JPH07336612A - Television receiver - Google Patents
Television receiverInfo
- Publication number
- JPH07336612A JPH07336612A JP12646194A JP12646194A JPH07336612A JP H07336612 A JPH07336612 A JP H07336612A JP 12646194 A JP12646194 A JP 12646194A JP 12646194 A JP12646194 A JP 12646194A JP H07336612 A JPH07336612 A JP H07336612A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- reception
- television
- video signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、テレビ，ビデオレコー
ダ等のテレビチューナを搭載したテレビ受信装置に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver equipped with a television tuner such as a television or a video recorder.
【０００２】[0002]
【従来の技術】近年、テレビ受信装置における難視聴地
域対策のためにサテライト放送局が増加し、同一の放送
が複数チャンネルで受信可能な地域が増加してきてい
る。またケーブルテレビのようにスプリアスの多い放送
も増加してきている。2. Description of the Related Art In recent years, satellite broadcasting stations have been increasing in order to cope with difficult-to-view areas in television receivers, and areas where the same broadcast can be received by a plurality of channels are increasing. Broadcasting with a lot of spurs, such as cable television, is also increasing.
【０００３】以下に、従来のテレビ受信装置について説
明する。図６は従来の自動受信選局回路を備えたテレビ
受信装置の構成を示すブロック図であり、チューナ１に
おいてテレビ信号を受信してＩＦ信号に変換する。変換
された信号は、ＳＡＷ(surface acoustic waves)フィル
タ２を通って、映像信号中間周波増幅検波回路３に入力
し、映像信号検波回路５およびＡＦＣ(自動周波数制御)
回路６において、それぞれ映像信号検波出力，ＡＦＣ出
力が出力される。映像信号検出回路９で映像信号の有無
を判定した信号およびＡＦＣ回路６の出力を選局回路
(マイクロコンピュータ)10に入力し、映像信号の最適受
信を判定する。なお、映像信号中間周波増幅検波回路３
において、４は映像信号増幅器、７はＡＧＣ(自動利得
制御)回路、８は電圧制御発振器である。A conventional television receiver will be described below. FIG. 6 is a block diagram showing the configuration of a conventional television receiving device including an automatic reception channel selection circuit, in which a tuner 1 receives a television signal and converts it into an IF signal. The converted signal passes through a SAW (surface acoustic waves) filter 2 and is input to a video signal intermediate frequency amplification detection circuit 3 which then outputs the video signal detection circuit 5 and AFC (automatic frequency control).
The circuit 6 outputs a video signal detection output and an AFC output, respectively. The signal for which the presence / absence of a video signal is determined by the video signal detection circuit 9 and the output of the AFC circuit 6 are channel selection circuits.
(Microcomputer) 10 to determine the optimum reception of the video signal. The video signal intermediate frequency amplification detection circuit 3
In the figure, 4 is a video signal amplifier, 7 is an AGC (automatic gain control) circuit, and 8 is a voltage controlled oscillator.
【０００４】以上のように構成されたテレビ受信装置に
ついて、その動作について説明する。自動選局時は、各
受信チャンネルごとに映像信号最適受信を判定し、映像
信号有と判定した場合にはメモリ11の選局ポジションに
記憶する。全チャンネル自動選局後は、映像有チャンネ
ルだけメモリ11に記憶され、その記憶された各ポジジョ
ンのチャンネルを直接呼び出し、選局することが可能と
なる。The operation of the television receiver configured as above will be described. At the time of automatic channel selection, optimal reception of a video signal is determined for each reception channel, and when it is determined that a video signal is present, it is stored in the channel selection position of the memory 11. After automatic tuning of all channels, only the channels with video are stored in the memory 11, and it becomes possible to directly call up the channels of the respective stored positions to select a channel.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記従
来の構成では、テレビ信号の強弱に関わらず、映像信号
が有と判定されればメモリの選局ポジションに記憶され
ていたため、サテライト放送局が多い地域およびスプリ
アス信号の多い地域では、本来、受信希望の強い電波の
信号以外に、受信を希望していない弱い別地域向サテラ
イト信号やスプリアスまで信号有と判定され、受信を希
望していない信号まで選局ポジションに記憶されてい
た、という問題を有していた。However, in the above-mentioned conventional configuration, there are many satellite broadcasting stations because the video signal is stored in the selected position of the memory if it is determined that the video signal exists regardless of the strength of the television signal. In areas and areas with a lot of spurious signals, it is determined that signals other than those of strong radio waves that are originally desired to be received are for satellite signals and spurious signals to other weak areas that do not want to be received, and signals that do not want to be received. It had a problem that it was stored in the tuning position.
【０００６】本発明の目的は、前記問題を解決するもの
で、受信を希望していない弱いテレビ信号を選局ポジシ
ョンに記憶させないことを可能にしたテレビ受信装置を
提供することにある。An object of the present invention is to solve the above problem and to provide a television receiving apparatus capable of preventing weak television signals which are not desired to be received from being stored in a tuning position.
【０００７】[0007]
【発明が解決しようとする課題】前記目的を達成するた
めに、本発明のテレビ受信装置は、テレビ受信チャンネ
ルの受信信号レベルを設定する設定回路と、設定された
信号レベルに合わせて受信信号の信号レベルを判定する
判定回路と、設定された信号レベルのテレビ受信チャン
ネルを記憶する記憶回路と、この記憶回路の選局ポジシ
ョンに設定された信号レベルのテレビ受信チャンネルの
みを記憶させる選択回路とを備えたことを特徴とする。In order to achieve the above object, the television receiving apparatus of the present invention includes a setting circuit for setting a receiving signal level of a television receiving channel, and a receiving signal according to the set signal level. A determination circuit for determining the signal level, a storage circuit for storing the television reception channel of the set signal level, and a selection circuit for storing only the television reception channel of the signal level set in the tuning position of the storage circuit. It is characterized by having.
【０００８】またテレビ受信チャンネルを入力電界に応
じて記憶するか否かを数段階で設定可能な受信選択回路
を備えたことを特徴とする。Further, it is characterized in that a reception selection circuit capable of setting whether or not to store the television reception channel according to the input electric field in several stages is provided.
【０００９】また画像信号の検出感度を設定することで
テレビ受信チャンネルの受信信号レベルを任意に設定す
ることを特徴とする。Further, it is characterized in that the reception signal level of the television reception channel is arbitrarily set by setting the detection sensitivity of the image signal.
【００１０】[0010]
【作用】前記構成の本発明に係るテレビ受信装置では、
受信信号レベルを数段階切り換え、サテライト放送局の
多い地域やスプリアスの多い地域において、弱い信号を
受信不可とする設定を可能とし、希望していないチャン
ネルを受信することを防ぐ。In the television receiver according to the present invention having the above structure,
The reception signal level is switched in several steps, and in a region with many satellite broadcasting stations or a region with many spurious signals, it is possible to set the weak signal to be unreceivable and prevent receiving undesired channels.
【００１１】[0011]
【実施例】以下、本発明の実施例について図面を参照し
ながら説明する。なお、図６に基づいて説明した部材に
対応する部材には同一符号を付して詳しい説明は省略す
る。Embodiments of the present invention will be described below with reference to the drawings. The members corresponding to those described with reference to FIG. 6 are designated by the same reference numerals, and detailed description thereof will be omitted.
【００１２】図１は本発明の第１実施例の構成を示すブ
ロック図であり、チューナ１にてテレビ信号を受信して
ＩＦ信号に変換する。変換された信号は、ＳＡＷフィル
タ２を通って映像信号中間周波増幅検波回路３に入力
し、映像信号検波回路５およびＡＦＣ回路６において、
それぞれ映像信号検波出力，ＡＦＣ出力が出力される。
映像信号検出回路９で映像信号の有無を判定した信号お
よびＡＦＣ回路６の出力を選局回路10に入力する。FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention, in which a tuner 1 receives a television signal and converts it into an IF signal. The converted signal is input to the video signal intermediate frequency amplification detection circuit 3 through the SAW filter 2, and in the video signal detection circuit 5 and the AFC circuit 6,
Video signal detection output and AFC output are output, respectively.
The signal for which the video signal detection circuit 9 determines the presence or absence of the video signal and the output of the AFC circuit 6 are input to the channel selection circuit 10.
【００１３】また入力電界を検出して電圧に変換するＡ
ＧＣ回路７より出力されたＩＦ・ＡＧＣ，ＲＦ・ＡＧＣの
各電圧を使用し、受信信号レベル設定回路12にて設定さ
れたレベルを受信信号レベル判定回路13にて設定された
信号レベル以上かどうかを判定し、選局回路10に入力し
て選択されたチャンネルをメモリ11に記憶するかどうか
選択する。A for detecting an input electric field and converting it into a voltage A
Whether the level set by the reception signal level setting circuit 12 is equal to or higher than the signal level set by the reception signal level determination circuit 13 by using each voltage of IF / AGC and RF / AGC output from the GC circuit 7 Is input to the channel selection circuit 10 to select whether or not to store the selected channel in the memory 11.
【００１４】以上のように構成された自動受信選局回路
を備えたテレビ受信装置について、図２を用いてその動
作を説明する。The operation of the television receiver provided with the automatic reception tuning circuit configured as described above will be described with reference to FIG.
【００１５】図２は入力電界とＩＦ・ＡＧＣの関係を示
す図であり、入力電界がそれぞれａ，ｂ，ｃの場合に、
ＩＦ・ＡＧＣ電圧はそれぞれＡ，Ｂ，Ｃとなる。FIG. 2 is a diagram showing the relationship between the input electric field and the IF / AGC. When the input electric fields are a, b, and c, respectively,
The IF / AGC voltages are A, B, and C, respectively.
【００１６】このことを利用し、図３の第１実施例の要
部の具体的回路ブロック図に示すように、受信信号レベ
ル設定回路12で希望するレベル設定ａ，ｂ，ｃ(dBμV)
の１つを選択し、それに相当する電圧Ａ，Ｂ，Ｃ(Ｖ)を
出力する。受信信号レベル判定回路13の電圧比較器14に
てＩＦ・ＡＧＣ電圧と比較し、選局回路10に受信設定の
可否を指令する。Utilizing this fact, as shown in the concrete circuit block diagram of the essential part of the first embodiment of FIG. 3, the desired level setting a, b, c (dB μV) in the reception signal level setting circuit 12 is obtained.
, And outputs the corresponding voltages A, B, C (V). The voltage comparator 14 of the reception signal level determination circuit 13 compares with the IF / AGC voltage and instructs the tuning circuit 10 whether reception setting is possible.
【００１７】本実施例による入力電界レベルと自動受信
選局設定可否と、従来装置の受信選局設定可否との関係
を(表１)に比較して示した。なお、(表１)において、○
は自動受信設定可を示し、×は自動受信設定不可を示し
ている。The relationship between the input electric field level according to the present embodiment, whether automatic channel selection can be set and whether conventional channel selection can be set is shown in comparison with (Table 1). In (Table 1), ○
Indicates that automatic reception can be set, and x indicates that automatic reception cannot be set.
【００１８】[0018]
【表１】 [Table 1]
【００１９】(表１)から明らかなように、本実施例によ
る自動受信選局回路を備えたテレビ受信装置は、希望す
る受信信号レベルを任意に設定し、そのレベル以上の信
号をメモリの選局ポジションに記憶する回路を設けるこ
とにより、従来希望しない信号まで記憶していたことを
回避できる。As is clear from Table 1, the television receiving apparatus provided with the automatic reception tuning circuit according to the present embodiment arbitrarily sets a desired reception signal level and selects a signal higher than that level in the memory. By providing a circuit for storing in the station position, it is possible to avoid storing even undesired signals in the past.
【００２０】図４は本発明の第２実施例の構成を示すブ
ロック図であり、この第２実施例において、前記第１実
施例の構成と異なるのは、受信信号レベル設定として、
映像信号検出回路９の検出感度を受信信号レベル設定回
路12および映像信号検出感度設定回路20にて行った点に
ある。FIG. 4 is a block diagram showing the configuration of the second embodiment of the present invention. In the second embodiment, the difference from the configuration of the first embodiment is that the received signal level setting is
The detection sensitivity of the video signal detection circuit 9 is determined by the reception signal level setting circuit 12 and the video signal detection sensitivity setting circuit 20.
【００２１】図５の第２実施例における要部の構成図に
基づいて、その動作を説明する。The operation will be described with reference to the block diagram of the essential parts in the second embodiment of FIG.
【００２２】まず、検波された映像信号を水平同期分離
回路21に入力して同期分離する。電圧制御発振器８で発
振した信号を水平カウントダウン回路23でカウントダウ
ンし、その信号と同期分離された信号が同期するように
水平ＡＦＣ回路22で電圧制御発振器８の発振周波数を制
御する。First, the detected video signal is input to the horizontal sync separation circuit 21 for sync separation. The signal oscillated by the voltage controlled oscillator 8 is counted down by the horizontal countdown circuit 23, and the oscillation frequency of the voltage controlled oscillator 8 is controlled by the horizontal AFC circuit 22 so that the signal is synchronized with the signal separated in synchronization.
【００２３】また、水平カウントダウン回路23でカウン
トダウンされた信号に対して同期検出回路25で同期信号
の有無を検出し、選局回路10に出力する。この際、受信
信号レベル設定回路12での設定値に合わせて映像信号検
出感度設定回路20にて前記同期検出回路25の感度を変更
することにより、受信信号レベルの設定が可能となる。Further, with respect to the signal counted down by the horizontal countdown circuit 23, the synchronization detection circuit 25 detects the presence or absence of a synchronization signal, and outputs it to the channel selection circuit 10. At this time, the reception signal level can be set by changing the sensitivity of the synchronization detection circuit 25 in the video signal detection sensitivity setting circuit 20 according to the setting value in the reception signal level setting circuit 12.
【００２４】なお、図５において、Ｒは抵抗、Ｃはコン
デンサ、Ｔrはトランジスタを示す。In FIG. 5, R is a resistor, C is a capacitor, and Tr is a transistor.
【００２５】[0025]
【発明の効果】以上説明したように、請求項１〜３記載
の発明によれば、受信信号レベル設定および判定回路を
設けることにより、希望信号以外のテレビ信号を受信不
可とすることができる優れた自動受信選局回路を備えた
テレビ受信装置を実現できる。As described above, according to the inventions of claims 1 to 3, by providing the reception signal level setting and judging circuit, it is possible to make it impossible to receive a television signal other than the desired signal. It is possible to realize a television receiver including an automatic reception tuning circuit.
【図１】本発明のテレビ受信装置の第１実施例の構成を
示すブロック図である。FIG. 1 is a block diagram showing a configuration of a first embodiment of a television receiving apparatus of the present invention.
【図２】第１実施例における入力電界−ＩＦ・ＡＧＣの
関係図である。FIG. 2 is a relationship diagram of an input electric field-IF · AGC in the first embodiment.
【図３】第１実施例における要部の具体的回路ブロック
図である。FIG. 3 is a specific circuit block diagram of a main part in the first embodiment.
【図４】本発明のテレビ受信装置の第２実施例の構成を
示すブロック図である。FIG. 4 is a block diagram showing a configuration of a second embodiment of the television receiving apparatus of the present invention.
【図５】第２実施例における映像検出回路部分の具体例
を示す構成図である。FIG. 5 is a configuration diagram showing a specific example of a video detection circuit portion in the second embodiment.
【図６】従来の自動受信選局回路を備えたテレビ受信装
置の構成を示すブロック図である。FIG. 6 is a block diagram showing a configuration of a television receiver including a conventional automatic reception channel selection circuit.
１…チューナ、 ２…ＳＡＷフィルタ、 ３…映像信号
中間周波増幅検波回路、４…映像信号増幅器、 ５…映
像信号検波回路、 ６…ＡＦＣ回路、 ７…ＡＧＣ回
路、 ８…電圧制御発振器、 ９…映像信号検出回路、
10…選局回路、11…メモリ、 12…受信信号レベル設
定回路、 13…受信信号レベル判定回路、14…電圧比較
器、 20…映像信号検出感度設定回路、 25…同期検出
回路。1 ... Tuner, 2 ... SAW filter, 3 ... Video signal intermediate frequency amplification detection circuit, 4 ... Video signal amplifier, 5 ... Video signal detection circuit, 6 ... AFC circuit, 7 ... AGC circuit, 8 ... Voltage controlled oscillator, 9 ... Video signal detection circuit,
10 ... Channel selection circuit, 11 ... Memory, 12 ... Received signal level setting circuit, 13 ... Received signal level determination circuit, 14 ... Voltage comparator, 20 ... Video signal detection sensitivity setting circuit, 25 ... Synchronous detection circuit.
Claims (3)
を設定する設定回路と、設定された信号レベルに合わせ
て受信信号の信号レベルを判定する判定回路と、設定さ
れた信号レベルのテレビ受信チャンネルを記憶する記憶
回路と、この記憶回路の選局ポジションに設定された信
号レベルのテレビ受信チャンネルのみを記憶させる選択
回路とを備えたことを特徴とするテレビ受信装置。1. A setting circuit for setting a reception signal level of a television reception channel, a judgment circuit for judging a signal level of a reception signal in accordance with the set signal level, and a television reception channel of the set signal level are stored. And a selection circuit for storing only a TV reception channel having a signal level set in a channel selection position of the storage circuit.
て記憶するか否かを数段階で設定可能な受信選択回路を
備えたことを特徴とする請求項１記載のテレビ受信装
置。2. The television receiving apparatus according to claim 1, further comprising a reception selection circuit capable of setting whether to store the television receiving channel according to an input electric field in several steps.
レビ受信チャンネルの受信信号レベルを任意に設定する
ことを特徴とする請求項１記載のテレビ受信装置。3. The television receiver according to claim 1, wherein the reception signal level of the television reception channel is arbitrarily set by setting the detection sensitivity of the image signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12646194A JPH07336612A (en) | 1994-06-08 | 1994-06-08 | Television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12646194A JPH07336612A (en) | 1994-06-08 | 1994-06-08 | Television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07336612A true JPH07336612A (en) | 1995-12-22 |
Family
ID=14935796
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12646194A Pending JPH07336612A (en) | 1994-06-08 | 1994-06-08 | Television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07336612A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0804023A2 (en) * | 1996-04-24 | 1997-10-29 | Lg Electronics Inc. | High speed channel detection, storing, and switching apparatus and method thereof |
| JP2006333126A (en) * | 2005-05-26 | 2006-12-07 | Funai Electric Co Ltd | Television |
-
1994
- 1994-06-08 JP JP12646194A patent/JPH07336612A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0804023A2 (en) * | 1996-04-24 | 1997-10-29 | Lg Electronics Inc. | High speed channel detection, storing, and switching apparatus and method thereof |
| EP0804023A3 (en) * | 1996-04-24 | 1998-09-02 | Lg Electronics Inc. | High speed channel detection, storing, and switching apparatus and method thereof |
| US6344882B1 (en) | 1996-04-24 | 2002-02-05 | Lg Electronics Inc. | High speed channel detection apparatus and related method thereof |
| EP1434430A1 (en) * | 1996-04-24 | 2004-06-30 | Lg Electronics Inc. | High speed channel detection, storing, and switching apparatus and method thereof |
| JP2006333126A (en) * | 2005-05-26 | 2006-12-07 | Funai Electric Co Ltd | Television |
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