KR900002297Y1 - Tuning and synchronizing generating circuits of teletext adapter - Google Patents
Tuning and synchronizing generating circuits of teletext adapter Download PDFInfo
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- KR900002297Y1 KR900002297Y1 KR2019870003822U KR870003822U KR900002297Y1 KR 900002297 Y1 KR900002297 Y1 KR 900002297Y1 KR 2019870003822 U KR2019870003822 U KR 2019870003822U KR 870003822 U KR870003822 U KR 870003822U KR 900002297 Y1 KR900002297 Y1 KR 900002297Y1
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- circuit
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- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
- H04N21/43072—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen of multiple content streams on the same device
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Systems (AREA)
Abstract
내용 없음.No content.
Description
제 1 도는 종래의 텔리텍스트 아댑터 회로.1 is a conventional teletext adapter circuit.
제 2 도는 본 고안인 튜닝 및 동기발생회로를 포함한 텔리텍스트 아댑터의 개략도.2 is a schematic diagram of a teletext adapter including the tuning and synchronization generating circuit of the present invention.
제 3 도는 제 2 도의 튜닝 및 동기발생회로의 상세한 회로도.3 is a detailed circuit diagram of the tuning and synchronization generating circuit of FIG.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 튜닝 및 동기발생회로 30 : 데이터 처리부10: tuning and synchronization generating circuit 30: data processing section
30; 비데오 스위치 40 : CRT 디스플레이30; Video Switch 40: CRT Display
본 고안은 하나의 어댑터(Adapter)만으로 텔레비젼 및 텔리텍스트(Teletext) 방송을 시청할 수 있도록 한 텔리텍스트 어댑터의 튜닝(Tunning) 및 동기신호 발생회로에 관한 것이다.The present invention relates to a tuning and synchronization signal generation circuit of a teletext adapter that enables one to watch television and teletext broadcasting with only one adapter.
제 1 도는 종래의 텔리텍스트 어댑터 회로도로서, 합성 영상신호(Vin)는 데이터 분리기(1)를 통해 데이터 수신기(2)에 인가되는데, 데이터 분리기(1)에서는 텔리텍스트 데이터가 추출되면서 데이터 수신기(2)를 거쳐 데이터 처리기(3)에 인가되고, 이 데이터 처리기(3)에 입력된 데이터는 다시 합성영상신호를 만들거나 또는 RGB 신호를 만들어 CRT 디스플레이(5)에 전송하는 시스템으로 구성된다.1 is a diagram of a conventional teletext adapter, in which a composite image signal Vin is applied to a data receiver 2 through a data separator 1, in which the teletext data is extracted and data receiver 2 is extracted. Is applied to the data processor 3, and the data inputted to the data processor 3 is composed of a system which again generates a composite video signal or generates an RGB signal and transmits it to the CRT display 5.
이와 같이 종래의 텔리텍스트 어댑터는 합성영상신호만을 단일하게 처리하여 디스플레이하기 때문에 텔레비젼 또는 텔리텍스트 방송을 시청하려면 이에 따른 특정 텔레비젼 이나 합성영상신호를 출력으로 갖는 또 다른 어댑터를 필요로 하는 결점이 있었다.As described above, since the conventional teletext adapter processes and displays only a composite video signal, there is a drawback in that a television or teletext broadcast requires another adapter having a specific television or composite video signal as an output.
따라서, 본 고안의 목적은 상기한 결점을 해결하기 위해 안출한 것으로서, 안테나로부터 수신되는 합성영상 신호를 만들고, 이를 이용하여 텔리텍스트 데이터 처리에 기준이 되는 합성동기신호는 PLL(Phase Locked Loop)을 이용하여 만들어서 합성영상신호와 함께 텔리텍스트 데이터 처리부로 전송하므로써 텔레비젼 및 텔리텍스트 방송을 시청할 수 있는 다기능의 어댑터 회로를 제공하는데 있다.Accordingly, an object of the present invention is to solve the above-described drawbacks, and to generate a composite image signal received from an antenna, and using the synthesized synchronization signal as a reference for processing teletext data, a PLL (Phase Locked Loop) is used. The present invention provides a multifunctional adapter circuit that can watch television and teletext broadcast by transmitting the composite video signal to the teletext data processor.
이하 제 2 도와 제 3 도에 도시한 본 고안에 의거하여 실시예를 상술한다.Hereinafter, embodiments will be described in detail based on the present invention shown in FIGS. 2 and 3.
제 2 도에서, 본 고안의 튜닝 및 동기발생회로(10)와 데이터 처리부(20)와 비데오 스위치(30) 및 CRT 디스플레이(40)로 구성되는데, 수직귀선기간에 텔리텍스트 데이터를 포함한 방속국의 텔레비젼 신호(RF)를 인가하는 튜닝 및 동기발생회로(10)는 합성영상신호와 텔리텍스트 합성신호를 검출하고, 이 두 신호를 인가하는 데이터 처리부(20)는 데이터를 처리하여 CRT 디스플레이(40)에 인가하며, 상기한 합성영상신호는 비데오 스위치(30)이 전환에 의해 바이패스(Bypass)되게 연결되어 있다.2, the tuning and synchronization generating circuit 10, the data processing unit 20, the video switch 30, and the CRT display 40 of the present invention are constructed. The television of the broadcasting station including the teletext data in the vertical retrace period is shown. The tuning and synchronization generating circuit 10 for applying the signal RF detects the composite video signal and the teletext composite signal, and the data processing unit 20 for applying the two signals processes the data to the CRT display 40. The composite video signal is connected to the video switch 30 by bypass by switching.
상기한 회로구성에서 튜닝 및 동기발생회로(10)의 상세한 회로도는 제 3 도에 도시되어 있다.A detailed circuit diagram of the tuning and synchronization generating circuit 10 in the above circuit configuration is shown in FIG.
제 3 도에 있어서, 원격제어신호(RCS)를 인가하는 FS 마이크로 컴퓨터(13)는 모드스위치(12)에 의해 전환되는 방송모드신호에 따라 채널 밴드의 제어신호를 출력하여 밴드 선택 회로(14)에 인가되고, 수직귀선기간에 텔리텍스트 데이터를 포함한 텔레비젼 신호(RF)를 인가하는 튜너회로(11)는 상기한 밴드선택회로(14)와 마이크로 컴퓨터(13)의 출력신호를 인가하여 방송 채널을 선택하며, 이 튜너회로(11)의 출력신호는 중간주파수로서 중간주파증폭 및 검파회로(15)에 입력되게 연결한다.3, the FS microcomputer 13, which applies the remote control signal RCS, outputs a control signal of the channel band in accordance with the broadcast mode signal switched by the mode switch 12 so as to output the band selection circuit 14. The tuner circuit 11, which is applied to the television signal RF including the teletext data in the vertical retrace period, applies the output signals of the band selection circuit 14 and the microcomputer 13 to establish a broadcast channel. The output signal of this tuner circuit 11 is connected to the intermediate frequency amplification and detection circuit 15 as an intermediate frequency.
그리고, 상기한 중간주파증폭 및 검파회로(15)는 베이스 밴드(Base band)의 영상신호와 음성신호 및 텔리텍스트 데이터를 출력하는데, 이 출력신호 중 영상신호는 데이터 처리(20)와 비데오 스위치(30)에 인가되고, 음성신호는 FM(Frequency Modulation) 검파하는 오디오 검파회로(16)에 인가되며, 또한 오디오 검파회로(16)는 데이터 처리부(20)의 텔리텍스트 에러 신호음을 인가한다.The intermediate frequency amplification and detection circuit 15 outputs a baseband video signal, an audio signal, and teletext data. The video signal of the output signal includes a data processing 20 and a video switch ( 30), the audio signal is applied to the audio detection circuit 16 for detecting FM (Frequency Modulation), and the audio detection circuit 16 applies a teletext error signal sound of the data processing unit 20.
상기한 중간주파증폭 및 검파회로(15)에서 출력된 영상신호는 인가하는 PLL(17)은 합성동기신호를 출력하여서 수직기간 검출회로(18)를 통해 합성동기신호 발생기(19)에 인가되고, 이 합성동기신호 발생기(19)는 수직기간 검출회로(18)가 수평동기신호를 카운트하여 발생되는 제어신호에 의해 텔리텍스트 합성신호를 출력하려 데이터 처리부(20)로 인가되게 구성한다.The PLL 17 to which the image signal output from the intermediate frequency amplification and detection circuit 15 is applied outputs a synthesized synchronization signal and is applied to the synthesis synchronization signal generator 19 through the vertical period detection circuit 18. The synthesized synchronous signal generator 19 is configured such that the vertical period detection circuit 18 is applied to the data processor 20 to output the teletext synthesized signal by the control signal generated by counting the horizontal synchronous signal.
이와 같은 구성에서, 수직귀선기간에 텔리텍스트 데이터를 포함한 텔레비죤 신호(RF)는 튜너회로(11)에 인가되는데, 원격제어신호(RCS)에 의해 제어되는 FS 마이크로 컴퓨터(13)는 텔레비죤 또는 유선 텔레비죤의 방송모드를 전환하는 모드스위치(12)에 의해서 모드가 선택되어 원하는 채널의 밴드를 결정하는 제어신호를 출력하고 밴드선택회로(14)는 밴드결정의 제어신호를 인가하여서 선택된 밴드의 주파수 범위에 따른 전압을 출력하여 튜너회로(11)에 인가한다.In such a configuration, the television signal RF including the teletext data in the vertical retrace period is applied to the tuner circuit 11, and the FS microcomputer 13 controlled by the remote control signal RCS is a television or wired television. The mode is selected by the mode switch 12 for switching the broadcast mode of the signal, and a control signal for determining a band of a desired channel is output. The band selection circuit 14 applies a control signal for band determination to the frequency range of the selected band. The voltage according to the output is applied to the tuner circuit 11.
이에 따라, 튜너회로(11)는 텔레비죤 신호(RF)와 밴드선택회로(14)의 출력전압 및 FS 마이크로컴퓨터(13)의 일채널 튜닝(Tuning) 전압을 인가하여서 채널을 선택한다.Accordingly, the tuner circuit 11 selects a channel by applying the television signal RF and the output voltage of the band selection circuit 14 and the one-channel tuning voltage of the FS microcomputer 13.
상기한 튜너회로(11)에서 선택된 채널에 대응하는 신호는 중간주파수로 변환되어 중간주파증폭 및 검파회로(15)에 인가됨에 따라 중간주파증폭 및 검파회로(15)에서는 밴드의 영상신호와 음성신호 및 텔리텍스트 데이터를 출력하는데, 이 신호 중 영상신호는 데이터 처리부(20)의 비데오 스위치(30)에 인가되므로써 텔리텍스트 데이터를 검출하는데 이용되거나 또는 비데오 스위치(30)에 의해 바이패스(Bypass)되고, 음성신호는 오디오 검파회로(16)에 인가되어 FM 검파됨에 따라 텔레비죤 음성신호가 출력되며, 이 오디오 검파회로(16)는 또한 텔리텍스트 데이터를 인가하여 처리하는 데이터 처리부(20)에서 발생되는 텔리텍스트 에러신호음을 인가하여 비프(Beep)음을 출력한다.As the signal corresponding to the channel selected by the tuner circuit 11 is converted into an intermediate frequency and applied to the intermediate frequency amplifier and the detection circuit 15, the intermediate frequency amplifier and the detection circuit 15 in the band video signal and audio signal And outputs the teletext data, of which an image signal is used to detect the teletext data by being applied to the video switch 30 of the data processing unit 20 or bypassed by the video switch 30. When the audio signal is applied to the audio detection circuit 16 and the FM is detected, a television voice signal is outputted. The audio detection circuit 16 also generates a signal generated by the data processing unit 20 that applies and processes the teletext data. A text error beep is applied to output a beep sound.
상기한 중간주파증폭 및 검파회로(15)에서 출력되는 신호중 영상신호를 인가하는 PLL(17)은 합성동기신호를 출력하는데, 이 합성동기신호는 비데오 스위치(30)에 인가되고, 합성동기신호중 수평동기신호가 수직기간 검출회로(18)에 인가되므로써 이 수직기간 검출회로(18)는 수평동기신호를 카운트하여 합성동기신호 발생기(19)를 제어한다.The PLL 17, which applies an image signal among the signals output from the intermediate frequency amplification and detection circuit 15, outputs a synthetic synchronous signal. The synthetic synchronous signal is applied to the video switch 30. The synchronizing signal is applied to the vertical period detecting circuit 18 so that the vertical period detecting circuit 18 counts the horizontal synchronizing signal to control the synthesized synchronizing signal generator 19.
따라서, 합성동기 신호발생기(19)는 데이터 처리부(20)에서 필요로 하는 텔리텍스트 합성동기신호를 출력하고, 이 신호는 다시 PLL(17)으로 궤환된다.Therefore, the synchronizing synchronization signal generator 19 outputs the teletext synthesis synchronizing signal required by the data processing unit 20, and this signal is fed back to the PLL 17.
그리고, 중간주파증폭 및 검파회로(15)는 안테나에 수신되는 입력신호의 레벨이 변동하더라도 이를 자동적으로 제어하기 위해 튜너회로(11)에 자동이득 제어신호가 인가되게 하고, 또한 FS 마이크로 컴퓨터(13)에는 정확한 튜닝이 자동적으로 제어되게 AFT(Auto Fine Tuning) 신호가 인가되게 한다.In addition, the intermediate frequency amplifier and detection circuit 15 allows an automatic gain control signal to be applied to the tuner circuit 11 to automatically control the level of the input signal received by the antenna, and also to the FS microcomputer 13. ), The AFT (Auto Fine Tuning) signal is applied so that accurate tuning is controlled automatically.
이상과 같이 본 고안에 의하면 텔리텍스트 어댑터의 국부적인 기능을 확장하여 안테나로부터 직접 신호를 받아 텔리텍스트 데이터를 처리할 수 있게 하므로써 텔레비죤 및 텔리텍스트 방송을 시청할 수 있다.As described above, according to the present invention, it is possible to watch television and teletext broadcasting by extending the local function of the teletext adapter to receive the signal directly from the antenna and process the teletext data.
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KR2019870003822U KR900002297Y1 (en) | 1987-03-25 | 1987-03-25 | Tuning and synchronizing generating circuits of teletext adapter |
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KR2019870003822U KR900002297Y1 (en) | 1987-03-25 | 1987-03-25 | Tuning and synchronizing generating circuits of teletext adapter |
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KR880018735U KR880018735U (en) | 1988-10-29 |
KR900002297Y1 true KR900002297Y1 (en) | 1990-03-17 |
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KR2019870003822U KR900002297Y1 (en) | 1987-03-25 | 1987-03-25 | Tuning and synchronizing generating circuits of teletext adapter |
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