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Le terme in-band on-channel (IBOC) désigne une famille de méthodes de transmission d'émissions de radio simultanément en numérique et en analogique (simulcast) sur la même fréquence porteuse.
, IBOC (in-band on-channel) o canal dentro d … IBOC (in-band on-channel) o canal dentro de banda es un sistema de broadcast digital desarrollado por Ibiquity Digital Corporation. La principal característica de este sistema de radiodifusión digital es la permisividad de envío híbrido, es decir, la convivencia de señal analógica y digital, lo que permite una transición gradual de sistema analógico a digital en la zona geográfica donde se aplique. La marca comercial del estándar IBOC es HD Radio.a comercial del estándar IBOC es HD Radio.
, In-band on-channel (IBOC) is a hybrid meth … 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. IBOC relies on unused areas of the existing spectrum to send its signals. This is particularly useful in North America style FM, where channels are widely spaced at 200 kHz but use only about 50 kHz of that bandwidth for the audio signal. In most countries, FM channel spacing may be as close as 100 kHz, and on AM it is only 10 kHz. While these all offer some room for additional digital broadcasts, most attention on IBOC is in the FM band in North American systems; in Europe and many other countries, entirely new bands were allocated for all-digital systems. Digital radio standards generally allow multiple program channels to be multiplexed into a single digital stream. In North American FM, this normally allows two or three high-fidelity signals in one channel, or one high-fidelity signal and several additional channels at medium-fidelity levels that are much higher quality than AM. For even greater capacity, some existing subcarriers can be taken off the air to make additional bandwidth available in the modulation baseband. On FM for instance, this might mean removing stereo from the analog signal, relying on the digital version of that signal to provide stereo where available, and making room for another digital channel. Due to the lack of available bandwidth in AM, IBOC is incompatible with analog stereo, although this is rarely used today, and additional channels are limited to highly compressed voice such as traffic and weather. Eventually, stations can go from digital/analog-hybrid mode to all-digital, by eliminating the baseband monophonic audio.eliminating the baseband monophonic audio.
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IBOC (in-band on-channel) o canal dentro d … IBOC (in-band on-channel) o canal dentro de banda es un sistema de broadcast digital desarrollado por Ibiquity Digital Corporation. La principal característica de este sistema de radiodifusión digital es la permisividad de envío híbrido, es decir, la convivencia de señal analógica y digital, lo que permite una transición gradual de sistema analógico a digital en la zona geográfica donde se aplique. La marca comercial del estándar IBOC es HD Radio.a comercial del estándar IBOC es HD Radio.
, In-band on-channel (IBOC) is a hybrid meth … 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. Eventually, stations can go from digital/analog-hybrid mode to all-digital, by eliminating the baseband monophonic audio.eliminating the baseband monophonic audio.
, Le terme in-band on-channel (IBOC) désigne une famille de méthodes de transmission d'émissions de radio simultanément en numérique et en analogique (simulcast) sur la même fréquence porteuse.
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