JPH0266082U - - Google Patents
Info
- Publication number
- JPH0266082U JPH0266082U JP1989101731U JP10173189U JPH0266082U JP H0266082 U JPH0266082 U JP H0266082U JP 1989101731 U JP1989101731 U JP 1989101731U JP 10173189 U JP10173189 U JP 10173189U JP H0266082 U JPH0266082 U JP H0266082U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- color
- phase
- video
- signals
- 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.)
- Granted
Links
- 230000010363 phase shift Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/74—Circuits for processing colour signals for obtaining special effects
- H04N9/75—Chroma key
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/44—Colour synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
- H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter
Description
第１図は本考案に依る好ましい実施例の一つの
ブロツク回路図、第２図は本考案に依る色相選択
回路部の理想的な実施例の一つの回路図、第３図
は本考案に依る色相選択回路部を説明するための
色信号ベクトル表示図、第４図は第１図回路の各
部波形図、第５図は従来のクロマキー装置を説明
するための概略図である。
１０……色信号分離回路部、１１……バツフア
ー、１２……帯域通過フイルター、１３……クラ
ンプパルス発生器、１４……増幅器、１５……ブ
ランキングパルス発生器、１６……ブランキング
回路、２０……色同期回路部、２１……色同期ゲ
ートパルス発生器、２２……色同期ゲート回路、
２３……位相比較器、２４……増幅器、２５……
積分器、２６……電圧制御発振器、３０……色相
選択回路部、３１……第１段移相回路、３２……
第２段移相回路、３８……位相シフト手段、３４
……選択スイツチ手段、３５……位相調整手段、
３６……バツフアー、４０……位相検出回路部、
４１……位相比較器、４２……トラツプ回路、４
３……積分増幅器、４４……色飽和度選択手段、
４５……レベル比較器、４６……混合器。
FIG. 1 is a block circuit diagram of a preferred embodiment of the present invention, FIG. 2 is a circuit diagram of an ideal embodiment of a hue selection circuit according to the present invention, and FIG. 3 is a circuit diagram of an ideal embodiment of the hue selection circuit according to the present invention. A color signal vector display diagram for explaining the hue selection circuit section, FIG. 4 is a waveform diagram of each part of the circuit of FIG. 1, and FIG. 5 is a schematic diagram for explaining a conventional chromakey device. 10... Color signal separation circuit section, 11... Buffer, 12... Band pass filter, 13... Clamp pulse generator, 14... Amplifier, 15... Blanking pulse generator, 16... Blanking circuit, 20... Color synchronization circuit section, 21... Color synchronization gate pulse generator, 22... Color synchronization gate circuit,
23... Phase comparator, 24... Amplifier, 25...
Integrator, 26... Voltage controlled oscillator, 30... Hue selection circuit section, 31... First stage phase shift circuit, 32...
Second stage phase shift circuit, 38... Phase shift means, 34
... selection switch means, 35 ... phase adjustment means,
36... Buffer, 40... Phase detection circuit section,
41... Phase comparator, 42... Trap circuit, 4
3... Integrating amplifier, 44... Color saturation selection means,
45... Level comparator, 46... Mixer.
Claims (1)
して二つ以上の映像信号の中から一つの映像信号
を選択して映像信号を合成する映像信号編集装置
において、 一つのカラー映像信号から色信号を分離する色
信号分離回路部１０と、上記の色信号から色同期
信号を抜き出し同一の位相並びに周波数を持つ連
続的な色副搬送波信号を発生する色同期回路部２
０と、上記の色副搬送波信号及びこの信号から一
定の位相差を持つ、少くとも一つ以上の色副搬送
波信号を発生し、これらの信号の中から選択され
た信号の位相を調整し特定の色信号を選択する色
相選択回路部３０と、上記の色信号分離回路部１
０から出力される色信号と色相選択回路部３０に
おいて選択される特定の色信号の位相を比較し、
同一の位相の色信号が検出される時にクロマキー
信号を発生する位相検出回路部４０とからなつて
いることを特徴とする映像編集装置用のクロマキ
ー信号の発生器。 (2) 上記の色相選択回路部１０は入力される色
副搬送波信号及びこの信号と一定の位相差を持つ
、少くとも一つ以上の色副搬送波信号を出力する
位相シフト手段３３と、上記の色副搬送波信号の
中から一つを選択する選択スイツチ手段３，４と
、選択された色副搬送波信号の位相を調整し特定
の色信号を選択出力する位相調整手段３５とから
なつていることを特徴とする請求項第１項記載の
映像編集装置用のクロマキー信号の発生器。 (3) 上記の位相検出回路４０は、入力される２
信号の位相を比較し、同一の位相である時最大の
出力を発生する位相比較器４１と、上記の位相比
較器４１の出力を積分して得た直流を増幅出力す
る積分増幅器４３と、色飽和度に比例する既存信
号を出力する色飽和度選択手段４４と、上記の直
流レベルと既存信号のレベルを比較し、クロマキ
ー信号を発生するレベル比較器４５と、このクロ
マキー信号を同期信号と混合する混合器４６とか
らなつていることを特徴とする請求項第１項記載
の映像編集装置用のクロマキー信号の発生器。[Claims for Utility Model Registration] (1) A video signal editing device that selects one video signal from two or more video signals and synthesizes the video signals in response to a specific hue of one color video signal. , a color signal separation circuit unit 10 that separates a color signal from one color video signal, and a color synchronization circuit that extracts a color synchronization signal from the color signal and generates a continuous color subcarrier signal having the same phase and frequency. Circuit section 2
0, the above-mentioned color subcarrier signal, and at least one color subcarrier signal having a certain phase difference from this signal, and adjusting the phase of a signal selected from these signals to identify the color subcarrier signal. a hue selection circuit section 30 for selecting a color signal; and the color signal separation circuit section 1 described above.
Compare the phase of the color signal output from 0 and the specific color signal selected in the hue selection circuit section 30,
1. A chroma key signal generator for a video editing apparatus, comprising a phase detection circuit section 40 that generates a chroma key signal when color signals of the same phase are detected. (2) The hue selection circuit section 10 includes a phase shift means 33 for outputting an input color subcarrier signal and at least one color subcarrier signal having a certain phase difference with this signal; It consists of selection switch means 3, 4 for selecting one of the color subcarrier signals, and a phase adjustment means 35 for adjusting the phase of the selected color subcarrier signal and selectively outputting a specific color signal. 2. A chroma key signal generator for a video editing apparatus according to claim 1. (3) The above phase detection circuit 40 receives two input signals.
A phase comparator 41 that compares the phases of signals and generates the maximum output when the phases are the same, an integrating amplifier 43 that amplifies and outputs the DC obtained by integrating the output of the phase comparator 41, and a color A color saturation selection means 44 that outputs an existing signal proportional to the saturation level, a level comparator 45 that compares the above DC level with the level of the existing signal and generates a chroma key signal, and mixes this chroma key signal with a synchronization signal. 2. A chroma key signal generator for a video editing apparatus as claimed in claim 1, further comprising a mixer 46 for a video editing apparatus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880015212U KR910005363Y1 (en) | 1988-09-15 | 1988-09-15 | Chroma-key signal generator |
| KR1988-15212 | 1988-09-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0266082U true JPH0266082U (en) | 1990-05-18 |
| JPH0628861Y2 JPH0628861Y2 (en) | 1994-08-03 |
Family
ID=19279392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989101731U Expired - Lifetime JPH0628861Y2 (en) | 1988-09-15 | 1989-08-30 | Chroma key signal generator for video editing equipment |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0628861Y2 (en) |
| KR (1) | KR910005363Y1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315022A (en) * | 1976-07-27 | 1978-02-10 | Nec Corp | Chroma gate signal generator |
-
1988
- 1988-09-15 KR KR2019880015212U patent/KR910005363Y1/en not_active IP Right Cessation
-
1989
- 1989-08-30 JP JP1989101731U patent/JPH0628861Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315022A (en) * | 1976-07-27 | 1978-02-10 | Nec Corp | Chroma gate signal generator |
Also Published As
| Publication number | Publication date |
|---|---|
| KR910005363Y1 (en) | 1991-07-22 |
| JPH0628861Y2 (en) | 1994-08-03 |
| KR900007733U (en) | 1990-04-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |