JPH0844325A - Two dimensional pattern inserting device - Google Patents

Abstract

PURPOSE:To provide a two dimensional pattern inserting device capable of reducing for example, communication signal lines between OSD-IC (character inserting and controlling IC) and a signal processing IC. CONSTITUTION:Selection for a black color signal and a white color signal is performed by an inserting signal selecting switch SW1 arranged in a character inserting section of a signal processing IC in accordance with a data signal from an OSD-IC, and a character inserting selecting switch SW2 of a character inserting section selects an output signal from the inserting signal selecting switch SW1 or a video signal into which a two dimensional pattern is to be inserted every plural paths with a two dimensional pattern allotted in accordance with a control signal independently supplied from the OSD-IC.

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 inserting device 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 when a different character is inserted into each of four outputs from a signal of one input is shown in FIG. That is, the character insertion device in this configuration has 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 that performs generation of a superimposed insertion signal and output selection of the generated insertion signal and the original output signal.

To the signal processing IC 5, a video signal, which forms a background against the superposition of characters, is input via the input terminal 50. In this 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 also adjusts the timing of the video signal. The signal processing IC 5 includes a sync separation circuit 51 and a character insertion section 52a.
Is provided. The video signal is also supplied to the sync separation circuit 51 and the character insertion section 52a. The sync separation circuit 51 separates the horizontal sync signal H and the vertical sync signal V based on the supplied video signal, and the terminal 5 of the signal processing IC 5 is separated.
It is supplied to the OSD-IC 4 via 3, 54. Based on these supplied synchronization signals, the OSD-IC4
A switching selection signal corresponding to a plurality of paths is output to the signal processing IC 5. For example, in FIG. 3, eight switching selection signals W1 to W4 and B1 to B4 corresponding to four outputs are signal processing I.
It is output to C5. The signal processing IC 5 has switching selection signals W1 to W supplied via terminals 55 to 62, respectively.
4, four character insertion parts 52a to 5 containing B1 to B4
Switching selection signals W1 and B1, W2 and B for 2d
2, W3 and B3, two W4 and B4 are supplied respectively.

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

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

Next, the selection switch SW52 selects either the signal from the selection switch SW51 or the signal from the white signal generation circuit 522 by the switching selection signal W. In FIG. 4, the selection switch SW52 indicates selection of the output signal from the white signal generation circuit 522. By selecting in this way, at this time, the character insertion units 52a-5
2d individually outputs a white signal. Character insertion part 52a
.About.52d have a function of selecting one of the output of the input video signal, the black signal or the white signal to be inserted. These four character insertion parts 52a to 52
d is output via the output terminals 63 to 66. For this reason, the output signal processing IC 5 requires eight switching selection signals in order to maintain the independence of the output signals in which white or black characters are inserted.

[0007]

By the way, the character insertion device must be provided with four character insertion parts each when inserting four different characters into one input signal, as shown in FIG. 3, for example. I have to. OSD-IC
As described above, a total of 10 signal lines are required between the switch 4 and the signal processing IC 5 for each of the four character insertion sections 52a to 52d, which are eight independent switching selection signals and two synchronization signals. Become. As is clear from this, as the number of outputs increases in the signal processing IC 5, the number of input terminals for 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 cost of the chip in terms of area.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and provides a two-dimensional pattern insertion device capable of reducing the number of communication signal lines between the OSD-IC and the signal processing IC, for example. With the goal.

[0010]

A two-dimensional pattern insertion apparatus according to the present invention is a two-dimensional pattern insertion apparatus for inserting arbitrary two-dimensional patterns into signals of a plurality of paths. Outputs a data signal for controlling the insertion of the two-dimensional pattern and a control signal for controlling the insertion of the two-dimensional pattern for each of a plurality of paths.
The signal processing IC has an SD-IC and a signal processing IC that inserts a two-dimensional pattern signal into a plurality of paths according to 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 insertion first selection switch is the first
The black control signal and the white signal are switched by the insertion control signal of 1 to form a two-dimensional pattern signal.

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

[0013]

In the two-dimensional pattern insertion device according to the present invention, in the signal processing IC, for example, the insertion signal is selected on the screen according to the data signal supplied from the OSD-IC to the insertion signal selection switch, and each of the signals from the OSD-IC is selected. The character insertion selection switch is used to switch between a plurality of path signals and a two-dimensional pattern signal for each output in accordance with a control signal supplied independently, thereby selecting, for example, a character pattern and a video signal originally input. Even when the number of signal lines supplied to each character insertion portion is one less than the number of conventional signal lines when inserted into the screen, it is possible to output different character patterns to the video signal. There is.

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

[0015]

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

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

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

The OSD-IC1 also has a plurality of paths (or a plurality of ICs) that also output the control signal CTL.
Signal processing I using a single serial line as a control signal line for selecting a two-dimensional pattern to be inserted corresponding to each
It is connected to C2.

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

The respective character insertion parts 22a to 22d are
For example, it is configured as shown in FIG. Character insertion part 2
2a to 22d are respectively a black signal generation circuit 221 and
Insertion signal selection switch SW1 that switches output signals from the white signal generation circuit 222, the black signal generation circuit 221, and the white signal generation circuit 222, and character insertion selection that switches the insertion signal selection switch SW1 and the video signal that is the main line signal. It is composed of a switch SW2.

The black signal generation circuit 221 outputs to the terminal a of the insertion signal selection switch SW1, and the white signal generation circuit 2
22 is output to the terminal b of the insertion signal selection switch SW1.

The insertion signal selection switch SW1 has an OSD-
A black signal generation circuit 221 and a white signal generation circuit 222 according to the character data sequentially supplied from IC1.
One of the output signals from and is selected and supplied to the terminal a at one end of the character insertion selection switch SW2.

The character insertion selection switch SW2 is an 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 in response to the control signal supplied from the IC1 to each character insertion portion.

Here, the black signal generation circuit 221 and the white signal generation circuit 222 are, for example, each of the character insertion portions 22a to 22.
For example, the insertion signal selection switch SW without being provided in d
When the terminal a side and the terminal b side of 1a to SW1d are respectively connected, the character insertion device can simplify the circuit configuration.

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

When inserting characters, in the initial state when the power is turned 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, the character insertion device first outputs a video signal.

Next, since the color of the contour portion is black at the timing of the contour portion of the character, the insertion signal selection switch SW
1 is left as it is, and the character insertion selection switch SW2 is switched to the terminal b side. As a result, the black signal of the contour portion 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. It is switched to the 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 side and black is inserted instead of the video signal.

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

It should be noted that the insertion of all two-dimensional patterns is 1
The selection result of the insertion signal selection switch SW1, that is, the two-dimensional pattern signal is selected by one of the signal lines to generate a two-dimensional pattern signal, that is, one terminal of the character insertion selection switch SW2 of the other three character insertion portions. Since it can be operated in the same manner even when it is supplied to the a side, the insertion signal selection switch S in the character insertion sections 22b to 22d.
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 such as a figure in addition to this.

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

The OSD-IC1 supplies, for example, common character information and supplies a data signal D of, for example, character information corresponding to each output to the signal processing IC2. Signal processing IC
2, the data signal D corresponding to each of the plurality of paths is supplied to each of the character insertion units 22a to 22d. Character insertion part 2
When inserting the same character pattern into all of a plurality of paths, all of the character insertion selection switches SW2a to SW2d of the character insertion portions 22a to 22d are switched to the terminal a side of the switches 2a to 22d. This inserts a common character in all four outputs.

By the way, when an arbitrary character is inserted in each character insertion portion according to data, it is not possible to insert the character at the same position on the screen for all 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 control signals supplied to the character insertion units 22a to 22d have an order, and, for example, after the data signal of the signal processing IC 2 is branched, each character insertion unit 22a to 22d.
Between the insertion selection switches SW1a to SW1d (not shown) and between 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. You may make it each insert a delay circuit in each.

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 section to which the character information is first supplied are set to the largest value, and the delay amount is adjusted to be smaller.

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

With the above configuration, the OSD
-Character insertion part 22a using one data line from IC1 and independent control lines corresponding to a plurality of paths
22d are provided in the signal processing IC 2 and are switch-controlled to select a two-dimensional pattern signal to be inserted and signals of a plurality of paths, that is, for example, a character is superimposed on a video signal and a different pattern is applied to each output. When outputting the characters, each character insertion unit 2 in the signal processing IC 2
Even if the output of the lines 2a to 22d is controlled by only one signal line less than the number of conventional signal lines, the same character insertion as in the conventional case can be performed. In addition, it is possible to suppress the area-specific 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 characters provided in the signal processing means from the pattern insertion control means using one data line and independent control lines corresponding to a plurality of paths. The first switching selection means and the second switching selection means in the insertion portion are switch-controlled to be inserted 2
By selecting the dimensional pattern signal and the signals of a plurality of paths, for example, when superimposing a character on the video signal and outputting a character of a different pattern to each output, each character insertion unit in the signal processing means Characters can be inserted in the same way as before by controlling the output with only one signal line less than the number of conventional signal lines. This makes it possible to reduce the number of pins, especially when integrated into an IC. Therefore, it is possible to suppress the chip cost in terms of area, which is a problem.

[Brief description of 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]

 1 OSD-IC 2 Signal Processing IC 20 Input Terminal 21 Sync Separation Circuit 22a-22d Character Insertion Section 221 Black Signal Generation Circuit 222 White Signal Generation Circuit SW1 Insertion Signal Selection Switch SW2 Character Insertion Selection Switch

Claims (2)

[Claims] 1. A two-dimensional pattern insertion device for inserting arbitrary two-dimensional patterns 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 paths
Pattern insertion control means for outputting a second insertion control signal for controlling the insertion of the three-dimensional pattern; and signals for the plurality of paths in response to the first and second insertion control signals from the pattern insertion control means. 2 above
Signal processing means for inserting and processing the three-dimensional pattern signal, and first switching selection means for switching and selecting the insertion signal according to the first insertion control signal from the pattern insertion control means in the signal processing means. And second switching selection means for switching and selecting the output signal from the first switching selection means and the signals of the plurality of paths according to the second insertion control signal. Two-dimensional pattern insertion device. 2. The first switching selection means forms a two-dimensional pattern signal by switching between a black signal and a white signal of the insertion signal according to the first insertion control signal. Two-dimensional pattern insertion device.