Method of performing a fast tune for a digital broadcast station in a radio receiver
First Claim
1. A method of performing a fast tune in a receiver for a hybrid broadcast station, wherein said hybrid broadcast station provides an audio broadcast signal at a target frequency channel, wherein said audio broadcast signal contains an analog data signal and a digital data signal, said receiver includes a tuner for selecting said frequency range of said hybrid broadcast station, a digital decoder for decoding said digital data signal and an analog decoder for decoding said analog data signal, wherein said analog data signal may contain an identifying data and said digital data signal contains said identifying data, wherein said identifying data relates to a station and programming content of said audio broadcast signal, said method comprising the steps of:
- identifying said target frequency channel for potentially receiving said hybrid broadcast station;
tuning to said target frequency channel;
attempting to decode said analog data signal;
receiving said identifying data from said analog data signal when said analog data signal is present;
detecting a digital broadcast station in response to said identifying data from said analog data signal;
attempting to decode said digital data signal when said identifying data is not present in said analog data signal, wherein if said digital data signal is present, then said target frequency channel includes a digital main audio program; and
repeating said foregoing steps using a next successive target frequency channel when neither identifying data of said analog or digital data signal are present.
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Accused Products
Abstract
A radio receiver performs a fast tune to a target frequency channel potentially containing a hybrid broadcast signal for determining whether analog signal contained in the hybrid broadcast signal contains an identifying data indicating the presence of a digital broadcast station before attempting to decode a digital signal contained in the hybrid broadcast signal.
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Citations
23 Claims
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1. A method of performing a fast tune in a receiver for a hybrid broadcast station, wherein said hybrid broadcast station provides an audio broadcast signal at a target frequency channel, wherein said audio broadcast signal contains an analog data signal and a digital data signal, said receiver includes a tuner for selecting said frequency range of said hybrid broadcast station, a digital decoder for decoding said digital data signal and an analog decoder for decoding said analog data signal, wherein said analog data signal may contain an identifying data and said digital data signal contains said identifying data, wherein said identifying data relates to a station and programming content of said audio broadcast signal, said method comprising the steps of:
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identifying said target frequency channel for potentially receiving said hybrid broadcast station;
tuning to said target frequency channel;
attempting to decode said analog data signal;
receiving said identifying data from said analog data signal when said analog data signal is present;
detecting a digital broadcast station in response to said identifying data from said analog data signal;
attempting to decode said digital data signal when said identifying data is not present in said analog data signal, wherein if said digital data signal is present, then said target frequency channel includes a digital main audio program; and
repeating said foregoing steps using a next successive target frequency channel when neither identifying data of said analog or digital data signal are present. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A hybrid radio system for performing a fast tune in a radio receiver for a digital broadcast station, wherein said digital broadcast station provides a hybrid broadcast signal, wherein said hybrid broadcast signal contains an analog data signal and a digital data signal, wherein said analog data signal may contain an identifying data and said digital data signal contains an identifying data, wherein said identifying data relates to a station and programming content of said hybrid broadcast signal, said system comprising:
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at least one tuner for receiving said hybrid broadcast signal, said at least one tuner selecting a target frequency channel of said hybrid broadcast signal;
an analog decoder for decoding said analog data signal to detect if said identifying data is present;
a digital decoder for decoding a digital data signal when said identifying data is not present in said analog data signal, wherein if said digital data signal is present, then said target frequency channel includes a digital main audio program; and
a controller for causing said at least one tuner to select a next successive target frequency for detecting a next identifying data when neither identifying data of said analog or digital data signal are present. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification