JPS61124176U - - Google Patents
Info
- Publication number
- JPS61124176U JPS61124176U JP843385U JP843385U JPS61124176U JP S61124176 U JPS61124176 U JP S61124176U JP 843385 U JP843385 U JP 843385U JP 843385 U JP843385 U JP 843385U JP S61124176 U JPS61124176 U JP S61124176U
- Authority
- JP
- Japan
- Prior art keywords
- phase
- color
- video
- demodulation circuit
- horizontal scanning
- 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
- 238000010586 diagram Methods 0.000 description 4
- 230000010363 phase shift Effects 0.000 description 1
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は、従来の映像再生装置の色復調回路を
示すブロツク図、第２図は、第１図の回路の各部
の信号の状態を示すベクトル図、第３図は、本考
案の一実施例を示すブロツク図、第４図は、第３
図の各部の信号の状態を示すベクトル図である。
主要部分の符号の説明、６…１Ｈ遅延回路、７
…加算回路、８…減算回路、９…Ｂ‐Ｙ検波器、
１０…Ｒ‐Ｙ検波器、１５…移相回路。
FIG. 1 is a block diagram showing a color demodulation circuit of a conventional video playback device, FIG. 2 is a vector diagram showing signal states of each part of the circuit in FIG. 1, and FIG. 3 is an implementation of the present invention. A block diagram showing an example, FIG.
FIG. 3 is a vector diagram showing the state of signals in each part of the figure. Explanation of symbols of main parts, 6...1H delay circuit, 7
... Addition circuit, 8... Subtraction circuit, 9... BY detector,
10...RY detector, 15...phase shift circuit.
Claims (1)
水平走査期間おきに位相反転されたＰＡＬカラー
ビデオ信号によつて映像を再生する映像再生装置
の色復調回路であつて、前記搬送色信号の位相を
１水平走査期間おきに指令に応じた角度だけ進ま
せかつ前記位相を進ませない期間においては前記
位相を前記指令に応じた角度だけ遅らせる移相手
段を含み、前記移相手段の出力に含まれる色差信
号を復調することを特徴とする映像再生装置の色
復調回路。 one of the carrier color signals and one of the color burst signals
A color demodulation circuit of a video reproducing device that reproduces video using a PAL color video signal whose phase is inverted every horizontal scanning period, wherein the phase of the carrier color signal is changed by an angle according to a command every other horizontal scanning period. The video reproduction includes a phase shifting means for advancing the phase and delaying the phase by an angle according to the command during a period in which the phase is not advanced, and demodulating a color difference signal included in the output of the phase shifting means. Color demodulation circuit of the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP843385U JPS61124176U (en) | 1985-01-23 | 1985-01-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP843385U JPS61124176U (en) | 1985-01-23 | 1985-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61124176U true JPS61124176U (en) | 1986-08-05 |
Family
ID=30487712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP843385U Pending JPS61124176U (en) | 1985-01-23 | 1985-01-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61124176U (en) |
-
1985
- 1985-01-23 JP JP843385U patent/JPS61124176U/ja active Pending
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