JPS62269480A - Video receiver - Google Patents
Video receiverInfo
- Publication number
- JPS62269480A JPS62269480A JP11330986A JP11330986A JPS62269480A JP S62269480 A JPS62269480 A JP S62269480A JP 11330986 A JP11330986 A JP 11330986A JP 11330986 A JP11330986 A JP 11330986A JP S62269480 A JPS62269480 A JP S62269480A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- channel
- signal
- microcomputer
- circuit
- 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
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 230000010355 oscillation Effects 0.000 claims abstract description 7
- 230000005236 sound signal Effects 0.000 description 9
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、ＲＦコンバータを有する映像受信装置に関
し、特にそのＲＦコンバータにおける受信信号のＶＨＦ
ロウチャンネルの空チャンネルを自動的に識別する空チ
ャンネル識別回路を有するものに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a video receiving device having an RF converter, and particularly to a VHF converter of a received signal in the RF converter.
The present invention relates to an empty channel identification circuit that automatically identifies an empty row channel.
第２図は従来のこの種の映像受信装置の一例を示し、以
下、この第２図に基づいて説明を行う。FIG. 2 shows an example of a conventional video receiving apparatus of this type, and the following description will be given based on this FIG.
第２図において、１はＲＦコンバータ、２はチューナ、
３はＶＩＦ−３ＴＦ検波回路、６は映像信号処理回路、
７は音声信号処理回路、８はモニタ、９はアンテナ、１
ａはＲＦ信号の周波数を切替えるためのスイッチである
。In Fig. 2, 1 is an RF converter, 2 is a tuner,
3 is a VIF-3TF detection circuit, 6 is a video signal processing circuit,
7 is an audio signal processing circuit, 8 is a monitor, 9 is an antenna, 1
a is a switch for changing the frequency of the RF signal.
次に動作について説明する。ＲＦコンバータ１はその内
部のスイッチによりアンテナ７からの受信信号をそのま
まモニタ８あるいはチューナ２に切替え出力することが
できる。以下アンテナ９の受信信号がチューナ２に出力
される場合についてのみ説明する。Next, the operation will be explained. The RF converter 1 can switch and output the received signal from the antenna 7 as it is to the monitor 8 or tuner 2 by using an internal switch. Only the case where the received signal from the antenna 9 is output to the tuner 2 will be described below.
アンテナ９で受信された信号はＲＦコンバータ１を通し
てチューナ２に送られて映像中間周波信号に変換される
。その映像中間周波信号はＶＩＰ・ＳＩＦ検波回路３に
より検波され、映像信号。The signal received by the antenna 9 is sent to the tuner 2 through the RF converter 1 and converted into a video intermediate frequency signal. The video intermediate frequency signal is detected by the VIP/SIF detection circuit 3 and becomes a video signal.
音声信号に分離されてそれぞれ映像信号処理回路６と音
声信号処理回路７とに送られる。映像信号処理回路６と
音声信号処理回路７とで処理された信号はＲＦコンバー
タ１に送られ、ＲＦ倍信号変換されてモニタ８に送られ
る。ＲＦコンバータ１の発振周波数は切替えスイッチ１
ａによりアンテナ９で受信信号のないＶＨＦロウチャン
ネルに手動で切替えられる。The signal is separated into audio signals and sent to a video signal processing circuit 6 and an audio signal processing circuit 7, respectively. The signal processed by the video signal processing circuit 6 and the audio signal processing circuit 7 is sent to the RF converter 1, converted into an RF signal, and sent to the monitor 8. The oscillation frequency of RF converter 1 is set by switch 1.
a, the antenna 9 is manually switched to a VHF low channel with no received signal.
従来の映像受信装置は以上のように構成されており、Ｒ
Ｆコンバータの発振周波数を切替えるのは、ＲＦ周波数
切替えスイッチ１ａを手動で操作して行っているため、
放送のＶＨＦロウチャンネルの空チャンネルがどのチャ
ンネルであるかを視聴者が見つけなければならず、誤っ
て放送と同一チャンネルを指定すると、妨害が発生する
などの問題点があった。The conventional video receiving device is configured as described above, and R
The oscillation frequency of the F converter is changed by manually operating the RF frequency selection switch 1a.
The viewer has to find out which channel is available on the VHF raw channel of the broadcast, and if the same channel as the broadcast is specified by mistake, interference may occur.
この発明は、上記のような問題点を解消するためになさ
れたもので、Ｖ ＨＦ ｏ ｌ′７チャンネルの放送の
空チャンネルを自動識別してＲＦコンバータの発振周波
数を自動切替えすることができる映像受信装置を得るこ
とを目的とする。This invention was made in order to solve the above-mentioned problems, and provides a video system that can automatically identify the empty channel of VHF o l'7 broadcast and automatically switch the oscillation frequency of the RF converter. The purpose is to obtain a receiving device.
この発明に係る映像受信装置は、アンテナからの受信信
号を検波し同期信号分離回路によりその検波出力から同
期信号のみを抜き取り、その信号の有無をマイクロコン
ピュータで検出し、マイクロコンピュータの制御信号に
よりＲＦコンバータの発振周波数を切替えるようにした
ものである。The video receiving device according to the present invention detects a received signal from an antenna, extracts only a synchronizing signal from the detected output using a synchronizing signal separation circuit, detects the presence or absence of the signal with a microcomputer, and transmits an RF signal using a control signal from the microcomputer. It is designed to switch the oscillation frequency of the converter.
この発明においては、マイクロコンピュータからなる空
チャンネル識別回路は該マイクロコンピュータのチュー
ニング電圧でチューニングされたチャンネルの検波信号
の中から同期信号分離回路で分離された同期信号の有無
を検出し、該同期信号の有無に応じてＲＦコンバータの
チャンネルを自動的に切り替えるから、手動指定による
妨害の発生を防止できる。またチャンネル切替えスイッ
チが削除できるから、コスト面で安価になる。In this invention, an empty channel identification circuit made of a microcomputer detects the presence or absence of a synchronization signal separated by a synchronization signal separation circuit from among the detection signals of channels tuned by the tuning voltage of the microcomputer, and detects the presence or absence of a synchronization signal separated by a synchronization signal separation circuit. Since the RF converter channel is automatically switched depending on the presence or absence of the RF converter, interference caused by manual specification can be prevented. Also, since the channel changeover switch can be removed, the cost is reduced.
以下この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例による映像受信装置を示し、
図において、１はＲＦコンバータ、２はチューナ、３は
ＶＩＰ−３ＩＦ検波回路：、４は同期信号分離回路、５
はマイクロコンピュータ（空チャンネル識別回路）、６
は映像信号処理回路、７は音声信号処理回路、８はモニ
タ、９はアンテナである。FIG. 1 shows a video receiving device according to an embodiment of the present invention,
In the figure, 1 is an RF converter, 2 is a tuner, 3 is a VIP-3IF detection circuit, 4 is a synchronization signal separation circuit, and 5
is a microcomputer (empty channel identification circuit), 6
7 is a video signal processing circuit, 7 is an audio signal processing circuit, 8 is a monitor, and 9 is an antenna.
次に動作について説明する。アンテナ９により受信され
た信号は、ＲＦコンバータ１を通過してチューナ２に送
られる。マイクロコンピュータ５はＶ ＨＦロウチャン
ネルの１チャンネル（アメリカでは３チャンネル）の選
局バンド情報とチューニング電圧とをチューナ２に送る
。受信信号に１チャンネルの放送があればチューナ２に
より映像中間周波数に変換される。もし１チャンネルの
放送がなければ、映像中間周波数は出力されない。Next, the operation will be explained. The signal received by antenna 9 passes through RF converter 1 and is sent to tuner 2. The microcomputer 5 sends to the tuner 2 the selected band information and tuning voltage for channel 1 (channel 3 in America) of the VHF low channel. If the received signal contains one channel of broadcasting, the tuner 2 converts it to a video intermediate frequency. If there is no broadcast on channel 1, no video intermediate frequency is output.
次に映像中間周波数に変換された信号はＶＩＰ・ＳＩＦ
検波回路３で検波され、映像信号と音声信号とに分離さ
れ、映像信号は映像信号処理回路６に、音声信号は音声
信号処理回路７にそれぞれ送られる。映像信号は同期信
号分離回路４で同期信号だけに分離されてマイクロコン
ピュータ５に送られる。マイクロコンピュータ５は同期
信号分離回路４から送られてくる同期信号の有無を検出
することによりＲＦコンバータ１に対してＲＦコンバー
タ内の発振器のチャンネルを切替える情報を送る。但し
この回路はチャンネル設定時のみ動作し、設定が終了す
るとマイクロコンピュータはチャンネル情報のみをＲＦ
コンバータ１に送り続ける。Next, the signal converted to video intermediate frequency is VIP/SIF
The signal is detected by the detection circuit 3 and separated into a video signal and an audio signal, and the video signal is sent to the video signal processing circuit 6 and the audio signal to the audio signal processing circuit 7, respectively. The video signal is separated into only synchronization signals by a synchronization signal separation circuit 4 and sent to a microcomputer 5. The microcomputer 5 detects the presence or absence of the synchronization signal sent from the synchronization signal separation circuit 4 and sends information to the RF converter 1 to switch the channel of the oscillator in the RF converter. However, this circuit operates only when setting the channel, and once the setting is completed, the microcomputer transmits only the channel information to the RF.
Continue sending to converter 1.
以上のように、この発明に係る映像受信装置によれば、
従来手動で行っていたＲＦコンバータのチャンネル切替
えをマイクロコンピュータの制御信号により行うように
構成したので、手動操作による誤指定がなくなり、妨害
の発生を完全に除去できるうえＲＦコンバータのチャン
ネル切替えスイッチを削除できるので、安価に構成でき
るものが得られる効果がある。As described above, according to the video receiving device according to the present invention,
Channel switching of the RF converter, which was conventionally done manually, is now done using a control signal from a microcomputer, eliminating incorrect designations due to manual operation, completely eliminating interference, and eliminating the need for a channel selection switch on the RF converter. Therefore, it is possible to obtain a device that can be constructed at low cost.
第１図はこの発明の一実施例による映像受信装置のブロ
ック図、第２図は従来の映像受信装置のブロック図であ
る。
１・・・ＲＦコンバータ、２・・・チューナ、３・・・
ＶＩＦ−３ＩＦ検波回路、４・・・同期信号分離回路、
５・・・マイクロコンピュータ（空チャンネル識別回路
）、６・・・映像信号処理回路、７・・・音声信号処理
回路、８・・・モニタ、９・・・アンテナ。FIG. 1 is a block diagram of a video receiving device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional video receiving device. 1...RF converter, 2...Tuner, 3...
VIF-3IF detection circuit, 4... synchronous signal separation circuit,
5... Microcomputer (empty channel identification circuit), 6... Video signal processing circuit, 7... Audio signal processing circuit, 8... Monitor, 9... Antenna.
Claims (2)
発振周波数を切替え可能なＲＦコンバータと、 アンテナからの受信信号から同期信号を分離する同期分
離回路と、 該同期分離回路の出力の有無によりＶＨＦロウチャンネ
ルのうちの空チャンネルを判別し上記ＲＦコンバータの
発振周波数を当該空チャンネルに等しい周波数に切替え
る空チャンネル識別回路とを備えたことを特徴とする映
像受信装置。(1) An RF converter that can switch the oscillation frequency of the VHF low channel of broadcasting in Japan and the United States, a sync separation circuit that separates the sync signal from the signal received from the antenna, and a sync separation circuit that separates the sync signal from the signal received from the antenna. A video receiving device comprising: an empty channel identification circuit that identifies an empty channel among the channels and switches the oscillation frequency of the RF converter to a frequency equal to that of the empty channel.
からの信号が入力されるチューナを制御するためのマイ
クロコンピュータからなることを特徴とする特許請求の
範囲第１項記載の映像受信装置。(2) The video receiving apparatus according to claim 1, wherein the empty channel identification circuit comprises a microcomputer for controlling a tuner to which the signal from the antenna input is input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11330986A JPS62269480A (en) | 1986-05-16 | 1986-05-16 | Video receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11330986A JPS62269480A (en) | 1986-05-16 | 1986-05-16 | Video receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62269480A true JPS62269480A (en) | 1987-11-21 |
Family
ID=14608968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11330986A Pending JPS62269480A (en) | 1986-05-16 | 1986-05-16 | Video receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62269480A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980037136A (en) * | 1996-11-20 | 1998-08-05 | 조희재 | Converter for video signal processing |
-
1986
- 1986-05-16 JP JP11330986A patent/JPS62269480A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980037136A (en) * | 1996-11-20 | 1998-08-05 | 조희재 | Converter for video signal processing |
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