KR20130039180A - Television receiver and method for rejecting interference in television receiver - Google Patents

Television receiver and method for rejecting interference in television receiver Download PDF

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Publication number
KR20130039180A
KR20130039180A KR1020110103679A KR20110103679A KR20130039180A KR 20130039180 A KR20130039180 A KR 20130039180A KR 1020110103679 A KR1020110103679 A KR 1020110103679A KR 20110103679 A KR20110103679 A KR 20110103679A KR 20130039180 A KR20130039180 A KR 20130039180A
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KR
South Korea
Prior art keywords
oscillation frequency
oscillation
frequency
default
television receiver
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Application number
KR1020110103679A
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Korean (ko)
Inventor
류태규
Original Assignee
삼성전기주식회사
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Application filed by 삼성전기주식회사 filed Critical 삼성전기주식회사
Priority to KR1020110103679A priority Critical patent/KR20130039180A/en
Publication of KR20130039180A publication Critical patent/KR20130039180A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/50—Tuning indicators; Automatic tuning control

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)

Abstract

The present invention relates to a television receiver and a method for eliminating interference of a television receiver. According to an embodiment of the present invention, a television receiver performs tuning using a lower or upper oscillation frequency preset by default, and A tuner of the oscillation frequency to change the oscillation frequency preset by the oscillation change control to the upper or lower oscillation frequency by default; And controlling tuning using the lower or upper oscillation frequency preset as the default based on the tuning channel information, and determining whether the Wi-Fi signal overlaps with the oscillating harmonic frequency based on the previously provided Wi-Fi channel information, and in the case of overlap The tuner may include a control unit configured to control the oscillation change in the tuner for changing the oscillation frequency preset by the upper or lower oscillation frequency.

Description

TELEVISION RECEIVER AND METHOD FOR REJECTING INTERFERENCE IN TELEVISION RECEIVER}

The present invention relates to a television receiver and a method for eliminating interference of a television receiver capable of eliminating interference between a WiFi signal and a television signal.

In general, as smart devices such as smart phones and smart TVs are becoming more common, the use of WiFi using 2.4GHz or 5GHz is rapidly increasing in the home.

However, according to the rapid spread of smart devices, when a WiFi signal is present in an environment where a television is used, when the oscillation frequency and the WiFi signal inside the television are mixed, the WiFi signal may be received by the television (TV). Therefore, there is a problem that the WiFi signal causes interference in the television.

In particular, in severe cases, there is a problem that causes the reception of the television.

As described above, in the conventional television receiver, since there is no exclusion function for the WiFi signal, the WiFI signal is mixed with harmonics of the oscillation frequency of the tuner, thereby adversely affecting the IF band of the tuner.

On the other hand, in some conventional tuners, a filter is added to the RF stage to exclude the WiFi signal. However, since an additional filter circuit is required, a certain amount of in-band loss of the TV occurs, resulting in a noise figure (NF). ), There is a problem that causes deterioration.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems of the prior art, and provides a television receiver and a method of eliminating interference of a television receiver capable of eliminating interference between a WiFi signal and a television signal.

The first technical aspect of the present invention,

A tuner of the oscillation frequency of the oscillation frequency performing tuning using a lower or upper oscillation frequency preset by default and changing the oscillation frequency set to a higher or lower oscillation frequency by default according to the oscillation change control for interference exclusion; And

Control tuning using the lower or upper oscillation frequency preset as the default based on the tuning channel information, and determine whether the Wi-Fi signal overlaps with the oscillation harmonic frequency based on the previously provided Wi-Fi channel information. A television receiver is proposed which includes a control unit for controlling the oscillation change in the tuner to change a preset oscillation frequency into an upper or lower oscillation frequency by default.

In the first technical aspect of the present invention, the controller may be configured to determine whether the Wi-Fi signal overlaps with the third oscillation harmonic 3 * Fosc, which is the third harmonic of the oscillation signal, based on the Wi-Fi channel information. .

The controller may be configured to control a change to a lower oscillation frequency when the oscillation frequency is set as the default oscillation frequency in the case of overlap.

The controller may be configured to control a change to an upper oscillation frequency when the oscillation frequency preset by the default is the lower oscillation frequency in case of overlap.

In addition, the second technical aspect of the present invention,

A first input step of receiving tuning channel information;

A setting step of setting an oscillation frequency as a default using a lower or upper oscillation frequency preset as a default;

A second input step of receiving Wi-Fi channel information;

A determination step of determining whether the Wi-Fi signal and the oscillation harmonic frequency overlap with each other based on the Wi-Fi channel information;

A change step of changing the oscillation frequency preset by the default to an upper or lower oscillation frequency in case of overlap; And

A method of eliminating interference of a television receiver including a tuning step of controlling tuning of a tuner using a predetermined lower or upper oscillation frequency is proposed.

In the second technical aspect of the present invention, the determining may be performed to determine whether or not the Wi-Fi signal overlaps with the third oscillation harmonic, which is the third harmonic of the oscillation signal, based on the Wi-Fi channel information.

The changing step may be configured to control a change to a lower oscillation frequency when the oscillation frequency preset as the default oscillation frequency is an overlap.

The changing step may be configured to control a change to an upper oscillation frequency when the oscillation frequency preset as the lower oscillation frequency is the default in case of overlap.

According to the present invention, when the overlap between the WiFi signal and the oscillation harmonic frequency is determined by overlapping, by default, by changing the lower or upper oscillation frequency preset to the upper or lower oscillation frequency, interference between the WiFi signal and the television signal There is an effect that can be excluded.

1 is a block diagram of a television receiver according to a first embodiment of the present invention.
2 is a flowchart showing a method for eliminating interference of a television receiver according to a second embodiment of the present invention.
3 is an explanatory diagram of frequency interference in the case of an upper oscillation frequency.
4 is an explanatory diagram of frequency interference elimination in the case of a lower oscillation frequency.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

The present invention is not limited to the embodiments described, and the embodiments of the present invention are used to assist in understanding the technical spirit of the present invention. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

1 is a block diagram of a television receiver according to a first embodiment of the present invention.

Referring to FIG. 1, the television receiver according to the first embodiment of the present invention performs tuning by using a lower or upper oscillation frequency preset by default, and sets a preset oscillation by default according to an oscillation change control for interference exclusion. Based on the tuner 110 of the oscillation frequency to change the frequency to the upper or lower oscillation frequency and the tuning using the lower or upper oscillation frequency preset by default based on the tuning channel information ICH, the Wi-Fi received in advance (WiFi) It is determined whether the Wi-Fi signal and the oscillation harmonic frequency overlap with each other based on the channel information (IWiFi), and in the case of overlap, the tuner 100 for changing the oscillation frequency preset by the default to the upper or lower oscillation frequency. ) May include a controller 110 for controlling the oscillation change.

In detail, the controller 110 first controls tuning based on the default lower or upper oscillation frequency based on the tuning channel information ICH. Here, the lower oscillation frequency means an oscillation frequency lower than the desired channel frequency in the RF signal, and the upper oscillation frequency means an oscillation frequency higher than the desired channel frequency in the RF signal.

Thereafter, the controller 110 determines whether the Wi-Fi signal and the oscillation harmonic frequency overlap with each other, based on the Wi-Fi channel information (IWiFi) provided in advance, and in case of overlap, the oscillation frequency preset as the default or higher. The oscillation change is controlled in the tuner 100 to change to a lower oscillation frequency.

Accordingly, the tuner 110 performs tuning using the lower or upper oscillation frequency preset by default under the control of the controller 120, and then oscillation change control for the exclusion of the interference of the controller 120. In accordance with this, the oscillation frequency, which is preset by default, is changed to the upper or lower oscillation frequency.

More specifically, the controller 110 may determine whether the Wi-Fi signal overlaps with the third oscillation harmonic (3 * Fosc), which is the third harmonic of the oscillation signal, based on the Wi-Fi channel information (IWiFi). .

That is, when the Wi-Fi frequency is 2425 MHz in the Wi-Fi channel information (IWiFi) and the frequency Fosc of the oscillation signal is 810 MHz for selecting a desired channel in the tuning channel information (ICH), the third oscillation harmonic (3 * Fosc) Becomes 2430 MHz, at this time, when the Wi-Fi frequency and the 3rd oscillation harmonic (3 * Fosc) are mixed with each other, the same frequency as the intermediate frequency is generated, and thus the Wi-Fi frequency and the 3rd oscillation harmonic (3 * Fosc) interfere with each other. Will be raised.

As described above, when the Wi-Fi frequency and the 3rd oscillation harmonics 3 * Fosc interfere with each other, the oscillation frequency can be changed to eliminate the interference.

For example, the controller 110 may control the change to the lower oscillation frequency lower than the frequency of the desired channel of the RF signal if the oscillation frequency preset as the default is the upper oscillation frequency higher than the frequency of the desired channel of the RF signal. Can be.

As another example, the controller 110 may control a change to an upper oscillation frequency higher than a frequency of a desired channel of the RF signal if the oscillation frequency preset as the default is a lower oscillation frequency lower than a frequency of the desired channel of the RF signal. Can be.

As such, when the oscillation frequency is the upper oscillation frequency, the oscillation frequency is changed to the lower oscillation frequency, and when the oscillation frequency is the lower oscillation frequency, the oscillation frequency is changed to the upper oscillation frequency, thereby eliminating the interference between the Wi-Fi frequency and the oscillation frequency.

Specifically, as described above, when the oscillation frequency preset as the default is the upper oscillation frequency (810 MHz), when the oscillation frequency is changed to the lower oscillation frequency (800 MHz) in order to exclude interference, the third oscillation harmonic (3) is used. * Fosc) becomes 2400MHz, so if the Wi-Fi frequency and the 3rd oscillation harmonic (3 * Fosc) are mixed with each other, the intermediate frequency (5MHz) and the other frequency (2425MHz (FWiFi) -2400MHz (3 * Fosc) = 25MHz) As a result, the Wi-Fi frequency and the third oscillation harmonic (3 * Fosc) do not interfere with each other.

2 is a flowchart illustrating a method for excluding interference of a television receiver according to a second embodiment of the present invention.

Referring to FIG. 2, the interference rejection method of the television receiver according to the second embodiment of the present invention includes a first input step S210 for receiving tuning channel information ICH and a lower or upper oscillation preset by default. A setting step (S220) of setting an oscillation frequency as a default using a frequency, a second input step (S230) of receiving Wi-Fi channel information (IWiFi), and the Wi-Fi (WiFi) channel information (IWiFi) A determination step (S240) of determining whether the Wi-Fi signal and the oscillation harmonic frequency overlap with each other, a change step (S250) of changing the preset oscillation frequency to an upper or lower oscillation frequency by default in the case of an overlap; It may include a tuning step (S260) for controlling the tuning of the tuner using a predetermined lower or upper oscillation frequency.

In detail, in the first input step S210, the tuning channel information ICH is received. In this case, the tuning channel information ICH includes frequency information of a desired channel.

In the setting step (S220), the oscillation frequency is set as a default using a lower or upper oscillation frequency preset as a default. Here, the oscillation frequency may be set to a lower frequency lower than the frequency of the desired channel of the RF signal, and alternatively, the oscillation frequency may be set to an upper frequency higher than the frequency of the desired channel of the RF signal.

In the second input step S230, Wi-Fi channel information IWiFi is received. Here, the Wi-Fi channel information IWiFi includes specific frequency information regarding whether the Wi-Fi frequency is 2.4 GHz or 5 GHz.

Next, in the determination step (S240), based on the Wi-Fi (WiFi) channel information (IWiFi) it is determined whether the Wi-Fi signal and the oscillation harmonic frequency overlap.

Next, in the change step (S250), in the case of overlap, the oscillation frequency preset by the default is changed to the upper or lower oscillation frequency.

In the tuning step (S260), the tuning of the tuner using a predetermined lower or upper oscillation frequency is controlled.

More specifically, in the determining step S240, based on the Wi-Fi channel information IWiFi, it may be determined whether the Wi-Fi signal overlaps with the third oscillation harmonic 3 * Fosc, which is the third harmonic of the oscillation signal. have.

As described above, when the Wi-Fi frequency and the 3rd oscillation harmonics 3 * Fosc interfere with each other, the oscillation frequency can be changed to eliminate the interference.

For example, the change step (S250), when the overlap in the case of the default oscillation frequency can be controlled to change to the lower oscillation frequency if the upper oscillation frequency.

In contrast, the change step (S250), if the overlap in the case of the default oscillation frequency preset lower oscillation frequency can be controlled to change to the upper oscillation frequency.

As such, when the oscillation frequency is the upper oscillation frequency, the oscillation frequency is changed to the lower oscillation frequency, and when the oscillation frequency is the lower oscillation frequency, the oscillation frequency is changed to the upper oscillation frequency, thereby eliminating the interference between the Wi-Fi frequency and the oscillation frequency.

3 is an explanatory diagram of frequency interference in the case of an upper oscillation frequency, and FIG. 4 is an explanatory diagram of frequency interference elimination in the case of a lower oscillation frequency.

Referring to FIG. 3, when the Wi-Fi frequency FWiFi is 2425 MHz in the Wi-Fi channel information IWiFi, and the frequency Fosc of the oscillation signal is 810 MHz in order to select a desired channel in the tuning channel information ICH, 3 Since the second oscillation harmonic (3 * Fosc) becomes 2430 MHz, when the Wi-Fi frequency and the third oscillation harmonic (3 * Fosc) are mixed with each other, the same frequency as the intermediate frequency (5 MHz) is equal to (2430 MHz (3 * Fosc) -2425 MHz ( FWiFi) = 5MHz), which causes the Wi-Fi frequency and the third oscillation harmonic (3 * Fosc) to interfere with each other.

Referring to FIG. 4, as described above, when the oscillation frequency set as the default is the upper oscillation frequency (810 MHz), when the oscillation frequency is changed to the lower oscillation frequency (800 MHz) in order to exclude interference, the third oscillation harmonic Since (3 * Fosc) becomes 2400MHz, when the Wi-Fi frequency and the 3rd oscillation harmonic (3 * Fosc) are mixed with each other, the intermediate frequency (5MHz) and the other frequency (2425MHz (FWiFi) -2400MHz (3 * Fosc) = 25 MHz), so that the Wi-Fi frequency and the third oscillation harmonic (3 * Fosc) do not interfere with each other.

100: television receiver
110: control unit
120: tuner

Claims (8)

A tuner of the oscillation frequency of the oscillation frequency performing tuning using a lower or upper oscillation frequency preset by default and changing the oscillation frequency set to a higher or lower oscillation frequency by default according to the oscillation change control for interference exclusion; And
Control tuning using the lower or upper oscillation frequency preset as the default based on the tuning channel information, and determine whether the Wi-Fi signal overlaps with the oscillation harmonic frequency based on the previously provided Wi-Fi channel information. Control unit for controlling the oscillation change in the tuner to change the oscillation frequency set in advance to the upper or lower oscillation frequency by default.
Television receiver comprising a. The apparatus of claim 1,
And a TV receiver determining whether the Wi-Fi signal overlaps with a third oscillation harmonic (3 * Fosc), which is the third harmonic of the oscillation signal, based on the Wi-Fi channel information. 3. The apparatus of claim 2,
And a television receiver for controlling a change to a lower oscillation frequency if the oscillation frequency preset as the upper oscillation frequency is an overlap. 3. The apparatus of claim 2,
And a television receiver for controlling a change to an upper oscillation frequency if the oscillation frequency set as the default is the lower oscillation frequency. A first input step of receiving tuning channel information;
A setting step of setting an oscillation frequency as a default using a lower or upper oscillation frequency preset as a default;
A second input step of receiving Wi-Fi channel information;
A determination step of determining whether the Wi-Fi signal and the oscillation harmonic frequency overlap with each other based on the Wi-Fi channel information;
A change step of changing the oscillation frequency preset by the default to an upper or lower oscillation frequency in case of overlap; And
Tuning step for controlling tuning of the tuner using a predetermined lower or upper oscillation frequency
Interference elimination method of the television receiver comprising a. The method of claim 5, wherein the determining step,
And a method of eliminating interference between a Wi-Fi signal and a third oscillation harmonic, which is a third harmonic of the oscillation signal, based on the Wi-Fi channel information. The method of claim 6, wherein the changing step,
If the overlap is the default oscillation frequency preset by the upper oscillation frequency if the interference control method of the television receiver to control the change to the lower oscillation frequency. The method of claim 6, wherein the changing step,
If the overlap is the default oscillation frequency preset by the lower oscillation frequency if the interference control method of the television receiver to control the change to the upper oscillation frequency.
KR1020110103679A 2011-10-11 2011-10-11 Television receiver and method for rejecting interference in television receiver KR20130039180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110103679A KR20130039180A (en) 2011-10-11 2011-10-11 Television receiver and method for rejecting interference in television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110103679A KR20130039180A (en) 2011-10-11 2011-10-11 Television receiver and method for rejecting interference in television receiver

Publications (1)

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KR20130039180A true KR20130039180A (en) 2013-04-19

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KR1020110103679A KR20130039180A (en) 2011-10-11 2011-10-11 Television receiver and method for rejecting interference in television receiver

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