Digital demodulating apparatus, digital receiver, controlling method of the apparatus, computer program product for the apparatus, and recording medium recording thereon the product
First Claim
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1. A digital demodulating apparatus comprising:
- a tuner that performs channel select processing to a received signal;
a demodulator that performs demodulation processing to the received signal from the tuner;
a controller that controls the tuner and the demodulator;
a signal status forecasting section that, when a predetermined control is to be performed by the controller, forecasts a change in signal status attributed to the predetermined control prior to the controller performing the predetermined control, based on a type of the predetermined control; and
an operation controlling section that, when the signal status forecasting section has forecasted that the signal status is to be worsened to a predetermined status due to the predetermined control, controls demodulation processing of at least one of a plurality of circuit elements that constitute the demodulator, such that a performance of the demodulation processing decreases in processing a portion of the received signal in which the signal status has been forecast as worsened.
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Abstract
A digital demodulating apparatus is provided capable of more reducing the power consumption of a demodulator by decreasing the performance of demodulation processing to a portion of a signal in which the signal condition is forecasted to be worsened. In the apparatus, when a signal status forecasting section has forecasted that the status of the received signal is worsened to a predetermined status due to a predetermined control of a controller, a demodulation controller controls an operation of at least one of circuit elements constituting the demodulator such that the performance of the operation decreases, in processing the portion where the signal status is worsened.
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Citations
18 Claims
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1. A digital demodulating apparatus comprising:
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a tuner that performs channel select processing to a received signal; a demodulator that performs demodulation processing to the received signal from the tuner; a controller that controls the tuner and the demodulator; a signal status forecasting section that, when a predetermined control is to be performed by the controller, forecasts a change in signal status attributed to the predetermined control prior to the controller performing the predetermined control, based on a type of the predetermined control; and an operation controlling section that, when the signal status forecasting section has forecasted that the signal status is to be worsened to a predetermined status due to the predetermined control, controls demodulation processing of at least one of a plurality of circuit elements that constitute the demodulator, such that a performance of the demodulation processing decreases in processing a portion of the received signal in which the signal status has been forecast as worsened. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A digital receiver comprising a digital demodulating apparatus comprising:
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a tuner that performs channel select processing to a received signal; a demodulator that performs demodulation processing to the received signal from the tuner; a controller that controls the tuner and the demodulator; a signal status forecasting section that, when a predetermined control is to be performed by the controller, forecasts a change in signal status attributed to the predetermined control prior to the controller performing the predetermined control, based on a type of the predetermined control; and an operation controlling section that, when the signal status forecasting section has forecasted that the signal status is to be worsened to a predetermined status due to the predetermined control, controls demodulation processing of at least one of a plurality of circuit elements that constitute the demodulator, such that a performance of the demodulation processing decreases in processing a portion of the received signal in which the signal status has been forecast as worsened, the receiver performing reproduction processing for at least one of character data, image data, audio data, and program data, on the basis of the received signal demodulated by the digital demodulating apparatus.
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16. A digital receiver comprising a digital demodulating apparatus comprising a tuner that performs channel select processing to a received signal, and a demodulator that performs demodulation processing to the received signal from the tuner,
the receiver further comprising: -
a controller that controls the whole of the receiver including the digital demodulating apparatus, a signal status forecasting section that, when a predetermined control is to be performed by the controller, forecasts a change in signal status attributed to the predetermined control prior to the controller performing the predetermined control, based on a type of the predetermined control; and an operation controlling section that, when the signal status forecasting section has forecasted that the signal status is to be worsened to a predetermined status due to the predetermined control, controls demodulation processing of at least one of a plurality of circuit elements that constitute the demodulator, such that a performance of the demodulation processing decreases in processing a portion of the received signal in which the signal status has been forecast as worsened.
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17. A controlling method of a digital demodulating apparatus comprising a tuner that performs channel select processing to a received signal;
- a demodulator that performs demodulation processing to the received signal from the tuner; and
a controller that controls the tuner and the demodulator,the method comprising; a signal status forecasting step of, when a predetermined control is to be performed by the controller, a processor forecasting a change in signal status attributed to the predetermined control prior to the controller performing the predetermined control, based on a type of the predetermined control; and an operation controlling step of, when it was forecasted in the signal status forecasting step that the signal status is worsened to a predetermined status due to the predetermined control, controlling demodulation processing of at least one of a plurality of circuit elements that constitute the demodulator, such that a performance of the demodulation processing decreases in processing a portion of the received signal in which the signal status has been forecast as worsened.
- a demodulator that performs demodulation processing to the received signal from the tuner; and
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18. A non-transitory computer-readable medium having instructions stored thereon for a digital demodulating apparatus comprising a tuner that performs channel select processing to a received signal;
- a demodulator that performs demodulation processing to the received signal from the tuner; and
a controller that controls the tuner and the demodulator, wherein when the instructions are read and executed by a processor, the processor is configured to perform the steps of;a signal status forecasting step of, when a predetermined control is to be performed by the controller, forecasting a change in signal status attributed to the predetermined control prior to the controller performing the predetermined control, based on a type of the predetermined control; and an operation controlling step of, when it was forecasted in the signal status forecasting step that the signal status is to be worsened to a predetermined status due to the predetermined control, controlling demodulation processing of at least one of a plurality of circuit elements that constitute the demodulator, such that a performance of the demodulation processing decreases in processing a portion of the received signal in which the signal status has been forecast as worsened.
- a demodulator that performs demodulation processing to the received signal from the tuner; and
Specification