KR100294233B1 - Digital tv set having aspect ratio conversion function - Google Patents

Digital tv set having aspect ratio conversion function Download PDF

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KR100294233B1
KR100294233B1 KR1019980013713A KR19980013713A KR100294233B1 KR 100294233 B1 KR100294233 B1 KR 100294233B1 KR 1019980013713 A KR1019980013713 A KR 1019980013713A KR 19980013713 A KR19980013713 A KR 19980013713A KR 100294233 B1 KR100294233 B1 KR 100294233B1
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signal
aspect ratio
digital
data
unit
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KR1019980013713A
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Korean (ko)
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KR19990080446A (en
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안덕용
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윤종용
삼성전자 주식회사
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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
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/0122—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal the input and the output signals having different aspect ratios
    • 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
    • H04N21/440263—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 by altering the spatial resolution, e.g. for displaying on a connected PDA
    • H04N21/440272—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 by altering the spatial resolution, e.g. for displaying on a connected PDA for performing aspect ratio conversion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems

Abstract

PURPOSE: A digital TV set having an aspect ratio conversion function is provided to compress data of each horizontal line as the data goes to a center, and to extend the data as the data goes to a start and an end point, to convert an aspect ratio, then to convert the aspect ratio by an HD(High Definition) display format to display the converted aspect ratio on a screen, so as to prevent an image from spreading over the screen. CONSTITUTION: A video signal converter(10) converts received composite video signals into a luminance signal(Y) and color difference signals(U, V), and outputs the converted signals. A horizontal compression extender(12) compresses data of each horizontal line included in video frames, which are composed of the luminance signal and the color difference signals, as the data goes to a center of the lines, and extends the data as the data goes to a start and an end point of the lines, to convert an aspect ratio. A format converter(14) converts an output signal of the horizontal compression extender(12) by a preset HD display format, and outputs the converted signal. A video output unit(16) receives the output signal of the format converter(14) to perform a predetermined signal processing, and displays the signal on a screen.

Description

화면비변환기능을 구비한 디지털ＴＶ수상기Digital TV Receiver with Aspect Ratio Conversion

본 발명은 아날로그신호 및 디지털신호의 수신이 가능한 디지털TV수상기에 관한 것으로서, 보다 상세하게는 내장한 튜너에서 수신된 NTSC신호나 외부기기를 통한 영상신호의 4:3 화면비를 소망하는 화면비로 변환하는 화면비변환기능을 구비한 디지털TV수상기에 관한 것이다.The present invention relates to a digital TV receiver capable of receiving analog and digital signals, and more particularly, to convert a 4: 3 aspect ratio of an NTSC signal received from an internal tuner or an image signal through an external device into a desired aspect ratio. A digital TV receiver having an aspect ratio conversion function.

요즘 개발중인 디지털TV수상기는 아날로그방송신호 및 디지털방송신호를 수신하여 소정의 데이터처리를 한후 복원된 영상을 화면상에 디스플레이하기 위한 TV수상기로서, 시스템의 완전(full) 디지털화를 지향하면서도 아날로그방송신호까지 신호처리할 수 있도록 하는 TV시스템이다. 또한, TV화면의 대형화, 및 다기능화 추세에 따라 화면의 현장감을 높일 수 있고, 와이드스크린의 종횡규격에 맞는 16:9의 화면비를 갖는 TV수상기를 채용하는 경향이 두드러지고 있다. 이러한 16:9의 화면비를 갖는 디지털TV수상기는, 수신되는 영상신호의 화면비가 16:9이면 이를 16:9의 화면비를 갖는 와이드스크린에 영상의 일그러짐 없이 그대로 출력한다.The digital TV receiver currently being developed is a TV receiver for receiving an analog broadcast signal and a digital broadcast signal and displaying a restored image on a screen after performing predetermined data processing. The analog TV signal is directed to full digitalization of the system. It is a TV system that enables signal processing. In addition, according to the trend toward larger and more versatile TV screens, there is a tendency to adopt a TV receiver having a 16: 9 aspect ratio that can increase the realism of the screen and fit the aspect ratio of the wide screen. When the aspect ratio of the received video signal is 16: 9, the digital TV receiver having the 16: 9 aspect ratio outputs the same to the wide screen having the aspect ratio of 16: 9 without distortion of the image.

하지만 전술한 디지털TV수상기는, 4:3의 화면비를 갖는 영상신호를 수신하여 16:9의 와이드스크린상에 그대로 디스플레이하면 수평으로 상퍼짐이 발생하는 문제점이 있다. 또한, 이 디지털TV수상기는 입력되는 영상신호의 4:3 화면비를 16:9의 화면비로 수평방향으로 동일한 비율로 확대하여 디스플레이하더라도 상퍼짐 현상이 해소되지 않는 문제점이 있다.However, the above-described digital TV receiver has a problem in that when a video signal having an aspect ratio of 4: 3 is received and displayed as it is on a 16: 9 wide screen, horizontal spreading occurs. In addition, the digital TV receiver has a problem in that the spreading phenomenon is not solved even when the 4: 3 aspect ratio of the input video signal is displayed at the same ratio in the horizontal direction at a 16: 9 aspect ratio.

전술한 문제점을 해결하기 위한 본 발명의 목적은, 수신되는 영상프레임에 포함된 각 수평라인의 데이터를 그 라인의 중앙으로 갈수록 데이터를 압축하고, 그 라인의 시작과 끝위치로 갈수록 데이터를 신장하여 화면비를 변환하고, 이를 디지털TV의 HD(high definition)디스플레이이 포맷으로 변환하여 스크린상에 디스플레이함으로써 수평으로 상퍼짐 현상이 없는 디지털TV수상기를 제공함에 있다.An object of the present invention for solving the above problems is to compress the data of each horizontal line included in the received image frame toward the center of the line, and to expand the data toward the start and end of the line The present invention provides a digital TV receiver which does not have a horizontal spreading phenomenon by converting an aspect ratio and converting it into a format of a high definition (HD) display of a digital TV and displaying it on a screen.

도 1은 본 발명의 바람직한 실시예에 따른 화면비변환기능을 구비한 디지털TV수상기의 개략적인 구성을 나타낸 구성도,1 is a block diagram showing a schematic configuration of a digital TV receiver having an aspect ratio conversion function according to an embodiment of the present invention;

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10 : 영상신호변환부 10a: A/V분리부10: video signal converter 10a: A / V separation unit

10b: 크로마디코더 10c: 선택출력부10b: Chromacoder 10c: Selective output

12 : 수평압축신장부 14 : 포맷변환부12: horizontal compression extension unit 14: format conversion unit

16 : 영상출력부 16a: OSGM16: video output unit 16a: OSGM

16b: RGB드라이버 16c: CRT16b: RGB driver 16c: CRT

전술한 목적을 달성하기 위한 본 발명의 화면비변환기능을 구비한 디지털TV수상기는, 아날로그신호 및 디지털신호의 수신이 가능한 디지털TV수상기에 있어서,수신되는 복합영상신호를 휘도신호(Y) 및 색차신호(U,V)로 변환하여 출력하는 영상신호변환부; 전술한 영상신호변환부로부터의 휘도신호 및 색차신호로 이루어진 영상프레임에 포함된 각 수평라인의 데이터를 그 라인의 중앙으로 갈수록 압축하고, 그 라인의 시작과 끝위치로 갈수록 데이터를 신장하여 화면비(aspect ratio)를 변환하는 수평압축신장부; 전술한 수평압축신장부로부터의 출력을 기설정된 디지털TV의 HD(high definition) 디스플레이 포맷으로 변환하여 출력하는 포맷변환부; 및 전술한 포맷변환부의 출력을 수신하여 소정의 신호처리를 한후, 화면상에 디스플레이하는 영상출력부를 포함한다.In the digital TV receiver having an aspect ratio conversion function of the present invention for achieving the above object, in a digital TV receiver capable of receiving analog signals and digital signals, the received composite video signal is a luminance signal (Y) and a color difference signal. A video signal conversion unit converting and outputting to (U, V); The data of each horizontal line included in the image frame composed of the luminance signal and the chrominance signal from the above-described image signal converter is compressed toward the center of the line, and the data is stretched toward the beginning and the end of the line to increase the aspect ratio ( a horizontal compression extension unit for converting aspect ratios; A format conversion unit for converting the output from the above-mentioned horizontal compression extension unit into a high definition (HD) display format of a digital TV and outputting the same; And an image output unit which receives the output of the above-described format conversion unit, performs predetermined signal processing, and displays the same on a screen.

이하, 첨부한 도1을 참조하여 본 발명에 따른 바람직한 일 실시예를 상세히 설명한다.Hereinafter, with reference to the accompanying Figure 1 will be described in detail a preferred embodiment according to the present invention.

도 1을 참조하면, 본 발명의 화면비변환기능을 구비한 디지털TV수상기는 수신되는 복합영상신호를 휘도신호(Y) 및 색차신호(U,V)로 변환하는 영상신호변환부(10)를 구비한다. 이 영상신호변환부(10)는 A/V분리부(10a)와 A/V분리부(10a)의 출력을 입력받는 크로마디코더(10b), 및 크로마디코더(10b)의 출력과 별도의 외부입력(Y,U,V)을 수신하여 선택적으로 출력하는 선택출력부(10c)를 포함한다. 그리고 영상신호변환부(10)는 A/V분리부(10a)의 출력단과 크로마디코더(10b)의 입력단 사이에 복합영상신호를 휘도신호(Y) 및 색신호(C)로 분리하는 콤필터(comb filter)를 더 구비할 수 있다.Referring to FIG. 1, a digital TV receiver having an aspect ratio conversion function of the present invention includes a video signal converter 10 for converting a received composite video signal into a luminance signal Y and a color difference signal U and V. FIG. do. The video signal conversion unit 10 is an external input separate from the output of the chroma decoder 10b and the chroma decoder 10b that receives the outputs of the A / V separation unit 10a and the A / V separation unit 10a. And a selection output unit 10c for receiving and selectively outputting (Y, U, V). The video signal converter 10 separates a complex video signal into a luminance signal Y and a color signal C between the output terminal of the A / V separation unit 10a and the input terminal of the chroma decoder 10b. filter) may be further provided.

영상신호변환부(10)에 구비된 A/V(Audio/Video; 10a)분리부는, 미도시한 튜너및IF신호처리부 또는 외부기기를 통해 입력되는 4:3의 화면비를 갖는 NTSC 복합영상신호중의 하나를 현재의 수신모드에 따라 선택하여 오디오신호 및 비디오신호를 분리하여 출력한다. 이때 A/V분리부(10a)의 외부입력단은 적어도 하나 이상이 될 수 있다. A/V분리부(10a)로부터 출력되는 오디오신호는 미도시한 음성신호처리부로 입력되고, 비디오신호는 크로마디코더(10b)로 입력된다. 이때 A/V분리부(10a)로부터 출력되는 영상신호가 휘도신호(Y) 및 색신호( C)로 분리된 영상신호이면 곧바로 크로마디코더(10b)로 입력되고, 복합영상신호이면 미도시한 콤필터(comb filter)로 입력된다. 콤필터는 입력되는 복합영상신호를 휘도신호와 색신호로 분리하여 크로마디코더(10b)로 출력한다. 크로마디코더(10b)는 휘도신호 및 색신호로 이루어진 영상신호를 입력받아 디코딩한후, 휘도신호(Y) 및 색차신호(U,V)로 변환하여 선택출력부(10c)로 출력한다. 선택출력부(10c)는 크로마디코더(10b) 또는 별도의 외부기기로부터의 휘도신호 및 색차신호로 이루어진 영상신호중의 하나를 현재의 수신모드에 따라 선택하여 수평압축신장부(12)로 출력한다. 여기서 선택출력부(10c)의 외부입력단은 적어도 하나 이상이 될 수 있다.The A / V (Audio / Video; 10a) separation unit included in the video signal converter 10 includes an NTSC composite video signal having a 4: 3 aspect ratio input through a tuner and an IF signal processor or an external device, not shown. One is selected according to the current reception mode, and the audio and video signals are separated and output. In this case, at least one external input terminal of the A / V separator 10a may be provided. The audio signal output from the A / V separation unit 10a is input to an audio signal processor, not shown, and the video signal is input to the chroma decoder 10b. In this case, if the video signal output from the A / V separation unit 10a is a video signal separated into the luminance signal Y and the color signal C, it is immediately input to the chroma decoder 10b, and if it is a composite video signal, the comb filter not shown. is entered as (comb filter). The comb filter separates the input composite video signal into a luminance signal and a color signal and outputs the result to the chroma decoder 10b. The chroma decoder 10b receives and decodes an image signal consisting of a luminance signal and a color signal, converts the image signal into a luminance signal Y and a color difference signal U and V, and outputs the same to the selection output unit 10c. The selection output unit 10c selects one of the image signals including the luminance signal and the color difference signal from the chroma decoder 10b or a separate external device according to the current reception mode, and outputs it to the horizontal compression extension unit 12. Here, at least one external input terminal of the selection output unit 10c may be provided.

수평압축신장부(12)는 선택출력부(10c)로부터의 휘도신호 및 색차신호로 이루어진 영상프레임에 포함된 각 수평라인의 데이터를 중앙으로 갈수록 압축하고, 그 라인의 시작과 끝위치로 갈수록 데이터를 신장한다. 이로써, 수평압축신장부(12)는 4:3화면비를 갖는 입력 영상프레임을 소정의 화면비(aspect ratio)를 갖는 영상프레임으로 변환하여 출력한다. 여기서, 소정의 화면비는 16:9화면비로 기설정할 수 있으며, 사용자인터페이스를 통한 사용자의 화면비전환모드선택에 따라 재설정가능하도록 설계된다.The horizontal compression extension unit 12 compresses the data of each horizontal line included in the image frame composed of the luminance signal and the color difference signal from the selection output unit 10c toward the center, and the data toward the start and end positions of the line. Elongate. As a result, the horizontal compression extension unit 12 converts an input image frame having a 4: 3 aspect ratio into an image frame having a predetermined aspect ratio and outputs the converted image frame. Here, the predetermined aspect ratio may be preset to a 16: 9 aspect ratio, and is designed to be reset according to the user's aspect ratio switching mode selection through the user interface.

수평압축신장부(12)의 출력은 포맷변환부(14)로 입력된다. 포맷변환부(14)는 수평압축신장부(12)로부터의 출력을 기설정된 디지털TV의 HD(high definition) 디스플레이 포맷으로 변환하여 영상출력부(16)로 출력한다.The output of the horizontal compression extension unit 12 is input to the format conversion unit 14. The format conversion unit 14 converts the output from the horizontal compression extension unit 12 into a preset HD (high definition) display format of the digital TV and outputs the output to the image output unit 16.

영상출력부(16)는 전술한 포맷변환부(14)의 출력을 수신하여 소정의 신호처리를 하여 화면상에 영상을 디스플레이한다. 이 영상출력부(16)는 OSGM(On Screen Graphics & Mixer; 16a)와 OSGM(16a)의 출력을 입력받는 RGB드라이버(16b) 및 RGB드라이버(16b)의 구동에 의한 영상을 디스플레이하는 CRT(16c)를 포함한다.The image output unit 16 receives the output of the above-described format conversion unit 14 and performs predetermined signal processing to display an image on the screen. The image output unit 16 is a CRT 16c for displaying an image by driving the RGB driver 16b and the RGB driver 16b that receive the outputs of the OSGM (On Screen Graphics &Mixer; 16a) and the OSGM 16a. ).

영상출력부(16)에 구비된 OSGM(16a)은 별도로 입력되는 문자 및 도형과 관련된 캡션데이터를 포맷변환부(14)로부터의 영상신호와 합성하여 RGB드라이버(16a)로 출력한다. RGB드라이버(16a)는 입력되는 영상의 원색신호(RGB)를 수평동기신호(H) 및 수직동기신호(V)에 따라 CRT(16c)의 스크린상에 디스플레이한다. 이로써, CRT(16c)의 스크린상에는 4:3화면비가 아닌 16:9화면비 또는 사용자에 의해 선택된 화면비를 갖는 영상신호가 수평으로 상퍼짐 현상없이 출력된다.The OSGM 16a included in the image output unit 16 synthesizes caption data related to characters and graphics separately input with the image signal from the format conversion unit 14 and outputs them to the RGB driver 16a. The RGB driver 16a displays the primary color signal RGB of the input image on the screen of the CRT 16c in accordance with the horizontal synchronizing signal H and the vertical synchronizing signal V. FIG. Thus, on the screen of the CRT 16c, an image signal having a 16: 9 aspect ratio or an aspect ratio selected by the user, rather than a 4: 3 aspect ratio, is output horizontally without a phenomenon of spreading.

전술한 바와 같이, 본 발명에 따른 화면비전환기능을 구비한 디지털TV수상기는 수신되는 영상프레임에 포함된 각 수평라인의 데이터를 그 라인의 중앙으로 갈수록 압축하고, 그 라인의 시작과 끝위치로 갈수록 데이터를 신장하여 화면비를 소망하는 화면비로 변환하고, 이를 디지털TV의 HD(high definition)디스플레이이 포맷으로 변환하여 스크린상에 디스플레이함으로써 수평으로 상퍼짐이 없는 고선명(HD)영상신호를 제공하는 효과를 갖는다.As described above, the digital TV receiver having the aspect ratio switching function according to the present invention compresses the data of each horizontal line included in the received image frame toward the center of the line, and toward the start and end of the line. The data is stretched to convert the aspect ratio to the desired aspect ratio, and the HD (high definition) display of the digital TV is converted into a format and displayed on the screen, thereby providing a high definition (HD) video signal without horizontal spreading. .

Claims (2)

아날로그신호 및 디지털신호의 수신이 가능한 디지털TV수상기에 있어서,In a digital TV receiver capable of receiving analog signals and digital signals, 수신되는 복합영상신호를 휘도신호(Y) 및 색차신호(U,V)로 이루어진 영상신호로 변환하여 출력하는 영상신호변환부;A video signal converting unit converting the received composite video signal into a video signal including a luminance signal Y and a color difference signal U and V and outputting the converted video signal; 상기 영상신호변환부로부터의 휘도신호 및 색차신호로 이루어진 영상프레임에 포함된 각 수평라인의 데이터를 그 라인의 중앙으로 갈수록 압축하고, 그 라인의 시작과 끝위치로 갈수록 데이터를 신장하여 화면비(aspect ratio)를 변환하는 수평압축신장부;Compress the data of each horizontal line included in the image frame composed of the luminance signal and the chrominance signal from the image signal conversion unit toward the center of the line, and expand the data toward the start and end positions of the line so that the aspect ratio horizontal compression extension for converting ratio; 상기 수평압축신장부로부터의 출력을 기설정된 디지털TV의 HD(high definition) 디스플레이 포맷으로 변환하여 출력하는 포맷변환부; 및A format converter for converting the output from the horizontal compression extension unit into a high definition (HD) display format of a preset digital TV and outputting the converted signal; And 상기 포맷변환부의 출력을 수신하여 소정의 신호처리를 한후, 화면상에 디스플레이하는 영상출력부를 포함하는 화면비변환기능을 구비한 디지털TV수상기.A digital TV receiver having an aspect ratio conversion function comprising an image output unit which receives an output of the format conversion unit, performs a predetermined signal processing, and displays the same on a screen. 제 1항에 있어서, 상기 수평압축신장부는 입력되는 영상프레임의 4:3 화면비를 16:9 화면비로 변환하는 것을 특징으로 하는 화면비변환기능을 구비한 디지털TV수상기.The digital TV receiver having an aspect ratio conversion function of claim 1, wherein the horizontal compression extension unit converts an 4: 3 aspect ratio of an input image frame into a 16: 9 aspect ratio.
KR1019980013713A 1998-04-17 1998-04-17 Digital tv set having aspect ratio conversion function KR100294233B1 (en)

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