JPH06169438A - Television receiver - Google Patents

Abstract

PURPOSE:To attain the fine control of slave screen to an optimal position according to a master screen by shifting an output timing and a switching timing based on slave screen movement data. CONSTITUTION:A control microcomputer 7 outputs a control signal based on the data of a cursor position data part 9 to a cursor generating part 10 according to the master screen. The generating part 10 outputs the video signal of a cursor B to the (b) fixed terminal of a second changeover switch SW2 based on the control signal. The switch SW2 is connected with the (b) side only in the output section of the video signal of the cursor B, connected with an (a) fixed terminal side otherwise, and the video signal of the cursor B is outputted to a CRT 11. At that time, the microcomputer 7 calculates the value of a slave screen position register according to code data, and the switching timing of the switch SW2, and the reading timing of a memory 16 are shifted based on a shift value updated by the new value. Then, the display position of a slave screen A is finely displaced, and the screen A can be discharged to the optimal position corresponding to the master screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a picture-in-picture function.

[0002]

2. Description of the Related Art This type of television receiver has a sub-screen creating circuit for creating a sub-screen video signal in addition to a circuit system for processing a normal video signal. The video signal including the sub-screen is created by selectively outputting the video signal and the video signal for the parent screen of the normal circuit system by the switching means. Further, the output timing of the sub-screen image signal of the sub-screen creation circuit and the switching timing of the switching means are configured to be variable by the sub-screen position switching signal. When the child screen position switching signal is output by a user operation, the output timing and the switching timing are changed. As a result, the small screen A is selectively projected at the four corners of the screen as shown in FIG. 6, for example.

[0003]

According to the above-mentioned conventional configuration, the child screen can be selectively arranged at a position where the viewing of the parent screen is not hindered. However, the parent screen still has a slight positional relationship. It was sometimes unsightly.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a television receiver capable of adjusting the child screen at an optimum position according to the parent screen.

[0005]

To achieve the above object, a television receiver according to the present invention is provided with a sub-screen creating circuit for creating a sub-screen video signal, and the sub-screen video signal and the main screen video are provided. A switching means for selectively outputting the signal and is provided,
A television receiver capable of selectively displacing the position of the small screen to a plurality of reference positions by synchronizing the output timing of the small screen image signal of the small screen creating circuit and the switching timing of the switching means. In the above, the output timing and the switching timing can be shifted based on the child screen movement data.

[0006]

In the sub-screen, a plurality of reference positions can be selected, and the position of the sub-screen can be adjusted by shifting the output timing and the switching timing.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show an embodiment of the present invention. FIG. 1 shows a circuit block diagram of a television receiver.
In FIG. 1, the received signal of the antenna 1 is the first tuner 2
To the second tuner 3, and the tuners 2 and 3 output video signals selected based on the tuning control signal of the control microcomputer 7. The output of the first tuner 2 is a parent screen video signal, and this parent screen video signal is guided to the a fixed terminal of the first changeover switch SW ₁ . The output of the second tuner 3 is supplied to the small screen creating circuit 4, where it is processed into a small screen image signal. Child screen creation circuit 4
The detailed configuration of the above is described later, and the sub-picture video signal processed here is led to the b fixed terminal of the first changeover switch SW ₁ .

The first changeover switch SW _1, which is a changeover means, selectively outputs the main-screen video signal and the sub-screen video signal based on the switching control signal of the sub-screen creating circuit 4. That is,
A video signal of the parent-child screen is output from the first changeover switch SW ₁ , and this video signal is output by the color signal reproduction circuit 5 to R, G, B.
After being converted into a signal, it is guided to the a fixed terminal of the second changeover switch SW ₂ . The second changeover switch S is shown in FIG.
Although only one W ₂ is shown, there are two other W 2
This switch is omitted.

The light receiving section 6 is a joystick remote controller 12
The received optical signal is received, and the received code signal is output to the control microcomputer 7. The control microcomputer 7 decodes the code signal and controls each circuit based on this code signal. For example, when the cursor movement code and the click code are input, the flow shown in FIG. 5 is executed, and the details will be described in the section of action. The control microcomputer 7 also performs bidirectional data transfer between the small screen position data section 8 and the cursor position data section 9.

As shown in detail in FIG. 2, the child screen position data section 8 has a child screen position register 8a, a horizontal position register 8b, a vertical position register 8c, and a horizontal shift register 8.
d, a vertical shift register 8e, and the child screen position register 8a stores the coordinate data of the child screen A. The horizontal position register 8b and the vertical position register 8c selectively store one of four types of data values determined based on the value of the child screen position register 8a. These four types of data values indicate the positions (reference positions) of the four corners of the screen as shown in FIG. 6, and when the value of the child screen position register 8a exceeds a certain boundary value, the upper right, lower right, lower left, upper left are displayed in this order. The data value is updated. The value of the horizontal position register 8b is the count number of the reference clock pulse that counts with the horizontal synchronizing pulse as a reference, and the horizontal position of the child screen is determined by this. The value of the vertical position register 8c is the number of horizontal sync pulses counted with the vertical sync pulse as a reference, and the vertical position of the child screen A is determined by this. Horizontal shift register 8d and vertical shift register 8
In e, horizontal and vertical shift values are stored based on the value of the child screen position register 8a.

As shown in FIG. 3, the cursor position data section 9 includes a cursor position register 9a and a horizontal position register 9.
b, the vertical position register 9c, and the cursor position register 9a stores the coordinate data of the cursor B. The value of the horizontal position register 9b is the count number of the reference clock pulse counted with the horizontal synchronizing pulse as a reference, and the horizontal position of the cursor B is determined by this.
The value of the vertical position register 9c is the count number of horizontal sync pulses counted with the vertical sync pulse as a reference, and the vertical position of the cursor B is determined by this.

Returning to FIG. 1 again, the control microcomputer 7
Outputs a control signal based on the data of the cursor position data section 9 to the cursor generation section 10. The cursor generator 10 outputs a switching control signal to the second changeover switch SW ₂ outputs a video signal of a cursor B on the basis of a control signal to the second b fixed terminal of the changeover switch SW _2. The second selector switch SW ₂ is connected to the b fixed terminal side only in the video signal output section of the cursor B, and is connected to the a fixed terminal side other than the cursor B, whereby the video signal of the cursor B is output to the CRT 11. The cursor generator 10 can output two types of cursor-shaped video signals as shown in FIG.

On the other hand, the joystick remote controller 12 has a joystick portion 12a whose standard position is the erected state with respect to the main body, and the joystick portion 12a is 360
It is structured so that it can be tilted within a range of degrees. The inclination angles of the joystick portion 12a in the two orthogonal directions are extracted as voltage values, and the inclination direction and inclination angle of the joystick portion 12a are detected from the voltage values. Then, the cursor movement code corresponding to this tilt direction and tilt angle is output as an optical signal. Also, the joystick portion 12a
Is configured to be pressed against the biasing force, and when the joystick portion 12a is pressed, a click code is output as an optical signal.

FIG. 4 shows a circuit block diagram of the child screen creating circuit 4. In FIG. 4, the video signal of the second tuner 3 is guided to the compression circuit 15, and the video signal is compressed by the compression circuit 1.
The data is compressed at 5. This data-compressed video signal is taken into the memory 16 by the control signal of the control circuit 17. Horizontal position register 18a, vertical position register 18
b, the horizontal shift register 18c and the vertical shift register 18d have respective corresponding registers 8 of the child screen position data section 8.
The data b, 8c, 8d and 8e are transferred by the control microcomputer 7 and the respective values are stored.

The control circuit 17 uses each value of the horizontal position register 18a and the vertical position register 18b as a reference, and based on each value obtained by adding and subtracting each shift value of the horizontal shift register 18c and the vertical shift register 18d. The reading of the memory 16 is controlled. Further, the control circuit 17 outputs a switching control signal to the first changeover switch SW _1, a first changeover switch SW ₁ is connected to only the child screen video signal output section of the memory 16 to the b fixed terminal side, otherwise a Switchable to connect to the fixed terminal side.

The operation of the above configuration will be described below with reference to the flow chart of FIG. As shown in FIG. 7A, when the joystick part 12a of the joystick remote controller 12 is tilted in a desired tilt direction in the sub-screen display mode and the cursor is in the normal mode, the cursor corresponding to this tilt direction and tilt angle is displayed. The movement code is output. Control microcomputer 7 calculates the value of the cursor position register 9a in accordance with the cursor position change code (step S _1), to calculate the values of above this value the horizontal position register 9b and the vertical position register 9c (Step S _2), a new value Each register 9
Update the values of a, 9b and 9c. The display position of the cursor B is moved by controlling the cursor generation unit 10 based on this new value.

Next, when the joystick portion 12a is pressed after moving the cursor B into the sub-screen A, a click code is output. Control microcomputer 7 changes the mode on the child screen movement mode (step S _3), and outputs a control signal to the cursor generator 10 to vary the cursor shape (step S _4). Then, the cursor generation unit 1
0 outputs the video signal of the cursor B of another type, as shown in FIG.
The display shape of the cursor B changes as shown in FIG. The operator recognizes that the mode has been changed to the small screen moving mode.

Next, when the joystick portion 12a of the joystick remote controller 12 is tilted in a desired tilt direction,
Similar to the above, the cursor movement mode corresponding to this tilt direction and tilt angle is output. The control microcomputer 7 treats the cursor movement code as a child screen movement code,
To calculate the value of the child screen position register 8a in accordance with the code data (step S _5). Than this value to calculate the value of the horizontal shift register 8d and the vertical shift register 8e (Step S _6), each register 8d, 8 to the new value
Update the value of e. The data in the horizontal shift register 8d and the vertical shift register 8e are transferred to the corresponding registers 18c and 18d in the child screen creating circuit 4 (step S).
₇ ). Then, based on this new shift value, the memory 16
The display position of the child screen A is slightly displaced by also shifting the read timing of. Further, when the value of the small screen position register 8a exceeds a certain boundary value by operating the joystick unit 12a, the control microcomputer 7 sets the small screen position register 8a to set the small screen A to the lower left reference position.
Of the horizontal position register 8b based on this value.
And the values of the vertical position register 8c are calculated, and the values of the horizontal shift register 8d and the vertical shift register 8e are reset. Then, each of the registers 8b, 8c, 8
The data d and 8e are transferred to the registers 18 of the child screen creation circuit 4.
a, transferred 18b, 18c, to 18 d (Step S _8), the child screen A is transferred to the lower left of the screen.

When the joystick portion 12a is pressed in the small screen moving mode, a click code is output. The control microcomputer 7 changes the mode to the normal mode regardless of whether or not the cursor B is within the sub-screen A (step S ₉ ), and outputs a control signal to the cursor generator 10 to change the cursor shape (step S ₉ ). ₁₀ ). Then, the display shape of the cursor B changes as shown in FIG. The operator recognizes that the mode has been changed to the normal mode.

In this embodiment, the child screen position register 8
Although the reference position is shifted when the value of a exceeds the boundary value, a sub-screen position changeover switch may be provided and the reference position may be changed based on the sub-screen position changeover signal of this switch. Further, although the four corners of the screen are set as the reference positions in this embodiment, the number and positions of the reference positions are not limited to this, and various modes can be considered.

In this embodiment, the cursor movement code is used not only to move the cursor B but also to move the child screen A. However, the movement of the cursor B and the movement of the child screen A are performed by using separate and independent codes. It may be configured to perform.

[0022]

As described above, according to the present invention, the position of the sub-screen can be changed by changing the output timing of the sub-screen video signal and the switching timing of the sub-screen video signal and the main screen video signal. In the television receiver that is selectively displaced to one of the plurality of reference positions, the output timing and the switching timing can be shifted based on the child screen movement data. Since the adjustment can be made, the sub-screen can be displayed at an optimal position according to the main screen. Further, according to the invention of claim 2, since the cursor movement data is used as the child screen movement data, there is an effect that the number of types of data to be handled can be small.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of a television receiver (embodiment).

FIG. 2 is a configuration diagram of a child screen position data portion (embodiment).

FIG. 3 is a configuration diagram of a cursor position data section (embodiment).

FIG. 4 is a circuit block diagram of a child screen creation circuit (embodiment).

FIG. 5 is a flowchart (example).

FIG. 6 is a diagram showing four reference positions of a child screen (example).

FIG. 7A is a diagram showing a screen display state in a normal mode, and FIG. 7B is a diagram showing a screen display state in a child screen movement mode (Example).

[Explanation of symbols]

4 ... child screen creation circuit 12a ... mode selecting means SW ₁ ... first changeover switch (switching means) A ... child screen

Claims (2)

[Claims] 1. A sub-screen creating circuit for creating a sub-screen video signal is provided, and switching means for selectively outputting the sub-screen video signal and the main screen video signal is provided, and the sub-screen of the sub-screen creating circuit is provided. In a television receiver capable of selectively displacing the position of the sub-screen to a plurality of reference positions by changing the output timing of the video signal for use and the switching timing of the switching means in synchronization, based on the sub-screen movement data. A television receiver characterized in that the output timing and the switching timing can be shifted. 2. A mode selecting means for selectively selecting a normal mode and a small screen moving mode is provided, and cursor moving data is used as the small screen moving data when the small screen moving mode is selected. The television receiver according to Item 1.