KR20080020782A - Apparatus and method for optimizating frequency tuning of digital tuner - Google Patents

Apparatus and method for optimizating frequency tuning of digital tuner Download PDF

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KR20080020782A
KR20080020782A KR1020060084072A KR20060084072A KR20080020782A KR 20080020782 A KR20080020782 A KR 20080020782A KR 1020060084072 A KR1020060084072 A KR 1020060084072A KR 20060084072 A KR20060084072 A KR 20060084072A KR 20080020782 A KR20080020782 A KR 20080020782A
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frequency
tuned
channel
channel frequency
broadcast channel
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KR1020060084072A
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Korean (ko)
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이흥규
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엘지이노텍 주식회사
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Publication of KR20080020782A publication Critical patent/KR20080020782A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
    • H04B2001/1045—Adjacent-channel interference

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  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Noise Elimination (AREA)

Abstract

An apparatus and a method for optimizing frequency tuning of a digital tuner are provided to tune a broadcast channel, which is selected from among a tuned broadcast channel higher by one level and a tuned broadcast channel lower by one level than a selected broadcast channel and is not interfered with an interference frequency of an adjacent channel, as a selected broadcast channel. A digital tuner(11) performs tuning with a broadcast channel frequency selected from a received digital broadcast channel. A controller(13) tunes a channel frequency higher by one level and a channel frequency lower by one level than the broadcast channel frequency selected through the digital tuner(11), and tunes a channel frequency which is less interfered by an interference frequency of an adjacent channel, among the tuned channel frequencies, with the selected broadcast channel frequency. A memory(14) stores the channel frequency which is less interfered by the interference frequency of the adjacent channel.

Description

디지털 튜너의 주파수 튜닝 최적화 장치 및 방법{APPARATUS AND METHOD FOR OPTIMIZATING FREQUENCY TUNING OF DIGITAL TUNER}Apparatus and method for optimizing frequency tuning of digital tuner {APPARATUS AND METHOD FOR OPTIMIZATING FREQUENCY TUNING OF DIGITAL TUNER}

도 1은 본 발명의 일실시예에 따른 주파수튜닝 최적화 장치의 제어 블럭도1 is a control block diagram of a frequency tuning optimization apparatus according to an embodiment of the present invention.

도 2는 본 발명의 일실시예에 따라 디지털 튜너의 주파수 튜닝을 최적화하는 방법에 대한 플로우챠트2 is a flowchart of a method for optimizing frequency tuning of a digital tuner according to an embodiment of the present invention.

도 3은 본 발명의 일실시예에 따른 디지털 튜너의 주파수 튜닝 최적화 파형도3 is a frequency tuning optimization waveform diagram of a digital tuner according to an embodiment of the present invention.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

11; 디지털 튜너 12; 복조집적회로11; Digital tuner 12; Demodulation integrated circuit

13; 제어부 14; 메모리13; A controller 14; Memory

본 발명은 디지털 튜너의 주파수 튜닝 최적화 장치 및 방법에 관한 것이다.The present invention relates to an apparatus and method for optimizing frequency tuning of a digital tuner.

일반적으로, 디지털 튜너는 디지털 위성방송을 위성 중계국을 거치지 않고 직접 수신기로 수신할 수 있는 수신용 튜너로서, 상기 디지털 튜너는 디지털 위성방송수신기에 내장되어 안테나에서 수신된 여러 전파 중 특정 채널주파수만을 선택 해 주게 되며, 상기 디지털 튜너는 선택된 채널 주파수에 대하여 혼신이 없는 양질의 주파수를 수신하기 위하여 튜닝할 때, 원하는 채널에 맞는 주파수만을 튜닝하고 그 주변에 원하는 채널에 영향을 주는 인접 채널을 전혀 고려하고 않고 튜닝하도록 되어 있다.In general, a digital tuner is a reception tuner capable of receiving a digital satellite broadcast directly to a receiver without passing through a satellite relay station. The digital tuner is built in a digital satellite broadcast receiver and selects only a specific channel frequency among various radio waves received from an antenna. When the digital tuner tunes to receive a good frequency without interference on the selected channel frequency, only the frequency corresponding to the desired channel is tuned and the adjacent channel affecting the desired channel is considered at all. It is designed to tune without.

그래서 상기 원하는 채널주파수에 대하여 인접 채널에 강전계 신호가 있을 경우, 상기 디지털 튜너는 주파수 튜닝시, 인접 채널의 강전계 신호를 RF AGC 검출회로를 통해서 고주파신호의 이득을 조정함으로써, 인접 채널의 간섭을 방지하거나, 또는 트랩회로를 이용하여 인접 채널의 강전계 신호를 제거하게 되었다.Thus, when there is a strong field signal in the adjacent channel for the desired channel frequency, the digital tuner adjusts the gain of the high frequency signal through the RF AGC detection circuit to the strong field signal of the adjacent channel during frequency tuning, thereby causing interference of the adjacent channel. Or by using a trap circuit to eliminate the strong field signal of the adjacent channel.

이와 같이 상기 디지털 튜너는 주파수 튜닝시 인접 채널의 방해주파수 간섭을 하드웨어에 의존하여 개선하도록 되어 상기 디지털 튜너의 성능은 하드웨어에만 의존하는 문제점이 있다. As described above, the digital tuner improves interference frequency interference of adjacent channels depending on hardware in frequency tuning, so that the performance of the digital tuner depends only on hardware.

본 발명은 디지털 튜너의 주파수 튜닝시 인접채널에 대한 방해를 최소화한다.The present invention minimizes interference to adjacent channels during frequency tuning of the digital tuner.

본 발명의 디지털 튜너의 주파수 튜닝 최적화 장치는 수신되는 디지털 방송 채널주파수를 채널주파수로 튜닝하는 디지털 튜너와; 상기 디지털 튜너를 통해서 선국된 방송 채널주파수보다 한 단계 높은 채널주파수와 한 단계 낮은 주파수를 튜닝하여 상기 튜닝 된 채널주파수 중 인접채널의 방해주파수에 간섭이 적은 채널주파수를 상기 선국된 방송 채널주파수로 튜닝하는 제어부를 포함한다. An apparatus for optimizing frequency tuning of a digital tuner of the present invention includes: a digital tuner for tuning a received digital broadcasting channel frequency to a channel frequency; Tuning the channel frequency one step higher and the one step lower than the broadcast channel frequency tuned through the digital tuner to tune the channel frequency having less interference to the interference frequency of the adjacent channel among the tuned channel frequencies to the tuned broadcast channel frequency. It includes a control unit.

또한 본 발명의 디지털 튜너의 주파수 튜닝 최적화 방법은 방송 채널주파수 를 선국하는 단계와; 상기 선국된 방송 채널주파수에 대하여 한 단계 높은 방송 채널 주파수와 한 단계 낮은 방송 채널 주파수를 튜닝하는 단계와; 상기 튜닝된 한 단계 높은 방송 채널주파수와 상기 한 단계 낮은 방송채널 주파수 중 인접 채널의 방해주파수에 간섭이 적은 튜닝된 방송 채널 주파수를 상기 선국된 방송 채널주파수로 튜닝하는 단계를 포함한다.In addition, the frequency tuning optimization method of the digital tuner of the present invention comprises the steps of tuning the broadcast channel frequency; Tuning a higher broadcast channel frequency and a lower broadcast channel frequency with respect to the tuned broadcast channel frequency; And tuning the tuned broadcast channel frequency having less interference to the interference frequency of the adjacent channel among the tuned one higher broadcast channel frequency and the one lower broadcast channel frequency to the tuned broadcast channel frequency.

이하 첨부되는 도면에 의거 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 일실시예에 따른 주파수 튜닝 최적화 장치의 제어 블럭도이고, 도 2는 본 발명의 일실시예에 따라 디지털 튜너의 주파수 튜닝을 최적화하는 방법에 대한 플로우챠트 이며, 도 3은 본 발명의 일실시예에 따른 디지털 튜너의 주파수 튜닝 최적화 파형도 이다.1 is a control block diagram of a frequency tuning optimization apparatus according to an embodiment of the present invention, FIG. 2 is a flowchart of a method for optimizing frequency tuning of a digital tuner according to an embodiment of the present invention, and FIG. Figure 10 is a frequency tuning optimization waveform diagram of a digital tuner according to an embodiment of the present invention.

디지털 튜너(11)는 수신되는 디지털 방송 채널주파수에서 선국된 방송 채널 에 해당하는 채널주파수로 튜닝하여 출력하게 된다.The digital tuner 11 tunes to a channel frequency corresponding to a broadcast channel tuned from the received digital broadcast channel frequency and outputs the tuned channel.

복조집적회로(12)는 상기 디지털 튜너(11)에서 튜닝되어 출력되는 채널주파수를 원래의 방송신호로 복조하여 출력하게 된다.The demodulation integrated circuit 12 demodulates and outputs the channel frequency tuned and output by the digital tuner 11 into an original broadcast signal.

제어부(13)는 상기 디지털 튜너(11)에 원하는 방송 채널주파수를 선국하고, 상기 선국된 방송 채널주파수보다 한 단계 높은 채널주파수와 한 단계 낮은 주파수를 튜닝하여 상기 튜닝 된 채널주파수 중 인접채널의 방해주파수에 간섭이 적은 어느 하나의 채널주파수를 상기 선국된 방송 채널주파수로 튜닝하게 된다.The control unit 13 tunes the desired broadcast channel frequency to the digital tuner 11, and tunes a channel frequency one step higher and one step lower than the tuned broadcast channel frequency to disturb the adjacent channel among the tuned channel frequencies. Tuning any one channel frequency with little interference to the frequency to the tuned broadcast channel frequency.

상기 메모리(14)는 상기 제어부(13)에서 인접 채널의 방해주파수에 간섭이 적은 어느 하나의 채널주파수를 저장하게 된다. The memory 14 stores one channel frequency with less interference in the interference frequency of the adjacent channel in the control unit 13.

상기와 같이 구성되는 본 발명은 도 2에 도시한 바와 같이, 원하는 방송 채널주파수 튜닝시, 제어부(13)에서는 상기 디지털 튜너(11)에 방송채널 선국 신호를 출력하여 상기 디지털 튜너(11)로 하여금 원하는 방송 채널주파수를 선국한다(단계21).As shown in FIG. 2, in the present invention configured as described above, when tuning a desired broadcast channel frequency, the control unit 13 outputs a broadcast channel tuning signal to the digital tuner 11 so that the digital tuner 11 is output. The desired broadcast channel frequency is tuned (step 21).

이어서, 상기 제어부(13)에서는 상기 디지털 튜너(11)를 통해서 상기 선국된 방송채널에 대하여 선국된 방송채널보다 한 단계 높은 채널주파수와 한 단계 낮은 채널주파수를 선택하여 각각 튜닝하게 된다(단계22).Subsequently, the control unit 13 selects and tunes a channel frequency one step higher and one step lower than a tuned broadcast channel for the tuned broadcast channel through the digital tuner 11 (step 22). .

그리고 상기 제어부(13)에서는 상기 튜닝된 한 단계 높은 채널주파수와 한 단계 낮은 채널주파수 중 어느 하나의 채널주파수를 선택하여 상기 선국된 채널주파수로 튜닝하게 되는데, 이때 상기 제어부(13)에서는 상기 튜닝된 한 단계 높은 채널주파수가 도 3에 도시한 바와 같이, 높은 인접 채널의 방해 주파수 범위에 있는가를 판단하여(단계23), 상기 튜닝된 한 단계 높은 채널주파수가 상기 높은 인접 채널의 방해 주파수 범위에 있으면, 상기 튜닝된 한 단계 높은 채널주파수가 상기 높은 인접 채널의 방해주파수에 간섭을 받게 된다. The controller 13 selects one channel frequency of the tuned one higher channel frequency and one lower channel frequency to tune to the tuned channel frequency, wherein the controller 13 adjusts the tuned channel frequency. As shown in Fig. 3, it is determined whether the one higher channel frequency is in the interference frequency range of the high adjacent channel (step 23), and if the tuned one higher channel frequency is in the interference frequency range of the high adjacent channel, The tuned one step higher channel frequency interferes with the interference frequency of the higher adjacent channel.

그러므로 상기 제어부(13)에서는 상기 높은 인접 채널에 간섭을 받지 않게 되는 상기 튜닝된 한 단계 낮은 채널주파수를 선국된 방송 채널주파수로 튜닝하여 메모리(14)에 저장하게 된다(단계24).Therefore, the control unit 13 tunes the tuned one-step low channel frequency, which is not affected by the high adjacent channel, to the tuned broadcast channel frequency and stores it in the memory 14 (step 24).

반면에 상기 튜닝된 한 단계 높은 채널주파수가 높은 인접 채널 범위에 있지 않으면, 상기 제어부(13)에서는 상기 튜닝된 한 단계 낮은 채널주파수가 낮은 인접 채널의 방해 주파수 범위에 있는가를 판단하여(단계25), 상기 튜닝된 한 단계 낮은 채널주파수가 도 3에 도시한 바와 같이, 낮은 인접 채널의 방해주파수 범위에 있으면, 상기 튜닝된 한 단계 낮은 채널주파수는 상기 낮은 인접 채널의 방해주파수에 간섭을 받게 된다.On the other hand, if the tuned one step higher channel frequency is not in the high adjacent channel range, the controller 13 determines whether the tuned one step lower channel frequency is in the interference frequency range of the low adjacent channel (step 25), If the tuned one step lower channel frequency is in the interference frequency range of the lower adjacent channel, as shown in FIG. 3, the tuned one step lower channel frequency is interfered with the interference frequency of the low adjacent channel.

그러므로, 상기 제어부(13)에서는 상기 낮은 인접 채널의 방해주파수에 간섭을 받지 않게 되는 상기 튜닝된 한 단계 높은 채널주파수를 선국된 방송 채널주파수로 튜닝하여 메모리(14)에 저장하게 된다(단계26).Therefore, the control unit 13 tunes the tuned higher channel frequency, which is not interfered with the interference frequency of the lower adjacent channel, to the tuned broadcast channel frequency and stores it in the memory 14 (step 26). .

이상에서 설명한 바와 같이 본 발명은 원하는 방송 채널 튜닝시 방송채널을 선국하여 상기 선국된 방송채널에 대하여 한 단계 높은 방송채널과 한 단계 낮은 방송채널을 선국하여 튜닝한 후, 상기 튜닝된 한 단계 높은 방송채널과 한 단계 낮은 방송채널 중 높은 인접채널의 방해주파수와 낮은 인접 채널의 방해주파수 범위에 있는가를 판단하여 상기 튜닝된 한 단계 높은 방송채널과 한 단계 낮은 방송채널중에 인접채널의 방해주파수에 방해를 받지 않은 튜닝된 방송채널을 선국된 방송 채널로 튜닝하도록 함으로써, 방송 채널 튜닝에 최적화를 할 수 있는 효과를 제공하게 되는 것이다.As described above, according to the present invention, when tuning a desired broadcast channel, the present invention tunes a broadcast channel, tunes a higher broadcast channel and a lower broadcast channel to the tuned broadcast channel, and then tunes the tuned higher broadcast channel. The interference frequency of the high adjacent channel and the low adjacent channel of the channel and the one step lower broadcasting channel are judged to be in the range of the interference frequency of the adjacent channel among the tuned one higher and one lower broadcast channel. By tuning the untuned broadcast channel to the tuned broadcast channel, the effect of optimizing the broadcast channel tuning is provided.

Claims (6)

수신되는 디지털 방송 채널로부터 선국된 방송 채널주파수로 튜닝하는 디지털 튜너와; A digital tuner tuned to a tuned broadcast channel frequency from a received digital broadcast channel; 상기 디지털 튜너를 통해서 선국된 방송 채널주파수보다 한 단계 높은 채널주파수와 한 단계 낮은 채널주파수를 튜닝하여 상기 튜닝된 채널주파수 중 인접채널의 방해주파수에 간섭이 적은 채널주파수를 상기 선국된 방송 채널주파수로 튜닝하는 제어부를 포함하는 디지털 튜너의 주파수 튜닝 최적화 장치.Tuning the channel frequency one step higher and one step lower than the broadcast channel frequency tuned through the digital tuner, the channel frequency having less interference with the interference frequency of the adjacent channel among the tuned channel frequencies as the tuned broadcast channel frequency. An apparatus for optimizing frequency tuning of a digital tuner including a control unit for tuning. 제 1 항에 있어서, 상기 제어부는 상기 튜닝된 한 단계 높은 채널주파수가 높은 인접채널의 방해주파수 범위에 있으면, 상기 튜닝된 한 단계 낮은 채널주파수를 상기 선국된 방송채널 주파수로 튜닝하고, 상기 튜닝된 한 단계 낮은 채널주파수가 낮은 인접채널의 방해주파수 범위에 있으면, 상기 튜닝된 한 단계 높은 채널주파수를 선국된 방송채널 주파수로 튜닝하는 것을 특징으로 하는 디지털 튜너의 주파수 튜닝 최적화 장치.The tuner of claim 1, wherein the controller is further configured to tune the tuned one-step lower channel frequency to the tuned broadcast channel frequency if the tuned one-step higher channel frequency is within the interference frequency range of a high adjacent channel. And tuning the tuned one-higher channel frequency to the tuned broadcast channel frequency if the one-step lower channel frequency is within the interference frequency range of the lower adjacent channel. 제 1 항에 있어서, 상기 인접 채널의 방해주파수에 간섭이 적은 채널주파수를 저장하는 메모리를 더 포함하는 디지털 튜너의 주파수 튜닝 최적화 장치.The apparatus of claim 1, further comprising a memory configured to store a channel frequency having less interference in the interference frequency of the adjacent channel. 방송 채널주파수를 선국하는 단계와; Tuning the broadcast channel frequency; 상기 선국된 방송 채널주파수에 대하여 한 단계 높은 방송채널 주파수와 한 단계 낮은 방송채널 주파수를 튜닝하는 단계와; Tuning a higher broadcast channel frequency and a lower broadcast channel frequency with respect to the tuned broadcast channel frequency; 상기 튜닝된 한 단계 높은 방송채널 주파수와 상기 한 단계 낮은 방송채널 주파수 중 인접 채널의 방해주파수에 간섭이 적은 튜닝된 방송채널 주파수를 상기 선국된 방송 채널주파수로 튜닝하는 단계를 포함하는 디지털 튜너의 주파수 튜닝 최적화 방법.And tuning the tuned broadcast channel frequency having less interference to the interference frequency of an adjacent channel among the tuned one higher broadcast channel frequency and the one lower broadcast channel frequency to the tuned broadcast channel frequency. How to optimize tuning. 제 4 항에 있어서, 상기 튜닝된 한 단계 높은 채널주파수가 높은 인접채널의 방해주파수 범위에 있으면, 상기 선국된 방송 채널주파수를 상기 튜닝된 한 단계 낮은 채널주파수로 튜닝하고, 상기 튜닝된 한 단계 낮은 채널주파수가 낮은 인접채널의 방해주파수 범위에 있으면, 선국된 방송 채널주파수를 상기 튜닝된 한 단계 높은 채널주파수로 튜닝하는 것을 특징으로 하는 디지털 튜너의 주파수 튜닝 최적화 방법.5. The method of claim 4, wherein the tuned broadcast channel frequency is tuned to the tuned one step lower channel frequency if the tuned one step higher channel frequency is in the interference frequency range of a high adjacent channel, and the tuned one step lower. And tuning the tuned broadcast channel frequency to the tuned higher channel frequency if the channel frequency is in the interference frequency range of a low adjacent channel. 제 4 항에 있어서, 상기 인접 채널의 방해주파수에 간섭이 적은 채널주파수를 저장하는 단계를 더 포함하는 디지털 튜너의 주파수 튜닝 최적화 방법.5. The method of claim 4, further comprising storing channel frequencies with less interference in the interference frequencies of the adjacent channels.
KR1020060084072A 2006-09-01 2006-09-01 Apparatus and method for optimizating frequency tuning of digital tuner KR20080020782A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110096293A (en) * 2010-02-22 2011-08-30 엘지전자 주식회사 Apparatus and method for channel setting of broadcasting signal in image display device
WO2015115727A1 (en) * 2014-01-28 2015-08-06 Samsung Electronics Co., Ltd. Broadcasting receiving apparatus, external apparatus, method for generating signal, and method for receiving signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110096293A (en) * 2010-02-22 2011-08-30 엘지전자 주식회사 Apparatus and method for channel setting of broadcasting signal in image display device
WO2015115727A1 (en) * 2014-01-28 2015-08-06 Samsung Electronics Co., Ltd. Broadcasting receiving apparatus, external apparatus, method for generating signal, and method for receiving signal
US9699662B2 (en) 2014-01-28 2017-07-04 Samsung Electronics Co., Ltd. Broadcasting receiving apparatus, external apparatus, method for generating signal, and method for receiving signal

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