JPH05316447A - Television receiver - Google Patents

Abstract

PURPOSE:To allow a single TV receiver to have a function nearly similar to the plural number of TV receivers in the TV receiver which can select/display video signals from plural input sources incorporated or separated. CONSTITUTION:The TV receiver is provided with a selection means selecting the inputted video signal, a digital means which simultaneously synthesizes not less than two video signals outputted from the corresponding selection means and synthesizes/processes it as a multi-picture and a video signal processing means providing CRT with a video output from the digital synthesizing means. In the case of displaying plural pictures on a monitoring picture M, the digital synthesizing means digital-processes and outputs them so as to make respective displaying parts A to D to keep the aspect ratios of original images in the same size and an effective size to be maximum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and relates to a television receiver capable of selecting and displaying video signals of a plurality of input sources such as U / V tuner, BS tuner, and video input. It is a thing.

[0002]

2. Description of the Related Art With the increase of input sources such as U / V tuner, BS tuner, and video input, the functions of picture-in-picture, picture-out-picture, etc. are used to make the images of a plurality of different input sources identical. It can be displayed on the screen. The picture-in-picture function is a function of adding child screen information to the parent screen information and displaying a single or a plurality of child screens S on the parent screen M as shown in FIG. .. The picture-out-picture function can be used, for example, in Fig. 4 (b) on a widescreen HDTV with a 16: 9 aspect ratio.
As shown in FIG.
This is a function to display C and D. Further, as shown in FIG. 4C, there is also a picture-in-picture function capable of displaying vertically long two screens 1 and 2 having the same size.

[0003]

However, as shown in FIG.
In the case of the picture-in-picture function shown in (1), since the child screen S is overlapped and output on the parent screen M, the portion where the child screen S is displayed is missing from the parent screen M. Also for the picture-out-picture function shown in FIG. 4B, a plurality of child screens B, C, D to be displayed are displayed.
Is smaller than the parent screen A, and the amount of information on the child screen is extremely small. Further, in the conventional picture-in-picture function of the same size of two screens shown in FIG. 4C, the aspect ratios of the screens 1 and 2 are vertically long, and the display is not the conventional 4: 3. There is.

[0004]

The present invention has been made in order to solve such a problem, and it comprises a selecting means for selecting an input video signal and an output signal from the selecting means.
A digital synthesizing means for simultaneously inputting the above video signals and synthesizing as a multi-screen, and a video signal processing means for supplying the video signal output from the digital synthesizing means to a CRT are provided, and when displaying a plurality of screens, digital synthesizing is performed. The video signal input to the means is converted into a digital signal on the same screen with the same size and while maintaining the aspect ratio of the original screen, and combined to maximize the effective size of this combined screen. It is configured to output on the screen.

[0005]

Since the video signals of a plurality of input sources are displayed on the same screen in the same size with the aspect ratio maintained, the effective screen is maximized.
One television receiver can have almost the same functions as a plurality of television receivers.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, using the television receiver of the present invention, video signals of, for example, two types of input sources are displayed on the same screen in the same size with the aspect ratio maintained and the effective size maximized. An example of such a case will be described.

FIG. 1 is a block diagram showing the video circuit system of the television receiver of this embodiment. 1 in the figure
Indicates a U / V tuner, and 2 indicates a BS tuner for selecting broadcast radio waves. 3 is an intermediate frequency amplifier, 6 is U
/ V tuner 1, BS tuner 2, video deck (VTR) 4 connected to external terminals 4 multi-disc player (MDP) 5 etc.
Y / C decoder for inputting the color signal and the luminance signal, extracting the synchronizing signal, and the like. Reference numeral 7 denotes the luminance signal Y output from the Y / C decoder 5 and the color difference signals BY, R-
Matrix circuit that produces RGB signals of three primary colors from Y,
Reference numeral 9 denotes a V drive that outputs a vertical deflection current according to the vertical synchronization signal extracted by the Y / C decoder 5, and 10 denotes an H drive that outputs a horizontal deflection current according to the horizontal synchronization signal extracted by the Y / C decoder 5. As shown, the deflection current is supplied to the deflection yoke 11 of the CRT 12.

Reference numeral 13 denotes input terminals t1, t2, t3, t4,
A having output terminals ta and tb, selecting two types of video signals from four types of video signals from U / V tuner 1, BS tuner 2, VTR4, and MDP5, and outputting them to Y / C decoding D1 and D2, respectively. / V switch is shown. Each Y /
The C decodes D1 and D2 separate the color signal and the luminance signal in the same manner as the Y / C decode 6. D is a digital processor (DVP), which is equipped with A / D converters D3 and D4, a memory D5, a D / A converter D6, etc., digitizes the video signals from the Y / C decodes D1 and D2, and stores them in the memory D5. At the same time as storing, video data is read from the memory D5 so as to form a plurality of screens and output to the matrix circuit 14.

Reference numeral 8 denotes an R / G / B switch, which is switched so as to output RGB signals from the matrix circuit 7 in the case of a single screen output and from the matrix circuit 14 in the case of a plurality of screen outputs to display a plurality of screens. In the case of, the composite screen formed by the digital processor D is output via the matrix circuit 14.

Reference numeral 15 is the A / V switch 13, R / G
The / B switch 8, the digital processor D, etc., showing the CPU that controls via the control bus CB, the operation unit 1
6 or up / down of the volume control, channel selection, power on / off, screen switching, etc. are performed by operation signals input from the infrared ray receiving section 17 through the demodulating section 18.

According to the block diagram shown in FIG. 1, the same size and aspect ratio are maintained on the same screen.
A case will be described where the effective size of the screen display is maximized. For example, when the program selected by the BS tuner 2 and the program reproduced by the VTR 4 are displayed on the two screens, the R / G / B switch 8 is set in the matrix circuit 14
The video signal of the BS tuner 2 is switched from the input terminal t3 of the A / V switch 13 to the output terminal t.
A / D converter D3 in the digital processor D is separated into a color signal and a luminance signal by the Y / C decode D1 via a.
Is converted into a digital signal and stored in the memory D5.

The video signal of the VTR 4 is also Y / C through the input terminal t2 of the A / V switch 13 and the output terminal tb.
The color signal and the luminance signal are separated by the decoding D2, converted into a digital signal by the A / D converter in the digital processor D by D4, and stored in the memory D5.

In this way, the video signals of the BS tuner 2 and the VTR 4 which are digitized and stored in the memory D5 are displayed on the same screen at a predetermined read timing with reference to the vertical synchronizing signal of the Y / C decode 6. The data is read out as data to be displayed with the same size and aspect ratio, converted into an analog signal by the D / A converter D6, and output to the matrix circuit 14.

For example, port type field memories FMa and FM capable of simultaneously reading and writing the two systems of video signals Va and Vb shown in FIG. 2, respectively.
b, and then each field memory FMa, FMb
Are read out in the direction indicated by the dotted line at a clock frequency almost twice as high as that in writing, and are written in the field memory FM for composition.

A field memory FM for this composition
The data written in is read at a clock frequency corresponding to the normal horizontal and vertical frequencies synchronized with the scanning signal of the monitor screen, and is supplied to the D / A converter D6. The writing and reading timings of the respective field memories FMa and FMb are performed based on the synchronizing signals of the two systems of video signals Va and Vb, and the synthesizing field memory FM may be performed based on the synchronizing timing of the scanning signals. And D
The video signal converted by the / A converter D6 is output from the matrix circuit 14 to the CRT (CRT) 12 via the R / G / B switch 8.

A method of selecting two screens from a plurality of input sources is, for example, using the input source selected immediately before selecting the two-screen display as the main screen, and the video signal from the input source is A / V switched. The video signals of other input sources may be output from the output terminal ta of No. 13, and the signal processing may be performed as the data of the sub-screen from the output terminal tb as described above according to the user's arbitrary selection. Further, for example, when the user presets two types of input sources of his / her preference and selects the two-screen display, the image of the set input source may be output.

FIG. 3 is an explanatory diagram of a screen when the television receiver of this embodiment displays two types of screens. In the figure, M indicates a display part of a cathode ray tube, and A, B, C and D are displayed in the display part M so that the original aspect ratio is maintained and the effective size is maximized. The display unit displays images from different input sources. FIG. 3A is a diagram showing a case where screens A and B of the same size with a 4: 3 aspect ratio are displayed on the display unit M of a CRT having a 4: 3 aspect ratio so that the effective screen is maximized. .. FIG. 3B shows a case where normal broadcast screens A and B of the same size are displayed at the 4: 3 aspect ratio on the display unit M of the CRT for HDTV, which also has the aspect ratio of 16: 9. It is a figure.

The display portions A and B have the same size, and the aspect ratio is kept at 4: 3, and the background other than A and B in the display portion M has an arbitrary color such as blue. Can be selected. Regarding audio output, either A or B may be output as the main output from the speaker, and the other may be output to the external output such as headphones, or using two channels of LR. The left speaker may output the A sound, and the right speaker may output the B sound.

Further, by increasing the input of the digital processor D, it is possible to enable the four screen display of A, B, C and D as shown in FIGS. 3 (c) and 3 (d). .. FIG. 3C is a diagram when four screens of A, B, C, and D having the same size are output to the display unit M of the cathode ray tube having the aspect ratio of 4: 3 with the aspect ratio of 4: 3. FIG. 3 (d) shows a 16: 9 aspect ratio in the display section M of the CRT for HDTV.
It is a figure at the time of outputting 4 screens of A, B, C, and D of the same size with the aspect ratio of 9.

It is possible to display a U / V tuner 1 on A, a BS tuner 2 on B, a VTR 4 on C, and an MDP 5 on D, and one television receiver is equivalent to four. Can be displayed. In addition, U / V tuner 1
By providing two units, it is possible to output channel broadcasts having different VHF bands as two screens. Regarding audio output, as in the case of the two-screen display shown in FIGS. 3A and 3B, two screens may be arbitrarily selected from the four screens and output.

[0021]

As described above, in the television receiver of the present invention, the selecting means for selecting the inputted video signal and the two or more video signals outputted from the selecting means are simultaneously inputted and combined. By providing the digital synthesizing means and the video signal processing means for supplying the video signal output from the digital synthesizing means to the CRT, the digital synthesizing means can display the original aspect ratio with the same size when displaying a plurality of screens. Since it can be output and output to the monitor screen while maintaining the layout and maximizing the effective size on multiple screens, multiple different input sources such as a built-in or separate U / V tuner, BS tuner, VTR, etc. Image can be displayed on the same screen without omission, so that one TV receiver can There is an advantage of having almost the same function as that of the machine.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a television receiver of the present invention.

FIG. 2 is an explanatory diagram for digitally combining video signals.

FIG. 3 is an explanatory diagram of a multi-screen display according to the embodiment of this invention.

FIG. 4 is an explanatory diagram of a conventional multi-screen display.

[Explanation of symbols]

 6 Y / C decode 8 R / G / B switch 7,14 Matrix circuit 13 A / V switch D Digital processor D1, D2 Y / C decode D3, D4 A / D converter D5 memory D6 D / A converter FMa, FMb field memory FM synthesis field memory

Claims (2)

[Claims] 1. A television receiver capable of selecting and displaying video signals from a plurality of built-in or separate input sources, and selecting means for selecting the input video signals, and the selection means. The digital synthesizing means comprises digital synthesizing means for simultaneously inputting two or more video signals output from the means and performing synthesizing processing as a multi-screen, and video signal processing means for supplying the video output from the digital synthesizing means to a CRT. A television receiver characterized by arranging and outputting a plurality of input video screens so that the original image aspect ratio is maintained even with the same size and the effective size is maximized on a multi-screen. 2. The television receiver according to claim 1, wherein the aspect ratio of the composite screen output from the digital composition means is 16: 9.