JPH07107412A - Television receiver - Google Patents

Abstract

PURPOSE:To prevent the drop-out the picture on a slave screen by shifting the display position of the slave screen inward even in the case of the zoom mode accompanied with deflection width extension in the vertical direction. CONSTITUTION:A video signal system 30 is provided with a video signal processor 31, a Y/C separation circuit 32 for master screen, a signal processing circuit (PinP) 33 for slave screen, and an MPU 34 for picture frame formation, and they are controlled by an MPU 41 for system. A composite video signal Vs for slave screen is separated and demodulated into a luminance signal and color difference signals by the circuit 33, and they are subjected to prescribed processing and are supplied to the MPU 31 together with the blanking signal which controls the display position and the size of the slave picture. The MPU 34 generates a blanking signal S34 which cuts an unnecessary part in the normal or zoom mode. If a part of the slave screen will be dropped out, the MPU 41 shifts the display position to display the slave screen on the master screen within the screen of a receiver 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontally long screen television receiver having a parent-child screen (so-called PinP) function.

[0002]

As is well known, in the current television standard system (NTSC system), the aspect ratio of the screen is set to 4: 3. In addition, in the newly proposed high definition television (high definition) system,
The aspect ratio is set to 16: 9, and the screen is horizontally longer than the NTSC system.

In recent years, a horizontal screen television receiver, which is commonly referred to as a horizontal TV or a wide TV, that employs a picture tube having an aspect ratio of 16: 9 and is compatible with the NTSC system has come to be commercially available. .

In this wide television, an NTSC normal image Pn having an aspect ratio of 4: 3 as shown in FIG. 5A is displayed on a wide tube surface Scw of a picture tube having an aspect ratio of 16: 9 as shown in FIGS. 6A, and the normal image Pn as shown in FIG. 6A can also be displayed as shown in FIG. 6B.

That is, in the case of FIG. 5B, the normal image Pn having an aspect ratio of 4: 3 is enlarged only in the horizontal direction,
Both the horizontal and vertical directions are displayed in a wide tube surface Scw with an aspect ratio of 16: 9. In this case, the image will be horizontally elongated. In this specification, a mode in which an image is displayed in a wide tube surface Scw in both horizontal and vertical directions is called a wide mode.

Further, in the case of FIG. 5C, a wide tube surface Scw
As shown by the chain line in the figure, the normal image Pn is displayed in the central portion of the screen with the aspect ratio of 4: 3, and in the vertical direction to fill the tube surface Scw, and the fidelity of the original image is maintained. . In this case, non-image portions are formed at both left and right ends of the tube surface Scw, as shown by the hatched lines in FIG. In this specification, as described above, in the wide tube surface Scw, while keeping the aspect ratio of 4: 3, only in the vertical direction, the tube surface Scw is full,
A mode in which a normal image is displayed is called a normal mode.

In the case of FIG. 6, the normal image Pn as shown in FIG. 6A is a ratio (4/3) of the aspect ratio of the wide tube surface Scw to the normal image Pn as shown by the broken line Pz in FIG. ), It is expanded in both horizontal and vertical directions, and 4:
While maintaining the aspect ratio of 3, the wide tube surface Scw is fully displayed in the horizontal direction to maintain the fidelity of the image. In this case, in the vertical direction, as shown by the dotted line in FIG. 6B, the image frame is enlarged more than the wide tube surface Scw, and a part of the original image in the vertical direction is missing.

In this specification, as shown in FIG. 6B,
In the vertical mode, the image frame is enlarged compared to the wide tube surface Scw, the aspect ratio remains 4: 3, and the normal image is displayed on the wide tube surface fully in the horizontal direction in the zoom mode. Call.

In the case of FIG. 6, when the normal image Pn of FIG. 6A is a so-called Vista-size or cinema-size, letterbox format horizontally long software, FIG.
As shown by the parallel diagonal lines, the non-image parts formed above and below the image are driven out of the wide tube surface Scw, and only the desired image can be displayed on the full screen. The sense of presence is enhanced.

Further, in the letterbox type software, since the position of the image is different depending on the software, the center of enlargement in the vertical direction cannot be fixed. For this reason,
In the wide television, in the zoom mode of enlarging in the vertical direction, the screen can be scrolled in the vertical direction by changing the phases of the vertical synchronizing signal and the video signal.

References: Onishi: "Wide TV" Television Society of Japan, Vol. 47, No. 7 (July 1993), etc.

[0012]

By the way, conventionally, there is known a television receiver having a parent-child screen (PinP) function, so-called picture-in-picture, which is also described in the above-mentioned reference. Like
The wide-screen television described above is generally equipped with a PinP function.

This PinP function is as shown in FIG.
This is a function of displaying the child screen Ps over the currently-viewed parent screen Pp, and another image roughly sampled corresponding to the size ratio with the parent screen Pp is displayed on the child screen Ps. It is displayed in a reduced size via a dedicated memory.

Then, as shown in FIG. 7, the display position of the child screen Ps is not one specific position but is set in advance as a plurality of child screen display positions Psa to P as four corners of the parent screen Pp.
sd is set. The user can select one of the plurality of sub-screen display positions Psa to Psd by the sub-screen position switching operation.

By the way, in the case of displaying an image of the NTSC system on a horizontal television, the electron beam deflection width and scanning speed can be changed in a plurality of image display modes as described above without changing the time axis of the video signal. A television receiver has been proposed, which is implemented by modification.

In the case of this type of horizontal television receiver,
In the normal mode among the image display modes of the wide television as described above, as shown by a chain line in FIG.
Since the entire p is displayed on the picture tube surface Scw, no problem occurs in the PinP function as described above.

However, in the zoom mode, as shown in FIG. 9, the main screen Ppz is enlarged by expanding the deflection width in the vertical direction.
Is enlarged in the vertical direction, the image display position is the parent screen P.
In the case of the center of pz, as shown by the broken line in FIG. 9, a part of the child screen Ps at each child screen display position Psa to Psd is a tube surface S.
There is a problem that the image of the sub-screen Ps is partially lost because it overflows to the outside of cw.

Further, when the display position of the zoom image is scrolled upward, as indicated by the broken line in FIG.
The images of the child screens Ps at the upper child screen display positions Psa and Psb are not missing, but the lower child screen display positions Psc and Ps.
Part of the sub screen Ps of sd overflows outside the tube surface Scw,
The problem of partial omission occurs.

Similarly, when the display position of the zoom image is scrolled downward, the lower child screen display position Psc,
The child screen Ps of Psd does not have a missing image, but a part of the child screen Ps at the upper child screen display positions Psa and Psb overflows outside the tube surface Scw and is partially missing. Occurs.

In view of the above points, the present invention provides a wide-screen television receiver having a PinP function,
It is an object of the present invention to provide a television receiver capable of preventing the loss of an image on a sub-screen in a display mode involving an increase in vertical deflection width.

[0021]

In order to solve the above-mentioned problems, the television receiver according to the invention of claim 1 has a display screen of a picture tube 36 having a wide aspect ratio when the reference numerals of the embodiments described later are made to correspond. A television receiver capable of displaying an image with a normal aspect ratio in a plurality of display modes by controlling the electron beam deflecting means 34 of the picture tube, and displaying the image with a normal aspect ratio on the main screen. When a child screen display means 33 for displaying an image of the child screen is provided at a predetermined position on the parent screen as the image of, and the display mode is accompanied by the expansion of the deflection width in the vertical direction, and a part of the child screen is missing. In addition, the display position of the child screen on the parent screen is
It is characterized in that display position changing means 41 for changing the position so as to be within the screen of the picture tube is provided.

In the television receiver according to the second aspect of the present invention, when an image having a normal aspect ratio is displayed on the display screen of the image receiving tube 36 having a wide aspect ratio, the reference image of the embodiment described later corresponds to the image receiving tube. In the television receiver capable of displaying in a plurality of display modes by controlling the electron beam deflecting means 34, the image of the normal aspect ratio is set as the image of the parent screen and is determined in advance on the parent screen. Child screen display means 34 for selectively displaying the image of the child screen is provided at a plurality of predetermined positions, and when the display mode involves vertical deflection width expansion, a plurality of predetermined positions on the parent screen are displayed. The display position limiting means 41 is provided so as to limit the selection of the above-mentioned child screen position only between the child screen positions where the child screen is not missing.

[0023]

According to the above configuration of the present invention, in the zoom mode accompanied by the expansion of the deflection width in the vertical direction, in the invention of claim 1, the display position of the sub-screen on the main screen is changed, and According to the second aspect of the present invention, the selectable child screen display position is restricted from among the plurality of child screen display positions on the parent screen, and loss of the image of the child screen is prevented.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a television receiver according to the present invention will be described below with reference to FIGS.

In FIG. 2, 10 is a tuner system, 20 is an audio signal system, 30 is a video signal system, and 40 is a control system.

The tuner system 10 is a terrestrial broadcasting antenna A.
Two U / V tuners 1 for receiving broadcast signals from g.
1 and 12, a BS / CS tuner 13 for receiving a broadcast signal from a satellite broadcasting antenna As, and this tuner 13
And a converter 14 for converting a MUSE signal of high-definition television broadcast, so-called high-definition broadcast, received into the NTSC system signal.

The channel selection of the U / V tuners 11 and 12 is performed by the system control circuit (microprocessor) 41 of the control system 40.
Controlled by. Also, the selection of the BS / CS tuner 13 is controlled by a dedicated microprocessor 15.

Further, the demodulation output Smd of the carrier multiplexing control signal of the U / V tuners 11 and 12 is supplied to the microprocessor 41 as the discrimination information of the voice multiplexing mode.

From the U / V tuners 11 and 12 and the BS / CS tuner 13, composite video signals V11, V12,
V13 and left and right audio signals L11, L12, L13; R11, R1
2 and R13 are output, and the signal selector (switch) 16
Is supplied to each. The converter 14 outputs a luminance signal Y14, a carrier color signal C14, and audio signals L14 and R14.
Are output and supplied to the signal selector 16, respectively.

The selector 16 is a microprocessor 41.
The composite video signal Vp and audio signals Lp and Rp for the parent screen and the composite video signal Vs for the child screen are obtained from the above. The audio signal from the selector 16 is supplied to the audio signal system 20, and the video signal is supplied to the video signal system 30.

The audio signal system 20 includes an audio signal processor 2
1 and left and right speakers 22 and 23. Selector 16
In the processor 21, the sound signal for the parent screen is adjusted / adjusted in volume, sound quality, balance, etc. under the control of the microprocessor 41, and is not shown in FIG.
It is supplied to the speakers 22 and 23 via a pair of drive amplifiers.

The video signal system 30 comprises a video signal processor 3
1, a Y / C separation circuit 32 for a parent screen, a signal processing circuit (hereinafter referred to as PinP circuit) 33 for a child screen, and a microprocessor 34 for forming an image frame by a three-dimensional comb filter using frame correlation. With.

The video signal processor 31 to the image frame forming microprocessor 34 are all controlled by the system microprocessor 41.

The composite video signal Vp for the parent screen is separated into the luminance signal Y32 and the carrier color signal C32 in the Y / C separation circuit 32 and returned to the signal selector 16. And
The luminance signal Y32 and the carrier color signal C32, and the converter 1
The luminance signal Y14 and the carrier color signal C14 from 4 are selectively obtained from the signal selector 16 and supplied to the processor 31.

The composite video signal Vs for the child screen is PinP
In the circuit 33, the luminance signal Y and the color difference signals RY and B-
A blanking signal Y that controls the display position and size of the small screen after being separated and demodulated into Y and subjected to predetermined processing
It is supplied to the video signal processor 31 together with S.

Image frame forming circuit (microprocessor) 3
4 generates a blanking signal S34 for forming an image frame for cutting an unnecessary portion in the normal mode and the zoom mode as described above.

The microprocessor 41 uses a red R for displaying the receiving channel, voice mode, etc. on the screen in characters.
The three primary color signals S41 of green G and blue B are output. The output signal S41 is added to the blanking signal S34 by the adder 35 and supplied to the video signal processor 31.

Under the control of the microprocessor 41, the video signal processor 31 adjusts the sharpness and brightness of the image, corrects the image distortion, etc., and outputs the R, G, B signals from the video signal processor 31. The output signal S31 is supplied to the picture tube 36 through a set of drive amplifiers (not shown),
The image is displayed on a wide tube surface in any of the plurality of display modes as described above.

Under the control of the microprocessor 41, the deflection coil 37 is supplied with a required deflection current from the variable deflection circuit 38 in accordance with a plurality of display modes as described above. As shown in FIGS. 5B, 5C, and 6B, the image is displayed in a wide tube surface Scw in either or both of the horizontal and vertical directions. As described above, in the zoom mode of FIG. 6B, the deflection width is expanded in the vertical direction.

In the case of this example, various display modes are realized by changing the beam scanning speed and the deflection width according to the image display mode, and the time axis processing for the video signal is not performed.

A horizontal / vertical synchronizing signal H39, V39 is supplied from a synchronizing separation circuit 39 commonly to the deflection circuit 38 and the image frame forming circuit 34.

The control system 40 includes a system control circuit 41 and
It is provided with a memory 42 that stores information necessary for various controls, and is connected via a so-called I ² C bus 43.

Further, the remote control receiver 44 and the operation key 45
By this, various control information from the user, such as tuning, is input to the microprocessor 41, and the control data from the microprocessor 41 is supplied to each unit through the path shown by the dotted line in FIG. .

Next, the display position control operation of the child screen according to the embodiment of the present invention will be described with reference to FIGS. 1, 3 and 4.

First, in steps S1 and S2 of FIG. 1, as shown in FIG. 3, the zoom position is the center of the parent screen Ppz, or, as shown in FIG. 4, the zoom position is above the parent screen Ppz. Alternatively, it is determined whether the scroll is down.

If none of the above, the process proceeds to step S3 and the four sub-screen display positions Psa, Psb, P shown in FIG.
The child screen position can be selected between sc and Psd. That is,
The process of moving the child screen position is performed. In this case, since the display mode is the non-zoom mode and the deflection width in the vertical direction is not expanded, the above-described inconvenience does not occur at the display position of the small screen.

If the zoom position is the center of the main screen Ppz, the process proceeds from step S2 to step S4, and the display position of the sub screen overflows outside the tube surface Scw shown in FIG. , Psb, Psc, Psd, as shown in FIG. 3, appropriate positions Qsa, Qsb, Qs within the picture tube surface Scw.
It is changed to c and Qsd so that the child screen does not overflow from the tube surface Scw. In this case, the transition control of the child screen display positions is performed by the four child screen display positions Psa and P shown in FIG.
This is performed for sb, Psc, and Psd. After performing the shift control of the child screen display position, steps S4 to S3 are performed.
Proceed to the four sub-screen display positions Qsa, Qsb, Qsc, Qsd
The selection of the sub-screen position between the two is performed.

On the other hand, when the zoom position is scrolled to the upper side or the lower side of the parent screen Ppz, the process proceeds from step S1 to step S5, and in this step S5, the currently selected child screen position is the picture tube surface Scw. It is then determined whether or not the image of the small screen is in an appropriate position where the image is not lost.

If it is in the proper position, the process proceeds to step S6, and position selection is possible only among the child screen positions of the four child screen positions where the image is not lost.
For example, when the scroll position of the zoom image is at the upper side as shown in FIG. 4, four sub-screen positions Psa,
Only the positions Psa and Psb of Psb, Psc and Psd are proper positions. Therefore, if the currently selected sub-screen position is either of these two positions Psa and Psb, it is not necessary to change the sub-screen position, and between these two positions Psa and Psb You can make a choice.

If it is determined in step S5 that the currently selected child screen position is not in the proper position, step S7 is performed.
Proceed to step 4 and move to one of the four child screen positions where the child screen image is not missing. For example, in FIG. 4, the position Psc
If is selected, the child screen position is moved to the position Psa. Then, the process proceeds to step S6 so that the position can be selected only between the child screen positions where the child screen image is not missing.

When it is determined in step S5 that the sub-screen is missing and the process proceeds to step S7, if another sub-screen position is not found to be proper even if other sub-screen positions are checked, the same as when the zoom position is the center position. Then, move the inset screen to the proper position. After that, the restricted child screen position selection processing is enabled.

As a result, in this embodiment, even in the zoom mode, it is possible to prevent the sub-screen Ps from overflowing out of the picture tube surface Scw due to the change of the display position of the sub-screen and the position selection restriction. It

[0053]

As described above, according to the present invention, in a wide-screen television receiver having a PinP function, even if the zoom mode is accompanied by the expansion of the deflection width in the vertical direction, the child Since the display position of the screen is moved to the inner side, and the selection display of the child screen between the plurality of child screen positions is limited, it is possible to prevent the image of the child screen from being lost.

[Brief description of drawings]

FIG. 1 is a flow chart for explaining the operation of an embodiment of a television receiver according to the present invention.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 3 is a diagram for explaining the operation of the embodiment of the present invention.

FIG. 4 is a diagram for explaining the operation of the embodiment of the present invention.

FIG. 5 is a diagram for explaining the present invention.

FIG. 6 is a diagram for explaining the present invention.

FIG. 7 is a diagram for explaining the present invention.

FIG. 8 is a diagram for explaining the operation of the conventional example.

FIG. 9 is a diagram for explaining another operation of the conventional example.

FIG. 10 is a diagram for explaining another operation of the conventional example.

[Explanation of symbols]

10 Tuner system 20 Audio signal system 30 Video signal system 31 Video signal processor 32 Sub-screen signal processing circuit (PinP circuit) 38 Variable deflection circuit 40 Control system 41 System control circuit (microprocessor) 43 Bus Ppz Main screen Ps Sub screen Psa , Psb, Psc, Psd Selectable sub-screen display position Qsa, Qsb, Qsc, Qsd Position-selectable sub-screen display position

Claims (2)

[Claims] 1. A television receiver capable of displaying an image having a normal aspect ratio on a display screen of a picture tube having a wide aspect ratio in a plurality of display modes by controlling an electron beam deflecting means of the picture tube. While the normal aspect ratio image is used as an image of the parent screen, a child screen display means for displaying the image of the child screen is provided at a predetermined position on the parent screen, and the display mode is expanded in the vertical deflection width. Accordingly, when a part of the child screen is lacking, a display position changing means for changing the display position of the child screen on the parent screen to be within the screen of the picture tube is provided. Television receiver. 2. A television receiver capable of displaying an image having a normal aspect ratio on a display screen of a wide aspect ratio picture tube in a plurality of display modes by controlling the electron beam deflecting means of the picture tube. In the above-mentioned display mode, the image of the normal aspect ratio is used as an image of the parent screen, and a child screen display means for selectively displaying the images of the child screen is provided at a plurality of predetermined positions on the parent screen. Is accompanied by vertical deflection width expansion,
A television provided with display position limiting means for limiting the selection of the child screen position among a plurality of predetermined positions on the parent screen so as to be performed only between child screen positions where the child screen is not missing. Receiving machine.