HD Radio (HDR)[1] 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.
The term "on channel" is a misnomer because the system actually broadcasts on the ordinarily unused channels adjacent to an existing radio station's allocation. This leaves the original analog signal intact, allowing enabled receivers to switch between digital and analog as required. In most FM implementations, from 96 to 128 kbit/s of capacity is available. High-fidelity audio requires only 48 kbit/s so there is ample capacity for additional channels, which HD Radio refers to as "multicasting".
HD Radio is licensed so that the simulcast of the main channel is royalty-free. The company makes its money on fees on additional multicast channels. Stations can choose the quality of these additional channels; music stations generally add one or two high-fidelity channels, while others use lower bit rates for voice-only news and sports. Previously these services required their own transmitters, often on low-fidelity AM. With HD, a single FM allocation can carry all of these channels, and even its lower-quality settings usually sound better than AM.
While it is typically used in conjunction with an existing channel it has been licensed for all-digital transmission as well. Four AM stations use the all-digital format, one under an experimental authorization, the other three under new rules adopted by the FCC in October 2020. The system sees little use elsewhere due to its reliance on the sparse allocation of FM broadcast channels in North America; in Europe, stations are more tightly spaced.
HDRadio (HDR) is a trademark for an in-band on-channel (IBOC) digital radio broadcast technology. HDradio generally simulcasts an existing analog radio...
following is a list of full-power radio stations and HDRadio subchannels in the United States broadcasting ESPN Radio programming, which can be sorted...
output of a hash function HD Photo, an image format HDRadio, an abbreviation from the term hybrid digital/analog radioHD Voice, or wideband audio Heavy...
Digital Radio Mondiale (DRM), the Japanese ISDB-T and the in-band on-channel technique used in the US and Arab world and branded as HDRadio. An older...
The following is a list of full-power radio stations, HDRadio subchannels and low-power translators in the United States broadcasting Air1 programming...
for small scale transmissions). Similar terrestrial digital radio standards are HDRadio, ISDB-Tb, DRM, and the related DMB. The DAB standard was initiated...
newer digital radio stations transmit in several digital audio standards: DAB (Digital Audio Broadcasting), HDradio, DRM (Digital Radio Mondiale). The...
trims, and an additional two inches of legroom for second-row passengers. HDradio became a standard feature on all trims. Multiple USB ports and power outlets...
Lander. It is also available on HD-2 throughout the state. In September 2016, Wyoming Public Radio launched a fourth radio service, named Wyoming Sounds...
sorted by their call signs, frequencies, band, city of license and state. HDRadio subchannels and low-power translators are not included. NPR station list...
broadcast HDRadio signals, adding full-digital simulcasts of their analog channel, plus the Roots, Rock, and Jazz network on subchannel "HD-2" of the...
HDRadio never achieved widespread popularity in the United States (unlike television, radio is not required to turn off its analog signals due to HD...
its HDRadio platform, and with iHeartRadio for further digital distribution. In the same year, Radio Disney launched a spin-off service, Radio Disney...
as do all digital radio techniques, makes use of advanced compressed audio. The proprietary iBiquity system, branded as HDRadio, is authorized for "hybrid"...
modulation) radio, Digital Audio Broadcasting (DAB), satellite radio, HD (digital) radio, Internet radio, music streaming services, and podcasting. Compared to...
St. Peter. Minnesota Public Radio also broadcasts all three of its services — News, Classical and The Current — on HDRadio in several communities throughout...
in-band on-channel (IBOC) technology, branded as HDRadio, for adding digital subcarriers to AM and FM radio transmissions. This allows AM stations to concurrently...
The Zune HD is a portable media player in the Zune product family released on September 15, 2009, by Microsoft. It was a direct competitor with Apple's...
HD 164595 is a wide binary star system in the northern constellation of Hercules. The primary component of this pair hosts an orbiting exoplanet. The system...
the United States. "UNT KNTU Radio Adds New Antenna and HD Equipment". University of North Texas. 2023-01-05. "Jazz Radio Stations". Radio-Locator.com....
one or more low-power FM translators; 21 full-power FM stations; and one HDRadio digital subchannel which supplements its signal with a low-power FM translator...
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