KR940005610Y1 - Apparatus for switching two different type image screens - Google Patents

Apparatus for switching two different type image screens Download PDF

Info

Publication number
KR940005610Y1
KR940005610Y1 KR2019910023123U KR910023123U KR940005610Y1 KR 940005610 Y1 KR940005610 Y1 KR 940005610Y1 KR 2019910023123 U KR2019910023123 U KR 2019910023123U KR 910023123 U KR910023123 U KR 910023123U KR 940005610 Y1 KR940005610 Y1 KR 940005610Y1
Authority
KR
South Korea
Prior art keywords
signal
unit
luminance
switching
supplied
Prior art date
Application number
KR2019910023123U
Other languages
Korean (ko)
Other versions
KR930017090U (en
Inventor
강신호
Original Assignee
주식회사 금성사
이헌조
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 금성사, 이헌조 filed Critical 주식회사 금성사
Priority to KR2019910023123U priority Critical patent/KR940005610Y1/en
Publication of KR930017090U publication Critical patent/KR930017090U/en
Application granted granted Critical
Publication of KR940005610Y1 publication Critical patent/KR940005610Y1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/148—Video amplifiers
    • 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
    • H04N5/455—Demodulation-circuits
    • 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
    • H04N5/505—Invisible or silent tuning
    • 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
    • H04N5/52—Automatic gain control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

내용 없음.No content.

Description

EE 모니터 절환 회로EE monitor switching circuit

제1도는 종래의 EE 모니터 절환 회로도.1 is a conventional EE monitor switching circuit diagram.

제2도는 본 고안의 EE 모니터 절환 회로도.2 is an EE monitor switching circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

11, 19 : 스위칭부 12 : 고역여파기11, 19: switching unit 12: high frequency filter

13 : FM복조부 14 : 저역여파기13: FM demodulator 14: low pass filter

15 : 디-엠파시스부 16 : 잡음제거부15: de-emphasis unit 16: noise canceling unit

17 : 휘도/색도 혼합부 18 : 뮤팅부17: luminance / chromatic mixing unit 18: muting unit

20 : 자동이득 조절부 21 : 비디오 증폭부20: automatic gain control unit 21: video amplification unit

22 : 강제동기 제어부 AMP11, AMP12: 프리앰프22: forced synchronization control unit AMP 11 , AMP 12 : preamplifier

Q11: 트랜지스터Q 11 : transistor

본 고안은 방송신호 수신모드(EE : Electric To Electric) 절환 회로에 관한 것으로, 특히 변속 재생시에도 EE화면(튜너/라인)을 제공할 수 있도록한 EE 모니터 절환 회로에 관한 것이다.The present invention relates to a broadcast signal reception mode (EE: Electric To Electric) switching circuit, and more particularly, to an EE monitor switching circuit that can provide an EE picture (tuner / line) even during shift reproduction.

제1도는 종래의 EE 모니터 절환 회로도로서 이의 작용을 설명하면 다음과 같다.1 is a conventional EE monitor switching circuit diagram illustrating the operation thereof as follows.

테이프에서 재생된 복합 영상신호는 프리앰프(AMP1), (AMP2)에서 각각 증폭된후, 헤드 스위칭신호(H/S)에 의하여 스위칭부(1)에서 해당 채널(CH1), (CH2)의 신호가 선택되어지고, 이렇게 선택된 복합 영상신호는 크로마 프로세서와, 고역여파기(2)로 이어지는 휘도 프로세서로 각기 공급된다.The composite video signal reproduced on the tape is amplified by the preamps AMP 1 and AMP 2 , respectively, and then the corresponding channels CH 1 and CH in the switching unit 1 by the head switching signal H / S. The signal of 2 ) is selected, and the composite video signal thus selected is supplied to the chroma processor and the luminance processor followed by the high pass filter 2, respectively.

상기 고역 여파기(2)는 자신의 입력단에 인가된 복합 영상신호에서 휘도신호만을 추출하여 이를 FM복조부(3)에 공급하고, 여기서 기록할 때의 FM 변조신호가 원래의 신호로 복원된다.The high pass filter 2 extracts only the luminance signal from the composite video signal applied to its input terminal and supplies it to the FM demodulator 3, where the FM modulated signal at the time of recording is restored to the original signal.

그리고 상기 FM복조부(3)의 출력신호는 저역 여파기(4)에 공급되어 여기서 순수 휘도신호만이 통과되고, 이는 고역을 저하시키는 디엠파시스부(5) 및 잡음제거부(6)를 통해 휘도/색도혼합부(7)에 공급되어 여기서 휘도신호와 크로마신호가 혼합되어 스위칭부(8)의 일측고정단자(c)에 공급된다.And the output signal of the FM demodulator 3 is supplied to the low pass filter 4, where only the pure luminance signal is passed through, through the de-emphasis section 5 and the noise canceling section 6, which deteriorates the high range. It is supplied to the luminance / chromatic mixing unit 7 where the luminance signal and the chroma signal are mixed and supplied to one fixed terminal c of the switching unit 8.

한편, 튜어신호(TS)나 라인신호(LS)는 자동이득 조절부(9)를 통해 상기 스위칭부(8)의 타측고정단자(b)에 공급된다.Meanwhile, the tour signal TS or the line signal LS is supplied to the other fixed terminal b of the switching unit 8 through the automatic gain control unit 9.

이와 같은 경로를 통해 상기 스위칭부(8)에 재생신호, 튜너신호(TS) 또는 라인신호(LS)가 공급되는데, 재생모드에서는 상기 스위칭부(8)의 가동단자(a)가 고정단자(c)에 단락되어 상기 휘도/색도 혼합부(7)에 출력되는 재생신호가 뮤팅부(10) 및 비디오 증폭부(11)를 통해 티브이나 모니터에 공급되고, EE모니터 모드에서는 상기 스위칭부(8)의 가동단자(a)가 고정단자(b)에 단락되어 상기 튜너신호(TS)나 라인신호(LS)가 상기 뮤팅부(10) 및 비디오 증폭부(11)를 통해 티브이나 모니터에 디스플레이 된다.The reproduction signal, the tuner signal TS or the line signal LS is supplied to the switching unit 8 through such a path. In the regeneration mode, the movable terminal a of the switching unit 8 is a fixed terminal c. And a reproduction signal output to the luminance / chromatic mixing unit 7 through the muting unit 10 and the video amplifying unit 11 are supplied to the TV or the monitor. In the EE monitor mode, the switching unit 8 The movable terminal a of is shorted to the fixed terminal b so that the tuner signal TS or the line signal LS is displayed on the TV or monitor through the muting unit 10 and the video amplifier 11.

그러나 이와 같은 종래의 회로에 있어서는 스위칭부 다음단에 뮤팅부가 연결되어 있으므로 변속 재생 모드에서 EE 모니터 화면을 보고자할때 변속 재생모드에서는 강제동기신호가 뮤팅부에 인가되어 EE 화면에 강제 동기신호가 삽입되므로 그 강제 동기신호가 티브이나 모니터상에 나타나 EE화면이 흐트러지는 결함이 있었다.However, in this conventional circuit, since the muting part is connected to the next stage of the switching part, when the EE monitor screen is to be viewed in the variable speed reproduction mode, the forced synchronization signal is applied to the muting part in the variable speed reproduction mode to insert the forced synchronization signal into the EE screen. As a result, the forced synchronization signal appeared on the TV or the monitor, and the EE screen was disturbed.

본 고안은 이와 같은 종래의 결함을 해결하기 위하여 정상 재생상태 및 변속재생시에도 선명한 EE 화면을 제공할 수 있게 안출한 것으로 이를 첨부한 도면에 의하여 상세히 설명한다.The present invention devised to provide a clear EE screen even during normal playback and shift playback in order to solve such a conventional defect, which will be described in detail with reference to the accompanying drawings.

제2도는 본 고안의 EE 모니터 절환 회로도로서 이에 도시한 바와 같이, 프리앰프(AMP11), (AMP12)를 통해 공급되는 재생신호에서 헤드스위칭 신호(H/S)에 따라 해당 채널(CH1), (CH2)의 신호를 선택하는 스위칭부(11)와, 고역 여파기(12)를 통해 상기 스위칭부(11)로부터 공급되는 재생신호에서 원래의 휘도신호(Y)를 복원하는 FM 복조부(13)와, 저역 여파기(14), 디-엠파시스(15), 잡음 제거부(16)를 통해 상기 FM 복조부(13)로 부터 공급되는 재생 휘도신호(Y)에 색도신호(C)를 혼합하는 휘도/색도 혼합부(17)와, 상기 휘도/색도 혼합부(17)의 출력 휘도신호(Y)에 강제 동기신호(CSYN)를 혼합시키는 뮤팅부(18)와, 자동이득 조절부(20)를 통해 공급되는 튜너신호(TS) 또는 라인신호(LS)나 상기 뮤팅부(18)의 출력신호를 선택하여 이를 비디오 증폭부(21)를 통해 티브이나 모니터에 공급하는 스위칭부(19)와, EE 모니터신호(EEMS)에 의해 상기 강제 동기신호(CSYN)를 뮤팅시키는 강제동기 제어부(22)로 구성한 것으로, 이와 같이 구성된 본 고안의 작용 및 효과를 상세히 설명하면 다음과 같다.2 is an EE monitor switching circuit diagram of the present invention, as shown here, according to the head switching signal (H / S) in the reproduction signal supplied through the preamp (AMP 11 ), (AMP 12 ) corresponding channel (CH 1) ), A switching unit 11 for selecting the signals of (CH 2 ), and an FM demodulation unit for restoring the original luminance signal (Y) from the reproduction signal supplied from the switching unit (11) through the high pass filter (12). And a chromaticity signal C to the reproduction luminance signal Y supplied from the FM demodulator 13 through the low pass filter 14, the de-emphasis 15, and the noise canceling unit 16. And a muting part 18 for mixing the forced synchronization signal CSYN with the output luminance signal Y of the luminance / chromatic mixing part 17, and an automatic gain adjusting part for mixing Selecting the tuner signal TS or line signal LS or the output signal of the muting unit 18 supplied through the video signal 20 is transmitted to the TV or monitor through the video amplifier 21. The switching unit 19 and the forced synchronization control unit 22 for muting the forced synchronization signal CSYN by the EE monitor signal EEMS, which will be described in detail below. Is the same as

테이프에서 재생된 복합 영상신호는 프리앰프(AMP11), (AMP12)에서 각각 증폭된후, 헤드 스위칭신호(H/S)에 의하여 스위칭부(11)에서 해당 채널(CH1), (CH2)의 신호가 선택되어지고, 이렇게 선택된 복합 영상신호는 크로마(색도) 프로세서와, 고역여파기(12)로 이어지는 휘도 프로세서로 각기 공급된다.The composite video signal reproduced on the tape is amplified by the preamps AMP 11 and AMP 12 , respectively, and then the corresponding channels CH 1 and CH in the switching unit 11 by the head switching signal H / S. 2 ) is selected, and the composite video signal thus selected is supplied to a chroma processor and a luminance processor followed by the high pass filter 12, respectively.

상기 고역여파기(12)는 자신의 입력단에 인가된 복합 영상신호에서 휘도신호(Y)만을 추출하여 이를 FM복조부(13)에 공급하고, 여기서 기록할때의 FM변조 휘도신호(Y)가 원래의 신호로 복원된다.The high pass filter 12 extracts only the luminance signal Y from the composite video signal applied to its input terminal and supplies it to the FM demodulator 13, where the FM modulated luminance signal Y at the time of recording is originally obtained. The signal is restored.

그리고 상기 FM복조부(13)의 출력신호는 저역 여파기(14)에 공급되어 여기서 순도 휘도신호(Y)만이 통과되고, 이는 고역을 저하시키는 디-엠파시스부(15) 및 잡음 제거부(16)를 통해 휘도/색도혼합부(17)에 공급되어 여기서 휘도신호(Y)와 색도신호(C)가 혼합된후, 뮤팅부(18), 스위칭부(19) 및 비디오 증폭부(21)를 통해 티브이나 모니터에 출력된다.The output signal of the FM demodulator 13 is supplied to the low pass filter 14, where only the purity luminance signal Y is passed, which de-emphasis 15 and noise canceller 16 reduce the high frequency. After supplying to the luminance / chroma mixing unit 17 through the luminance signal (Y) and the chroma signal (C), the muting unit 18, the switching unit 19 and the video amplifier 21 Is output to the TV or monitor.

이와 같은 경로를 통해 상기 스위칭부(19)에 재생신호(PLS)가 공급됨과 아울러, 자동이득 조절부(20)를 통해서는 튜너신호(TS) 또는 라인신호(LS)가 공급된다.The reproduction signal PLS is supplied to the switching unit 19 through the path, and the tuner signal TS or the line signal LS is supplied through the automatic gain control unit 20.

이와 같은 상태에서 변속 재생시, 트랜지스터(Q11)의 베이스에 EE모드신호(EEMS)가 공급되지 않으므로 그가 오프되고, 이로인하여 서보(SERVO)로부터 공급되는 강제 동기신호(CSYN)가 뮤팅부(18)에 공급됨에 따라 상기 휘도/색도 혼합부(17)에서 출력되는 휘도신호(Y)와 그 강제동기신호(CSYN)와 혼합되며, 이렇게 혼합된 휘도신호(Y) 및 강제 동기신호(CSYN)가 스위칭부(19)에 공급되는데, 휘도/색도 혼합부(17) 다음단에 뮤팅부(18)가 연결되므로 변속재생시 EE화면을 보더라도 상기 강제 동기신호(CSYN)가 실린 휘도신호는 상기 스위칭부(19)에 의하여 차단되므로 시청자는 티브이나 모니터를 통해 흐트러짐이 없는 EE화면(튜너/라인)을 볼 수 있게 된다.In this state of shift reproduction, since the EE mode signal EEMS is not supplied to the base of the transistor Q 11 , it is turned off, whereby the forced synchronization signal CSYN supplied from the servo SERVO is muted. ) Is mixed with the luminance signal Y output from the luminance / chromatic mixing unit 17 and the forced synchronization signal CSYN, and the mixed luminance signal Y and the forced synchronization signal CSYN are thus mixed. It is supplied to the switching unit 19, the muting unit 18 is connected to the next stage of the luminance / chroma mixing unit 17, so that the luminance signal carrying the forced synchronization signal CSYN is displayed even if the EE screen during the shift playback Blocked by (19), viewers can see the EE picture (tuner / line) without any disturbance through the TV or monitor.

한편, 시청자가 기록되는 신호를 확인하고자 할때, 상기 스위칭부(19)에서 가동단자(a) 고정단자(c)에 단락되고, 이때 상기 EE모드신호(EEMS)가 고전위로 공급되어 상기 트랜지스터(Q11)가 온됨에 따라 강제 동기신호(CSYN)가 그 트랜지스터(Q11)를 통해 접지측으로 뮤팅되므로 화면의 흔들림이 완벽하게 방지된다.On the other hand, when the viewer wants to check the recorded signal, the switching unit 19 is short-circuited to the movable terminal (a) and the fixed terminal (c), wherein the EE mode signal (EEMS) is supplied at a high potential to the transistor ( As Q11) is turned on, the forced synchronization signal CSYN is muted to the ground side through the transistor Q11, so that the screen shake is completely prevented.

이상에서 상세히 설명한 바와 같이 본 고안은 강제 동기신호가 공급되는 뮤팅부를 EE 모드와 재생 모드를 절환하는 스위칭부의 이전단에 위치시키고, 필요에 따라 그강제동기 신호를 뮤팅시킴으로써 정상 재생모드 뿐만 아니라 변속재생모드시에도 선명한 EE화면을 제공할 수 있는 이점이 있다.As described in detail above, the present invention locates the muting part to which the forced synchronization signal is supplied at the previous stage of the switching part for switching between the EE mode and the regeneration mode, and mutes the forced brake signal as necessary, thereby shifting the reproduction as well as the normal regeneration mode. Even in the mode, there is an advantage that can provide a clear EE screen.

Claims (2)

프리앰프(AMP11), (AMP12)를 통해 공급되는 재생신호에서 헤드스위칭 신호(H/S)에 따라 해당 채널(CH1)(CH2)의 신호를 선택하는 스위칭부(11)와, 고역여파기(12)를 통해 상기 스위칭부(11)로부터 공급되는 재생신호에서 원래의 휘도신호(Y)를 복원하는 FM복조부(13)와, 저역 여파기(14), 디-엠파시스(15), 잡음 제거부(16)를 통해 상기 FM복조부(13)로부터 공급되는 재생 휘도신호(Y)에 색도신호(C)를 혼합하는 휘도/색도 혼합부(17)와, 상기 휘도/색도 혼합부(17)휘도신호(Y)에 강제 동기신호(CSYN)를 혼합시키는 뮤팅부(18)와, 자동이득 조절부(20)를 통해 공급되는 튜너신호(TS) 또는 라인신호(LS)나 상기 뮤팅부(18)의 출력신호를 선택하여 이를 비디오 증폭부(21)를 통해 티브이나 모니터에 공급하는 스위칭부(19)와, EE 모니터신호(EEMS)에 의해 상기 강제 동기신호(CSYN)를 뮤팅시키는 강제동기 제어부(22)로 구성한 것을 특징으로 하는 EE 모니터 절환회로.A switching unit 11 for selecting a signal of a corresponding channel CH 1 and CH 2 according to the head switching signal H / S from the reproduction signals supplied through the preamps AMP 11 and AMP 12 ; FM demodulator 13 for restoring the original luminance signal Y from the reproduction signal supplied from the switching unit 11 through the high pass filter 12, the low pass filter 14, and the de-emphasis 15. A luminance / chromatic mixing unit 17 for mixing the chroma signal C with the reproduction luminance signal Y supplied from the FM demodulation unit 13 through the noise removing unit 16, and the luminance / chromatic mixing unit 17; (17) a muting unit 18 for mixing the forced synchronization signal CSYN with the luminance signal Y, and a tuner signal TS or line signal LS supplied through the automatic gain control unit 20 or the muting. When muting the forced synchronization signal CSYN by a switching unit 19 which selects an output signal of the unit 18 and supplies it to the TV or monitor through the video amplifier 21 and an EE monitor signal EEMS. EE is monitored, it characterized in that the switching circuit is configured to force the synchronization control section 22. 제1항에 있어서, EE모드신호(EEMS)단자를 저항(R11)을 통해 저항(R12) 및 에미터가 접지된 트랜지스터(Q11)의 베이스에 접속하고, 강제 동기신호(CSYN) 단자를 상기 트랜지스터(Q11)의 콜렉터에 접속하여 상기 강제동기 제어부(22)를 구성한 것을 특징으로 하는 EE 모니터 절환회로.The EE mode signal (EEMS) terminal is connected to the base of the transistor Q 11 having the resistor R 12 and the emitter grounded through the resistor R 11 , and the forced synchronization signal CSYN terminal. Is connected to the collector of the transistor (Q 11 ) to configure the forced synchronous control section (22).
KR2019910023123U 1991-12-20 1991-12-20 Apparatus for switching two different type image screens KR940005610Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019910023123U KR940005610Y1 (en) 1991-12-20 1991-12-20 Apparatus for switching two different type image screens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019910023123U KR940005610Y1 (en) 1991-12-20 1991-12-20 Apparatus for switching two different type image screens

Publications (2)

Publication Number Publication Date
KR930017090U KR930017090U (en) 1993-07-29
KR940005610Y1 true KR940005610Y1 (en) 1994-08-19

Family

ID=19324910

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019910023123U KR940005610Y1 (en) 1991-12-20 1991-12-20 Apparatus for switching two different type image screens

Country Status (1)

Country Link
KR (1) KR940005610Y1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100247252B1 (en) * 1996-11-12 2000-04-01 조성일 An apparatus for winding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100247252B1 (en) * 1996-11-12 2000-04-01 조성일 An apparatus for winding

Also Published As

Publication number Publication date
KR930017090U (en) 1993-07-29

Similar Documents

Publication Publication Date Title
US5337196A (en) Stereo/multivoice recording and reproducing video tape recorder including a decoder developing a switch control signal
KR19980048116A (en) TV automatic recording method when sound muting
KR940005610Y1 (en) Apparatus for switching two different type image screens
US5543926A (en) Recording and reproducing apparatus
US5097345A (en) Magnetic video recording apparatus
KR940004080Y1 (en) Noise erasing device of vcr color signal
KR200176961Y1 (en) Apparatus for warning misoperation of the sound multiplex through detectioning voltage of color killer in weak signal
US3982067A (en) Television signal amplifier apparatus for counteracting effects of unwanted signal components
KR930008228Y1 (en) Tv video signals muting circuit
KR910008346Y1 (en) Picture quality improving device of video cassette recorder
KR920007936Y1 (en) High frequency band compensating circuit of video signal of video tape
KR950005307Y1 (en) Dubbing circuit of double deck v.c.r.
KR950010373Y1 (en) Vcr simultaneous recording system
JPS62171288A (en) Recording picture quality compensation circuit for video tape recorder
KR100322604B1 (en) Apparatus for controlling a level of recording color signal and video copy apparatus using thereof
KR930005151Y1 (en) Recording/reproducing circuit for vcr
KR970000395Y1 (en) Television having function for controlling luminance level of video signal
KR920002582B1 (en) Noise removing circuit for picture searching
KR950005550Y1 (en) Unit switching caption in video cassette recorder
KR0144891B1 (en) Double wide tv receiver and telephone receiving method of double deck vtr with telephone receiving function
JP2508717B2 (en) TV receiver
KR100193625B1 (en) Stabilized Gain Control Method
KR100220176B1 (en) Video signal control apparatus of a multi-tvcr
KR20000034306A (en) Device for selecting an external input of television
KR19980049122U (en) VSI system with playback instability guidance

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: 20030707

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee