JPH08278773A - Superimposing device - Google Patents

Abstract

PURPOSE: To provide a superimposing device receiving information such as a character string, etc., formed by a personal computer through a communication means and synthesizing it into a video signal. CONSTITUTION: This device is constituted of the communication means 21 with the personal computer 1, etc., a signal demodulation part 22 demodulating character information such as a character, a coordinate and an attribute, etc., from a communication signal inputted from the communication means, and the character information demodulated by the signal demodulation part 22 is stored in a video RAM 24a. Prescribed character data and read out from a CG 24b stored with a character font based on the stored character information and outputting the character display data. An OSDC 24 outputting a selection control signal for outputting the part of the character display data through selection, a control part 23 controlling the communication means 21, etc., and a selector 26 selecting through switching and outputting the digital video signal inputted to a video input part 25 or the character display data from the OSDC 24 are provided. Thus, the character information inputted from the personal computer, etc., are synthesized into the video signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a superimposing device, and more particularly to a device which controls an on-screen display controller by a personal computer or the like to impose characters on a video signal.

[0002]

2. Description of the Related Art Conventionally, a superimposing device that superimposes information such as characters from a personal computer on a video signal receives information such as characters created by a personal computer as image data through communication means. This was superimposed on the video signal by superimposing means. For this reason, there is no choice but to use a high-speed transmission method such as parallel transmission means or delay the display. On the other hand, for channel display of a television or the like, an on-screen display controller (hereinafter abbreviated as OSDC) is used, and a preprogrammed character string or the like is stored in a storage unit.
A method has been adopted in which the control unit reads out from the CGROM and imposes on the video signal as needed. However, in this configuration, the character string or the like to be imposed is fixed, and when changing the character string or the like, the program had to be changed and stored again in the storage unit.

[0003]

SUMMARY OF THE INVENTION The present invention solves the problems described above, and receives information such as a character string created by a personal computer through ordinary communication means and superimposes it on a video signal. The purpose is to provide a device.

[0004]

In order to solve the above problems, the present invention provides a communication means for communicating with a personal computer and a signal for demodulating character information such as characters, coordinates and attributes from a communication signal input from the communication means. A demodulation unit and a CGR that stores the character information demodulated by the signal demodulation unit in a video RAM and stores a character font based on the stored character information.
OM or C that stores character fonts in a rewritable manner
An on-screen display controller section for reading out predetermined character data from the GRAM to output the character display data, and for outputting a selection control signal for selectively outputting the portion of the character display data, and a control section for controlling the communication means and the like. A selector for switching between the digital video signal input separately from the communication means and the character display data from the on-screen display controller according to the selection control signal and outputting the video information. I am trying to synthesize it into a signal.

[0005]

With the above construction, the superimposing apparatus of the present invention receives character information such as a character string created by a personal computer or the like through the communication means, and uses this character information to display an on-screen display. Controller (O
SDC) is controlled to demodulate a character string or the like, and the input video signal is superimposed and output.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A superimposing apparatus according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of essential parts showing an embodiment of a superimposing apparatus according to the present invention. In the figure, 1 is a personal computer, 2 is a superimposing device, 3 is a plasma display device (PD
P). As shown in the figure, the personal computer 1 operates the keyboard 11 to generate attribute data such as color, size, blinking presence / absence presence / absence in the character information generating unit 13 from the character string produced in the personal computer body 12 or the like. , Character data that specifies the address of the character generator (abbreviated as CG hereinafter) 24b, X- that specifies the display position of the character
Character information corresponding to the Y coordinate data is generated, converted into a communication serial signal by the signal conversion unit 14, and RS-232C.
Etc. are transmitted to the superimposing device 2 from the communication means 15 for serial transmission.

Further, the superimposing device 2 is
The communication unit 21 receives the character information transmitted from the personal computer 1 through the communication unit 15, the signal demodulation unit 22 demodulates the character information, and the control unit 23 is built in the on-screen display controller (OSDC) 24. VRA to do
The character information is temporarily stored in the M24a, the character data is read from the CG 24b at a timing corresponding to predetermined coordinates based on the stored character information, and character display data (Vch) to which a predetermined attribute is added is output controller. A selection control signal (S) for outputting as a digital video signal from the section 24c, and at the same time, selectively outputting the portion of the character display data from the output controller section 24c.
c) is output and the digital video signal (Vd) input from the video input unit 25 and the character display data (Vch) are switched by the selector 26 according to the selection control signal and output, and the combined signal is output by the output unit 27. More information is input to the PDP 3 and displayed. The CG 24b is composed of a ROM for storing character fonts and a rewritable RAM in advance. The CG RAM enables the writing and use of a desired character font by transmitting its address and font information from a personal computer. ing.

As described above, the character information generation unit 13 generates information such as a character string created by the personal computer 1 into predetermined character information, the signal conversion unit 14 converts the information into a communication signal, and the communication unit 15 operates. To the superimposing device 2, and the superimposing device 2 receives this communication signal by the communication means 21, demodulates the character information in the signal demodulation unit 22, and the personal computer in the OSDC 24 based on the character information. The character display data (Vch) such as the character string created in 1 etc. is reproduced, and the character display data (Vch) is combined with the video signal (Vd) input from the video input unit 25 by the selector 26 and output from the output unit 27. The data is input to the PDP 3 and displayed.

FIG. 2 shows a display screen for explaining the operation, FIG. 2-1 is a screen of a character string created by the personal computer 1, FIG. 2-b is a display screen of an input video signal, and FIG. c
Is a synthesized screen. Now, as shown in FIG.
If the character string from the personal computer is sequentially moved from right to left on the screen, the character string on the composite screen shown in FIG. 2-c can also be moved from right to left. Similarly, the color and size of the characters can be changed, and the character string to be combined with the video signal can be controlled by the personal computer.

FIG. 3 shows the character information generated by the character information generation unit 13, and includes attribute data such as color, size, blinking presence / absence and inversion presence, and CGROM.
The 8-bit signal is used to form the character data for designating the address and the XY coordinate data for designating the display position of the character. For example, if the characters are continuously moved as shown in FIG. 2, the XY coordinate data of the generated character information will be continuously changed.

[0011]

As described above, according to the superimposing apparatus of the present invention, character information such as a character string created by a personal computer or the like is received via ordinary communication means,
The on-screen display controller (OSDC) is controlled by this character information to demodulate the character string and the like, and is superimposed on the input video signal for output. It is possible to provide a superimposing device which can be created by, and various controls such as scrolling and changing the color of characters can be performed from a personal computer.

[Brief description of drawings]

FIG. 1 is a block diagram of a part showing an embodiment of a superimposing apparatus according to the present invention.

FIG. 2 shows each screen for explaining the operation of the superimposing apparatus according to the present invention.

FIG. 3 shows an embodiment of character information of the superimposing apparatus according to the present invention.

[Explanation of symbols]

 1 personal computer 2 superimpose device 3 plasma display device (PDP) 11 keyboard 12 personal computer body 13 character information generation unit 14 signal conversion unit 15 communication unit 21 communication unit 22 signal demodulation unit 23 control unit 24 OSDC 24a VRAM 24b CGROM / CGRAM 24c Output controller 25 Video input unit 26 Selector 27 Output unit

Claims (5)

[Claims] 1. A communication means for communicating with a personal computer, a signal demodulation section for demodulating character information such as characters, coordinates and attributes from a communication signal input from the communication means, and character information demodulated by the signal demodulation section. CG which stores in a video RAM and stores a character font based on the stored character information
An on-screen display controller unit that reads out predetermined character data from a ROM or a CGRAM in which a character font is rewritably stored and outputs character display data, and also outputs a selection control signal for selectively outputting this character display data portion. A selector for controlling the communication means and the like; a selector for switching between digital video signals input separately from the communication means and character display data from the on-screen display controller according to the selection control signal; The superimposing device is characterized by synthesizing character information input from a personal computer or the like into a video signal. 2. The character size is displayed on the personal computer or the like from a screen created and displayed by inputting characters with a keyboard.
Character information generating means for generating a predetermined data string such as coordinates corresponding to colors and display positions, signal converting means for converting the character information into a communication signal, and communication means for transmitting the communication signal are provided. The superimposing apparatus according to claim 1, wherein: 3. The write data to the CGRAM is
The superimposing apparatus according to claim 1, wherein the superimposing apparatus is transmitted from the personal computer or the like via a communication means. 4. The superimposing apparatus according to claim 1, wherein the communication means uses a serial transmission method. 5. The superimposing apparatus according to claim 1, wherein the character information includes attribute data such as color, size, blink, presence / absence of inversion, character data, and character coordinate data. .