KR920008835Y1 - Teletext tv - Google Patents
Teletext tv Download PDFInfo
- Publication number
- KR920008835Y1 KR920008835Y1 KR2019870008693U KR870008693U KR920008835Y1 KR 920008835 Y1 KR920008835 Y1 KR 920008835Y1 KR 2019870008693 U KR2019870008693 U KR 2019870008693U KR 870008693 U KR870008693 U KR 870008693U KR 920008835 Y1 KR920008835 Y1 KR 920008835Y1
- Authority
- KR
- South Korea
- Prior art keywords
- txt
- monostable multivibrator
- teletext
- channel
- gate
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/08—Separation of synchronising signals from picture signals
- H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
- H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
- H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
- H04N7/0882—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of character code signals, e.g. for teletext
Abstract
내용 없음.No content.
Description
제1도는 본 고안 장치의 적응부를 표시하기 위한 텔레텍스트 내장형 TV수상기의 블록 구성도.1 is a block diagram of a teletext embedded TV receiver for displaying an adaptation unit of the present invention device.
제2도는 본 고안 장치의 회로도.2 is a circuit diagram of the device of the present invention.
제3도의 (a)-(e)는 제2도 회로중 각 부분의 동작신호 파형도.(A)-(e) of FIG. 3 are operation signal waveform diagrams of respective parts of the circuit of FIG.
제4도는 제1도중 원격제어기용 중앙처리 장치의 동작 설명을 위한 플로우챠트.4 is a flowchart for explaining the operation of the central processing unit for the remote controller in FIG.
본 고안은 텔레텍스트(TXT : Teletext) 내장형 TV수상기용 수직동기 검출장치에 관한 것으로 특히, TV수상기의 국부키 변화를 수직동기 신호의 변화로 감지하여 텔레텍스트 디코더 내의 중앙처리장치에 채널 변경을 인식시키기 위한 수직동기 검출장치에 관한 것이다.The present invention relates to a vertical synchronization detection device for a teletext (TXT) built-in TV receiver. In particular, a channel change is recognized by the central processing unit in the teletext decoder by detecting a change in the local key of the television receiver as a change in the vertical synchronization signal. It relates to a vertical synchronous detection device for making.
종래에는 제1도중 TV회로부(a)에 텔레텍스트 디코더부(b)를 추가시킨 텔레텍스트 내장형 TV수상기가 있어 리모콘(14)에 설치된 TV/TXT 선택키를 누르게 되면 메이타 슬라이서(16)를 통하여 TXT 데이타 처리부(17)에 입력된 TXT데이타를 처리하고 PROM(20)에 의해서 TXT 데이타를 영상신호 발생부(18)에 의하여 TV동기에 맞추어 문자신호를 음극선관(8)에 표시하도록 되어 있으나, 이는 TXT 모드를 선택한후 리모콘(14)에서의 채널 상승, 하강 및 영상선택 스위치의 전환을 원격제어기용 중앙처리 장치(15)에서 인식할 수는 있으나 TV회로부(a)에 설치된 국부키(11)에서의 TV채널 상승, 하강 및 영상 및 조속 표시등의 기능 선택을 인식할 수가 없어 국부키(11)로 변경할 때 변경전 데이타에 의한 TXT영상신호가 표시되는 오동작이 발생되며 이러한 오동작은 방지하기 위해서 TXT 모드시에는 국부키(11)로 채널 변경을 못하게 하여야 하며, 채널 TXT 모드시에는 국부키(11)로 채널 변경을 못하게 하여야 하며, 채널 변경후의 오동작 발생을 방지하기 위해서는 리모콘(14)의 TV/TXT 선택기를 제차동작시켜야 하는 사용상 번거로운 문제점이 있었다.Conventionally, there is a teletext embedded TV receiver in which a teletext decoder unit (b) is added to the TV circuit unit (a) in the first diagram. When the TV / TXT selection key installed in the remote controller 14 is pressed, the meter slicer 16 is pressed. Although the text signal is displayed on the cathode ray tube 8 by processing the TXT data input to the TXT data processor 17 and synchronizing the TXT data by the video signal generator 18 by the PROM 20 to the TV synchronization. The local key 11 installed in the TV circuit unit (a) can be recognized by the central processing unit 15 for the remote controller after the TXT mode is selected and the channel up, down, and switching of the image selection switch on the remote controller 14 can be recognized. TV channel rising, falling, and the selection of the function of the image and the speed control indicators cannot be recognized. When changing to the local key 11, a malfunction occurs in which the TXT video signal is displayed by the data before the change. mother In case of channel TXT mode, the channel change should not be allowed, and in channel TXT mode, the channel change should not be allowed by the local key 11, and in order to prevent malfunction after the channel change, There is a problem in use that requires the selector to be operated again.
본 고안은 이러한 종래의 문제점을 해결하기 위하여 TXT 데이타 처리부의 수직동기 신호를 이용하여 단안정 멀리 바이브레이터가 수직동기 신호이 변화를 감시하도록 하므로서 TV국부키로 채널을 변경시키더라도 중앙처리 장치에 채널 변경을 인식시켜 항상 현재의 TXT영상신호가 표시되도록한 텔레텍스트 내장형 TV수상기용 수직동기 검출장치를 제공하는 것을 목적으로 하는 것을 목적으로 하는 것으로, 이하 첨부된 도면을 참조하여 본 고안을 상세히 설명하면 다음과 같다.In order to solve the above problems, the present invention uses the vertical synchronization signal of the TXT data processing unit so that the vibrator monitors the change of the vertical synchronization signal, so that the central processor recognizes the channel change even if the channel is changed with the TV local key. It is an object of the present invention to provide a vertical synchronization detection device for a teletext-embedded TV receiver so that the present TXT video signal is always displayed. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. .
제1도 및 제2도를 참조하면 본 고안 장치의 구성은 텔레텍스트 데이타 처리부(17)의 수직동기 출력(Vsyn)은 단안정 멀티바이브 레이터(101)의 입력단(A)에 연결함과 동시에 반전기(103, 104)로 구성된 지연부와 반전기(105)를 통하여 AND게이트(106)의 일측 입력단에 연결하고, 상기 단안정 멀티바이브레이터(101)의 출력단(Q)은 단안정 멀티바이브레이터(102)를 통하여 AND게이트(106)의 타측 입력단에 연결하며, AND게이트(106)의 출력단은 리모콘용 중앙처리장치(15)에 연결하여된 것으로서, 이러한 본 고안 장치의 작용효과를 제3도의 (a)-(e)를 참조하여 설명하면 다음과 같다.Referring to FIGS. 1 and 2, the device of the present invention is configured such that the vertical synchronous output V syn of the teletext data processing unit 17 is connected to the input terminal A of the monostable multivibrator 101. It is connected to an input terminal of one side of the AND gate 106 through a delay unit composed of the inverters (103, 104) and the inverter 105, and the output terminal (Q) of the monostable multivibrator 101 is a monostable multivibrator ( 102 is connected to the other input terminal of the AND gate 106, and the output terminal of the AND gate 106 is connected to the central processing unit 15 for the remote control. A description will be given below with reference to a)-(e).
TV동기와 TXT 영상신호 발생부(18)의 동기를 맞추기 위해서 TXT 데이타 처리부(17)에서 TXT영상신호 발생부(18)로 공급되는 수직 동기신호(Vsyn)(제3도의 (a)의 파형참조)를 단안정 멀티바이브레이터(101)의 입력단(A)에 인가하면 수직동기신호(Vsyn)의 후단변부(Edge)에서 단안정 멀티바이브레이터(101)의 시정수(T1)(여기에서 T1 Vsyn의 하이기간)만큼 지연된 파형(제3도의 (b)참조)이 발생되고, 채널이 변화되면 펄스폭이 길어지게 된다.In order to synchronize the TV synchronization with the TXT video signal generator 18, the waveform of the vertical synchronizing signal V syn supplied from the TXT data processor 17 to the TXT video signal generator 18 ( Fig . 3 (a)). Is applied to the input terminal A of the monostable multivibrator 101, the time constant T 1 of the monostable multivibrator 101 at the rear end edge of the vertical synchronizing signal V syn (where T 1 The waveform delayed by the high period of V syn (see (b) of FIG. 3) is generated, and the pulse width becomes longer when the channel is changed.
왜냐하면 채널 A와 채널 B의 수직동기는 다른 것으로 간주되기 때문이다. 단안정 멀티바이브레이터(101)의 출력단(Q)신호를 단안정 멀티바이브레이터(102)의 입력단(A)에 인가하면 단안정 멀티바이브레이터(102)의 시정수(T2)에 의하여 제3도의 (c)와 같은 신호 파형이 단안정 멀티바이브레이터(102)의 출력단(Q)에 나타난다. 여기에서 시정수(T2)는 수직동기신호(Vsyn)의 로우기간 보다 크거나 같다.This is because the vertical synchronization of channels A and B is considered different. When the output terminal Q signal of the monostable multivibrator 101 is applied to the input terminal A of the monostable multivibrator 102, the time constant T 2 of the monostable multivibrator 102 is adjusted according to FIG. A signal waveform such as) appears at the output terminal Q of the monostable multivibrator 102. Here, the time constant T 2 is greater than or equal to the low period of the vertical synchronization signal V syn .
이러한 단안정 멀티바이브레이터(102)의 출력단(Q)에 나타나는 신호는 단안정 멀티바이브레이터(101, 102)를 통과할때 전달 지연되므로 반전기(103, 104)로서된 지연부를 통과시켜 시간을 맞춘 다음 수직동기신호(Vsyn)를 반전기(105)로 반전시켜 그 출력을 멀티바이브레이터(102)의 출력단(Q) 신호와 함께 AND게이트(106)에 인가된다. 따라서 AND게이트(106)의 출력은 제3도의 (e)와 같이 되고 이것은 두개의 다른 동기를 갖는 채널 A에서 채널 B로 전환하였을 때 채널변화 감지용 펄스로서 제4도에 나타낸 바와같은 동작을 수행하는 완격제어기용 중앙처리장치(15)에 인가된다.Since the signal appearing at the output stage Q of the monostable multivibrator 102 passes the delay when it passes through the monostable multivibrator 101, 102, it is timed by passing the delay unit as the inverters 103 and 104. The vertical synchronizing signal V syn is inverted by the inverter 105 and its output is applied to the AND gate 106 together with the output terminal Q signal of the multivibrator 102. Therefore, the output of the AND gate 106 is as shown in (e) of FIG. 3, which performs an operation as shown in FIG. 4 as a channel change detection pulse when switching from channel A having two different synchronizations to channel B. Is applied to the central processing unit 15 for the complete controller.
또한 TXT 중앙처리장치(19)에 채널 변경을 알리는 리세트 데이타를 TXT 데이타 처리부(17)를 통하여 인가하므로서 TXT 중앙처리장치(19)는 채널 변경을 인식하고 채널 변화에 따른 여러가지 기능을 수행하게 된다.In addition, the TXT CPU 19 recognizes the channel change and performs various functions according to the channel change by applying reset data indicating the channel change to the TXT CPU 19 through the TXT data processor 17. .
따라서 종래의 국부키로 채널 변화시 발생되는 오동작을 방지할수가 있는 것이다.Therefore, it is possible to prevent a malfunction caused by a channel change with a conventional local key.
이상에서 설명한 바와같이 본 고안 장치에 의하면 TXT를 내장한 TV수상기에 있어 TV수상기부의 국부키로 채널을 변경하더라도 채널 변경을 TXT부에서 인지할 수가 있어 TXT부의 오동작을 사전에 방지할수가 있는 것이다.As described above, according to the device of the present invention, even if the channel is changed by the local key of the TV receiver in the TV receiver with the TXT, the channel change can be recognized by the TXT unit, thereby preventing the malfunction of the TXT unit in advance.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870008693U KR920008835Y1 (en) | 1987-05-30 | 1987-05-30 | Teletext tv |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870008693U KR920008835Y1 (en) | 1987-05-30 | 1987-05-30 | Teletext tv |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880022960U KR880022960U (en) | 1988-12-27 |
| KR920008835Y1 true KR920008835Y1 (en) | 1992-12-19 |
Family
ID=19263641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870008693U KR920008835Y1 (en) | 1987-05-30 | 1987-05-30 | Teletext tv |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR920008835Y1 (en) |
-
1987
- 1987-05-30 KR KR2019870008693U patent/KR920008835Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR880022960U (en) | 1988-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR970019593A (en) | System providing preliminary operations on auxiliary data decoders of television receivers | |
| KR100243799B1 (en) | Odd/even field detector for video signals | |
| KR860003735A (en) | TV receiver | |
| KR860006782A (en) | Non-standard video signal detector | |
| KR920008835Y1 (en) | Teletext tv | |
| KR910011006A (en) | Digital synchronizer | |
| KR930009441A (en) | Image signal processing circuit | |
| KR840008158A (en) | Synchronous Display | |
| KR0178214B1 (en) | Video signal distinguishing device in plasma display panel | |
| KR0145891B1 (en) | The integrated circuit for color signal process with system director | |
| KR910003623Y1 (en) | Conversion control circuit of teletext picture screen | |
| KR920004990Y1 (en) | Color-automatic conversion circuit for on screen display character | |
| KR0165763B1 (en) | Caption position information detecting apparatus | |
| KR100206784B1 (en) | Super impose apparatus and method of image instrument | |
| KR960011307B1 (en) | Sub-screen marking circuit | |
| JP2714221B2 (en) | Television system discriminator | |
| KR0137171Y1 (en) | Improved apparatus for processing the video signals in monitor | |
| KR920002988Y1 (en) | Data lime saperating signal generating circuit | |
| KR0169370B1 (en) | Signal process circuit of liquid crystal system for data enable signal priority process | |
| KR19980703637A (en) | Vertical synchronization signal detector | |
| KR100196834B1 (en) | Apparatus for distinguishing the video signal in pdp in tv | |
| KR100304891B1 (en) | Flat Panel Display System | |
| KR200151799Y1 (en) | Circuit for distinguishing image signal | |
| KR100294232B1 (en) | Apparatus detecting format of STB signal | |
| KR100197381B1 (en) | Apparatus for muting the video digital in pdp in tv |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| REGI | Registration of establishment | ||
| FPAY | Annual fee payment |
Payment date: 19941227 Year of fee payment: 4 |
|
| LAPS | Lapse due to unpaid annual fee |