Digital demodulating apparatus, controlling method of the apparatus, computer program product for the apparatus, recording medium recording thereon the product, and digital receiver
First Claim
1. A digital demodulating apparatus comprising:
- a plurality of circuit elements that constitute a tuner that performs channel select processing to a received signal that has been interleaved, and a demodulator that performs demodulation processing to the received signal from the tuner;
a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner; and
a parameter controlling section that changes the value of an operation parameter that regulates an operation of at least one of the plurality of circuit elements, the parameter controlling section determining first and second circuit elements of the plurality of circuit elements, the quantities of changes in first and second operation parameters of the first and second circuit elements, and change timings for the first and second operation parameters of the first and second circuit elements, such that ranges each of which is occupied by errors to be generated in the received signal by changing the quantities of the operation parameters of the first and second circuit elements at the change timings for the first and second operation parameters, do not overlap each other in the received signal deinterleaved by the deinterleaving section, the parameter controlling section then changing the operation parameters of the determined first and second circuit elements by the determined quantities of changes in the first and second operation parameters at the determined change timings for the first and second operation parameters.
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Accused Products
Abstract
A digital demodulating apparatus includes circuit elements constituting a tuner that performs channel select processing to a received signal that has been interleaved, and a demodulator that performs demodulation processing to the received signal from the tuner; a deinterleaving section that performs deinterleaving to the interleaved received signal from the tuner; and a parameter controlling section that changes the value of an operation parameter that regulates an operation of at least one of the circuit elements. The parameter controlling section determines two of the circuit elements, the quantities of changes in operation parameters of the two circuit elements, and change timings for the operation parameters of the two circuit elements, such that ranges each of which is occupied by errors to be generated in the received signal by changing the quantities of the operation parameters of the two circuit elements at the change timings for the operation parameters, do not overlap each other in the deinterleaved received signal. The parameter controlling section changes the operation parameters of the determined two circuit elements by the determined change quantities at the determined change timings.
40 Citations
22 Claims
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1. A digital demodulating apparatus comprising:
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a plurality of circuit elements that constitute a tuner that performs channel select processing to a received signal that has been interleaved, and a demodulator that performs demodulation processing to the received signal from the tuner;
a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner; and
a parameter controlling section that changes the value of an operation parameter that regulates an operation of at least one of the plurality of circuit elements, the parameter controlling section determining first and second circuit elements of the plurality of circuit elements, the quantities of changes in first and second operation parameters of the first and second circuit elements, and change timings for the first and second operation parameters of the first and second circuit elements, such that ranges each of which is occupied by errors to be generated in the received signal by changing the quantities of the operation parameters of the first and second circuit elements at the change timings for the first and second operation parameters, do not overlap each other in the received signal deinterleaved by the deinterleaving section, the parameter controlling section then changing the operation parameters of the determined first and second circuit elements by the determined quantities of changes in the first and second operation parameters at the determined change timings for the first and second operation parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A controlling method of a digital demodulating apparatus comprising a plurality of circuit elements that constitute a tuner that performs channel select processing to a received signal that has been interleaved, and a demodulator that performs demodulation processing to the received signal from the tuner;
- and a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner,
the method comprising;
a determining step of determining first and second circuit elements of the plurality of circuit elements, the quantities of changes in first and second operation parameters of the first and second circuit elements, and change timings for the first and second operation parameters of the first and second circuit elements, such that ranges each of which is occupied by errors to be generated in the received signal by changing the quantities of the operation parameters of the first and second circuit elements at the change timings for the first and second operation parameters, do not overlap each other in the received signal deinterleaved by the deinterleaving section; and
a parameter changing step of changing the operation parameters of the first and second circuit elements determined in the changing step, by the quantities of changes in the first and second operation parameters determined in the changing step, at the change timings for the first and second operation parameters determined in the changing step.
- and a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner,
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20. A computer program product for a digital demodulating apparatus comprising a plurality of circuit elements that constitute a tuner that performs channel select processing to a received signal that has been interleaved, and a demodulator that performs demodulation processing to the received signal from the tuner;
- and a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner,
the product causing the digital demodulating apparatus to execute;
a determining step of determining first and second circuit elements of the plurality of circuit elements, the quantities of changes in first and second operation parameters of the first and second circuit elements, and change timings for the first and second operation parameters of the first and second circuit elements, such that ranges each of which is occupied by errors to be generated in the received signal by changing the quantities of the operation parameters of the first and second circuit elements at the change timings for the first and second operation parameters, do not overlap each other in the received signal deinterleaved by the deinterleaving section; and
a parameter changing step of changing the operation parameters of the first and second circuit elements determined in the changing step, by the quantities of changes in the first and second operation parameters determined in the changing step, at the change timings for the first and second operation parameters determined in the changing step.
- and a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner,
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21. A computer-readable recording medium recording thereon a computer program product for a digital demodulating apparatus comprising a plurality of circuit elements that constitute a tuner that performs channel select processing to a received signal that has been interleaved, and a demodulator that performs demodulation processing to the received signal from the tuner;
- and a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner,
the product causing the digital demodulating apparatus to execute;
a determining step of determining first and second circuit elements of the plurality of circuit elements, the quantities of changes in first and second operation parameters of the first and second circuit elements, and change timings for the first and second operation parameters of the first and second circuit elements, such that ranges each of which is occupied by errors to be generated in the received signal by changing the quantities of the operation parameters of the first and second circuit elements at the change timings for the first and second operation parameters, do not overlap each other in the received signal deinterleaved by the deinterleaving section; and
a parameter changing step of changing the operation parameters of the first and second circuit elements determined in the changing step, by the quantities of changes in the first and second operation parameters determined in the changing step, at the change timings for the first and second operation parameters determined in the changing step.
- and a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner,
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22. A digital receiver comprising a digital demodulating apparatus comprising:
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a plurality of circuit elements that constitute a tuner that performs channel select processing to a received signal that has been interleaved, and a demodulator that performs demodulation processing to the received signal from the tuner;
a deinterleaving section that performs deinterleave processing to the interleaved received signal from the tuner; and
a parameter controlling section that changes the value of an operation parameter that regulates an operation of at least one of the plurality of circuit elements, the parameter controlling section determining first and second circuit elements of the plurality of circuit elements, the quantities of changes in first and second operation parameters of the first and second circuit elements, and change timings for the first and second operation parameters of the first and second circuit elements, such that ranges each of which is occupied by errors to be generated in the received signal by changing the quantities of the operation parameters of the first and second circuit elements at the change timings for the first and second operation parameters, do not overlap each other in the received signal deinterleaved by the deinterleaving section, the parameter controlling section then changing the operation parameters of the determined first and second circuit elements by the determined quantities of changes in the first and second operation parameters at the determined change timings for the first and second operation parameters, 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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Specification