KR100310047B1 - Device for inputting and outputting video signal of digital tv - Google Patents
Device for inputting and outputting video signal of digital tv Download PDFInfo
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- KR100310047B1 KR100310047B1 KR1019980011303A KR19980011303A KR100310047B1 KR 100310047 B1 KR100310047 B1 KR 100310047B1 KR 1019980011303 A KR1019980011303 A KR 1019980011303A KR 19980011303 A KR19980011303 A KR 19980011303A KR 100310047 B1 KR100310047 B1 KR 100310047B1
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- 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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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- 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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/641—Multi-purpose receivers, e.g. for auxiliary information
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- 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
- H04N9/78—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 for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter
Abstract
Description
본 발명은 디지털(Digital) TV에 관한 것으로, 보다 상세하게는, 고화질 (High Definition; HD)규격의 색신호(R,G,B)형식의 비디오신호를 외부기기와 입출력하기 위한 디지털 TV의 비디오신호 입출력장치에 관한 것이다.The present invention relates to a digital TV, and more particularly, to a video signal of a digital TV for inputting / outputting a video signal of a high definition (HD) standard color signal (R, G, B) format with an external device. It relates to an input / output device.
최근 디지털 추세에 맞추어 고화질(HD)의 디지털 방송이 곧 개시될 예정이다. 이 디지털 방송은 현재 통상적인 NTSC, PAL, SECAM등의 일반방송과 함께 이루어질 것이다. 그래서, 일반방송과 디지털 방송을 하나의 세트에서 수신하여 시청할 수 있는 TV시스템이 요구되어졌다. 이를 위하여 TV시스템내에 수신되는 일반방송신호를 TV수상기에 다스플레이가능토록 처리하는 구성블록, 수신되는 디지털 방송신호를 TV수상기에 디스플레이가능토록 처리하는 구성블록, 그리고 처리된 일반방송신호와 디지털 방송신호중 하나를 현재 시청모드에 따라 선택하여 TV수상기에 디스플레이하는 구성블록을 마련하므로써 일반방송과 디지털 방송을 모두 수신시청할 수 있도록 한다.In line with the recent digital trend, high-definition digital broadcasting will soon begin. This digital broadcast will now be accompanied by general broadcasts such as NTSC, PAL and SECAM. Therefore, there is a demand for a TV system capable of receiving and viewing general broadcast and digital broadcast in one set. To this end, a component block for processing a general broadcast signal received in a TV system to be displayed on a TV receiver, a component block for processing a received digital broadcast signal on a TV receiver, and a processed general broadcast signal and a digital broadcast signal By selecting one according to the current viewing mode and providing a configuration block to display on the TV receiver, it is possible to receive and receive both general and digital broadcasts.
현재, 이러한 디지털 TV 방송에 관한 표준화가 빠른 속도로 진전되고 있고 그중에는 구체적인 서비스를 시작한 것도 나오고 있다. 방송 서비스는 그 성격상 표준화의 중요성이 매우 높은 응용이다. 서비스면에서는 고화질, 고음질등의 엄격한 요구조건을 만족시키면서도 수상기를 적절한 가격으로 보급할 수 있어야 한다. 그리고, 영상포맷은 모든포맷에 대응하면서 컴퓨터등 기타미디어와의 정합성을 고려해야 한다.At present, the standardization of digital TV broadcasting is rapidly progressing, and among them, specific services have begun. Broadcast service is an application that is very important in standardization. In terms of service, it must be able to supply the water receiver at an appropriate price while satisfying the strict requirements such as high quality and high sound quality. In addition, the video format should be compatible with all other formats while considering the compatibility with all formats.
하지만, 지금까지 제시된 디지털 TV는 비디오신호형식이 하나로 고정되어 비디오신호형식이 다른 외부기기와 연결하여 사용하는 데 있어 제한이 있었다.However, the digital TV presented so far has a limitation in using the video signal format in connection with an external device having a different video signal format.
따라서, 본 발명의 목적은 전술한 점을 감안하여, 고화질(HD)규격인 1080i/33.75㎑(주사선수/라인주파수)의 적(R), 녹(G), 청(B) 색신호형식의 비디오신호를 디지털 TV와 외부기기간에 입출력가능토록 하여 다른 외부기기와의 연결이 용이하도록 하는 디지털 TV의 비디오신호 입출력장치를 제공함에 있다.Accordingly, an object of the present invention, in view of the above-mentioned point, video of red (R), green (G), blue (B) color signal format of 1080i / 33.75 kHz (scanner / line frequency), which is a high definition (HD) standard. The present invention provides a video signal input / output device of a digital TV that enables input and output of a signal to a digital TV and external periods so that connection with other external devices can be easily performed.
제1도는 본 발명이 적용된 디지털 TV의 일실시예를 나타내는 구성도.1 is a block diagram showing an embodiment of a digital TV to which the present invention is applied.
제2도는 본 발명이 적용된 디지털 TV의 다른 실시예를 나타내는 구성도.2 is a block diagram showing another embodiment of a digital TV to which the present invention is applied.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
11 : 중앙처리부(CPU) 12 : 포맷변환기11 central processing unit 12 format converter
13 : OSGM 14 : CRT구동기13: OSGM 14: CRT driver
15 : CRT 16 : RGB변환기15: CRT 16: RGB converter
17 : D/A변환기 18, 19 : 외부입출력단자17: D / A converter 18, 19: external I / O terminal
20 : A/D변환기 21 : YPRPB변환기20: A / D converter 21: YP R P B converter
이와 같은 목적을 달성하기 위한 본 발명의 디지털 TV의 비디오신호 입출력 장치는, 디지털 TV에 있어서, 외부기기와 연결하여 비디오신호를 입출력하기 위한 외부입출력단자와, 수신된 방송신호의 시청가능토록 복원된 비디오데이타를 미리 설정된 디스플레이규격으로 포맷 변환하여 휘도신호(Y)와 두 색차신호(PR,PB)형식으로 출력하기 위한 포맷변환기와, 상기 포맷변환기에서 포맷 변환된 휘도신호(Y)와 두 색차신호(PR,PB)형식의 디지털 비디오데이타를 색신호(R,G,B)형식으로 변환하기 위한 RGB변환기와, 상기 RGB변환기에서 변환된 색신호(R,G,B)형식의 디지털 비디오 데이타를 아날로그형태로 변환하여 상기 외부출력단자에 연결된 외부기기로 출력하기 위한 D/A변환기와, 상기 포맷변환기에서 포맷 변환된 휘도신호(Y)와 두 색차신호(PR,PB)형식의 디지털 비디오데이타에 화면에 나타낼 부가정보를 삽입하여 색신호(R,G,B)형식의 아날로그 비디오신호로 출력하는 OSGM, 및 상기 외부입력단자에 연결된 외부기기로부터 입력되는 색신호(R,G,B)형식의 아날로그 비디오신호와 상기 OSGM의 출력중 하나에 의해 구동되어 화면출력하는 CRT구동기를 포함한다.In order to achieve the above object, a video signal input / output device of a digital TV according to the present invention includes an external input / output terminal for inputting / outputting a video signal by connecting to an external device and restoring the received broadcast signal for viewing. A format converter for converting the video data into a predetermined display standard and outputting the luminance signal Y and the two color difference signals P R and P B , and the luminance signal Y and the format converted by the format converter. An RGB converter for converting digital video data of a color difference signal (P R , P B ) format to a color signal (R, G, B) format, and digital video of a color signal (R, G, B) format converted by the RGB converter A D / A converter for converting data into an analog form and outputting the data to an external device connected to the external output terminal, and a format of a luminance signal Y and two color difference signals P R and P B converted by the format converter. OSGM outputting analog video signal of color signal (R, G, B) format by inserting additional information to be displayed on screen in digital video data, and color signal (R, G, B) input from external device connected to the external input terminal. And a CRT driver driven by one of the output analog video signals and the output of the OSGM.
이하, 첨부한 도면들을 참조하여 본 발명의 바람직한 실시예를 상세히 기술하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명이 적용된 디지털 TV의 일실시예를 나타내는 구성도로서, 일반적인 디지털 TV의 구성을 모두 포함하며, 포맷변환기(12)와 OSGM(0n Screen Graphic Mixer)(13) 사이에 포맷 변환된 고화질(HD)규격의 휘도신호(Y)와 두 색차신호(PR,PB)형식의 디지털 비디오데이타를 외부기기의 비디오신호형식에 맞도록 색신호(R,G,B)형식으로 변환하기 위한 RGB변환기(16)와, 색신호(R,G,B)형식의 디지털 비디오데이타를 아날로그형태로 변환하기 위한 D/A변환기(17), 및 외부기기와 연결되어 D/A변환기(17)에서 아날로그 변환된 고화질(HD)규격의 비디오신호를 연결된 외부기기로 출력하기 위한 외부출력단자(18)를 추가로 포함한다. 또한, 외부기기와 연결되어 외부기기로부터 색신호(R,G,B)형식의 아날로그 비디오신호를 입력받기 위한 외부입력단자(19)와, 외부입력인 아날로그 비디오신호를 디지털 형태로 변환하기 위한 A/D변환기(20), 및 A/D변환기(20)에서 디지털 변환된 색신호(R,G,B)형식의 비디오데이타를 휘도신호(Y)와 두 색차신호(PR,PB)형식으로 변환하여 OSGM(13)으로 출력하는 YPRPB변환기(21)를 추가로 포함한다.1 is a block diagram showing an embodiment of a digital TV to which the present invention is applied, and includes all the configurations of a general digital TV, and is converted between a format converter 12 and an OSN (0n Screen Graphic Mixer) 13. For converting digital video data in the form of high definition (HD) luminance signal (Y) and two color difference signals (P R , P B ) into color signal (R, G, B) format to match the video signal format of the external device. RGB converter 16, D / A converter 17 for converting digital video data of color signal (R, G, B) format into analog form, and D / A converter 17 connected to an external device It further includes an external output terminal 18 for outputting the converted video signal of the high definition (HD) standard to the connected external device. In addition, it is connected to an external device, an external input terminal 19 for receiving an analog video signal of a color signal (R, G, B) format from an external device, and A / for converting an analog video signal, which is an external input, into a digital form. Converts the video data of the color signal (R, G, B) format digitally converted by the D converter 20 and the A / D converter 20 into a luminance signal Y and two color difference signals P R and P B. And an YP R P B converter 21 for outputting to the OSGM 13.
한편, 도 2는 본 발명이 적용된 디지털 TV의 다른 실시예를 나타내는 구성도로서, 도 1 실시예의 A/D변환기(20)와 YPRPB변환기(21)를 구비하지 않는 구성과 동일하며, 대신 OSGM(13)과 CRT구동기(14) 사이에 외부입력을 받도록 외부입력단자(19)를 통해 외부기기로부터 입력되는 색신호(R,G,B)형식의 아날로그 비디오신호를 바로 CRT구동기(14)로 출력하도록 구성된다. 이러한 구성들을 갖는 도 1 및 도 2 디지털 TV의 비디오신호 입출력동작을 좀더 구체적으로 설명한다.2 is a configuration diagram showing another embodiment of the digital TV to which the present invention is applied, which is the same as the configuration without the A / D converter 20 and the YP R P B converter 21 of FIG. Instead, the CRT driver 14 directly converts an analog video signal of a color signal (R, G, B) type from an external device through an external input terminal 19 to receive an external input between the OSGM 13 and the CRT driver 14. Is configured to output. The video signal input / output operations of Figs. 1 and 2 digital TVs having these configurations will be described in more detail.
통상의 디지털 TV는, 수신되는 디지털 방송신호 및 일반방송신호를 CRT(15)에 디스플레이가능토록 처리하며, 그중 하나를 현재의 시청모드에 따라 선택하여 CRT(15)에 디스플레이한다. 이때, 포맷변환기(12)는 시청가능토록 복원된 디지털 방송신호의 비디오데이타 또는 일반방송신호의 비디오데이타를 인가받아 미리 설정된 디스플레이규격으로 포맷 변환하여 OSGM(13)으로 출력한다. 포맷변환기(l2)의 출력은 고화질(HD)규격인 1080i(Interlace)/33.75㎑(주사선수/라인주파수)의 휘도신호(Y)와 두 색차신호(PR,PB)형식의 디지털 비디오데이타이다. 포맷변환기(12)에서 포맷 변환된 비디오데이타는 OSGM(13)뿐만 아니라 외부기기로의 출력을 위해 RGB변환기(16)로도 입력된다. RGB변환기(16)는 포맷변환기(12)에서 포맷 변환된 고화질(HD)규격의 휘도신호(Y)와 두 색차신호(PR,PB)형식의 디지털 비디오데이타를 그 외부기기의 비디오신호형식에 맞도록 적(R), 녹(G), 청(B) 색신호형식으로 변환하여 D/A변환기(17)로 출력한다. D/A변환기(17)는 색신호(R,G,B)형식의 디지털 비디오데이타를 아날로그형태로 변환하여 외부출력단자(18)에 연결된 외부기기로 출력한다. 여기에서 외부기기는 퍼스널컴퓨터(PC)와 같이 비디오신호의 입력형식이 적(R),녹(G),청(B) 색신호인 경우로, 디지털 TV 와의 다른 외부기기도 고화질(HD)규격의 비디오신호를 공급받을 수 있게 된다. 반면, 외부입력단자(19)에 연결된 외부기기로부터 적(R), 녹(G), 청(B) 색신호형식의 아날로그 비디오신호가 입력되면, A/D변환기(20)는 외부입력인 아날로그 비디오신호를 일단 디지털형태로 변환한다. YPRPB변환기(21)는 A/D변환기(20)에서 디지털 변환된 색신호(R,G,B)형식의 비디오데이타를 입력받아 OSGM(13)에서 처리가능한 형식인 휘도신호(Y)와 두 색차신호(PR,PB)형식의 디지털 비디오데이타로 변환하여 OSGM(13)으로 출력한다. OSGM(13)은 포맷 변환된 비디오데이타 또는 YPRPB변환기(21)에서 변환된 비디오데이타에 중앙처리부(CPU)(11)를 통해 인가되는 화면에 나타낼 부가정보를 삽입하여 적(R), 녹(G), 청(B) 색신호형식의 아날로그 비디오신호로 CRT구동기(14)에 출력한다. 여기서, CPU(11)는 미도시되어 있지만, 디지털 TV대의 각구성블록의 동작을 전반적으로 제어한다. CRT구동기(14)는 OSGM(13)의 출력에 의해 구동되어 CRT(15)에 사용자에 의해 선택된 방송의 영상 또는 외부기기에서 입력된 비디오의 영상을 화면 출력한다.A normal digital TV processes the received digital broadcast signal and the general broadcast signal to be displayed on the CRT 15, and selects one of them according to the current viewing mode and displays them on the CRT 15. At this time, the format converter 12 receives the video data of the digital broadcast signal restored to viewable or the video data of the general broadcast signal, converts the format into a preset display standard, and outputs it to the OSGM 13. The output of the format converter l2 is digital video data in the form of a luminance signal (Y) of 1080i (Interlace) /33.75 kHz (scanner / line frequency), which is a high definition (HD) standard, and two color difference signals (P R , P B ). to be. The video data converted in the format converter 12 is input not only to the OSGM 13 but also to the RGB converter 16 for output to an external device. The RGB converter 16 converts the digital video data of the high-definition (HD) standard luminance signal Y and the two color difference signals P R and P B format converted by the format converter 12 into the video signal format of the external device. The red, green, and blue color signals are converted into the D / A converter 17 so as to be matched with each other. The D / A converter 17 converts digital video data of the color signal (R, G, B) format into an analog form and outputs it to an external device connected to the external output terminal 18. Here, the external device is a case where a video signal input format is a red (R), green (G), blue (B) color signal like a personal computer (PC). The video signal can be supplied. On the other hand, when an analog video signal of red (R), green (G), and blue (B) color signal format is input from an external device connected to the external input terminal 19, the A / D converter 20 is analog video as an external input. First convert the signal to digital form. The YP R P B converter 21 receives the video data of the color signal (R, G, B) format digitally converted from the A / D converter 20 and the luminance signal Y which is a format that can be processed by the OSGM 13; Two color difference signals (P R and P B ) are converted into digital video data and output to the OSGM 13. The OSGM 13 inserts additional information to be displayed on the screen applied through the central processing unit (CPU) 11 into the format converted video data or the video data converted by the YP R P B converter 21 so that the enemy (R), An analog video signal of green (G) and blue (B) color signal format is output to the CRT driver 14. Here, although not shown, the CPU 11 generally controls the operation of each component block of the digital TV set. The CRT driver 14 is driven by the output of the OSGM 13 to output the video of the broadcast selected by the user or the video of the video input from an external device to the CRT 15.
한편, 도 2를 보면, 도 1의 A/D변환기(20)와 YPRPB변환기(21)를 구비하지 않는 대신에 외부입력단자(19)와 CRT구동기(14)를 바로 연결한다. 그래서, 외부입력단자(19)에 연결된 외부기기로부터 적(R), 녹(G), 청(B) 색신호형식의 아날로그 비디오신호가 입력되면, CRT구동기(14)는 도 1에서 처럼, OSGM(13)의 출력뿐만 아니라 외부입력인 아날로그 비디오신호에 의해 구동되어 CRT(15)에 외부입력의 영상을 화면 출력한다.Meanwhile, referring to FIG. 2, instead of the A / D converter 20 and the YP R P B converter 21 of FIG. 1, the external input terminal 19 and the CRT driver 14 are directly connected. Thus, when an analog video signal of red (R), green (G), and blue (B) color signal format is input from an external device connected to the external input terminal 19, the CRT driver 14, as shown in FIG. In addition to the output of 13), it is driven by an analog video signal, which is an external input, and outputs an image of an external input to the CRT (15).
상술한 바와 같이, 본 발명의 디지털 TV의 비디오신호 입출력장치는, 디지털 TV에서 고화질(HD)규격인 1080i/33.75㎑(주사선수/라인주파수)의 색신호(R,G,B)형식의 비디오신호를 외부기기로 출력 및 외부기기로부터 입력받아 화면 출력할 수 있도록 하므로써, 디지털 TV의 외부입출력을 확장시켜 사용범위를 넓힐 수 있는 효과를 갖는다.As described above, the video signal input / output device of the digital TV of the present invention is a video signal of a color signal (R, G, B) format of 1080i / 33.75 kHz (scanner / line frequency), which is a high definition (HD) standard, in a digital TV. By outputting to the external device and input from the external device to output the screen, it has the effect of extending the external input and output of the digital TV to extend the range of use.
Claims (3)
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| JPH066763A (en) * | 1992-06-18 | 1994-01-14 | Sony Corp | Television image receiver |
| US5289277A (en) * | 1992-11-05 | 1994-02-22 | Zenith Electronics Corp. | High definition television signal format converter |
| US5493413A (en) * | 1989-09-07 | 1996-02-20 | Advanced Television Test Center | Multiple HDTV format digital signal converter for converting an HDTV format to a format recordable on a digital video recorder/player |
| JPH08111827A (en) * | 1994-10-12 | 1996-04-30 | Sony Corp | Television receiver |
| JPH08321997A (en) * | 1995-05-25 | 1996-12-03 | Sony Corp | Television receiver |
| JPH08340550A (en) * | 1996-07-15 | 1996-12-24 | Hitachi Ltd | Digital television signal processor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5493413A (en) * | 1989-09-07 | 1996-02-20 | Advanced Television Test Center | Multiple HDTV format digital signal converter for converting an HDTV format to a format recordable on a digital video recorder/player |
| JPH066763A (en) * | 1992-06-18 | 1994-01-14 | Sony Corp | Television image receiver |
| US5289277A (en) * | 1992-11-05 | 1994-02-22 | Zenith Electronics Corp. | High definition television signal format converter |
| JPH08111827A (en) * | 1994-10-12 | 1996-04-30 | Sony Corp | Television receiver |
| JPH08321997A (en) * | 1995-05-25 | 1996-12-03 | Sony Corp | Television receiver |
| JPH08340550A (en) * | 1996-07-15 | 1996-12-24 | Hitachi Ltd | Digital television signal processor |
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