Apparatus for and method of receiving broadcasting signals
First Claim
1. An apparatus for receiving broadcasting signals comprising:
- a signal selecting and receiving portion for selecting one of digital audio broadcasting signals to receive, a first decoding portion for obtaining program information data and control information data based on the selected digital audio broadcasting signal received by said signal selecting and receiving portion, a program extracting portion for extracting audio program data from the program information data obtained from said first decoding portion, a second decoding portion for decoding the audio program data obtained from said program extracting portion to obtain a digital audio signal, a sound reproducing portion for reproducing sound based on the digital audio signal obtained from said second decoding portion, and an operation control portion to which the control information data obtained from said first decoding portion are supplied, wherein said operation control portion is operative to detect a condition in which the selected digital audio broadcasting signal has not been appropriately received by said signal selecting and receiving portion for more than a predetermined period and, when the condition is detected, to perform a control operation in such a manner as to cause said signal selecting and receiving portion to select another digital audio broadcasting signal to receive in accordance with indication by the control information data in the case where the control information data obtained based on the selected digital audio broadcasting signal indicate the existence of some other digital audio broadcasting signal which is to be received in place of the selected digital audio broadcasting signal, and to cause said signal selecting and receiving portion to change a receiving frequency successively within a predetermined frequency range so as to detect receivable digital audio broadcasting signals one by one and to store in a memory portion control information data obtained from said first decoding portion based on each receivable digital audio broadcasting signal detected by said signal selecting and receiving portion in the case where the control information data obtained based on the selected digital audio broadcasting signal do not indicate the existence of any digital audio broadcasting signal which is to be received in place of the selected digital audio broadcasting signal.
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Accused Products
Abstract
An apparatus for receiving broadcasting signals, which comprises a signal selecting and receiving portion for selecting one of ensembles to receive, a channel decoder for obtaining program information data and control information data based on the selected ensemble received by the signal selecting and receiving portion, and a control unit operative to detect a condition in which the selected ensemble has not been appropriately received by the signal selecting and receiving portion for more than a predetermined period and, when the condition is detected, to perform a control operation in such a manner as to cause the signal selecting and receiving portion to select another ensemble to receive in accordance with indication by the control information data in the case where the control information data obtained based on the selected ensemble indicate the existence of some other ensemble which is to be received in place of the selected ensemble, and to cause said signal selecting and receiving portion to change a receiving frequency successively so as to detect receivable ensembles one by one and to store in a memory portion control information data obtained from the channel decoder based on each receivable ensemble detected by said signal selecting and receiving portion in the case where the control information data obtained based on the selected ensemble do not indicate the existence of any ensemble which is to be received in place of the selected ensemble.
16 Citations
20 Claims
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1. An apparatus for receiving broadcasting signals comprising:
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a signal selecting and receiving portion for selecting one of digital audio broadcasting signals to receive, a first decoding portion for obtaining program information data and control information data based on the selected digital audio broadcasting signal received by said signal selecting and receiving portion, a program extracting portion for extracting audio program data from the program information data obtained from said first decoding portion, a second decoding portion for decoding the audio program data obtained from said program extracting portion to obtain a digital audio signal, a sound reproducing portion for reproducing sound based on the digital audio signal obtained from said second decoding portion, and an operation control portion to which the control information data obtained from said first decoding portion are supplied, wherein said operation control portion is operative to detect a condition in which the selected digital audio broadcasting signal has not been appropriately received by said signal selecting and receiving portion for more than a predetermined period and, when the condition is detected, to perform a control operation in such a manner as to cause said signal selecting and receiving portion to select another digital audio broadcasting signal to receive in accordance with indication by the control information data in the case where the control information data obtained based on the selected digital audio broadcasting signal indicate the existence of some other digital audio broadcasting signal which is to be received in place of the selected digital audio broadcasting signal, and to cause said signal selecting and receiving portion to change a receiving frequency successively within a predetermined frequency range so as to detect receivable digital audio broadcasting signals one by one and to store in a memory portion control information data obtained from said first decoding portion based on each receivable digital audio broadcasting signal detected by said signal selecting and receiving portion in the case where the control information data obtained based on the selected digital audio broadcasting signal do not indicate the existence of any digital audio broadcasting signal which is to be received in place of the selected digital audio broadcasting signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19)
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15. A method of receiving broadcasting signals comprising the steps of:
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selecting one of digital audio broadcasting signals to receive by a signal selecting and receiving portion so as to obtain program information data and control information data based on the selected digital audio broadcasting signal, detecting a condition in which the selected digital audio broadcasting signal has not been appropriately received by the signal selecting and receiving portion for more than a predetermined period under a situation in which a receiving frequency has been set in the signal selecting and receiving portion for receiving the selected digital audio broadcasting signal, and performing a control operation, when said condition is detected, in such a manner as to cause the signal selecting and receiving portion to select another digital audio broadcasting signal to receive in accordance with indication by the control information data in the case where the control information data obtained based on the selected digital audio broadcasting signal indicate the existence of some other digital audio broadcasting signal which is to be received in place of the selected digital audio broadcasting signal and to cause the signal selecting and receiving portion to change the receiving frequency successively within a predetermined frequency range so as to detect receivable digital audio broadcasting signals one by one and to store in a memory portion control information data obtained based on each receivable digital audio broadcasting signal detected by the signal selecting and receiving portion in the case where the control information data obtained based on the selected digital audio broadcasting signal do not indicate the existence of any digital audio broadcasting signal which is to be received in place of the selected digital audio broadcasting signal.
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20. A method of receiving broadcasting signals comprising the steps of:
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selecting one of digital audio broadcasting signals to receive by a signal selecting and receiving portion so as to obtain program information data and control information data based on the selected digital audio broadcasting signal, detecting a condition in which the selected digital audio broadcasting signal has not been appropriately received by the signal selecting and receiving portion for more than a predetermined period on the strength of the state of the control information data under a situation in which a receiving frequency has been set in the signal selecting and receiving portion for receiving the selected digital audio broadcasting signal, performing a control operation, when said condition is detected, in such a manner as to cause the signal selecting and receiving portion to select another digital audio broadcasting signal to receive in accordance with indication by the control information data in the case where the control information data obtained based on the selected digital audio broadcasting signal indicate the existence of some other digital audio broadcasting signal which is to be received in place of the selected digital audio broadcasting signal and to cause the signal selecting and receiving portion to change the receiving frequency successively within a predetermined frequency range so as to detect receivable digital audio broadcasting signals one by one and to store in a memory portion control information data obtained based on each receivable digital audio broadcasting signal detected by the signal selecting and receiving portion in the case where the control information data obtained based on the selected digital audio broadcasting signal do not indicate the existence of any digital audio broadcasting signal which is to be received in place of the selected digital audio broadcasting signal, causing the signal selecting and receiving portion to select and receive a digital audio broadcasting signal corresponding to selected one of the control information data stored in the memory portion in response to command data supplied from an input portion, and displaying program information data which can be obtained and are represented by the control information data stored in the memory portion.
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Specification