JPH05328271A - Ntsc up-converter - Google Patents

Abstract

PURPOSE:To fully utilize a wide angle large screen of a High Vision display device by providing a synthesis pattern generating circuit reducing and synthesizing 7 kinds of current NTSC system television signals respectively to the converter so as to display 7 kinds of video signals in a form of a moving picture. CONSTITUTION:Seven kinds of current NTSC system video signals whose aspect ratio is 4: 3 are subjected 1/4 reduction into 4 patterns 12-15 and subjected to 1/9 reduction into 4 patterns 16-18 in total 7 patterns through reduction synthesis and they are displayed on the entire display screen 11 of a High Vision display device whose aspect ratio is 16:9 in a form of moving picture. That is, the patterns are made up of moving patterns 12-15 reduced into 1/4 whose aspect ratio is 4:3 and moving patterns 16-18 reduced into 1/9 whose aspect ratio is 4:3. For example, when the 7 patterns are displayed on a 36-inch High Vision screen, each of the 174 reduction patterns 12-15 has nearly 15 inches wide and each of the 1/9 reduction patterns 16-18 has nearly 10 inches wide and the picture practically sufficient is obtained respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for multi-screen display of current NTSC television signals in a high-definition television receiver.

[0002]

2. Description of the Related Art High-definition broadcasting by satellite broadcasting displays a detailed high-definition image on a large screen with a wide viewing angle, and a new television system pursuing power and presence by adopting a 4-channel stereo audio signal. Is. This high-definition system has a wide / high-definition screen with an aspect ratio of 16: 9 and 1125 scanning lines, which is different from the video signal of the current NTSC system (aspect ratio 4: 3, 525 scanning lines). The NTSC up-converter is a signal for converting a video signal of the current NTSC system so that it can be displayed on a high-definition display, and its schematic configuration diagram is shown in FIG. In FIG. 3, 41 is an input terminal of the current NTSC video signal, 42 is a color demodulation unit, 43 is an A / D converter, 44 is a signal conversion unit, 45 is a D / A converter, 46 is an RGB matrix,
47 is an output terminal. First, the input video signal is converted into a luminance signal and a color difference signal by the color demodulation circuit 42 and then separated.
It is digitized by the D converter 43. The digitized video signal is subjected to double speed conversion, time compression, etc. in the signal conversion unit 44 and converted into a digital video signal having a horizontal frequency of 31.5 KHz and an aspect ratio of 4: 3 which can be displayed on a high-definition display. This signal is converted into an analog signal for each of the luminance signal and the color difference signal in the D / A converter 45, and becomes an RGB video signal in the RGB matrix 46,
It is connected to the high-definition display via the output terminal 47. FIG. 4 is a diagram showing a state in which an image of the current NTSC video signal signal-converted by the above-mentioned NTSC up converter is displayed on a high-definition display. In FIG. 4, 51 is a high-definition display screen with an aspect ratio of 16: 9. When displaying a current NTSC video signal with an aspect ratio of 4: 3, the difference in aspect ratio causes
The display is as shown in (B). That is, if the vertical lengths of the screens are matched, the image of FIG. Further, if the horizontal lengths of the screens are matched, the image shown in FIG. 4 (B) 53 is obtained, and there is a problem that the upper and lower hatched portions of the current NTSC video signal are projected and missing from the display screen. Therefore,
Naturally, the screen of the NTSC up-converter cannot take advantage of the wide screen features of the high-definition display.

On the other hand, with the start of the full-scale multi-channel era due to the start of CS broadcasting following BS broadcasting by satellite, and the increase in the number of packaged media such as VTR and VD with a built-in tuner, the video information surrounding the viewers is Increasingly rich and diverse. Under these circumstances, NTSC
In the case of an image viewed on a high-definition display using an up-converter, it does not necessarily have to be a large screen, and a multi-screen, a moving image is displayed over the entire screen including the above-mentioned non-displayed part without a signal, and a lot of information is displayed at the same time. There was a request to get.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an NTSC up-converter is used to convert an aspect ratio of an existing NTSC television signal.
When displaying on a 16: 9 high-definition display,
The present invention provides an NTSC up-converter capable of displaying 7 screens, that is, 4 screens that are reduced to 1/4 and 3 screens that are reduced to 1/9 on all display surfaces of a high-definition display.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an NTSC-up system in which a current NTSC television signal is subjected to signal conversion such as scanning conversion to be received by a high-definition television receiver having a different aspect ratio. In the converter, a composite screen generation circuit for reducing and composing each of seven types of current NTSC television signals is provided.
7 with 4 screens reduced by a factor of 1 and 3 screens reduced by a factor of 9
The present invention provides an NTSC up-converter in which a screen is displayed on the high-definition television receiver.

[0006]

With the above structure, the NT according to the present invention
In the SC up-converter, seven kinds of current aspect ratio 4: 3 NTSC video signals are reduced and combined into seven screens, that is, four screens that are reduced to 1/4 and three screens that are reduced to 1/9. , A movie is displayed on the entire display surface of a high-definition display with an aspect ratio of 16: 9.

[0007]

The NTSC according to the present invention will now be described with reference to the drawings.
An example of the up-converter will be described. FIG. 1 is a diagram showing a state in which a video signal output from an NTSC up converter according to an embodiment of the present invention is displayed as an image on a high-definition display. In FIG. 1, 11 is a display surface of a high-definition display (aspect ratio 16: 9). 12 ~ 15
Is a moving image with an aspect ratio of 4: 3, which is a reduced display of the current NTSC system television signal by a quarter. Reference numerals 16 to 18 are moving pictures with an aspect ratio of 4: 3, which are reduced display of the current NTSC television signals by a factor of 9, respectively. Now, for example, if seven screens according to the present invention are displayed on a 36-inch high-definition screen, the quarter-reduced screens are approximately 15 inches, and the one-nineth reduced screens are approximately 10 inches, respectively, which is sufficiently practical. Images can be obtained. In the present embodiment, the left side and the right side of the screen have four reduced screens and three reduced screens, respectively. However, the left and right sides may be reversed.

FIG. 2 is a block diagram of essential parts showing a schematic configuration of the NTSC up-converter according to the present invention. In FIG. 2, reference numeral 21 is an input terminal for inputting seven kinds of current NTSC video signals, and 22 is a four-fold reduction of the input video signal to 1/4.
A changeover switch for selectively selecting one of three types of video signals and three types of video signals reduced to 1/9, and 23 is a luminance signal (Y signal) and a color difference signal (BY, RY) for the input video signals, respectively.
A signal processing unit for converting and separating into a signal), 24 is an A / D converter for converting the luminance signal and the color difference signal into digital signals, respectively, and 25 is a four-screen combining unit for converting the digitized video data into four screens. Similarly, 26 is an input signal processing unit, 27 is an A / D converter, and 28 is a three-screen combining unit. 29 is a 7-screen synthesizing unit that synthesizes and outputs 7-screen video data from the signals output by the 4-screen synthesizing unit 25 and 3-screen synthesizing unit 28, and 30 is a luminance signal of the video data output by the 7-screen synthesizing unit 29. , D / that converts each color difference signal into an analog signal
An A converter 31 is an RGB matrix circuit which converts the same luminance signal and color difference signal into RGB video signals and outputs them to a high-definition display. A control unit 32 controls selection and replacement of seven screens.

Next, the operation of the NTSC up converter according to the present invention will be described. 7 types of current NT from multiple built-in tuners and VTRs connected to input terminal 21
The SC system video signal is instructed by the control unit 32 by the changeover switch 22 to be reduced to 1/4 and 4 types of video signals and 1/9.
And three types of reduced video signals are selected. First, the four types of video signals are separated into a luminance signal and a color difference signal by an input signal processing unit 23, digitized by an A / D converter 24, and sent to a 4-screen combining unit 25. In the four-screen synthesizing unit 25, horizontal / vertical signal thinning-out, double speed conversion, horizontal compression, time compression, etc. are processed and converted into digital signals of four screens each having an aspect ratio of 4: 3 shown in FIGS. .. On the other hand, the three types of video signals are input to the three-screen combining unit 28 via the input signal processing unit 26 and the A / D converter, and the aspect ratios 4: 3 shown in FIGS.
Are converted into digital signals of 3 screens. The 4-screen digital signal and 3-screen digital signal are combined into a 7-screen combining section.
The image is combined in 29, converted into RGB video signals through the D / A converter 30 and the RGB matrix circuit 31, outputted to the high-definition display, and combined and displayed on 7 screens as shown in FIG. If desired, the viewer controls the changeover switch 22 and the 7-screen synthesizing unit 29 via the control unit 32 to switch display images to each other and select them.

The NTSC up-converter may be a built-in type built in the high-definition receiver or an adapter type.

[0011]

As described above, the N according to the present invention is
Aspect ratio of 16:
9 high-definition displays and 7 types of current NTSC
The system video signal can be displayed as a moving image. Therefore, when a plurality of pieces of video information are desired to be obtained at the same time, there is an effect that the feature of the wide-angle large screen of the high-definition display can be fully utilized. Further, the display images can be interchanged and selected by the viewer's request by operating the remote controller or the like.

[Brief description of drawings]

FIG. 1 is a diagram showing a display state of a high-definition television receiver according to an embodiment of the present invention.

FIG. 2 is a principal block diagram showing a schematic configuration of an NTSC up converter according to the present invention.

FIG. 3 is a principal block diagram showing a schematic configuration of a conventional NTSC up converter.

FIG. 4 Current N by conventional NTSC up-converter
FIG. 4A shows a state in which a TSC system video signal is displayed on a high-definition receiver, and FIG. 4A shows the same vertical length of the screen, and FIG. 4B shows the same horizontal length of the screen. It is the figure which was made to display.

[Explanation of symbols]

 11 High-definition display screen 12 1/4 reduced screen 13 1/4 reduced screen 14 1/4 reduced screen 15 1/4 reduced screen 16 1/9 reduced screen 17 1/9 reduced screen 18 9 min 1 reduced screen 21 input terminal 22 changeover switch 23 input signal processing unit 24 A / D converter 25 4 screen synthesis unit 26 input signal processing unit 27 A / D converter 28 3 screen synthesis unit 29 7 screen synthesis unit 30 D / A converter 31 RGB matrix 32 Control unit

Claims (3)

[Claims] 1. An NTSC up-converter adapted to convert a current NTSC television signal into a high-definition television receiver having a different aspect ratio by performing signal conversion such as scanning conversion, and reduces each of the seven types of current NTSC television signals. Provide a synthetic screen generation circuit to synthesize,
An NTSC up-converter characterized in that 7 screens of 4 screens reduced to 1/4 and 3 screens reduced to 1/9 are displayed on the high-definition receiver. 2. The at least seven screens for reduction are at least the four screens.
The NTSC up-converter according to claim 1, wherein four reduced screens are displayed in a moving image. 3. The NTSC up-converter according to claim 2, wherein the NTSC up-converter is a high-definition receiver built-in type or an adapter type.