KR950006449B1 - Automatic sub-adjustment method and device for TV - Google Patents
Automatic sub-adjustment method and device for TV Download PDFInfo
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- KR950006449B1 KR950006449B1 KR1019920021022A KR920021022A KR950006449B1 KR 950006449 B1 KR950006449 B1 KR 950006449B1 KR 1019920021022 A KR1019920021022 A KR 1019920021022A KR 920021022 A KR920021022 A KR 920021022A KR 950006449 B1 KR950006449 B1 KR 950006449B1
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- 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
- H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
- H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
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Abstract
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Description
제1도는 종래 텔레비젼의 PIP처리를 설명하기 위한 블럭도.1 is a block diagram for explaining a PIP process of a conventional television.
제2도는 본 발명의 부화면 자동 미세 조정을 실시하기 위한 블럭도.2 is a block diagram for performing sub-screen automatic fine adjustment of the present invention.
제3도는 본 발명의 자동 미세 조정 전압과 OP앰프의 출력관계를 설명하기 위한 파형도 및 도표.3 is a waveform diagram and diagram for explaining the output relationship between the automatic fine adjustment voltage and the OP amplifier of the present invention.
제4도는 본 발명에 따른 플로우 챠트.4 is a flow chart according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 주화면 튜너 2 : 주화면 IF처리부1: Main screen tuner 2: Main screen IF processing unit
3 : CPT 4 : 크로마부3: CPT 4: Chroma part
5 : 부화면 처리부 6 : 키 매트릭스5: sub-screen processing unit 6: key matrix
7 : 마이컴 8 : 부화면 튜너7: micom 8: sub-screen tuner
9 : 부화면 IF처리부 10 : 동기 검출부9: Sub picture IF processing unit 10: Sync detection unit
11 : 자동미세 조정 전압 검출부11: automatic fine adjustment voltage detector
본 발명은 텔레비젼의 부화면(PIP : picture in picture)에 관한 것으로 특히 부하면 온시나 채널 전환시 부화면 자체의 자동 미세 조정(AFT : Automatic Fine Tuning)을 수행하도록 하여 최적의 화질을 제공하기에 적당하도록 한 텔레비젼이 부화면 자동 미세 조정 방법 및 장치에 관한 것이다.The present invention relates to a picture in picture (PIP) of a television, and in particular, to provide an optimum picture quality by performing automatic fine tuning (AFT) of the sub picture itself at on or channel switching. A television, which is suitably adapted, relates to a method and an apparatus for automatic sub-adjustment.
종래 텔레비젼의 부화면 처리를 수행하기 위한 구성은 제1도에 도시된 바와 같이 안테나(ANT)를 통해 들어온 신호중 필요한 신호만 동조하기 위한 (주화면)튜너(1)와, 튜너(1)에서 공급된 연상 IF(중간주파수) 및 색부 반송파를 광대역으로 증폭시키고 음성 IF 및 인접 채널 신호를 감쇠시키며 음성신호와 영상신호 및 자동 미세 조정 신호를 분리시키는(주화면) IF처리부(2)와, IF처리부(2)로부터 영상신호를 입력받아 R.G.B색신호를 조합하여 CPT(3)를 통해 색화상을 재현시키는 크로마부(4)와, IF처리부(2)로부터 영상신호를 입력받아 부화면 신호를 크로마부(4)에 입력시키므로 부화면이 이루어지도록 처리하는 부화면 처리부(5)와, 원하는 제어 신호를 입력시키기 위한 키 매트릭스(6)와, 키 매트릭스(6)의 입력신호에 따라 동작하며 자동 미세 조정을 실시하여 튜너(1)와 크로마부(4)를 제어하는 마이컴(7)을 포함하여서 구성된다.As shown in FIG. 1, a configuration for performing sub-screen processing of a conventional television is provided with a (main screen) tuner 1 and a tuner 1 for tuning only necessary signals among the signals input through the antenna ANT as shown in FIG. IF processor (2), which amplifies the associative IF (intermediate frequency) and color carriers in a wide band, attenuates voice IF and adjacent channel signals, and separates audio signals from video signals and automatic fine tuning signals (main picture) (2) a chroma unit (4) for receiving a video signal from a combination of RGB color signals and reproducing a color image through the CPT (3); and receiving a video signal from the IF processor (2) and converting a sub-screen signal into a chroma unit ( 4) the sub-screen processing section 5 which processes the sub-picture to be made, the key matrix 6 for inputting the desired control signal, and the input signal of the key matrix 6, and performs automatic fine adjustment. Conducting tuner (1) and the microcomputer 7 which controls the chroma part 4, and is comprised.
이와같은 구성된 종래의 동작을 살펴보면 키 매트릭스(6)로부터 채널 선택신호가 입력될때 마이컴(7)에서 PLL데이타를 튜너(1)로 보내므로 튜버(1)에서는 튜닝된 신호를 IF처리부(2)로 보내게 된다.Referring to the conventional operation configured as described above, when the channel selection signal is input from the key matrix 6, the microcomputer 7 sends the PLL data to the tuner 1, so that the tuner 1 sends the tuned signal to the IF processor 2. Will be sent.
또한, 마이컴(7)에서는 내부 카운터와 A/D콘버터를 이용하여 자동 미세 조정을 실시하는데 이때 키 매트릭스(6)로부터 부화면 온 키가 마이컴(7)으로 입력되면 IF처리부(2)에서 출력되는 영상신호가 부화면 처리부(5)를 거쳐 크로마부(4)에 입력되므로 CPT(3)를 통한 화면에 부하면이 디스플레이된다.In addition, the microcomputer 7 performs an automatic fine adjustment using an internal counter and an A / D converter. When the sub-screen on key is input to the microcomputer 7 from the key matrix 6, the microcomputer 7 is output from the IF processor 2. Since the video signal is input to the chroma unit 4 via the sub-screen processing unit 5, the image signal is displayed on the screen through the CPT 3.
그러나, 상기와 같은 종래의 부화면 신호 처리시 주화면의 텔레비젼 신호를 이용하여 부화면을 실시하므로 부화면 자체의 자동 미세 조정이 이루어지지 않아 부화면이 선명하지 않게 되는 결점이 있다.However, since the sub-screen is performed using the television signal of the main screen in the conventional sub-screen signal processing as described above, there is a drawback that the sub-screen itself is not automatically fine-adjusted and the sub-screen is not clear.
또한, 주화면용 튜너와 부화면용 튜너를 갖는 2튜너 부화면 시스템에서는 부화면 자체의 자동 미세 조정을 실시하기 위하여 마이컴(7)외부에 별도의 회로를 구성하여야 하므로 회로 구성이 복잡해지고 원가가 상승하게 되는 결점이 있다.In addition, in the two-tuner sub-screen system having a main screen tuner and a sub-screen tuner, a separate circuit must be configured outside the microcomputer 7 in order to perform automatic fine adjustment of the sub screen itself. There is a flaw that rises.
본 발명은 이와같은 종래의 제반 결점을 해결하기 위한 것으로 주화면과 별도로 부화면을 자동 미세 조정할 수 있는 방법 및 장치를 제공하는데 그 목적이 있다.The present invention has been made to solve the above-mentioned general drawbacks and to provide a method and apparatus for automatically fine-tuning a sub-screen separately from the main screen.
이와같은 목적을 달성하기 위한 본 발명의 특징은 기존의 회로구성에 OP앰프를 이용한 자동 조정 전압 검출부와 저대역 필터를 이용한 동기 검출부를 포함시키고 마이컴의 입력단자를 이용하여 자동 미세 조정을 실시하도록 구성하는데 있다.A feature of the present invention for achieving the above object is to include an automatic adjustment voltage detection unit using an OP amplifier and a synchronization detection unit using a low-band filter in the existing circuit configuration and to perform automatic fine adjustment using the input terminal of the microcomputer It is.
이하, 본 발명의 실시예를 첨부된 도면을 참조로하여 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
제2도는 본 발명의 자동 미세 조정을 실시하기 위한 구성도로 기본적인 구성은 제1도와 같아 동일 부분에 대하여는 동일 부호를 사용하며 동작설명을 생략한다.2 is a block diagram for performing automatic fine adjustment according to the present invention. The basic configuration is the same as that in FIG.
본 발명은 마이컴(7)으로부터 부화면 튜닝에 대한 PLL데이타를 받아 부화면신호를 동조하는 부화면 튜너(8)와, 상기 부화면 튜너(8)로부터 음성신호, 부화면 영상신호, 자동 미세 조정 전압을 처리하여 출력하는 부화면 IF처리부(9)와, 상기 부화면 IF처리부(9)와 마이컴(7) 사이에 접속되고 저대역 필터로 구성되어 부화면 온시나 부화면 채널 전환시 부화면을 자동 미세 조정하기 위한 동기 검출부(10)와, 상기 부화면 IF처리부(9)와 마이컴(7)사이에 상기 동기 검출부(10)와 병렬로 접속되고 OP앰프(OP1)(OP2), 저항(R1∼R5), 콘덴서(C1)(C2)로 구성되어 부하면 IF처리부(9)로부터 부화면 자동 미세 전압을 검출하여 마이컴(7)의 입력단자(a)(b)로 입력시키는 부화면 자동 미세 조정 전압 검출부(11)를 포함하여서 구성된다.According to the present invention, a sub picture tuner 8 receives PLL data for sub picture tuning from a microcomputer 7 and tunes a sub picture signal, and an audio signal, a sub picture video signal, and automatic fine adjustment from the sub picture tuner 8. It is connected between the sub-screen IF processing unit 9 and the sub-screen IF processing unit 9 and the microcomputer 7 to process and output a voltage. A synchronization detector 10 for automatic fine adjustment, and the sub-screen IF processing unit 9 and the microcomputer 7 are connected in parallel with the synchronization detection unit 10 and have an op amp OP 1 OP 2 and a resistor. (R 1 to R 5 ) and condenser (C 1 ) (C 2 ), if loaded, the sub-screen automatic fine voltage is detected from the IF processing section 9 and input to the input terminals (a) and (b) of the microcomputer 7. And a sub-screen automatic fine adjustment voltage detector 11 for input.
이와같이 구성된 본 발명은 부화면 튜너(8)를 통하여 부화면 IF처리부(9)에서 동기 신호와 자동 미세 조정 전압이 출력되는데 먼저 동기 신호는 동기 검출부(10)를 거쳐 동기가 있을때는 '로우'신호를 마이컴(7)의 단자(C)에 입력시킨다.According to the present invention configured as described above, the synchronization signal and the automatic fine adjustment voltage are output from the sub-screen IF processing unit 9 through the sub-screen tuner 8. First, the synchronization signal is passed through the synchronization detection unit 10 and the 'low' signal is synchronized. Is input to the terminal C of the microcomputer 7.
또한, 자동 미세 조정 전압은 부화면 자동 미세 조정 전압 검출부(11)를 통하여 마이컴(7)의 입력단자(a)로는와 비교된 검출되어 입력되어 입력단자(b)로는와 비교된 전압이 검출되어 입력된다.In addition, the automatic fine adjustment voltage is supplied to the input terminal a of the microcomputer 7 through the sub-screen automatic fine adjustment voltage detector 11. Detected and input compared with the input terminal (b) The voltage compared with is detected and input.
이때, 자동 미세 조정 전압과 OP앰프(OP1)(OP2)의 출력 단자와의 관계는 제3a,b도와 같이 이루어진다.At this time, the relationship between the automatic fine adjustment voltage and the output terminal of the OP amplifier OP 1 OP 2 is made as shown in FIGS. 3a and b.
한편, 키 매트랙스(6)로부터 부화면 튜닝에 관한 키 입력이 들어오면 마이컴(7)에서는 제4도와같은 플로우 챠트를 따라 동작하게 된다.On the other hand, when a key input related to sub-screen tuning comes from the key matrix 6, the microcomputer 7 operates according to the flowchart shown in FIG.
즉, 최초 부화면 튜닝에 관한 키 입력이 들어오면 마이컴(7)은 부화면 튜너(8)에 부화면 튜닝에 대한 PLL데이타를 출력하고 동기 검출부(10)로부터 부하면 동기 신호가 있는지(단자(C)가 '하이'레벨인지)를 판단한다(S1단계).That is, when a key input related to the first sub-screen tuning is input, the microcomputer 7 outputs PLL data for sub-screen tuning to the sub-screen tuner 8, and if there is a sync signal when loaded from the sync detector 10 (terminal ( C) a 'high' level is) the determined (S step 1).
만일, 부화면 동기신호가 있으면 서치 방향모드(최초 서치모드, 서치 업모드, 서치 다운모드)를 판단한다(S2단계).If, the display unit determines if the synchronization signal search mode, the direction (the first search mode, search the up mode, down mode search) (step S 2).
먼저, 최초 서치 모드(서치 방향이 '0')일때 자동 미세 조정 전압 단자(a)가 '하이'인지를 판단하여 '하이'이면 서치 모드를 업으로 셋하고 PLL데이타를 1증가하여 출력한다(S3∼S5단계).First, when the initial search mode (the search direction is '0'), it is determined whether the automatic fine adjustment voltage terminal a is 'high', and when it is 'high', the search mode is set up and the PLL data is increased by one (1). S 3- S 5 steps).
그러나, 단자(a)가 '로우'이면 서치 모드를 다운으로 셋하고 PLL데이타를 1감소시켜 출력한 후 완료한다(S6, S7단계).However, the terminal (a) is complete after the 'low', it sets a search mode to decrease by first-down, and outputs a PLL data (S 6, S 7 steps).
한편, 서치 방향 모드가 서치 업 모드(서치 방향이 '1')일때에는 자동 미세 조정 범위를 초과했는지를 판단하여 초과했으면 그대로 완료한다(S8단계).On the other hand, the search mode, the search direction is the up mode (search direction is set to '1') are finished, it is determined that more than one greater than the time the automatic fine tuning range as (S 8 step).
그러나, 자동 미세 조정 범위를 초과하지 않았으면 마이컴(7)의 단자(b)가 '로우'인가를 판단하여 '로우'가 아니면 상기 S5단계인 PLL데이타를 1증가시킨후 출력하고, '로우'이면 PLL데이타가 센터(Center)로 들어갈수 있도록 PLL데이타를 1감소시켜 출력하고 자동 미세 조정을 완료한다(S9, S10단계).However, automatically if it is not greater than the fine adjustment range is determined whether the terminal (b) a "low" of the microcomputer (7) or a "low" and the output was increased, to the PLL data, the S 5 steps, "Low ', PLL data is reduced by 1 so that the PLL data can enter the center, and the automatic fine tuning is completed (S 9 and S 10 steps).
또한, 서치 방향 모드가 서치 다운 모드(서치 방향이 '2')일때는 자동 미세 조정 초과 범위를 판단하여 초과하지 않았을때 단자(a)가 '로우'인가를 판단한다(S11, S12단계).In addition, when the search direction mode is the search down mode (the search direction is '2'), the automatic fine adjustment excess range is determined, and when it is not exceeded, it is determined whether the terminal a is 'low' (steps S 11 and S 12 ). ).
만일, 단자(a)가 '로우'가 아니면 PLL데이타를 1감소시켜 출력한다.(S13단계).If the terminal a is not 'low', the PLL data is reduced by one and outputted (step S13 ).
그러나, 단자(a)가 '로우'이면 PLL데이타가 센터로 들어갈수 있도록 PLL데이타를 1증가시켜 출력하고 자동 미세 조정을 완료한다(S14단계).However, the terminal (a) is 'low', it is the PLL data to the PLL by 1 so that data output deuleogalsu the center and completes the automatic fine tuning (Step S 14).
이상에서 설명한 바와 같이 본 발명은 제4도와 같은 동작을 각 대역별로 나누어 여러번 실시하므로 자동 미세 조정을 실시할 수 있으며 부화면 시스템에서 뿐만 아니라 pop(picture out picture) 시스템에서도 실시 가능하다. 또한, 마이컴(7)의 입려단자(a)(b)를 이용하여 자동 미세 조정을 실시하므로 마이컴(7)에서의 별도의 단자를 필요로 하지 않으며 부화면 자체에서 자동 미세 조정을 실시할 수 있어 주화면의 텔레비젼 신호에 의존하였던 종래에 비해 보다 선명한 부화면을 얻을 수 있는 효과가 있다.As described above, the present invention can perform automatic fine adjustment by dividing the operation as shown in FIG. 4 for each band and can be performed not only in the sub picture system but also in the pop (picture out picture) system. In addition, since the fine adjustment is performed using the input terminals (a) and (b) of the microcomputer 7, it is possible to perform the automatic fine tuning on the sub-screen itself without requiring a separate terminal of the microcomputer 7. Compared with the conventional TV signal on the main screen, a clearer sub picture can be obtained.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019920021022A KR950006449B1 (en) | 1992-11-10 | 1992-11-10 | Automatic sub-adjustment method and device for TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019920021022A KR950006449B1 (en) | 1992-11-10 | 1992-11-10 | Automatic sub-adjustment method and device for TV |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR940013175A KR940013175A (en) | 1994-06-25 |
| KR950006449B1 true KR950006449B1 (en) | 1995-06-15 |
Family
ID=19342814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019920021022A Expired - Fee Related KR950006449B1 (en) | 1992-11-10 | 1992-11-10 | Automatic sub-adjustment method and device for TV |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR950006449B1 (en) |
-
1992
- 1992-11-10 KR KR1019920021022A patent/KR950006449B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR940013175A (en) | 1994-06-25 |
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