JPS61264884A - Image converter - Google Patents

Image converter

Info

Publication number
JPS61264884A
JPS61264884A JP60106373A JP10637385A JPS61264884A JP S61264884 A JPS61264884 A JP S61264884A JP 60106373 A JP60106373 A JP 60106373A JP 10637385 A JP10637385 A JP 10637385A JP S61264884 A JPS61264884 A JP S61264884A
Authority
JP
Japan
Prior art keywords
signal
circuit
video signal
internal
synchronization
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
Application number
JP60106373A
Other languages
Japanese (ja)
Inventor
Takao Abumi
隆生 鐙
Yoshiharu Sakai
堺 芳晴
Yukio Nakayama
幸雄 中山
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP60106373A priority Critical patent/JPS61264884A/en
Publication of JPS61264884A publication Critical patent/JPS61264884A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/64Circuits for processing colour signals
    • H04N9/74Circuits for processing colour signals for obtaining special effects

Abstract

PURPOSE:To obtain a signal necessary for the conversion of an RGB signal from a computer to a video signal by converting an internal synchronism signal etc. from a synchronization generating circuit to a composite video signal at a conversion circuit and inputting it in place of an outside video signal. CONSTITUTION:Each of the internal synchronizing signal, a burst signal and a Y signal generated at a synchronization generating circuit 4 is inputted to a black burst circuit 9 and is converted to an internal generating signal S2 in the state of the composite video signal. A change-over switch 10 selects either one of an outside video signal S1 or the internal generating signal S2. With connecting the change-over switch 10 to a terminal (b) side, the internal generating signal S2. With connecting the change- over switch 10 to a terminal (b) side, the internal generating signal S2 is inputted and the signal is separated again to three signals; a Y signal 7, a chroma signal 8 and a synchronizing signal 11 through a Y-C separating circuit 5 and a synchronizing/ separating circuit 6 and they are inputted to a superimpose circuit 3. Thus, the RGB signal from a computer 1 is converted to the composite video signal by an internal synchronization. Based upon the system, it is possible to simplify a circuit so that the switching of the internal synchronization and an external synchronization is performed with one change-over switch.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、コンビュ″−夕からのRGB信号と外部映像
機器からの映像信号をミキシングする映像変換装置に関
し1例えばパソコン出力信号とテレビ信号とのスーパー
インポーズをなす装置の周辺機器として利用される。
Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a video conversion device that mixes an RGB signal from a computer and a video signal from an external video device. It is used as a peripheral device for superimposed devices.

(従来の技術) 従来の映像変換装置を第2図に示す。(Conventional technology) A conventional video conversion device is shown in FIG.

コンピュータ1からのRGB信号と外部映像機器(図示
省略)からの外部映像信号SIをミキシングするために
、この外部映像信号S、を輝度信号(Y信号)、クロマ
信号(C信号)、同期信号の3つに分離して処理してい
る。そして、これらの3種の信号はそれぞれ切換スイッ
チ2を介して。
In order to mix the RGB signal from the computer 1 and the external video signal SI from an external video device (not shown), this external video signal S is divided into a luminance signal (Y signal), a chroma signal (C signal), and a synchronization signal. It is processed separately into three parts. These three types of signals are then transmitted through changeover switches 2, respectively.

スーパーインポーズ回路3へ人力され、ここで前記RG
B信号と合成される。
is manually input to the superimpose circuit 3, where the RG
Combined with B signal.

切換スイッチ2は、前記RGB信号を外部映像信号に同
期して出力させる場合(外部同期)と。
The changeover switch 2 is used to output the RGB signal in synchronization with an external video signal (external synchronization).

映像変換装置内に設けた同期発生回路4の出力信号に同
期して出力させる場合(内部同期)とを切換えるもので
ある。
This is used to switch between output in synchronization with the output signal of the synchronization generation circuit 4 provided in the video conversion device (internal synchronization).

この同期発生回路4は、内部同期発生部d a tバー
スト信号発生部4b、Y信号(ブラック)発生部4cと
からなり、これら発生部で発生された内部同期信号、バ
ースト信号、Y信号はそれぞれ前記切換スイッチ2の端
子す側へ入力されている一方、切換スイッチ2の端子a
側には、 y−c分離回路5で分離されたY信号7及び
C信号8と同期分離回路6で取り出された同期信号がそ
れぞれ人力されている。
This synchronization generation circuit 4 consists of an internal synchronization generation section dat burst signal generation section 4b and a Y signal (black) generation section 4c, and the internal synchronization signal, burst signal, and Y signal generated by these generation sections are While the input is to the terminal a side of the changeover switch 2, the input is to the terminal a side of the changeover switch 2.
On the side, the Y signal 7 and C signal 8 separated by the y-c separation circuit 5 and the synchronization signal extracted by the synchronization separation circuit 6 are manually input.

また2図面の中には、各部の信号波形を例示している。Further, in the two drawings, signal waveforms of each part are illustrated.

(発明が解決しようとする問題点) しかるに、この種の映像変換装置における前記切換スイ
ッチ2は、3つのスイッチによって構成されており、目
的に応じてこれらのスイッチを同時に切換える必要があ
り、電子回路で構成したときに複雑になる欠点がある。
(Problems to be Solved by the Invention) However, the changeover switch 2 in this type of video conversion device is composed of three switches, and it is necessary to switch these switches simultaneously depending on the purpose, which requires an electronic circuit. The disadvantage is that it becomes complicated when configured with .

(問題点を解決するための手段) 本発明は、外部映像機器から人力される外部映像信号、
この外部映像信号とコンピュータからのRGB信号とを
ミキシングした映像信号及び映像信号に変換した前記R
GB信号のいずれかを選択して出力する装置であって、
前記RGB信号を映像信号に変換するために必要な各種
信号を発生する同期発生回路と、これら各種信号を複合
映像信号の形に変換する変換回路とが設けられ、該変換
回路の出力信号と前記外部映像信号とが切換え入力され
てなるものである。
(Means for Solving the Problems) The present invention provides an external video signal input manually from an external video device,
A video signal obtained by mixing this external video signal and an RGB signal from a computer, and the R
A device that selects and outputs one of GB signals,
A synchronization generation circuit that generates various signals necessary for converting the RGB signal into a video signal, and a conversion circuit that converts these various signals into a composite video signal are provided, and the output signal of the conversion circuit and the This is achieved by switching input with an external video signal.

(作用) 同期発生回路から出力される内部同期信号、バースト信
号、Y信号(ブラック)は変換回路に入力され、ここで
複合映像信号の形に変換され、この変換後の信号を外部
映像機器から入力される外部映像信号の代わりに入力さ
せることによって。
(Function) The internal synchronization signal, burst signal, and Y signal (black) output from the synchronization generation circuit are input to the conversion circuit, where they are converted into a composite video signal, and this converted signal is sent from external video equipment. By inputting it instead of the input external video signal.

コンピュータからのRGB信号を映像信号に変換するた
めの必要な信号となす。
Used as necessary signals for converting RGB signals from a computer into video signals.

(実施例) 以下1本発明の実施例について図面を参照して説明する
(Example) An example of the present invention will be described below with reference to the drawings.

第1図は2本発明に係わる映像変換装置を示すブロック
図であり、第2図で示したブロックと同じブロックに対
しては、同一の符号を用いている。
FIG. 1 is a block diagram showing a video converting apparatus according to the present invention, and the same reference numerals are used for blocks that are the same as those shown in FIG.

同期発生回路4で発生された内部同期信号、バースト信
号、Y信号(ブランク)のそれぞれは。
The internal synchronization signal, burst signal, and Y signal (blank) generated by the synchronization generation circuit 4 are as follows.

ブラックバースト回路9に入力され、ここで複合映像信
号の状態の内部発生信号S2に変換される。
The signal is input to the black burst circuit 9, where it is converted into an internally generated signal S2 in the state of a composite video signal.

切換スイッチ10は当該映像変換装置の入力側に設けら
れたスイッチで前記外部映像信号S、と内部発生信号S
2との一方を選択するスイッチであり、端子a側には、
テレビ、VTR等の外部映像機器から出力される外部映
像信号Slが入力され、端子す側には前記ブランクバー
スト回路9から出力される前記内部発生信号S2が入力
されている。
The changeover switch 10 is a switch provided on the input side of the video conversion device, and is used to switch between the external video signal S and the internally generated signal S.
This is a switch for selecting one of 2 and 2, and on the terminal a side,
An external video signal Sl output from external video equipment such as a television or VTR is input, and the internally generated signal S2 output from the blank burst circuit 9 is input to the terminal side.

しかして、切換スイッチ10を端子す側に倒すとブラッ
クバースト回路9でいったん複合映像信号の形となった
前記内部発生信号Stが入力され。
When the selector switch 10 is turned to the terminal side, the internally generated signal St, which has once been in the form of a composite video signal, is input to the black burst circuit 9.

この内部発生信号S2は前記y−c分離回路5及び同期
分離回路6を介して、再びY信号7.クロマ信号8.同
期信号11の3つの信号に分離され。
This internally generated signal S2 is passed through the Y-C separation circuit 5 and the synchronous separation circuit 6 again to the Y signal 7. Chroma signal 8. The synchronization signal 11 is separated into three signals.

スーパーインポーズ回路3に入力される。このようにし
て、コンピュータ1からのRGB信号は。
The signal is input to the superimpose circuit 3. In this way, the RGB signals from computer 1.

内部同期による複合映像信号(ビデオ信号)に変換され
る。
Converted to a composite video signal (video signal) using internal synchronization.

(発明の効果) 以上述べたように2本発明によれば、内部同期と外部同
期との切換えが1つの切換スイッチを切換えることによ
りなされるので2回路の大幅な面素化が図れる。
(Effects of the Invention) As described above, according to the present invention, since switching between internal synchronization and external synchronization is performed by switching one changeover switch, it is possible to significantly reduce the area of two circuits.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は1本発明に係わる映像変換装置の実施例を示す
ブロック図、第2図は従来例を示すブロック図である。 1・・・コンピュータ  4・・・同期発生回路9・・
・ブランクバースト回路(変換回路)10・・・切換ス
イッチ
FIG. 1 is a block diagram showing an embodiment of a video conversion device according to the present invention, and FIG. 2 is a block diagram showing a conventional example. 1... Computer 4... Synchronization generation circuit 9...
・Blank burst circuit (conversion circuit) 10... selector switch

Claims (1)

【特許請求の範囲】 1)外部映像機器から入力される外部映像信号、この外
部映像信号とコンピュータからのRGB信号とをミキシ
ングした映像信号及び映像信号に変換した前記RGB信
号のいずれかを選択して出力する装置であって、 前記RGB信号を映像信号に変換するため に必要な各種信号を発生する同期発生回路と、これら各
種信号を複合映像信号の形に変換する変換回路とが設け
られ、 該変換回路の出力信号と前記外部映像信号 とが切換え入力されてなることを特徴とする映像変換装
置。
[Claims] 1) Select one of an external video signal input from an external video device, a video signal obtained by mixing this external video signal and an RGB signal from a computer, and the RGB signal converted into a video signal. The apparatus is provided with a synchronization generation circuit that generates various signals necessary for converting the RGB signal into a video signal, and a conversion circuit that converts these various signals into a composite video signal, A video conversion device characterized in that the output signal of the conversion circuit and the external video signal are switched and inputted.
JP60106373A 1985-05-17 1985-05-17 Image converter Pending JPS61264884A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60106373A JPS61264884A (en) 1985-05-17 1985-05-17 Image converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60106373A JPS61264884A (en) 1985-05-17 1985-05-17 Image converter

Publications (1)

Publication Number Publication Date
JPS61264884A true JPS61264884A (en) 1986-11-22

Family

ID=14431916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60106373A Pending JPS61264884A (en) 1985-05-17 1985-05-17 Image converter

Country Status (1)

Country Link
JP (1) JPS61264884A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6085694A (en) * 1983-10-17 1985-05-15 Sharp Corp Superimposing device
JPS6085687A (en) * 1983-10-17 1985-05-15 Sharp Corp Superimposing device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6085694A (en) * 1983-10-17 1985-05-15 Sharp Corp Superimposing device
JPS6085687A (en) * 1983-10-17 1985-05-15 Sharp Corp Superimposing device

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