JP2002374477A - Television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television receiver which is free of restrictions on the kind, etc., of a picture displayed as a slave picture. SOLUTION: The television receiver which has a memory for storing a video signal and displays a slave picture different from a master picture on the same screen through image composition processing using the memory displays at least one slave picture 702 as a picture with a different aspect ratio based upon a video signal of a different broadcasting system form a video signal source different from that of a master picture 701 (or another slave picture). The master picture and slave picture are displayed without overlapping with each other.

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 more particularly to a technique for displaying a reduced image called a small screen on a screen.

[0002]

2. Description of the Related Art Conventionally, on a screen of a television receiver,
Displaying a reduced image called a child screen or the like is performed. As a display mode of such a reduced image, for example, as shown in FIG. 13, three child screens S1, S2, and S3 are added to a part of the parent screen M using the entire screen.
Are superimposed on each other, or as shown in FIG. 14, only a plurality of child screens S11 to S19 are displayed side by side. By performing such display, images of a plurality of channels can be simultaneously checked.

In order to display an image displayed as any of the sub-screens as a main screen while such a display is being performed, the user operates a remote control device or the like attached to the television receiver. Then, the display is switched to the corresponding display by instructing the exchange of the parent screen and the child screen or the instruction of displaying only the designated child screen as the parent screen.

[0004]

Conventionally, when displaying a plurality of sub-screens, each sub-screen is displayed with the same aspect ratio by a video signal of the same broadcast system. There are a plurality of broadcasting systems having different ratios and the like. For this reason, if only the same type of video can be displayed as a sub-screen, the types of video that can be displayed on the sub-screen will be limited, and restrictions will be placed on channel selection using the display function of the sub-screen. Become.

[0005] It is an object of the present invention to provide a television receiver which has no restriction on the type of video displayed on the small screen.

[0006]

SUMMARY OF THE INVENTION The present invention has a memory for storing a video signal, and a television receiver for displaying, on the same screen, a child image different from the main image in an image synthesizing process using the memory. In the machine, for example, as shown in FIG.
At least one child image 702 is an image having a different aspect ratio due to a video signal of a different broadcast system from a video signal source different from the parent image 701 (or another child image).

Further, in this case, the main image and the child image are displayed without overlapping.

[0008]

According to the present invention, at least one child image is
By using images of different aspect ratios by video signals of different broadcasting systems from different video signal sources from the parent image or other child images, images of different aspect ratios of different broadcasting systems can be displayed side by side. become.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a diagram showing the configuration of a television receiver according to the present embodiment. In FIG. 1, reference numeral 1 denotes an entire television receiver, and a plurality of antennas 2 and 3 are connected to the television receiver 1. The signals received by the antennas 2 and 3 are supplied to tuners 4 and 5, and the tuners 4 and 5 demodulate broadcast waves in a frequency band of a predetermined channel to obtain predetermined video signals. The tuners 4 and 5 are provided with a central controller (CP) for controlling various operations of the television receiver.
The receiving channel is controlled by U) 6. The central control device 6 is constituted by a microcomputer, and a receiving channel, various operation modes, and the like are controlled based on an operation of operation keys 7 attached to the television receiver. Alternatively, it may be controlled by transmitting a remote control signal from a remote control device (not shown).

The video signals output from the tuners 4 and 5 are supplied to a switch circuit 8. The television receiver 1 has a plurality of external video signal input terminals 9a,
9b and 9c are attached, and respective input terminals 9a and 9c are attached.
Video signal sources such as a VTR and a video disc playback device are connected to b and 9c. Then, the video signals supplied from these video signal sources to the input terminals 9a, 9b, 9c are
It is supplied to the switch circuit 8. Then, the switch circuit 8 selects one of the video signals under the control of the central control device 6 and supplies the selected video signal to the image reception processing circuit 10. Then, the video signal (RGB) subjected to the image receiving process based on the control of the central controller 6 by the image receiving processing circuit 10.
Signal) is supplied to the cathode ray tube 11 to cause the cathode ray tube 11 to display an image.

Further, in the present embodiment, the same image signal as the image signal supplied to the cathode ray tube 11 after the image receiving processing is performed by the image receiving processing circuit 10 is output from the output terminal 10a. However, while the video signal supplied to the cathode ray tube 11 is an RGB signal, the video signal output from the output terminal 10a is a composite video signal or a luminance / chroma separation video signal. Therefore, the image receiving processing circuit 1
In the case of 0, the video signal such as an RGB signal is output from the output terminal 10a.
Requires a processing circuit for creating a composite video signal (or a luminance / chroma separated video signal) to be supplied to the video camera.

The image receiving circuit 10 extracts a horizontal synchronizing signal and a vertical synchronizing signal from the video signal, and supplies the horizontal synchronizing signal and the vertical synchronizing signal to the horizontal deflection circuit 12 and the vertical deflection circuit 13. The horizontal deflection circuit 12 drives the horizontal deflection coil 14H attached to the cathode ray tube 11, and the vertical deflection circuit 13 drives the vertical deflection coil 14V attached to the cathode ray tube 11.

In this embodiment, a plurality of images are reduced and displayed simultaneously on the cathode ray tube 11.
The configuration for this will be described. The video signal supplied to the switch circuit 8 (the output of the tuners 4 and 5 and the terminal 9
a, 9b, 9c), two video signals are selected based on the control of the central controller 6, and the selected video signals are supplied to the decoders 21a, 21b. . Each of the decoders 21a and 21b demodulates the supplied video signal into a luminance signal and a chroma signal.
The demodulated luminance signal and chroma signal are supplied to respective analog / digital converters 22a and 22b to be converted into digital data, and the converted digital data is supplied to a memory controller 23. Also, each decoder 21
The synchronization signal extracted from the video signal supplied to the a and 21b is supplied to the memory controller 23.

The memory controller 23 has a frame memory 2 for storing video signals converted into digital data.
4 is connected, and the two systems of video data supplied from the analog / digital converters 22a and 22b are stored under the control of the memory controller 23 based on a command from the central control device 6. In this case, when writing to the memory 24,
It is assumed that the video data of each system is thinned out according to the reduction ratio of the display image and the data amount is compressed. The writing of the video data to the memory 24 is performed continuously in one field cycle.

In this embodiment, when writing the data of the reduced image from the memory controller 23 to the memory 24,
If necessary, data for adding a frame in any color to each reduced image can be simultaneously written. Further, in the case of a display mode in which a parent screen and a child screen described later are displayed in a state where they do not overlap, if a part of the display screen that is neither the parent screen nor the child screen occurs, a color of some background color is also applied to this part. Data to be written to the memory. The data of these frames and the data of the background are generated and written in the memory controller 23 based on a command from the central control device 6.

Then, the video data stored in the memory 24 is read out continuously in one field cycle,
The signals are supplied to an analog converter 25 to be converted into analog luminance signals and chroma signals. Then, the read luminance signal and chroma signal are supplied to an image reception processing circuit 10, which performs an image receiving process to generate RGB signals. The RGB signals are supplied to a cathode ray tube 11, and an image is displayed on the cathode ray tube 11. Let it.

With this configuration, by transmitting a command from the central control unit 6 to the memory controller 23, the reduced image of the reduced image based on the processing state when the memory controller 23 writes the video data to the memory 24 is obtained. Various display modes become possible. Hereinafter, the display modes prepared by the television receiver of this example will be described in order. First, the display shown in FIG. 2 can be performed.

In FIG. 2, reference numeral 100 denotes a cathode ray tube 11.
, The main screen 101 is largely displayed on the right side of the screen 100, and three child screens 102, 103, 104 are displayed on the left side in a vertical line.
Then, frames 112, 113, and 114 are individually added to the three child screens 102, 103, and 104, respectively.
Then, the colors of the respective frames 112, 113, 114 are changed based on the control of the central control device 6 according to the selection state of the respective sub-screens 102, 103, 104 and the like. For example, when replacing a child screen with a parent screen using a remote control device or the like, when instructing which child screen is to be replaced, the color of the frame of the specified child screen is changed to another child screen.

The relationship between the input video data and each screen is as follows. As an image to be displayed on the main screen 101, the video signal of the channel received by the tuner 4
1a, an image is formed by a signal supplied to the memory controller 23 in the processing by the analog / digital converter 22a. At this time, the receiving channel in the tuner 4 is fixed, written in each field, and the main screen 101 is displayed as a complete moving image. And each child screen 10
The video signal of the channel received by the tuner 5 as an image to be displayed by the
b, An image based on the signal supplied to the memory controller 23 in the processing by the analog / digital converter 22b. In this case, the reception channel in the tuner 5 is changed at a predetermined cycle (for example, every several seconds) to change each of the child screens 102, 1
At 03 and 104, images of individual channels are displayed.
Therefore, the image displayed on each of the child screens 102, 103, and 104 is a pseudo moving image whose content changes every few seconds.

Next, the display mode shown in FIG. 3 will be described. In FIG. 3, reference numeral 200 denotes the entire screen displayed by the cathode ray tube 11, and this screen 200 is divided into four equal parts, each having the same size as the parent screen. Screen 201 and child screens 202 and 20
3 and 204 are displayed. Also at this time, a frame is added to each screen (including the parent screen here), and the display color of the frame is changed according to the selection state and the like. The color of the frame is changed between the parent screen and each child screen. And parent screen 2
01, the video signal of the channel received by the tuner 4 is processed by the decoder 21a and the analog / digital converter 22a to the memory controller 2
It is assumed that the image is a complete moving image based on the signal supplied to 3. In addition, as an image to be displayed on each of the sub-screens 202, 203, and 204, the video signal of the channel received by the tuner 5 is converted by the decoder 21 b and the analog / digital converter 2.
The image displayed by each of the sub-screens 202, 203, and 204 is changed every few seconds by periodically changing the receiving channel of the tuner 5 as an image based on the signal supplied to the memory controller 23 in the process of 2b. This is a pseudo moving image.

Next, the display mode shown in FIG. 4 will be described. In FIG. 4, reference numeral 300 denotes the entire screen displayed by the cathode ray tube 11, and this screen 300 is divided into nine equal parts, each having the same size as the parent screen. Screen 301 and child screens 302 and 30
3 @ 309 is displayed. In this case, the center is the parent screen 301. Also at this time, a frame is added to each screen (including the parent screen here), and the display color of the frame is changed according to the selection state and the like. The color of the frame is changed between the parent screen and each child screen. Then, as an image to be displayed on the main screen 301, a video signal of the channel received by the tuner 4 is converted into a complete moving image by a signal supplied to the memory controller 23 by processing by the decoder 21a and the analog / digital converter 22a. I do. Also,
As an image to be displayed on each of the sub-screens 302 to 309, a video signal of the channel received by the tuner 5
1b, an image based on the signal supplied to the memory controller 23 in the processing by the analog / digital converter 22b, and by changing the receiving channel of the tuner 5 periodically, the image displayed on each of the sub-screens 302 to 309 every several seconds. Is a pseudo moving image whose contents change.

Next, the display mode shown in FIG. 5 will be described. In FIG. 5, reference numeral 400 denotes the entire screen displayed by the cathode ray tube 11, and a relatively large parent screen 401 is displayed at the lower left of the screen 400. At the same time, nine child screens 402, 403, and 410 are displayed on the upper right. Also at this time, a frame is added to each child screen, and the display color of the frame is changed depending on the selection state or the like. And parent screen 4
01, the video signal of the channel received by the tuner 4 is processed by the decoder 21a and the analog / digital converter 22a to the memory controller 2
It is assumed that the image is a complete moving image based on the signal supplied to 3. In addition, as an image to be displayed on each of the sub-screens 402 to 410, a video signal of a channel received by the tuner 5 is
An image based on the signal supplied to the memory controller 23 in the processing by the decoder 21b and the analog / digital converter 22b is used. A pseudo moving image whose contents change every time.

Next, the display mode shown in FIG. 6 will be described. In FIG. 6, reference numeral 500 denotes the entire screen displayed by the cathode ray tube 11, and a main screen 501 is displayed on the entire surface of the screen 500; The four child screens 502, 503, 504, and 505 are overlapped with the parent screen 501.
Is displayed. Also at this time, a frame is added to each child screen, and the display color of the frame is changed depending on the selection state or the like. Then, as an image to be displayed on the main screen 501, a video signal of a channel received by the tuner 4 is converted into a complete moving image by a signal supplied to the memory controller 23 by processing by the decoder 21a and the analog / digital converter 22a. I do. In addition, each child screen 502 to 50
The video signal of the channel received by the tuner 5 as an image to be displayed by the tuner 5 is processed by the decoder 21b and the analog / digital converter 22b to the memory controller 23.
, The receiving channel of the tuner 5 is periodically changed, and each of the small screens 502 to 50
The image displayed at 5 is a pseudo moving image whose content changes every few seconds.

Next, the display mode shown in FIG. 7 will be described. In FIG. 7, reference numeral 600 denotes the entire screen displayed by the cathode ray tube 11, and a main screen 601 is displayed on the entire surface of the screen 600. Nine child screens 602, 603 # 610 are displayed in a state of overlapping with the main screen 601. Also at this time, a frame is added to each child screen, and the display color of the frame is changed depending on the selection state or the like. Then, as an image to be displayed on the parent screen 601, the tuner 4
The video signal of the channel received by the decoder 21a,
An image as a complete moving image based on the signal supplied to the memory controller 23 in the processing by the analog / digital converter 22a. As an image to be displayed on each of the child screens 602 to 610, a video signal of a channel received by the tuner 5 is an image based on a signal supplied to the memory controller 23 through processing by the decoder 21b and the analog / digital converter 22b. The image displayed on each of the child screens 602 to 610 by periodically changing the reception channel No. 5 is a pseudo moving image whose content changes every few seconds.

In the above examples, the images having an aspect ratio of 4: 3 are displayed on both the parent screen and the child screen.
As shown below, an image of a normal broadcast system having an aspect ratio of 4: 3 and an image having an aspect ratio of 16:
Nine broadcast system images can be mixedly displayed.

First, the display mode shown in FIG. 8 will be described as an example in which images having different aspect ratios are mixed. In FIG. 8, reference numeral 700 denotes the entire screen displayed by the cathode ray tube 11. Parent screen 7 on the left
01 is displayed, and a child screen 702 is displayed on the right side. Then, as an image to be displayed on the parent screen 701,
The video signal of the channel received by the tuner 4 is converted into a complete moving image by the signal supplied to the memory controller 23 in the processing by the decoder 21a and the analog / digital converter 22a. Further, as an image to be displayed on the child screen 702, a video signal of a channel received by the tuner 5 is converted into a complete moving image by a signal supplied to the memory controller 23 through processing by the decoder 21b and the analog / digital converter 22b. I do. In this case, the channel to be received by the tuner 5 is a channel of a broadcasting system (such as high-definition broadcasting) capable of obtaining an image having an image aspect ratio of 16: 9 (accordingly, here, a channel compatible with the tuner 5 is used). A), an image having an aspect ratio of 16: 9 is displayed as the child screen 702. Also, an image having a normal aspect ratio (that is, an aspect ratio of 4: 3) is displayed as the main screen 701.

Next, the display mode shown in FIG. 9 will be described. In FIG. 9, reference numeral 800 denotes the entire screen displayed by the cathode ray tube 11 (here, the aspect ratio of the screen 800 is 16: 9). A main screen 801 having an aspect ratio of 16: 9 is displayed on the left side of the screen 800,
A plurality of child screens 802 and 80 having an aspect ratio of 4: 3 on the right side
Display 3 @ 810. Then, on the parent screen 801,
Display an image as a complete moving image with the tuner receiving channel fixed. In addition, each child screen 802 to 810
As an image to be displayed, an image as a pseudo moving image in which the receiving channel of the tuner is sequentially changed is displayed. Then, a frame in which a color is individually set is added to each of the child screens 802 to 810.

In the above description, a case has been described in which two systems for supplying video data to the memory controller 23 (ie, two decoders 21a and 21b and two analog / digital converters 22a and 22b). But,
When there are three or more systems, three sets of moving images can be displayed at the same time, or two sets of moving images and a plurality of pseudo moving images can be displayed simultaneously. Next, an example of this case will be described with reference to FIG. 10. In FIG. 10, reference numeral 900 denotes the entire screen displayed by the cathode ray tube 11;
0, a parent screen 901 having an aspect ratio of 4: 3 is displayed on the upper left, and a child screen 902 having an aspect ratio of 4: 3 is displayed on the upper right.
Is displayed, and four child screens 903, 904, 905, and 906 having an aspect ratio of 16: 9 are displayed further below. Then, an image as a complete moving image in which the receiving channel of the tuner 4 is fixed is displayed on the main screen 901. Further, any of the external input terminals 9 a to 9
An image based on the video signal obtained in 9c is displayed as a complete moving image. Furthermore, four child screens 903, 90
At 4,905,906, an image as a pseudo moving image in which the receiving channel of the tuner 5 is sequentially changed is displayed. Then, a frame in which a color is individually set is added to each of the child screens 902 to 906.

Although the parent screen and the child screen in the display modes shown in the respective examples described above display the image received by the tuner (except for the example of FIG. 10), any one of the external input Images based on the video signals obtained at the terminals 9a to 9c may be displayed as a parent screen or a child screen.

Although the audio reproduction system in this television receiver has not been described, it is conceivable to normally reproduce the audio corresponding to the image displayed as the main screen. May be reproduced.

In the above-described embodiment, when a frame is displayed on a child screen or the like, the frame is distinguished by the color of the frame. However, the frame may be distinguished by other factors such as a change in luminance. When a plurality of small screens are displayed side by side, the resolution of the small screen can be improved.
Hereinafter, a configuration for improving the resolution of the child screen will be described.

Here, a case will be described in which two sets of images are reduced and displayed simultaneously in parallel on the cathode ray tube 11. First, in the television receiver of FIG. 1, based on the control of the central control unit 6, the video signals (the outputs of the tuners 4 and 5 and the outputs of the terminals 9 a, 9 b and 9 c) supplied to the switch circuit 8 are output. Two video signals are selected, and the selected video signals are supplied to the decoders 21a and 21b. In each of the decoders 21a and 21b,
The supplied video signal is demodulated into a luminance signal and a chroma signal, and the demodulated luminance signal and the chroma signal are supplied to respective analog / digital converters 22a and 22b to be converted into digital data. The data is supplied to the memory controller 23. Also, each decoder 2
The synchronization signal extracted from the video signals supplied to 1a and 21b is supplied to the memory controller 23.

The memory controller 23 has a frame memory 2 for storing video signals converted into digital data.
4 is connected, and the two systems of video data supplied from the analog / digital converters 22a and 22b are stored under the control of the memory controller 23 based on a command from the central control device 6. In this case, as video data of each system written to the memory 24, data forming each horizontal line is thinned out one dot at a time to reduce the number of dots to half, but the number of horizontal lines itself is not thinned out. (That is, data of all horizontal lines is stored). In addition, as a storage state of the two systems of video data, the video data supplied from one analog / digital converter 22a is stored in the memory 2
4 is stored in an area where the left half image can be stored in the area where one image is stored, and the video data supplied from the other analog / digital converter 22b is stored in the right half image. Is stored in the area where is stored.
The writing of the video data to the memory 24 is performed continuously in one field cycle.

Then, the two sets of video data stored in the memory 24 are continuously read out in one field cycle and supplied to the digital / analog converter 25, where they are converted into analog luminance signals and chroma signals. Then, the read luminance signal and chroma signal are supplied to an image reception processing circuit 10, which performs an image receiving process to generate RGB signals. The RGB signals are supplied to a cathode ray tube 11, and an image is displayed on the cathode ray tube 11. Let it.

At this time, a control signal is supplied from the central control unit 6 to the vertical deflection circuit 13 so that the vertical deflection angle of the image received by the vertical deflection coil 14V is reduced to 1 / the normal time.
2 deflection angle. Further, the horizontal deflection angle is set to the normal angle.

With this configuration, a display as shown in FIG. 11 is performed as a reduced image display using a circuit facing the memory 24. That is, the screen 11 of the cathode ray tube 11
In the center left half 11L of a, an image based on one of the video signals selected by the switch circuit 8 is displayed in a normal half size (1/4 in area) and the right half 11R.
Then, an image based on the other video signal selected by the switch circuit 8 is displayed in a half size of a normal size.

Here, in the present embodiment, the resolution in the vertical direction of the image to be reduced and displayed is almost as good as that when the image is displayed on the entire screen. This point will be described with reference to FIG. 12. First, as a storage state of the video data in the memory 24, as shown in FIG. 12A, for example, one field by the video data output from the analog / digital converters 22a and 22b. Image is 8 dots in the horizontal direction x
It is assumed that it is composed of 48 dots of 6 dots in the vertical direction (here, the number of dots is set to a minimum number for the sake of simplicity). At this time, the data stored in the memory 24 is data of a total of 24 dots (dot data indicated by A in FIG. 12) in which one dot of each horizontal line is thinned out.

A reduced image is displayed with the data of 24 dots. At the time of displaying the reduced image, the vertical deflection angle of the vertical deflection coil 14V is の of that in the normal state. As shown in FIG. 12B, the vertical interval between each horizontal line is reduced to 、, and all 6 horizontal lines are displayed with a width of の that of the normal display. Therefore, the resolution in the vertical direction is no different from the case where the image is displayed using the entire screen. FIG. 12C shows a case where a conventional television receiver performs reduced display at a size of 1/2. For reference, FIG. 12C shows that the number of horizontal lines is reduced to 1/2 since the deflection angle is not changed conventionally. In other words, the display is performed by thinning out one horizontal line at a time, and the resolution in the vertical direction is １ ／.
Become.

In this example, two tuners 4,
5, two different sets of tuners 4 and 5 are used to select different channels, respectively.
If the video signal output from the switch 5 is selected by the switch circuit 8 and supplied to the memory 24, images of two different channels can be displayed side by side as shown in FIG. It is needless to say that an image displayed on one or both of them can be an image based on a video signal obtained at the external input terminals 9a to 9c.

Further, here, two sets of images are displayed in parallel by reducing the size to 1/2, but three or more sets of images may be displayed simultaneously. In this case, when the reduction ratio is changed to a value other than 1/2, the vertical deflection angle needs to be changed correspondingly.

[0042]

According to the present invention, at least one child image is formed as an image having a different aspect ratio by a video signal of a different broadcast system from a video signal source different from the parent image or another child image, Images with different aspect ratios of different broadcasting systems can be displayed side by side, and there are no restrictions on the images that can be displayed as child images, so that usability as a television receiver is improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a display example according to one embodiment.

FIG. 3 is an explanatory diagram showing a display example according to one embodiment.

FIG. 4 is an explanatory diagram showing a display example according to one embodiment.

FIG. 5 is an explanatory diagram showing a display example according to one embodiment.

FIG. 6 is an explanatory diagram showing a display example according to one embodiment.

FIG. 7 is an explanatory diagram showing a display example according to one embodiment.

FIG. 8 is an explanatory diagram showing a display example according to one embodiment.

FIG. 9 is an explanatory diagram showing a display example according to one embodiment.

FIG. 10 is an explanatory diagram showing a display example according to one embodiment.

FIG. 11 is an explanatory diagram showing a display example according to one embodiment.

FIG. 12 is an explanatory diagram showing a data configuration of a reduced image according to one embodiment.

FIG. 13 is an explanatory diagram showing a conventional display example.

FIG. 14 is an explanatory diagram showing a conventional display example.

[Explanation of symbols]

Reference Signs List 1 television receiver 6 central control unit (CPU) 9 switch circuit 11 cathode ray tube 12 horizontal deflection circuit 13 vertical deflection circuit 14H horizontal deflection coil 14V vertical deflection coil 23 memory controller 24 memory 100, 200, 300 メ モ リ 900 screen 101, 201,301 ‥‥ 901 Main screen 102-104,202-204,302-309,4
02 to 409, 502 to 505, 602 to 610, 70
2,802-810,902-906 Sub-screen 112,113,114 Frame

Claims (2)

[Claims] 1. A television receiver having a memory for storing a video signal and displaying a child image different from a main image on the same screen by image synthesis processing using the memory, wherein at least one child image is provided. A television receiver in which an image having a different aspect ratio is generated by a video signal of a different broadcast system from a video signal source different from a parent image or another child image. 2. The television receiver according to claim 1, wherein the main image and the child image are displayed without overlapping.