JPH0191388U - - Google Patents
Info
- Publication number
- JPH0191388U JPH0191388U JP18722287U JP18722287U JPH0191388U JP H0191388 U JPH0191388 U JP H0191388U JP 18722287 U JP18722287 U JP 18722287U JP 18722287 U JP18722287 U JP 18722287U JP H0191388 U JPH0191388 U JP H0191388U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- pal
- secam
- circuit
- color
- 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 description 4
- 239000002131 composite material Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Color Television Systems (AREA)
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案のＰＡＬ及びＳＥＣＡＭ両方式
受信用カラーテレビジヨン受像機の復調回路を示
すブロツク図、第２図は第１図の遅延回路の遅延
時間特性を説明する説明図、第３図は第１図にお
けるＰＡＬモード時の輝度信号及び色信号の遅延
時間を説明する説明図、第４図は第１図における
ＳＥＣＡＭモード時の輝度信号及び色信号の遅延
時間を説明する説明図、第５図は従来のＰＡＬ及
びＳＥＣＡＭ両方式受信用カラーテレビジヨン受
像機の復調回路を示すブロツク図、第６図は第５
図におけるＰＡＬモード時の輝度信号及び色信号
の遅延時間を説明する説明図、第７図は第５図に
おけるＳＥＣＡＭモード時の輝度信号及び色信号
の遅延時間を説明する説明図である。
１１…複合映像信号入力端子、１２…遅延回路
、１３…色成分トラツプ、１４…輝度信号出力端
子、１５…ＳＥＣＡＭ―ＰＡＬ変換回路、１６…
ＰＡＬ復調器、１７…色信号出力端子、１８…切
換スイツチ。
FIG. 1 is a block diagram showing a demodulation circuit of a color television receiver for both PAL and SECAM reception according to the present invention, FIG. 2 is an explanatory diagram illustrating the delay time characteristics of the delay circuit shown in FIG. 1, and FIG. is an explanatory diagram explaining the delay time of the luminance signal and chrominance signal in the PAL mode in FIG. 1, FIG. 4 is an explanatory diagram illustrating the delay time of the luminance signal and chrominance signal in the SECAM mode in FIG. Figure 5 is a block diagram showing the demodulation circuit of a conventional color television receiver for both PAL and SECAM reception.
FIG. 7 is an explanatory diagram illustrating the delay time of the luminance signal and chrominance signal in the PAL mode in FIG. 5, and FIG. 7 is an explanatory diagram illustrating the delay time of the luminance signal and chrominance signal in the SECAM mode in FIG. 11... Composite video signal input terminal, 12... Delay circuit, 13... Color component trap, 14... Luminance signal output terminal, 15... SECAM-PAL conversion circuit, 16...
PAL demodulator, 17...color signal output terminal, 18...changeover switch.
Claims (1)
号から成る複合映像信号を入力する入力端子と、 この複合映像信号が入力として供給され、輝度
信号成分と色信号成分とで遅延時間を異にする群
遅延特性を有し、色信号の遅延時間は輝度信号の
遅延時間よりもＰＡＬ復調による遅延時間だけ短
く且つＳＥＣＡＭ―ＰＡＬ変換による遅延時間に
等しく設定された遅延回路と、 この遅延回路を通した複合映像信号から色信号
を除去し輝度信号だけを出力する回路と、 前記入力端子に入力されたＳＥＣＡＭ方式の複
合映像信号をＰＡＬ方式の信号に変換して出力す
るＳＥＣＡＭ―ＰＡＬ変換回路と、 ＰＡＬモード時には前記遅延回路からの信号を
選択し、ＳＥＣＡＭモード時には前記ＳＥＣＡＭ
―ＰＡＬ変換回路からの信号を選択して出力する
切換スイツチと、 この切換スイツチからのＰＡＬ方式の信号を色
復調し色信号として出力するＰＡＬ復調器とを具
備したことを特徴とするＰＡＬ及びＳＥＣＡＭ両
方式受信用カラーテレビジヨン受像機の復調回路
。[Claims for Utility Model Registration] An input terminal for inputting a composite video signal consisting of a PAL or SECAM color signal and a luminance signal; a delay circuit having group delay characteristics that vary in time, and in which the delay time of the chrominance signal is set to be shorter than the delay time of the luminance signal by the delay time due to PAL demodulation and equal to the delay time due to SECAM-PAL conversion; A circuit that removes the color signal from the composite video signal passed through the delay circuit and outputs only the luminance signal, and a SECAM-PAL circuit that converts the SECAM system composite video signal input to the input terminal into a PAL system signal and outputs it. a conversion circuit, and selects the signal from the delay circuit in PAL mode, and selects the signal from the SECAM in SECAM mode.
- A PAL and SECAM system characterized by comprising a changeover switch that selects and outputs a signal from a PAL conversion circuit, and a PAL demodulator that color demodulates the PAL signal from the changeover switch and outputs it as a color signal. Demodulation circuit for a color television receiver for dual-reception.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18722287U JPH0191388U (en) | 1987-12-10 | 1987-12-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18722287U JPH0191388U (en) | 1987-12-10 | 1987-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0191388U true JPH0191388U (en) | 1989-06-15 |
Family
ID=31478389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18722287U Pending JPH0191388U (en) | 1987-12-10 | 1987-12-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0191388U (en) |
-
1987
- 1987-12-10 JP JP18722287U patent/JPH0191388U/ja active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH11127448A (en) | Color difference signal converting circuit | |
| EP0459409B1 (en) | Video signal processing circuit for compressed picture insertion function of television receiver | |
| JPH0191388U (en) | ||
| DE3374641D1 (en) | Circuit and method with an analogous or digital delay line for decoding the chrominance signal in a pal or secam television system | |
| EP0364967A3 (en) | Luminance/chrominance signal separation circuit for pal color television signal | |
| JPS57164687A (en) | Double scanning image receiver | |
| JPS6233432Y2 (en) | ||
| JPH0744144Y2 (en) | Color television receiver | |
| JPS643279U (en) | ||
| JPS6133755Y2 (en) | ||
| GB1391549A (en) | Colour tv receivers | |
| JPS6387975U (en) | ||
| JPS57183196A (en) | Demodulating device for color signal | |
| JPH0273886U (en) | ||
| JPS6333282U (en) | ||
| JPS63117181U (en) | ||
| JPH0181088U (en) | ||
| JPS6215996A (en) | Signal conversion circuit | |
| JPH06141336A (en) | Decoder | |
| JPS63192793U (en) | ||
| JPS59143176U (en) | color television receiver | |
| JPH0382985U (en) | ||
| JPS6185967U (en) | ||
| JPH032787U (en) | ||
| JPH02103984U (en) |