JPH1155687A - Character display device and method, and recording medium recording character display program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display information such as characters on a superimposed video image in an easy to see way in the device on which graphic data and a video image are synthesized and displayed through the use of a color key. SOLUTION: A color key acquisition section 1 acquires a color key for superimposing, a pattern generating section 2 generates a background pattern by combining a color key acquired the color key acquisition section 1, a specific pattern and a color key. An information generating section 3 generates information such as characters desired to be displayed on a video image in a designated color. A synthesis section 4 uses a content outputted from the pattern generating section 2 for a background and synthesizes information such as characters outputted from the information generating section 3 and provides an output of the result as graphic data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character display device that combines graphic data and a video image using a color key for display.

[0002]

2. Description of the Related Art Conventionally, in order to draw a character or the like on a superimposed video image on a personal computer, a color key is painted on the background of the character, and the character is drawn on the background. Was visible.

[0003]

However, in the above method,
There is a problem that it is very difficult to read if the color of the text is very similar to the video image.

The present invention solves the above-mentioned conventional method. By using a combination of a color key and a specific pattern as a background of a character, a pseudo-low brightness area is created. It is an object of the present invention to always make information such as characters displayed in a state easy to read.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an apparatus for synthesizing and displaying graphic data and a video image using a color key. An acquisition unit, a pattern generation unit that combines a color key and a specific pattern acquired by the color key acquisition unit, an information generation unit that generates information such as characters to be displayed on a video image, It is composed of a synthesizing unit that paints out the output data as a background, synthesizes the output data from the information generating unit, and displays the synthesized data.

[0006] With this configuration, it is possible to create a region in which the luminance is reduced in a pseudo manner without adding any special hardware, and it is possible to always keep the information displayed thereon in an easily readable state.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to an apparatus for synthesizing and displaying graphic data and a video image using a color key, and a color key obtaining section for obtaining a display color of the color key, and the color key obtaining section. A pattern generation unit that combines the color key and the specific pattern obtained in step 1, an information generation unit that generates information such as characters to be displayed on the video image, and an output data from the pattern generation unit that is painted over as a background. A character display device including a combining unit that combines and displays output data from the information generating unit, and has an operation of always making displayed information easy to read.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a block diagram of a character display device according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a color key acquisition unit, which acquires a color key for superimposition and paints a color key on an area of the graphic data where a video image is desired to be displayed. Reference numeral 2 denotes a pattern generation unit that generates a background pattern as shown in FIG. 2 by combining the color key acquired in 1 with a specific pattern and a color key. An information generation unit 3 generates information to be displayed on a video image in a specified color. A synthesizing unit 4 synthesizes the background of the content output from the pattern generation unit and the content output from the information generation unit as shown in FIG. 3 and outputs the result as graphic data.

The present invention is realized by a program, and can be implemented by another independent computer system by recording and transferring the program on a recording medium such as a floppy disk.

[0010]

Next, specific examples of the present invention will be described.

(Embodiment 1) An example in which the character display device of the present invention is implemented in realizing a subtitle broadcasting function in a personal computer will be described with reference to FIGS.

FIG. 4 is a block diagram of the present embodiment. Reference numeral 5 denotes a tuner for receiving radio waves, which separates video image data and character multiplexed data. Reference numeral 6 denotes a video decoder which temporarily stores a video image in a digital memory as shown in FIG. Reference numeral 7 denotes a character multiplexing decoder. If the transmitted data is subtitles, graphic data as shown in FIG. 6 is created by the character display device of the present invention.
The data created by the synthesis circuit is as shown in FIG.
As for the background of the part where the characters are displayed, the part where the color key is painted by the pattern generation part can see through the image, and the part painted black becomes opaque, so that the brightness has been reduced artificially, The characters are easy to read.

[0013]

As described above, according to the present invention, it is possible to create a region in which the luminance is reduced in a pseudo manner without adding special hardware, and to display information such as characters displayed thereon. The advantageous effect of always making it easy to read is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of a character display device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an output example of a pattern generation unit in the character display device.

FIG. 3 is a diagram showing an output example of a combining unit in the character display device.

FIG. 4 is a block diagram according to an embodiment of the present invention.

FIG. 5 is a view showing an example of a video image in the embodiment.

FIG. 6 is a view showing an example of graphic data in the embodiment.

FIG. 7 is a view showing a final output example in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Color key acquisition part 2 Pattern generation part 3 Information generation part 4 Synthesis part 5 Tuner 6 Video decoder 7 Character decoder 8 Character display device 9 Synthesis circuit 10 Display

Claims (3)

[Claims] An apparatus for synthesizing and displaying graphic data and a video image using a color key, comprising: a color key acquisition unit for acquiring a display color of the color key; and a color key acquired by the color key acquisition unit. A pattern generating unit that combines a specific pattern, an information generating unit that generates information such as characters to be displayed on a video image, and an output data from the pattern generating unit. A character display device comprising a combining unit for combining and displaying output data. 2. A method for synthesizing graphic data and a video image using a color key and displaying the combined image, comprising: a color key obtaining step of obtaining a display color of the color key; and a color key obtained in the color key obtaining step. A pattern generation step of combining a key and a specific pattern; an information generation step of generating information such as characters to be displayed on a video image; and an information generation step of filling output data from the pattern generation step as a background. A character display method comprising a combining step of combining and displaying output data from a computer. 3. A recording medium storing a program for displaying graphic data and video data by synthesizing the video data using a color key, the color key obtaining step of obtaining a display color of the color key, and the color key obtaining step. A pattern generation step of combining the color key obtained in the step with a specific pattern, an information generation step of generating information such as characters to be displayed on the video image, and a pattern in which output data from the pattern generation step is filled in as a background. And a combining step of combining and displaying output data from the information generating step.