JP3358305B2 - 2D pattern insertion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-dimensional pattern insertion apparatus for inserting arbitrary two-dimensional patterns, for example, different character information into a plurality of paths or a plurality of ICs.

[0002]

2. Description of the Related Art Conventionally, for example, a block configuration in which different character insertion is performed for each of four outputs in one input signal is as shown in FIG. That is, as the character insertion device in this configuration, a character insertion control I called an on-screen display (On Screen Display) for a plurality of output paths or a plurality of ICs.
C (hereinafter referred to as OSD-IC) 4 and a signal processing IC 5 for generating an insertion signal to be superimposed and for selecting the output of the generated insertion signal and the original output signal.

The signal processing IC 5 receives, for example, a video signal which forms a background for superimposition of characters via an input terminal 50. In the signal processing IC 5, this video signal is supplied to various signal processing circuits (not shown). Among these various signal processing circuits, the signal processing IC 5 generally adjusts the timing of the video signal. The signal processing IC 5 includes a synchronization separation circuit 51 and a character insertion unit 52a.
Is provided. The video signal is also supplied to the synchronization separation circuit 51 and the character insertion section 52a. The synchronization separation circuit 51 separates the horizontal synchronization signal H and the vertical synchronization signal V based on the supplied video signal, and
3 and 54 to the OSD-IC 4. Based on these supplied synchronization signals, the OSD-IC 4
A switching selection signal corresponding to a plurality of paths is output to the signal processing IC5. For example, in FIG. 3, eight switching selection signals W1 to W4 and B1 to B4 corresponding to four outputs are used for signal processing I.
Output to C5. The signal processing IC 5 includes switching selection signals W1 to W supplied through terminals 55 to 62, respectively.
4, four character insertion units 52a to 5 incorporating B1 to B4
Switching selection signals W1 and B1, W2 and B for 2d
2, W3 and B3, and W4 and B4 are supplied two by two.

Here, the basic configuration of the character insertion unit will be briefly described with reference to FIG.

The character insertion unit includes a black signal generation circuit 521 for generating a signal of a black level, and a selection switch SW.
51, a white signal generation circuit 522 for generating a signal of a white level, and a selection switch SW52. Switching selection signals B and W are supplied from the OSD-IC 4 to these selection switches SW51 and SW52, respectively. In FIG. 4, the selection switch SW51 switches the input terminal 5 by switching and selecting the switching selection signal B to the terminal a.
The main video signal supplied from 0 is selected and supplied to one terminal a of the selection switch SW52.

Next, the selection switch SW52 selects one of the signal from the selection switch SW51 and the signal from the white signal generation circuit 522 according to the switching selection signal W. In FIG. 4, a selection switch SW52 indicates selection of an output signal from the white signal generation circuit 522. By being selected in this manner, at this time, the character insertion sections 52a to 52a-5
2d individually outputs a white signal. Character insertion unit 52a
-52d have a function of selecting any one of the input video signal, the inserted black signal and the white signal. These four character insertion sections 52a to 52
d is output via output terminals 63-66. For this reason, the output signal processing IC 5 needs eight switching selection signals in order to maintain the independence of the output signals into which white or black characters are inserted.

[0007]

By the way, as shown in FIG. 3, for example, as shown in FIG. 3, when four different characters are inserted into one input signal, four character insertion units must be provided. Must. OSD-IC
As described above, a total of ten signal lines are required between the signal processing IC 5 and the signal processing IC 5, as described above, eight switching selection signals and two synchronization signals are provided independently for the four character insertion units 52 a to 52 d. Become. As is apparent from this, as the number of outputs increases in the signal processing IC 5, the number of input terminals of the character insertion switching selection signal increases by two.

However, the increase in the number of pins in the signal processing IC 5 increases the chip cost in terms of area.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a two-dimensional pattern insertion device capable of reducing the number of communication signal lines between an OSD-IC and a signal processing IC. With the goal.

[0010]

According to the present invention, there is provided a two-dimensional pattern insertion apparatus for inserting an arbitrary two-dimensional pattern into signals of a plurality of paths. O for outputting a data signal for controlling insertion of a two-dimensional pattern and a control signal for controlling insertion of a two-dimensional pattern for each of a plurality of paths;
An SD-IC and a signal processing IC for inserting a two-dimensional pattern signal into a plurality of path signals in accordance with a data signal and a control signal from the OSD-IC. An insertion signal selection switch for switching and selecting an insertion signal according to a data signal from the IC, and a character insertion selection switch for switching and selecting an output signal from the insertion signal selection switch and a plurality of paths according to a control signal. It is characterized by comprising.

Here, the inserted first selection switch is a first selection switch.
A two-dimensional pattern signal is formed by switching between a black signal and a white signal according to the insertion control signal.

The control signal is provided independently for each of a plurality of paths. The signals of the plurality of paths are signals constituting a two-dimensional image such as a video signal and an image signal.

[0013]

In the two-dimensional pattern insertion apparatus according to the present invention, the signal processing IC selects, for example, an insertion signal on a screen according to the data signal supplied from the OSD-IC to the insertion signal selection switch, and outputs the signal from the OSD-IC. By selecting a character insertion selection switch for each output and switching between a plurality of path signals and a two-dimensional pattern signal in response to a control signal supplied independently, for example, selection of a character pattern and an originally input video signal can be performed. At the time of insertion into a screen, even if the number of signal lines supplied to each character insertion unit is one less than the number of conventional signal lines, it is possible to output a different character pattern to the video signal. I have.

The insertion signal selection switch is connected to the OSD-
One of a black signal and a white signal is selected according to a data signal supplied from the IC, and a two-dimensional pattern signal having a black outline in a white character, for example, is output.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a two-dimensional pattern insertion device according to the present invention will be described below with reference to the drawings. Here, in the embodiment of the two-dimensional pattern insertion device, a character insertion device that superimposes, for example, character information on a video signal as information will be described.

As shown in FIG. 1, for example, a character insertion device controls an OSD-IC1 for controlling insertion of information into a plurality of paths or a plurality of ICs, and a signal output in response to a switching control signal from the OSD-IC1. And a signal processing IC 2 for switching selection.

The OSD-IC 1 has, for example, an original video signal into which a character is inserted via the input terminal 20, and generally converts the horizontal synchronizing signal H and the vertical synchronizing signal V adjusted in timing by the signal processing IC 2. It supplies a data signal D which is character information and a control signal CTL which is character selection information to the signal processing IC2. This data signal is
Signal processing IC using SD-IC1 and one serial line
2 is connected. The data signal is supplied to the signal processing IC 2 as insertion data of all two-dimensional patterns to be superimposed on, for example, a video signal of a plurality of paths with character information which is one of the two-dimensional patterns.

The OSD-IC 1 has a plurality of paths (or a plurality of ICs) that also output a control signal CTL.
The signal processing I is performed using a single serial line as a control signal line for selecting a two-dimensional pattern to be inserted in correspondence with each signal.
Connected to C2.

The signal processing IC 2 performs signal processing on the input video signal through various signal processing circuits, and performs a horizontal synchronizing signal H and a vertical synchronizing signal V from the video signal whose timing has been adjusted. Synchronization separation circuit 2 for separating
1 and a character insertion unit 22 corresponding to the number of outputs to be supplied to a plurality of paths (or a plurality of ICs). The character insertion units 22a to 22d and 4 correspond to the output number 4 in FIG.
One is provided.

Each of the character insertion sections 22a to 22d
For example, it is configured as shown in FIG. Character insertion unit 2
2a to 22d are respectively a black signal generation circuit 221;
A white signal generation circuit 222, an insertion signal selection switch SW1 for switching output signals from the black signal generation circuit 221 and the white signal generation circuit 222, and a character insertion selection for switching between the insertion signal selection switch SW1 and a video signal which is a main line signal. And a switch SW2.

The black signal generation circuit 221 outputs the signal to the terminal a of the insertion signal selection switch SW1,
Reference numeral 22 outputs to the terminal b of the insertion signal selection switch SW1.

The insertion signal selection switch SW1 is connected to the OSD-
The black signal generation circuit 221 and the white signal generation circuit 222 according to the character data sequentially supplied from the IC 1
And outputs the selected signal to one terminal a of the character insertion selection switch SW2.

The character insertion selection switch SW2 is connected to the OSD-
The output signal from the insertion signal selection switch SW1 and the originally displayed video signal are switched and selected according to the control signal CTL according to the control signal supplied to each character insertion unit from the IC1.

Here, the black signal generation circuit 221 and the white signal generation circuit 222 include, for example, the character insertion sections 22a to 22a.
d, for example, the insertion signal selection switch SW
When connected to the terminal a side and the terminal b side of 1a to SW1d, respectively, the character insertion device can simplify the circuit configuration.

The operation of the character insertion unit will be described briefly with reference to FIG.

When performing character insertion, in the initial state at the time of power-on, the insertion signal selection switch SW1 selects the terminal a side, and the character insertion selection switch SW2 selects the terminal b side. As a result, first, the character insertion device outputs a video signal.

Next, since the color of the outline is black at the timing of the outline of the character, the insertion signal selection switch SW
1, the character insertion selection switch SW2 is switched to the terminal b side. As a result, a black signal of the outline corresponding to the character information is output from the character insertion selection switch SW2.

Next, when the character information corresponding to the white portion of the character is supplied as data, the insertion signal selection switch SW1 is operated so that the output from the white generation circuit 222 is obtained according to the supplied character information. Switch to terminal b side. Since the generated white signal is supplied to the video signal, the character insertion selection switch SW2 is left as it is.

At the timing of the outline of the character surrounding the white portion, the insertion signal selection switch SW1 is switched to the terminal a to insert black in place of the video signal.

Finally, the character insertion selection switch SW2 is switched to the terminal "b" in order to output the input video signal as it is to the area where character insertion is not performed.

Note that the insertion of all two-dimensional patterns is 1
By selecting the two signal lines to generate a two-dimensional pattern signal, the selection result of the insertion signal selection switch SW1, that is, the two-dimensional pattern signal is converted to one terminal of the character insertion selection switch SW2 of the other three character insertion units. The same operation can be performed even when the signal is supplied to the a side, so that the insertion signal selection switch S in the character insertion units 22b to 22d is used.
W1b to SW1d can be omitted, and the circuit configuration can be further simplified.

Although an example of character information has been described as a two-dimensional pattern, the two-dimensional pattern may be a pattern like a figure.

Referring to FIG. 1 again, the case where different characters are inserted and output from the four output terminals 27 to 30 will be described.

The OSD-IC1 supplies, for example, common character information, or supplies a data signal D of, for example, character information corresponding to each output to the signal processing IC2. Signal processing IC
In 2, the data signal D corresponding to each of the plurality of passes is supplied to each of the character insertion units 22a to 22d. Character insertion unit 2
In the case of 2a to 22d, when the same character pattern is inserted in all of the plurality of paths, all of the character insertion selection switches SW2a to SW2d of the respective character insertion units 22a to 22d are switched to the terminal a side of the switches. This causes a common character to be inserted into all four outputs.

By the way, when an arbitrary character is inserted in each character insertion section in accordance with data, it is impossible to insert a character at the same position on the screen for each of the four characters. This is because the character information supplied to each output is supplied sequentially. In order to solve this problem, the character information and the control signals supplied to the character insertion units 22a to 22d are given an order, and for example, after the data signal of the signal processing IC 2 is branched, each of the character insertion units 22a to 22d
Between the insertion selection switches SW1a to SW1d (not shown) and the four terminals 23 to 26 to which the control signal of the signal processing IC 2 is supplied and the character insertion selection switches SW2a to SW2d of the character insertion units 22a to 22d. May be inserted with delay circuits.

The delay amount of each delay circuit is determined by the character insertion unit 22a.
22d, the insertion signal selection switch and the character insertion selection switch of the character insertion unit to which the character information is supplied first are set to the largest values, and thereafter, the delay is adjusted so as to reduce the delay amount.

As a result, different characters can be inserted into the same position at the same timing of the horizontal synchronizing signal H and the vertical synchronizing signal V even with four outputs.

With the above configuration, the OSD
A character insertion unit 22a using one data line and independent control lines corresponding to a plurality of paths from IC1;
To 22d are provided in the signal processing IC2 to perform switching control, thereby selecting a two-dimensional pattern signal to be inserted and a signal of a plurality of paths. That is, for example, characters are superimposed on a video signal and a different pattern is applied to each output. When the character is output, each character insertion unit 2 in the signal processing IC 2
Even if the output of the lines supplied to 2a to 22d is controlled by only one signal line smaller than the number of the conventional signal lines, the same character insertion can be performed as in the conventional case. In addition, it is possible to reduce the area chip cost, which is a problem depending on the number of pins.

[0039]

According to the two-dimensional pattern insertion device of the present invention, the character provided on the signal processing means by using one data line and independent control lines corresponding to a plurality of paths from the pattern insertion control means. Control switching between the first switching selecting means and the second switching selecting means in the insertion portion, and inserting 2
By selecting a dimensional pattern signal and signals of a plurality of paths, for example, when characters are superimposed on a video signal, and when characters of different patterns are output to respective outputs, each character is inserted into each character insertion unit in the signal processing means. Even if the supplied lines are controlled by only one signal line less than the number of the conventional signal lines, the same character insertion can be performed as in the conventional case. It is possible to reduce the area chip cost, which is dependent on the problem.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of a two-dimensional pattern insertion device according to the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a character insertion unit in the two-dimensional pattern insertion device.

FIG. 3 is a schematic block diagram showing a configuration of a conventional two-dimensional pattern insertion device.

FIG. 4 is a block diagram showing a schematic configuration of a character insertion unit in the two-dimensional pattern insertion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 OSD-IC 2 Signal processing IC 20 Input terminal 21 Synchronization separation circuit 22a-22d Character insertion part 221 Black signal generation circuit 222 White signal generation circuit SW1 Insertion signal selection switch SW2 Character insertion selection switch

Claims (2)

(57) [Claims] 1. A two-dimensional pattern insertion device for inserting an arbitrary two-dimensional pattern into signals of a plurality of paths, wherein a first insertion control signal for controlling insertion of all two-dimensional patterns into the plurality of paths. And 2 for each of the above multiple passes
Pattern insertion control means for outputting a second insertion control signal for controlling the insertion of a dimensional pattern; and a signal for the plurality of paths in response to the first and second insertion control signals from the pattern insertion control means. Above 2
Signal processing means for inserting and processing a dimensional pattern signal; wherein the signal processing means includes first switching selecting means for switching and selecting an insertion signal in accordance with a first insertion control signal from the pattern insertion controlling means. And second switching selecting means for switching and selecting an output signal from the first switching selecting means and a signal of the plurality of paths according to the second insertion control signal. Two-dimensional pattern insertion device. 2. The two-dimensional pattern signal according to claim 1, wherein said first switching selecting means switches a black signal and a white signal of the insertion signal by a first insertion control signal to form a two-dimensional pattern signal. Two-dimensional pattern insertion device.