JPS62296693A - Video signal processor - Google Patents
Video signal processorInfo
- Publication number
- JPS62296693A JPS62296693A JP61140751A JP14075186A JPS62296693A JP S62296693 A JPS62296693 A JP S62296693A JP 61140751 A JP61140751 A JP 61140751A JP 14075186 A JP14075186 A JP 14075186A JP S62296693 A JPS62296693 A JP S62296693A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- video signal
- vtr
- output
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 230000008929 regeneration Effects 0.000 claims 2
- 238000011069 regeneration method Methods 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 239000003086 colorant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
3、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(/VTR)などの低域
変換方式で記録された映像信号を再生して、別の映像信
号と合せて信号処理を行う映像信号処理装置に関するも
のである。[Detailed Description of the Invention] 3. Detailed Description of the Invention Industrial Application Field The present invention reproduces a video signal recorded by a low frequency conversion method such as a video tape recorder (/VTR), and converts it into another video signal. The present invention relates to a video signal processing device that also performs signal processing.
従来の技術
従来の一般的な信号処理装置は第4図のような構成にな
っている。入力端子10から入った映像信号は復調器6
1で復調され、輝度信号Yl、色差信号11.Qlの各
信号とする。また、VRT9の出力も復調器62で復調
され、輝度信号Y21色差信号12.Q2の各信号とし
、信号処理部7にそれぞれ入力され、例えば、一方の信
号の時間軸を縮めて、画面上で見て縮小し、他方にはめ
こむような処理を行った後、その出力Y3.+3.Q3
は変調器8で変調され、複合カラー映像信号となる。2. Description of the Related Art A conventional general signal processing device has a configuration as shown in FIG. The video signal input from the input terminal 10 is sent to the demodulator 6
1, and a luminance signal Yl, a color difference signal 11. Let each signal be Ql. Further, the output of the VRT9 is also demodulated by the demodulator 62, and the luminance signal Y21 color difference signal 12. Each signal of Q2 is inputted to the signal processing unit 7, and after performing processing such as, for example, shortening the time axis of one signal, reducing it when viewed on the screen, and fitting it into the other signal, the output Y3 .. +3. Q3
is modulated by a modulator 8 to become a composite color video signal.
発明が解決しようとする問題点
このような従来の装置では、復調器や変調器が必要なう
え、それに伴う信号の劣化が避けられない。Problems to be Solved by the Invention In such conventional devices, a demodulator and a modulator are required, and signal deterioration associated with the demodulators and modulators is unavoidable.
本発明は、かかる点に鑑みてなされたもので、復調器や
変調器がいらない簡単な構成で、信号処理を行う映像信
号処理装置を捉供することを目的としている。The present invention has been made in view of this point, and an object of the present invention is to provide a video signal processing device that performs signal processing with a simple configuration that does not require a demodulator or a modulator.
問題点を解決するための手段
本発明は」二足問題点を解決するため、入力映像信号の
カラーバーストから連続の色副搬送波を得て、それをV
TRの信号処理回路の基準伏目とずることによって、V
TRの出力と入力映像信号の、両信号のカラーバースト
の位相を合せることにより、信号処理自体を容易にする
ものである。Means for Solving the Problem In order to solve the two-legged problem, the present invention obtains a continuous color subcarrier from a color burst of an input video signal and converts it into a V
By shifting from the standard foreclosure of the signal processing circuit of the TR, V
By matching the phases of the color bursts of the output of the TR and the input video signal, the signal processing itself is facilitated.
作用
本発明は上記した構成によって、VTRの再生信号と入
力映像信号の色副搬送波の位相が合うので、容易に信号
処理を行うことができる。According to the present invention, with the above-described configuration, the phase of the color subcarrier of the VTR reproduction signal and the input video signal match, so that signal processing can be easily performed.
実施例
以下に本発明の映像信号処理装置の一実施例について、
図面を用いて説明する。Embodiment An embodiment of the video signal processing device of the present invention will be described below.
This will be explained using drawings.
第1図は本発明の映像信号処理装置の一実施例を示すブ
ロック図である。FIG. 1 is a block diagram showing an embodiment of the video signal processing device of the present invention.
まず、VTR2の内部を簡単に説明する。テープに記録
されている信号は、再生ヘソl”2Iで再生され、プリ
アンプ22で増幅される。その出力は低域通過フィルタ
(LPF)26および、高域通過フィルタ(HPF)2
3によって、それぞれ低域変換色信号と、周波数変調さ
れた輝度信号に分け、低域変換色信号は色信号処理回路
27で元の色副搬送波の色信号に戻し、周波数変調され
た輝度信号は、輝度信号処理回路24でFM復調され、
加算器25で色信号と合せて元の映像信号となるのであ
る。First, the inside of the VTR 2 will be briefly explained. The signal recorded on the tape is reproduced by a reproducing device 1"2I and amplified by a preamplifier 22. Its output is passed through a low pass filter (LPF) 26 and a high pass filter (HPF) 2.
3, each is divided into a low frequency converted color signal and a frequency modulated luminance signal, the low frequency converted color signal is returned to the original color signal of the color subcarrier in the color signal processing circuit 27, and the frequency modulated luminance signal is , FM demodulated by the luminance signal processing circuit 24,
The adder 25 adds the color signal to the original video signal.
入力端子4から入った映像信号は、色同期部1によって
カラーバースI・から連続の色副搬送波を得る。この色
副搬送波はVTR2の色信号処理回路27の基準信号と
なるので、VTR2の出力すなわち再生映像信号のカラ
ーバーストは人力映像信号のそれと同じとなる。The video signal inputted from the input terminal 4 receives continuous color subcarriers from the color berth I by the color synchronization section 1. Since this color subcarrier becomes a reference signal for the color signal processing circuit 27 of the VTR 2, the output of the VTR 2, that is, the color burst of the reproduced video signal is the same as that of the human video signal.
色信号処理回路は、一般にAPCと呼ばれる帰還ループ
で構成され、低域変換色信号は、APCによって周波数
変換され、その際に、カラーバーストは入力基準信号(
一般には、固定発振器)の位相に合うように制御される
。従って、VTRなどのように、ジッタ成分を伴った色
信号でもAPCによって、カラーバーストの位相が安定
化され、正しい色が再生されるのである。これについて
は、特公昭50−14852号公報などで詳しく説明さ
れている。The color signal processing circuit generally consists of a feedback loop called APC, and the low frequency converted color signal is frequency converted by the APC, and at this time, the color burst is converted to the input reference signal (
Generally, it is controlled to match the phase of a fixed oscillator). Therefore, even if a color signal is accompanied by a jitter component, such as in a VTR, the phase of the color burst is stabilized by APC, and correct colors are reproduced. This is explained in detail in Japanese Patent Publication No. 50-14852.
VTR2の出力と入力映像信号は信号処理部3に入力さ
れ、例えば第2図(B)に示すようにVTR2の出力を
画面上で縮小して、同図(A)で示す入力映像信号の中
にはめこむような処理を受け、出力端子5にその出力が
得られる。The output of the VTR 2 and the input video signal are input to the signal processing section 3, and the output of the VTR 2 is reduced on the screen as shown in FIG. 2(B), and the input video signal shown in FIG. The output terminal 5 receives an output from the output terminal 5.
同図(L)で示す走査線1本を第3図に示すが、この場
合に、色信号の基準は人力映像信号(A)のカラーバー
スト(C)であるから、もし、VTR2の出力(B)の
色副搬送波の位相が入力映像信号(A)のそれと異なる
場合は、VTR2の出力(B)の部分は正しい色がつか
ないのであるが、前述のように色同期部1とVTR2内
の色信号処理回路27によって、入力映像信号(A)と
VTR2の出力(B)のカラーバーストの位相を合せで
あるので、VTR2の出力(B)の部分も正しい色がつ
くのである。One scanning line indicated by (L) in the figure is shown in FIG. If the phase of the color subcarrier of B) is different from that of the input video signal (A), the output (B) part of the VTR2 will not have the correct color. Since the phase of the input video signal (A) and the color burst of the output (B) of the VTR 2 are matched by the color signal processing circuit 27, the correct color is also applied to the output (B) of the VTR 2.
発明の効果
以上述べてきたように、本発明によれば、きわめて簡単
な構成で、低域変換式のVTRの再生信号と入力映像信
号を合せて信号処理を行うことができ、実用的に、きわ
めて有用である。Effects of the Invention As described above, according to the present invention, it is possible to perform signal processing by combining the playback signal of a low-frequency conversion VTR and the input video signal with an extremely simple configuration. Extremely useful.
第1図は、本発明の一実施例における映像信号処理装置
を示すブロック構成図、第2図は映像信号の画面構成を
示す説明図、第3図は第2Mの走査線一本分の信号を示
す波形図、第4図は従来の映像信号処理装置を示すブロ
ック構成図である。
1・・・・・・色同期部、2・・・・・・VTR,27
・・・・・・VTRの色信号処理回路、3・・・・・・
信号処理部。FIG. 1 is a block configuration diagram showing a video signal processing device in an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the screen configuration of video signals, and FIG. 3 is a signal for one 2M scanning line. FIG. 4 is a block diagram showing a conventional video signal processing device. 1...Color synchronization section, 2...VTR, 27
...VTR color signal processing circuit, 3...
Signal processing section.
Claims (1)
送波を得る色同期部と、低域変換方式の映像信号再生回
路の色信号処理回路の基準信号として前記色副搬送波を
用い、前記映像信号再生回路の出力と、前記入力複合カ
ラー映像信号とを合せて信号処理を行う映像信号処理装
置。a color synchronization unit that obtains continuous color subcarriers from a color burst of a composite color video signal; and a video signal regeneration circuit that uses the color subcarriers as a reference signal for a color signal processing circuit of a low-pass conversion type video signal regeneration circuit; A video signal processing device that performs signal processing on the output of the input composite color video signal and the input composite color video signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61140751A JPS62296693A (en) | 1986-06-17 | 1986-06-17 | Video signal processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61140751A JPS62296693A (en) | 1986-06-17 | 1986-06-17 | Video signal processor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS62296693A true JPS62296693A (en) | 1987-12-23 |
Family
ID=15275886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61140751A Pending JPS62296693A (en) | 1986-06-17 | 1986-06-17 | Video signal processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS62296693A (en) |
-
1986
- 1986-06-17 JP JP61140751A patent/JPS62296693A/en active Pending
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