution of information by printed materials or by telegraph. Examples applying it to "one-to-many" radio transmissions of an individual station to multiple listeners appeared as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asahi Broadcasting Corporation
is a certified broadcasting holding company headquartered in Osaka, Japan. Until March 31, 2018, it was a unified radio and television broadcaster serving in the Kansai region. On April 1, 2018, its radio and television broadcasting divisions were spun off into two subsidiaries, with taking over the radio broadcasting business, and took over television broadcasting. History Radio In 1948, when the Asahi Shimbun set up a committee for a private radio station in Tokyo, the name ABC was decided upon to be the name of the station. Asahi Broadcasting requested licenses in December 1949 to both Tokyo and Osaka, but in December 1950, the original company merged with Tokyo Broadcasting (Dentsu), Yomiuri Broadcasting and Radio Nippon (funded by Mainichi Shimbun) to create Radio Tokyo (JOKR, KRT, now TBS). In 1951, the ABC plan was revived for a new radio station in Osaka. The new Asahi Broadcasting Corporation was founded in Nakanoshima, Kita-ku, Osaka on March 15, 1951, with Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quadrature Amplitude Modulation
Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used in modern telecommunications to transmit information. It conveys two analog message signals, or two digital bit streams, by changing (''modulating'') the amplitudes of two carrier waves, using the amplitude-shift keying (ASK) digital modulation scheme or amplitude modulation (AM) analog modulation scheme. The two carrier waves are of the same frequency and are out of phase with each other by 90°, a condition known as orthogonality or Quadrature phase, quadrature. The transmitted signal is created by adding the two carrier waves together. At the receiver, the two waves can be coherently separated (demodulated) because of their orthogonality. Another key property is that the modulations are low-frequency/low-bandwidth waveforms compared to the carrier frequency, which is known as the In-phase and quadrature components#Narrowband ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Independent Sideband
Independent sideband (ISB) is an AM single sideband mode which is used with some AM radio transmissions. Normally each sideband carries identical information, but ISB modulates two different input signals — one on the upper sideband, the other on the lower sideband. This is used in some kinds of AM stereo (sometimes known as the Kahn system). ISB is a compromise between double sideband (DSB) and single sideband (SSB) — the other is vestigial sideband (VSB). If the sidebands are out of phase with each other, then phase modulation (PM) of the carrier occurs. AM and PM together then create quadrature amplitude modulation (QAM). ISB may or may not have the carrier suppressed. Suppressed-carrier ISB was employed in point-to-point (usually overseas) radiotelephony and radioteletype by shortwave ( HF). In military use, ISB usually referred to a close pair of FSK radioteletype channels which could be demodulated by a single receiver, and employed in fleet bro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multiplexing
In telecommunications and computer networking, multiplexing (sometimes contracted to muxing) is a method by which multiple analog or digital signals are combined into one signal over a shared medium. The aim is to share a scarce resource—a physical transmission medium. For example, in telecommunications, several telephone calls may be carried using one wire. Multiplexing originated in telegraphy in the 1870s, and is now widely applied in communications. In telephony, George Owen Squier is credited with the development of telephone carrier multiplexing in 1910. The multiplexed signal is transmitted over a communication channel such as a cable. The multiplexing divides the capacity of the communication channel into several logical channels, one for each message signal or data stream to be transferred. A reverse process, known as demultiplexing, extracts the original channels on the receiver end. A device that performs the multiplexing is called a multiplexer (MUX), and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AM Stereo
AM stereo is a term given to a series of mutually incompatible techniques for radio broadcasting stereo audio in the AM band in a manner that is compatible with standard AM receivers. There are two main classes of systems: independent sideband (ISB) systems, promoted principally by American broadcast engineer Leonard R. Kahn; and quadrature amplitude modulation (QAM) multiplexing systems (conceptually closer to FM stereo). Initially adopted by many commercial AM broadcasters in the mid to late 1980s, AM stereo broadcasting soon began to decline due to a lack of receivers (most "AM/FM stereo" radios only receive in stereo on FM), a growing exodus of music broadcasters to FM, concentration of ownership of the few remaining stations in the hands of large corporations and the removal of music from AM stations in favor of news/talk or sports broadcasting. By 2001, most of the former AM stereo broadcasters were no longer stereo or had left the AM band entirely. History Early ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aircheck
Aircheck is the radio industry term for a recording that has dual meanings: a demonstration to show off the talent of an announcer or programmer to a prospective employer, and an archival record of content broadcast over-the-air made for legal archiving purposes. With evolving technology, the term came to be applied in the television industry as well. A ''scoped'' (short for "telescoped"—by analogy with pressing the ends of a hand-held telescope to reduce its size) aircheck usually contains only segments where the announcer is actually talking, along with a bit of the music or commercial on either side. In an ''unscoped'' aircheck, all programming is left intact and unedited, including music, commercials, newscasts, jingles and other on-air events. The term is also applied by some to recordings made "off-the-air" by listeners, using consumer or semi-professional equipment. These airchecks became more common with the advent of commercial cassette recorders. History One of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog-to-digital Converter
In electronics, an analog-to-digital converter (ADC, A/D, or A-to-D) is a system that converts an analog signal, such as a sound picked up by a microphone or light entering a digital camera, into a Digital signal (signal processing), digital signal. An ADC may also provide an isolated measurement such as an electronic device that converts an analog input voltage or Electric current, current to a digital number representing the magnitude of the voltage or current. Typically the digital output is a two's complement binary number that is proportional to the input, but there are other possibilities. There are several ADC hardware architecture, architectures. Due to the complexity and the need for precisely matched electronic component, components, all but the most specialized ADCs are implemented as integrated circuits (ICs). These typically take the form of metal–oxide–semiconductor (MOS) mixed-signal integrated circuit chips that integrate both Analogue electronics, anal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Data
Digital data, in information theory and information systems, is information represented as a string of Discrete mathematics, discrete symbols, each of which can take on one of only a finite number of values from some alphabet (formal languages), alphabet, such as letters or digits. An example is a text document, which consists of a string of alphanumeric characters. The most common form of digital data in modern information systems is ''binary data'', which is represented by a string of binary digits (bits) each of which can have one of two values, either 0 or 1. Digital data can be contrasted with ''analog data'', which is represented by a value from a continuous variable, continuous range of real numbers. Analog data is transmitted by an analog signal, which not only takes on continuous values but can vary continuously with time, a continuous real-valued function of time. An example is the air pressure variation in a sound wave. The word ''digital'' comes from the same sour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Analog Signal
An analog signal (American English) or analogue signal (British and Commonwealth English) is any continuous-time signal representing some other quantity, i.e., ''analogous'' to another quantity. For example, in an analog audio signal, the instantaneous signal voltage varies continuously with the pressure of the sound waves. In contrast, a digital signal represents the original time-varying quantity as a sampled sequence of quantized values. Digital sampling imposes some bandwidth and dynamic range constraints on the representation and adds quantization noise. The term ''analog signal'' usually refers to electrical signals; however, mechanical, pneumatic, hydraulic, and other systems may also convey or be considered analog signals. Representation An analog signal uses some property of the medium to convey the signal's information. For example, an aneroid barometer uses rotary position as the signal to convey pressure information. In an electrical signal, the voltage, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Communications And Media Authority
The Australian Communications and Media Authority (ACMA) is an Australian government statutory authority within the Communications portfolio. ACMA was formed on 1 July 2005 with the merger of the Australian Broadcasting Authority and the Australian Communications Authority. ACMA is responsible for collecting broadcasting, radiocommunication and telecommunication taxes, and regulating Australian media. It does this through various legislation, regulations, standards and codes of practice. ACMA is a converged regulator, created to oversee the convergence of telecommunications, broadcasting, radio communications and the internet. Organization ACMA is an independent government agency managed by an executive team comprising the Chair (who is also the Agency Head), Deputy Chair (who is also the chief executive officer). ACMA collects revenue on behalf of the Australian Government through broadcasting, radiocommunications and telecommunications taxes, charges and license fees. It a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ABS-CBN
ABS-CBN is a leading Philippine media and content company. It serves as the flagship media brand of ABS-CBN Corporation, a subsidiary of Lopez Holdings Corporation. Once the country's largest free-to-air television network, ABS-CBN has since evolved into a multiplatform content producer and distributor following the expiration and non-renewal of its broadcast franchise in 2020. The company now syndicates its programming across various platforms, including partner networks, cable channels, streaming services, and digital platforms. ABS-CBN is headquartered at the ABS-CBN Broadcasting Center in Quezon City, with its main operations based in the ELJ Communications Center, which houses its corporate offices and production studios. In February 2025, the company sold a portion of its Quezon City property, including the decommissioned Millennium Transmitter site, to Ayala Land for mixed-use redevelopment. ABS-CBN retained ownership of the ELJ building, which continues to serve as its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
