1. A broadcasting signal receiving apparatus, the apparatus comprising:
a tuner unit;
a memory which stores information related to a plurality of physical channel numbers intended to be scanned;
a control unit which performs a channel scan by providing the information related to the physical channel numbers stored in the memory to the tuner unit consecutively in accordance with an input of a prescribed scan instruction, and
a user interface (UI) unit which receives the information related to the plurality of physical channel numbers to be scanned,
wherein the UI unit further comprises a user input unit to which the information related to the plurality of physical channel numbers to be scanned is input by a user, wherein the information related to the plurality of physical channel numbers to be scanned comprises at least one of the physical channel number and the channel frequency, and wherein if the at least one of the physical channel number and the channel frequency is input from the user input unit, the control unit sets the other of the physical channel number and the channel frequency in correspondence with the one of the physical channel number and the channel frequency input, and
wherein a plurality of services are provided via one physical channel, and the plurality of services contained in the physical channel are formed as the channel list.
2. The broadcasting signal receiving apparatus of claim 1, wherein the control unit causes the memory to store the information related to the plurality of physical channel numbers.
3. The broadcasting signal receiving apparatus of claim 2, wherein the UI unit comprises a UI generating unit which generates a UI menu for inputting the plurality of physical channel numbers to be scanned and a channel frequency corresponding to a physical channel number of the plurality of physical channel numbers.
4. The broadcasting signal receiving apparatus of claim 3, wherein the control unit automatically sets the other of the physical channel number and the channel frequency in correspondence with the one of the physical channel number and the channel frequency input.
5. The broadcasting signal receiving apparatus of claim 3, wherein the UI menu further comprises an item for inputting a frequency band.
6. A channel scanning method comprising:
inputting information related to a plurality of physical channel numbers to be scanned;
setting the information related to the plurality of physical channel numbers as a list to be scanned;
inputting a channel scan instruction; and
performing the channel scan consecutively in accordance with the information on the physical channel numbers of the list to be scanned,
wherein the inputting of the information related to the plurality of physical channel numbers comprises inputting one of a physical channel number of the plurality of physical channel numbers to be scanned and a channel frequency corresponding to the physical channel number, and
automatically setting the other of the physical channel number and the channel frequency in correspondance with the one of the physical channel number and the channel frequency,
wherein a plurality of services are provided via one physical channel, and the plurality of services contained in the physical channel are formed as the channel list.
7. The channel scanning method of claim 6 wherein the inputting the information related to a plurality of physical channel numbers comprises generating a UI menu for inputting the physical channel number and the channel frequency corresponding to the physical channel number.
8. The channel scanning method of claim 6, wherein the UI menu further comprises an item for inputting a frequency band.
9. The channel scanning method of claim 6, wherein the inputting of information related to the plurality of physical channel numbers comprises setting the other of the physical channel number and the channel frequency in correspondence with the one of the physical channel number and the channel frequency.
10. The channel scanning method of claim 7, wherein the inputting information related to the plurality of physical channel numbers comprises setting the other of the physical channel number and the channel frequency in correspondence with the one of the physical channel number and the channel frequency.
11. A non-transitory computer-readable recording medium having embodied thereon computer executable instructions for executing a channel scanning method, the method comprising:
inputting information related to a plurality of physical channel numbers to be scanned;
setting the information related to the plurality of physical channel numbers as a list to be scanned;
inputting a channel scan instruction; and
performing the channel scan consecutively in accordance with the information on the physical channel numbers of the list to be scanned,
wherein the inputting of the information related to the plurality of physical channel numbers comprises inputting one of a physical channel number of the plurality of physical channel numbers to be scanned and a channel frequency corresponding to the physical channel number, and
automatically setting the other of the physical channel number and the channel frequency in correspondance with the one of the physical channel number and the channel frequency,
wherein a plurality of services are provided via one physical channel, and the plurality of services contained in the physical channel are formed as the channel list.
12. The broadcasting signal receiving apparatus of claim 1, wherein the physical channel number is a multiplexer number.
13. The broadcasting signal receiving apparatus of claim 1, wherein the physical channel numbers are associated with a frequency band.
14. A broadcasting signal receiving apparatus, the apparatus comprising:
a tuner unit;
a memory which stores information related to a plurality of physical channel numbers intended to be scanned;
a control unit which performs a channel scan by providing the information related to the physical channel numbers stored in the memory to the tuner unit consecutively in accordance with an input of a prescribed scan instructions, and
a user interface (UI) unit receives the information related to the plurality of physical channel numbers to be scanned,
wherein the UI unit further comprises a user input unit to which the information related to the plurality of physical channel numbers to be scanned is input by a user, and
wherein a plurality of services are provided via one physical channel, the channel scan is performed on at least one of a plurality of physical channels corresponding to the information input by a user, and at least a part of the plurality of services contained in the at least one physical channel, which can be currently received, are formed as a channel list.
15. A channel scanning method comprising:
inputting information related to a plurality of physical channel numbers to be scanned;
setting the information related to the plurality of physical channel numbers as a list to be scanned;
inputting a channel scan instruction; and
performing the channel scan consecutively in accordance with the information on the physical channel numbers of the list to be scanned,
wherein a plurality of services are provided via one physical channel, the channel scan is performed on at least one of a plurality of physical channels corresponding to the information input by a user, and at least a part of the plurality of services contained in the at least one physical channel, which can be currently received, are formed as a channel list.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for operating an active noise reduction system comprising:
providing filter coefficients for an adaptive filter in response to a noise signal;
determining leakage factors;
smoothing the leakage factors to provide smoothed leakage factors;
applying the smoothed leakage factors to the filter coefficients to provide modified filter coefficients; and
applying the filter coefficients to an audio signal;
wherein the determining comprises determining a leakage factor as a function of the frequency of an input reference signal.
2. A method in accordance with claim 1, wherein the applying comprises multiplying an old filter coefficient value and a filter coefficient update amount by the smoothed leakage factors.
3. An active noise reduction system comprising:
an adaptive filter, for providing an active noise reduction signal;
a coefficient calculator, for providing filter coefficients for the adaptive filter;
a leakage adjuster comprising a data smoother to provide smoothed leakage factors to apply to the filter coefficients, and further comprising circuitry to determine leakage factors as a function of the frequency of an input reference signal and to provide the leakage factors to the data smoother; and
circuitry for applying the coefficients to an audio signal.
4. A method for operating an active noise reduction system comprising:
providing filter coefficients of an adaptive filter in response to a noise signal;
determining leakage factors associated with the filter coefficients, wherein the determining comprises
in response to a first triggering condition, providing a first leakage factor;
in response to a second triggering condition, providing a second leakage factor, different from the first leakage factor; and
in the absence of the first triggering condition and the second triggering condition, providing a default leakage factor; and
applying the filter coefficients to an audio signal;
wherein at least one of the providing the first leakage factor, providing the second leakage factor, and providing the default leakage factor comprises determining the leakage factor value as a function of the frequency of a reference input signal.
5. A method comprising:
determining a leakage factor for use in an adaptive filter of a noise reduction system as a function of the frequency of an input reference signal;
applying the leakage factor to coefficients of the adaptive filter; and
applying the coefficients to an audio signal.
6. A method in accordance with claim 5, further comprising applying the leakage factor to a filter coefficient update amount.
7. A method in accordance with claim 5, wherein the method is incorporated in the operation of an active noise reduction system.
8. A method in accordance with claim 7, wherein the method is incorporated in the operation of an active noise reduction system in a vehicle.
9. A method in accordance with claim 5, wherein the applying the leakage factor comprises combining the adaptive filter coefficient value and the coefficient value update amount prior to the applying the leakage factor.
10. A method in accordance with claim 5, wherein the applying the leakage factor comprises:
applying the leakage factor to the adaptive filter coefficient value to provide a modified adaptive filter coefficient value;
applying the leakage factor to the coefficient value update amount to provide a modified coefficient value update amount; and
combining the modified adaptive filter coefficient value and the modified coefficient value update.