KR950030649A - HTV (NTTV) and NTSC (NTSC) signal co-receiving device - Google Patents

HTV (NTTV) and NTSC (NTSC) signal co-receiving device Download PDF

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Publication number
KR950030649A
KR950030649A KR1019940007625A KR19940007625A KR950030649A KR 950030649 A KR950030649 A KR 950030649A KR 1019940007625 A KR1019940007625 A KR 1019940007625A KR 19940007625 A KR19940007625 A KR 19940007625A KR 950030649 A KR950030649 A KR 950030649A
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signal
ntsc
hdtv
signal output
output
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KR1019940007625A
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KR970002965B1 (en
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김기현
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이헌조
엘지전자 주식회사
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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
    • H04N5/46—Receiver circuitry for the reception of television signals according to analogue transmission standards for receiving on more than one standard at will
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/12—Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C2207/00—Indexing scheme relating to arrangements for writing information into, or reading information out from, a digital store
    • G11C2207/007—Register arrays

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

Abstract

본 발명은 HDTV 및 NTSC 신호를 공동으로 수신할 수 있는 HDTV 및 NTSC 신호 공동수신 장치에 관한 것으로, 특히 수신된 방송신호가 HDTV 또는 NTSC 신호인지를 판별하여 적절한 신호처리를 할 수 있도록 자동으로 절환해 주므로써 HDTV 및 NTSC 신호를 모두 수신할 수 있는 HDTV 및 NTSC신호 공동수신 장치에 관한 것이다. 이를 위해, 본 발명은 전송되는 HDTV 신호 및 NTSC 신호를 수신하여 동조시키는 튜너(2), 상기 튜너(2)로부터 출력되는 신호를 스위칭 동작을 통해 선택하여 출력하는 제1스위칭수단(3), 상기 제1스위칭수단(3)으로부터 출력되는 신호를 NTSC 영상신호로 처리하는 NTSC 신호처리수단(4), 상기 제1스위칭수단(3)으로부터 출력되는 신호를 HDTV 영상신호로 처리하는 HDTV 신호처리수단(5), 상기 NTSC 신호처리수단(4) 및 HDTV 신호처리수단으로부터 출력되는 신호를 스위칭 동작을 통해 선택하여 화면으로 표시할 수 있도록 출력하는 제2스위칭수단(6) 및 상기 HDTV 신호처리수단(5)으로부터 출력되는 기저대역 신호를 이용하여 현재 동조된 채널에서 수신되는 신호가 HDTV 신호인지 NTSC 신호인지 판별하여 상기 제1 및 제2스위칭수단(3), (6)을 제어하는 HDTV 및 NTSC 신호판별수단(7)으로 구성된다. 따라서, 본 발명은 간단한 구조로 수신신호가 HDTV 신호인지 NTSC 신호인지 자동으로 판단할 수 있으므로, HDTV 수상기에 NTSC 영상신호 처리를 위한 장치를 구비하여 HDTV 수신기에서 NTSC 신호도 수신할 수 있는 효과가 있다.The present invention relates to an HDTV and NTSC signal co-receiving apparatus that can receive HDTV and NTSC signals jointly, and in particular, to automatically determine whether the received broadcast signal is an HDTV or NTSC signal, so that appropriate signal processing can be performed. The present invention relates to an HDTV and NTSC signal co-receiving device capable of receiving both HDTV and NTSC signals. To this end, the present invention provides a tuner 2 for receiving and tuning a transmitted HDTV signal and an NTSC signal, first switching means 3 for selecting and outputting a signal output from the tuner 2 through a switching operation, and NTSC signal processing means 4 for processing the signal output from the first switching means 3 as an NTSC video signal, HDTV signal processing means for processing the signal output from the first switching means 3 as an HDTV video signal ( 5) a second switching means 6 and the HDTV signal processing means 5 for outputting the signals output from the NTSC signal processing means 4 and the HDTV signal processing means to be displayed on a screen by switching operations; HDTV and NTSC signal discrimination for controlling the first and second switching means (3) and (6) by determining whether the signal received in the currently tuned channel is an HDTV signal or an NTSC signal using the baseband signal output from Sudan (7) It consists of a. Therefore, since the present invention can automatically determine whether the received signal is an HDTV signal or an NTSC signal with a simple structure, the HDTV receiver is provided with a device for processing NTSC video signals, so that the NTSC signal can also be received by the HDTV receiver. .

Description

에이치디티브이(HDTV) 및 에티에스씨(NTSC)신호 공동수신 장치HDTV and NTSC signal co-receiving device

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

도면의 간단한 설명Brief description of the drawings

제1도 (가)는 NTSC 송신 스펙트럼도, 제1도 (나)는 HDTV 송신 스펙트럼도, 제2도는 본 발명에 의한 HDTV 및 NTSC 신호 공동수신 장치의 구성도, 제3도는 제2도의 HDTV 및 NTSC 신호 판별부의 세부구성도, 제4도는 NTSC 반송파 간섭배제 필터의 전달특성도, 제5도는 NTSC 반송파 통과필터의 전달특성도.1 (a) is an NTSC transmission spectrum diagram, FIG. 1 (b) is an HDTV transmission spectrum diagram, FIG. 2 is a configuration diagram of the HDTV and NTSC signal co-receiving apparatus according to the present invention, and FIG. Detailed configuration diagram of the NTSC signal discrimination unit, FIG. 4 is a transfer characteristic diagram of an NTSC carrier interference suppression filter, and FIG. 5 is a transfer characteristic diagram of an NTSC carrier pass filter.

Claims (9)

전송되는 HDTV 신호 및 NTSC 신호를 수신하여 동조시키는 튜너(2), 상기 튜너(2)로부터 출력되는 신호를 스위칭 동작을 통해 선택하여 출력하는 제1스위칭수단(3), 상기 제1스위칭수단(3)으로부터 출력되는 신호를 NTSC 영상신호로 처리하는 NTSC 신호처리수단(4), 상기 제1스위칭수단(3)으로부터 출력되는 신호를 HDTV 영상신호로 처리하는 HDTV신호처리수단(5), 상기 NTSC 신호처리수단(4) 및 HDTV 신호처리수단(5)으로부터 출력되는 신호를 스위칭 동작을 통해 선택하여 화면으로 표시할 수 있도록 출력하는 제2스위칭수단(6) 및 상기 HDTV 신호처리수단(5)으로부터 출력되는 기저대역 신호를 이용하여 현재 동조된 채널에서 수신되는 신호가 HDTV 신호인지 NTSC 신호인지 판별하여 상기 제1 및 제2스위칭수단(3), (6)을 제어하는 HDTV 및 NTSC 신호판별수단(7)으로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신 장치.A tuner 2 for receiving and tuning the transmitted HDTV signal and NTSC signal, a first switching means 3 for selecting and outputting a signal output from the tuner 2 through a switching operation, and the first switching means 3 NTSC signal processing means (4) for processing the signal output from the NTSC video signal, HDTV signal processing means (5) for processing the signal output from the first switching means (3) as HDTV video signal, the NTSC signal Output from the second switching means 6 and the HDTV signal processing means 5 for outputting the signal output from the processing means 4 and the HDTV signal processing means 5 so as to be selected and displayed on a screen through a switching operation; HDTV and NTSC signal discrimination means (7) for controlling the first and second switching means (3) and (6) by determining whether the signal received in the currently tuned channel is an HDTV signal or an NTSC signal using the baseband signal. ) HDTV and NTSC signals common receiver as ranging. 제1항에 있에서, 상기 HDTV 및 NTSC 신호판별수단(7)은 HDTV 신호처리수단(5)으로부터 출력되는 기저대역신호를 NTSC 반송파 특성에 따라 각각 필터링하는 NTSC 반송파 필터수단(71), 상기 NTSC 반송파 필터수단(71)으로부터 출력되는 신호의 전력값을 각각 계산하는 전력계산수단(72), 상기 전력계산수단(72)으로부터 출력되는 신호로부터 순간적인 노이즈 효과를 제거하는 저대역통과 필터수단(73) 및 상기 저대역통과 필터수단(73)으로부터 출력되는 신호를 비교하여 상기 제1 및 제2스위칭수단(3),(6) 으로 출력하는 비교수단(74)으로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신 장치.The NTSC carrier filtering means (71) according to claim 1, wherein the HDTV and NTSC signal discrimination means (7) filter NTSC carriers (71) for filtering the baseband signals output from the HDTV signal processing means (5) according to NTSC carrier characteristics. Power calculation means 72 for calculating the power value of the signal output from the carrier filter means 71, and low pass filter means 73 for removing the instantaneous noise effect from the signal output from the power calculation means 72; ) And a comparison means (74) for comparing the signals output from the low pass filter means (73) and outputting them to the first and second switching means (3) and (6). NTSC signal co-receipt device. 제2항에 있어서, 상기 NTSC 반송파 필터수단(71)은 상기 HDTV 신호처리수단(5)으로부터 출력되는 기저대역신호로부터 NTSC의 반송파를 제거하는 NTSC 반송파 간섭배제 필터, 및 상기 HDTV 신호처리수단(5)으로부터 출력되는 기저대역 신호로부터 NTSC의 반송파를 통과시키는 NTSC 반송파통과 필터로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신 장치.3. The NTSC carrier interference elimination filter (5) according to claim 2, wherein the NTSC carrier filter means (71) removes an NTSC carrier from a baseband signal output from the HDTV signal processing means (5), and the HDTV signal processing means (5). HDTV and NTSC co-receiving device, characterized in that the NTSC carrier pass filter for passing the carrier of the NTSC from the baseband signal output from the). 제2항에 있어서, 상기 NTSC 반송파 필터수단(71)은 필터링에 적당한 전달특성을 얻기 위해 상기 HDTV신호처리수단(5)으로부터 출력되는 기저대역 신호를 지연시키는 지연수단(711), 상기 지연수단(711)으로부터 출력되는 신호와 상기 HDTV 신호처리수단(5)으로부터 출력되는 기저대역 신호를 가산하는 가산수단(712) 및 상기 지연수단(711)으로부터 출력되는 신호를 상기 HDTV 신초처리수단(5)으로부터 출력되는 신호에서 감산하는 감산수단(713)으로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신 장치.3. The NTSC carrier filter means 71 further comprises delay means 711 for delaying the baseband signal output from the HDTV signal processing means 5 to obtain a transfer characteristic suitable for filtering. An adder 712 for adding a signal output from the signal 711 and a baseband signal output from the HDTV signal processing means 5 and a signal output from the delay means 711 from the HDTV shooter processing means 5; HDTV and NTSC signal co-receiving apparatus, characterized in that consisting of a subtraction means (713) for subtracting from the output signal. 제2항에 있어서, 상기 전력계산수단(72)은 상기 NTSC 반송파 필터수단(71)으로부터 출력되는 신호를 각각 자승하는 제1 및 제2자승기 (721),(722)로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신장치.3. The power calculating means (72) according to claim 2, characterized in that the power calculating means (72) is composed of first and second squarers (721, 722) which square the signals output from the NTSC carrier filter means (71), respectively. HDTV and NTSC signal receiver. 제2항에 있어서, 상기 저대역통과 필터수단(73)은 상기 전력계산수단(72)으로부터 출력되는 신호를 각각 저대역통과 필터링하는 제1 및 제2저대역통과 필터(731),(732)로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신 장치.3. The first and second low pass filters 731 and 732 of claim 2, wherein the low pass filter means 73 low pass filters the signals output from the power calculation means 72, respectively. HDTV and NTSC signal co-receipt device, characterized in that consisting of. 제3항에 있어서, 상기 NTSC 반송파 간섭배제 필터는 필터링에 적당한 전달특성을 얻기 위해 상기 HDTV 신호처리수단(5)으로부터 출력되는 기저대역 신호를 지연시키는 지연수단(711), 및 상기 지연수단(711)으로부터 출력되는 신호를 상기 HDTV 신호처리수단(5)으로부터 출력되는 신호에서 감산하는 감산수단(713)으로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신 장치.4. The NTSC carrier interference rejection filter according to claim 3, wherein the NTSC carrier interference rejection filter comprises: delay means 711 for delaying the baseband signal output from the HDTV signal processing means 5 to obtain transmission characteristics suitable for filtering; And a subtraction means (713) for subtracting the signal output from the signal output from the HDTV signal processing means (5). 제3항에 있어서, 상기 NTSC반송파통과 필터는 필터링에 적당한 전달특성을 얻기 위해 상기 HDTV 신호처리수단(5)으로부터 출력되는 기저대역 신호를 지연시키는 지연수단(711), 및 상기 지연수단(711)으로부터 출력되는 신호와 상기 HDTV 신호처리수단(5)으로부터 출력되는 기저대역 신호를 가산하는 가산수단(712)으로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신 장치.4. The NTSC carrier pass filter comprises delay means 711 for delaying a baseband signal output from the HDTV signal processing means 5 to obtain a transfer characteristic suitable for filtering, and the delay means 711. And an addition means (712) for adding a signal output from the baseband signal output from the HDTV signal processing means (5). 제4항 또는 제7항 또는 제8항에 있어서, 상기 지연수단(711)은 직렬연결된 12개의 레지스터로 구성되는 것을 특징으로 하는 HDTV 및 NTSC 신호 공동수신 장치.9. The HDTV and NTSC signal co-receiving device according to claim 4, 7, or 8, wherein the delay means (711) is composed of 12 registers connected in series. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019940007625A 1994-04-12 1994-04-12 Receiving apparatus accommodating both hdtv signal and the ntsc signal KR970002965B1 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6108044A (en) * 1997-04-10 2000-08-22 Samsung Electronics Co., Ltd. Receiver for receiving both HDTV and NTSC and method for selecting received signals
KR100286104B1 (en) * 1998-06-05 2001-04-16 윤종용 Noise removing circuit of image receiver
KR100428265B1 (en) * 2001-09-27 2004-04-28 한국전자통신연구원 Multiple data receiving control Method and Apparatus and transmission system by using a single port
KR100428603B1 (en) * 1998-11-30 2004-07-16 주식회사 대우일렉트로닉스 Method for displaying graphic data in the digital television
KR100492925B1 (en) * 1996-08-23 2005-11-01 소니 가부시끼 가이샤 Communication method, sending device, sending method, receiving device and receiving method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100492925B1 (en) * 1996-08-23 2005-11-01 소니 가부시끼 가이샤 Communication method, sending device, sending method, receiving device and receiving method
US6108044A (en) * 1997-04-10 2000-08-22 Samsung Electronics Co., Ltd. Receiver for receiving both HDTV and NTSC and method for selecting received signals
KR100286104B1 (en) * 1998-06-05 2001-04-16 윤종용 Noise removing circuit of image receiver
KR100428603B1 (en) * 1998-11-30 2004-07-16 주식회사 대우일렉트로닉스 Method for displaying graphic data in the digital television
KR100428265B1 (en) * 2001-09-27 2004-04-28 한국전자통신연구원 Multiple data receiving control Method and Apparatus and transmission system by using a single port

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