Digital Audio Broadcasting (DAB) is a digital radio standard for broadcasting digital audio radio services in many countries around the world, defined, supported, marketed and promoted by the WorldDAB organisation. The standard is dominant in Europe and is also used in Australia, and in parts of Africa and Asia; as of 2022, 55 countries are actively running DAB broadcasts.
AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave transmissions, but also on the longwave and shortwave radio bands.
Radio broadcasting is the broadcasting of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast by a satellite in Earth orbit. To receive the content the listener must have a broadcast radio receiver (radio). Stations are often affiliated with a radio network that provides content in a common radio format, either in broadcast syndication or simulcast, or both. Radio stations broadcast with several different types of modulation: AM radio stations transmit in AM, FM radio stations transmit in FM, which are older analog audio standards, while newer digital radio stations transmit in several digital audio standards: DAB, HD radio, DRM. Television broadcasting is a separate service that also uses radio frequencies to broadcast television (video) signals.
In-band on-channel (IBOC) is a hybrid method of transmitting digital radio and analog radio broadcast signals simultaneously on the same frequency. The name refers to the new digital signals being broadcast in the same AM or FM band (in-band), and associated with an existing radio channel (on-channel). By utilizing additional digital subcarriers or sidebands, digital information is "multiplexed" on existing signals, thus avoiding re-allocation of the broadcast bands.
C-QUAM is the method of AM stereo broadcasting used in Canada, the United States and most other countries. It was invented in 1977 by Norman Parker, Francis Hilbert, and Yoshio Sakaie, and published in an IEEE journal.
Digital Radio Mondiale is a set of digital audio broadcasting technologies designed to work over the bands currently used for analogue radio broadcasting including AM broadcasting—particularly shortwave—and FM broadcasting. DRM is more spectrally efficient than AM and FM, allowing more stations, at higher quality, into a given amount of bandwidth, using xHE-AAC audio coding format. Various other MPEG-4 codecs and Opus are also compatible, but the standard now specifies xHE-AAC.
Digital radio is the use of digital technology to transmit or receive across the radio spectrum. Digital transmission by radio waves includes digital broadcasting, and especially digital audio radio services.
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.
Station identification is the practice of radio and television stations and networks identifying themselves on-air, typically by means of a call sign or brand name. This may be to satisfy requirements of licensing authorities, a form of branding, or a combination of both. As such, it is closely related to production logos, used in television and cinema alike.
HD Radio (HDR) is a trademark for an in-band on-channel (IBOC) digital radio broadcast technology. HD radio generally simulcasts an existing analog radio station in digital format with less noise and with additional text information. HD Radio is used primarily by AM and FM radio stations in the United States, U.S. Virgin Islands, Canada, Mexico and the Philippines, with a few implementations outside North America.
FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to transmit high-fidelity sound over broadcast radio. FM broadcasting offers higher fidelity—more accurate reproduction of the original program sound—than other broadcasting techniques, such as AM broadcasting. It is also less susceptible to common forms of interference, having less static and popping sounds than are often heard on AM. Therefore, FM is used for most broadcasts of music and general audio. FM radio stations use the very high frequency range of radio frequencies.
DTS, Inc. is an American company. DTS company makes multichannel audio technologies for film and video. Based in Calabasas, California, the company introduced its DTS technology in 1993 as a competitor to Dolby Laboratories, incorporating DTS in the film Jurassic Park (1993). The DTS product is used in surround sound formats for both commercial/theatrical and consumer-grade applications. It was known as The Digital Experience until 1995. DTS licenses its technologies to consumer electronics manufacturers.
Compatible Amplitude Modulation - Digital or CAM-D is a hybrid digital radio format for AM broadcasting, proposed by broadcast engineer Leonard R. Kahn.
FMeXtra is a deprecated in-band on-channel digital radio broadcasting technology created by Digital Radio Express. It was intended to allow a second all-digital signal to be simulcast with an existing analog FM radio station, offering a less noisy signal that would be particularly useful in urban environments where multipath distortion can seriously degrade analog FM transmissions. It can also support a second all-digital channel at the same frequency, allowing two channels to be broadcast by a single FM station.
WZZO is a commercial radio station licensed to Bethlehem, Pennsylvania. It is branded as "WZZO: The Valley's Real Rock Station".
WWWE is a commercial AM radio station licensed to Hapeville, Georgia and serving the Atlanta metropolitan area. Owned by Beasley Broadcasting Group, Inc., the station airs an urban adult contemporary/talk/sports radio format, with some hours of the broadcast day being paid brokered programming. WWWE is co-owned with WAEC in Atlanta, Georgia.
KVUD is a radio station broadcasting a Spanish Christian adult contemporary music format. Licensed to Bay City, Texas, United States, the station is currently owned by the KSBJ Educational Foundation. KVUD is licensed to use HD Radio, but is not currently broadcasting in HD. Its studios are located in Humble. KVUD's transmission site is located northeast of Palacios in extreme southwestern Matagorda County.
WCLT-FM is a commercial radio station broadcasting a country music radio format. It is owned by WCLT Radio and uses the slogan Today's Country and Your All-Time Favorites, T-100. Licensed to Newark, Ohio, it serves the Columbus metropolitan area. In morning drive time, T-100 carries the syndicated Big D and Bubba Show.
Xperi Inc. is an American multinational technology company headquartered in San Jose, California, that develops software solutions for consumer electronics and connected cars, as well as media platform solutions for video service over broadband. The company is organized into four business units: Pay-TV, Consumer Electronics, Connected Car, and Media Platform. Xperi's brands include DTS®, HD Radio™, TiVo®, and IMAX Enhanced.
WAKS-HD2 is a digital subchannel of WAKS, a commercial radio station licensed to Akron, Ohio, which features an urban contemporary format known as "Real 106.1". Owned by iHeartMedia, Inc., WAKS-HD2 serves Greater Cleveland and surrounding Northeast Ohio and is the FM radio home of Cleveland Charge basketball. Using the proprietary technology HD Radio for its main digital transmission, WAKS-HD2 is also rebroadcast over low-power analog translator W291BV (106.1 FM), and streams online via iHeartRadio. WAKS-HD2's studios are located at the Six Six Eight Building in downtown Cleveland's Gateway District, while the WAKS-HD2 and W291BV transmitters reside in Brecksville and Parma, respectively.
