Method for synchronizing exporter and exciter clocks

H - Electricity – 04 – H

Patent

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H04H 60/04 (2009.01)

Patent

CA 2600497

A method for synchronizing an exciter clock with a modem frame clock in an IBOC broadcasting system comprises the steps of receiving a plurality of modem frame pulses that are representative of the start of modem frames of audio signals and data signals, wherein timing of the modem frame pulses is controlled by a modem frame clock, producing an exciter clock signal, counting pulses representative of the exciter clock signal to produce a count representative of timing error of each incoming modem frame pulse, and controlling the exciter clock signal in response to the count. An apparatus that performs the method is also provided.

Procédé pour synchroniser une horloge d'excitateur avec une horloge de trame de modem dans un système de radiodiffusion IBOC comprenant les étapes de réception d'une pluralité d'impulsions de trame de modem qui est représentative du début des trames de modem de signaux audio et de signaux de données, la temporisation des impulsions de trame de modem étant commandée par une horloge de trame de modem, de production d'un signal d'horloge d'excitateur, de comptage d'impulsions représentatives du signal d'horloge d'excitateur pour produire un compteur représentatif de l'erreur de temporisation de chaque impulsion de trame de modem entrante et de commande du signal d'horloge d'excitateur en réponse au compteur. Un appareil qui réalise le procédé est également décrit.

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