JP2834235B2 - Video tape recorder - Google Patents

Video tape recorder

Info

Publication number
JP2834235B2
JP2834235B2 JP1307669A JP30766989A JP2834235B2 JP 2834235 B2 JP2834235 B2 JP 2834235B2 JP 1307669 A JP1307669 A JP 1307669A JP 30766989 A JP30766989 A JP 30766989A JP 2834235 B2 JP2834235 B2 JP 2834235B2
Authority
JP
Japan
Prior art keywords
test pattern
circuit
command
generating
character
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.)
Expired - Fee Related
Application number
JP1307669A
Other languages
Japanese (ja)
Other versions
JPH03169182A (en
Inventor
洋司 三上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1307669A priority Critical patent/JP2834235B2/en
Publication of JPH03169182A publication Critical patent/JPH03169182A/en
Application granted granted Critical
Publication of JP2834235B2 publication Critical patent/JP2834235B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、ビデオテープレコーダ(以後VTRという)
とテレビ(以後TVという)との同調をとるビデオテープ
レコーダに係り、特に回路の簡略化に有効なビデオテー
プレコーダに関する。
The present invention relates to a video tape recorder (hereinafter referred to as a VTR).
The present invention relates to a video tape recorder that synchronizes with a television (hereinafter referred to as a TV), and more particularly to a video tape recorder that is effective for simplifying a circuit.

[従来の技術] VTRの操作を容易にするために、操作メニューをTV画
面に表示することを可能にしたVTRが市販されている。
なおこの種の装置として関連するものには例えば特表昭
64−500158号等が挙げられる。
[Prior Art] In order to facilitate operation of a VTR, a VTR that allows an operation menu to be displayed on a TV screen is commercially available.
In addition, related devices as this type include, for example,
No. 64-500158 and the like.

[発明が解決しようとする問題点] 上記従来技術は操作性の向上に関するものでありVTR
の内部回路を簡略化または削除するところまで利用され
ていなかった。
[Problems to be Solved by the Invention] The above-mentioned prior art relates to improvement of operability, and the VTR
Has not been used to simplify or eliminate the internal circuit of the device.

本発明の目的は従来必要としたTVとVTRの同調をとる
ためのテストパターン発生回路を削除することにある。
SUMMARY OF THE INVENTION An object of the present invention is to eliminate a test pattern generation circuit for tuning a TV and a VTR, which is conventionally required.

[問題点を解決するための手段] 上記目的は、VTRに使用されている文字記号発生回路
(ON SCREEN DISPLAY回路)を使用して文字発生表示を
作成し、その表示でTV受像機とビデオテープレコーダの
同調をとることにより達せられる。
[Means for Solving the Problems] The above object is to create a character generation display using a character / symbol generation circuit (ON SCREEN DISPLAY circuit) used in a VTR, and use the display to display a TV receiver and a video tape. Achieved by tuning the recorder.

[作用] VTRのある操作キーを押すことにより、文字記号発生
回路からテストパターン表示を発生させ、これを映像信
号として変調回路より、TV受像機のアンテナに入力す
る。
[Operation] By pressing an operation key having a VTR, a test pattern display is generated from the character / symbol generation circuit, and this is input as a video signal from the modulation circuit to the antenna of the TV receiver.

この時、TV受像機の受信周波数を変化させると、上記
テストパターン表示が現われる個所がある。それがTVと
VTRの同調ポイントであり、同調がとれることになる。
At this time, when the receiving frequency of the TV receiver is changed, there is a place where the test pattern display appears. That's TV
This is the tuning point of the VTR, and tuning can be achieved.

[実施例] 以下、本発明の一実施例を第1図により説明する。Embodiment An embodiment of the present invention will be described below with reference to FIG.

本発明は、テストパターンを発生する場合に使用する
キー入力回路1、そのキー入力を検知して文字記号発生
回路に指令を発するシステム制御回路2、テストパター
ンを映像信号として出力する文字記号発生回路3、及び
この映像信号を変調してRF信号に変換する変調回路4、
変調信号を受信して画面に写し出すTV受像機5から構成
される。
The present invention relates to a key input circuit 1 used for generating a test pattern, a system control circuit 2 for detecting the key input and issuing a command to a character / symbol generating circuit, and a character / symbol generating circuit for outputting the test pattern as a video signal. 3, and a modulation circuit 4, which modulates this video signal and converts it into an RF signal.
It comprises a TV receiver 5 for receiving a modulated signal and displaying it on a screen.

まず、TVとVTRをRFケーブルで接続した後、VTRのキー
入力1を押す。これによってシステム制御回路2はテス
トパターンを発生させる指令を文字記号発生回路3に送
信する。文字記号発生回路3は、あらかじめ決められた
テストパターン信号(第2図)を発生し、これを映像信
号に変えて出力する。この出力を変調回路4がRF信号に
変換して、アンテナ、ケーブルを経由してTV受像機に送
信する。
First, after connecting the TV and the VTR with the RF cable, press the key input 1 of the VTR. As a result, the system control circuit 2 transmits a command for generating a test pattern to the character / symbol generation circuit 3. The character / symbol generating circuit 3 generates a predetermined test pattern signal (FIG. 2), converts this into a video signal, and outputs it. The output is converted to an RF signal by the modulation circuit 4 and transmitted to the TV receiver via the antenna and the cable.

この時、VTR側でRF信号の周波数を調整するか、TV側
にて同じく調整することにより、VTRの発生するテスト
パターンをTV受像機に映し出すことができる。これによ
ってTVとVTRの同調がとれることになる。
At this time, by adjusting the frequency of the RF signal on the VTR side or the same on the TV side, the test pattern generated by the VTR can be displayed on the TV receiver. As a result, TV and VTR can be synchronized.

[発明の効果] 本発明によれば、従来のテストパターン回路を削除す
ることができる。また従来のテストパターン回路ではな
いことが多い垂直同期信号もあるため、チューニングを
映像信号の垂直同期信号を使ってとっているTVにおいて
は、本テストパターンをチューニングサーチストップさ
せることが出来、便利である。
[Effects of the Invention] According to the present invention, the conventional test pattern circuit can be eliminated. In addition, since there are many vertical synchronization signals that are not conventional test pattern circuits, this test pattern can be used for tuning search stop on TVs that use the vertical synchronization signal of video signals for tuning. is there.

【図面の簡単な説明】[Brief description of the drawings]

第1図は本発明の一実施例のブロック図、第2図はテス
トパターンの具体例を示す図である。 1……キー入力回路、2……システム制御回路、3……
文字記号発生回路、4……変調回路、5……TV受像機。
FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a diagram showing a specific example of a test pattern. 1 ... key input circuit, 2 ... system control circuit, 3 ...
Character symbol generation circuit, 4 modulation circuit, 5 TV receiver.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】操作者がキー操作を入力するキー入力回路
と、 映像信号を高周波で変調してテレビ受信機へ出力する変
調回路と、 通常は、操作メニューを示す文字記号を発生させるため
の司令を送信するとともに、該キー入力回路のキー操作
を検知して特定のキー操作があった場合には、テストパ
ターンを発生させるための司令を送信する制御手段と、 該制御手段から前記文字記号を発生させるための司令を
受信した場合は、該文字記号を発生し、映像信号に重畳
して該変調回路へ出力するとともに、該制御手段から前
記テストパターンを発生させるための司令を受信した場
合には、予め定められたテストパターン信号からなる映
像信号を該変調回路へ出力する文字記号発生回路とを設
け、 前記テレビ受信機との同調をとることを特徴とするビデ
オテープレコーダ。
A key input circuit for inputting a key operation by an operator; a modulation circuit for modulating a video signal at a high frequency and outputting the modulated signal to a television receiver; A control means for transmitting a command and transmitting a command for generating a test pattern when a specific key operation is detected by detecting a key operation of the key input circuit; and When a command for generating the test pattern is received, the character symbol is generated, superimposed on the video signal and output to the modulation circuit, and a command for generating the test pattern is received from the control unit. And a character / symbol generation circuit that outputs a video signal composed of a predetermined test pattern signal to the modulation circuit, and tunes with the television receiver. Video tape recorder.
JP1307669A 1989-11-29 1989-11-29 Video tape recorder Expired - Fee Related JP2834235B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1307669A JP2834235B2 (en) 1989-11-29 1989-11-29 Video tape recorder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1307669A JP2834235B2 (en) 1989-11-29 1989-11-29 Video tape recorder

Publications (2)

Publication Number Publication Date
JPH03169182A JPH03169182A (en) 1991-07-22
JP2834235B2 true JP2834235B2 (en) 1998-12-09

Family

ID=17971816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1307669A Expired - Fee Related JP2834235B2 (en) 1989-11-29 1989-11-29 Video tape recorder

Country Status (1)

Country Link
JP (1) JP2834235B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008092487A (en) * 2006-10-05 2008-04-17 Will:Kk Signal generating apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57140693A (en) * 1981-02-23 1982-08-31 Sanko Kisen Kk Processing unit for oil-mixed waste water with utilization of exhaust heat
JPS60191582A (en) * 1984-03-13 1985-09-30 Hitachi Ltd Video tape recorder
JPS63203076A (en) * 1987-02-18 1988-08-22 Sanyo Electric Co Ltd Character signal display circuit for vtr

Also Published As

Publication number Publication date
JPH03169182A (en) 1991-07-22

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