KR950007537B1 - Circuit and method for superimposing title in an image processing system - Google Patents

Abstract

The title of a scene can be faded in or faded out by using the circuit and method. The circuit includes a title controller(121) for processing fade-in and fade-out of a title, a gain controller(112) for adjusting the gain of video title signal generated by the title controller(121), a selector(113) for selecting the video title signal, an adder(115) for adding output signal of a video signal input unit and the video title signal, a level adjusting circuit(114) for adjusting the level of the output signal of the adder(115), an inserter(116) for selecting input video signal and the video title signal according to output signal of the title controller(121).

Description

Title Super Impose Circuit and Method of Image Processing Equipment

1 is a conventional circuit diagram.

2 is a conventional signal processing operation waveform diagram.

3 is a circuit diagram according to the present invention.

4 is a process flow diagram in the controller 103 of FIG.

5 is a process flow diagram in the title controller 121 of FIG.

The present invention relates to a title superimpose circuit of an image processing apparatus.

In general, a camcorder is used to shoot or edit video. At this time, if a special effect is given when recording the content and title of the video, it may add interest according to shooting and editing.

In the special effects, there is a super imperial function that enlarges a certain specific part. The first diagram is a conventional circuit diagram and the second diagram is a timing diagram.

Referring to the prior art, when the selection signal for the operation is input from the input unit 101, the controller 103 performs a selected operation (Fade in / out) according to the selection of the input unit 101, the synchronization signal input unit ( Like the input signal (2B) of 102, the synchronization signals H_Sync and V_Sync are referenced. The controller 103 outputs the address corresponding to the title NO to be displayed to the address signal generator 104 as shown in (2d). The address signal generator 104 addresses the memory device 105 from a time corresponding to the controller 103. The memory device 105 outputs the image data and the control data as (2e, 2f) according to the addressing.

The image data is RGB data to be displayed, and the control data is data related to display on / off of a title. Since the image data is a digital signal of RGB, an analog composite title signal is generated in accordance with the processing of the D / A converter 106, the matrix unit 107, and the encoder 108 to impose the analog composite video signal. The title signal thus obtained is imposed upon the video signal in accordance with the selection of the control data by the control of the controller 103 via the video signal input device 110.

However, in the related art, there is no method of adding a special effect by simply inserting a title into an image screen.

Accordingly, an object of the present invention is to provide a method and a circuit that can fade in a video title to make a title character larger and fade out to make it smaller.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a circuit diagram according to the present invention, in which a configuration further added from FIG. 1 for fade special processing is connected to the title controller 121 from the controller 103, and the title controller (at the output terminal of the encoder 108). A gain controller 112 for gain control of the title video signal controlled by 121 and a selector 113 for selecting a gain-adjusted video signal title signal, and an output image of the video signal input device 110; An adder 115 that adds a signal and the output of the gain controller 112 is connected therefrom, and the selector 113 is adjusted by adjusting the level of the output of the adder 115 by the output of the title controller 121. The level control circuit 114 and the video signal of the video signal input device 110 and the selected video signal of the selector 113 are selected by the output of the title controller 121. Is composed of the inserter 116 is provided to the video display 111.

4 is a flowchart illustrating a process of inputting a fade selection key according to the present invention. In the first process, when the title number key is generated by Kisken, the address of the corresponding title is generated and the control data is read. If the title signal key is a fade selection, the second step is to set the character fade to fade when the input is made larger and to set the character fade to fade when the output is made smaller.

5 is a flowchart of a title controller according to the present invention, in which a first step of checking a fade input and output when the controller selects whether a control selection signal due to a fade is present, and an insert mode when a fade input is performed in the first step. In the second step of outputting the title video when the title level is at a certain level by increasing the gain and decreasing the level, and selecting the level-adjusted output when the fading output is performed in the first step, the gain and the level are decreased. If the title level is at a certain level, a third step of outputting a video signal is performed.

Therefore, a specific embodiment of the present invention will be described in detail with reference to FIGS. 3 to 5. The present invention superimposes a title signal on a video signal by generating a title to which a special effect of a fade is added when inserting a title such as a subtitle or a picture when capturing and editing a video using a camera integrated VTR (Camcorder). 3 is a system diagram of the present invention.

When the signals of the input unit 101 and the synchronization signal input unit 102 are input to the controller 103, the controller 103 determines the input signal and adds an enable signal to the address generator 104. ) Generates an address signal to address the memory device 105. The memory device 105 generates data corresponding to an address. The data may be divided into control data and image data (eg, RGB), and the control data is used as an input of the controller 103 to display a title as an image signal. Data for insertion into the image, and image data is image data of a title.

The image data is input to a D / A converter 106 for converting a digital signal into an analog signal, and converted into an analog image signal to a matrix unit 107 for converting an RGB signal into a color difference signal (Y, RY, BY). The title video signal is generated through the encoder 108 which converts the color difference signal into the image signals (Y, C). The title signal is input to a gain controller 112 that controls the gain of the title signal, is adjusted after gain, and then added by the adder 115 and the video signal output from the video signal input device 110. The level is adjusted by the level adjusting circuit 114 which adjusts to the level of the video signal. After the level is adjusted, it is input to the selector 113 which selects a signal and a title signal to which a video signal and a title signal are added. The title controller 121 receives the control data of the controller 103, the gain control data of the gain controller 112, the level control data of the level adjusting circuit 114, and the selection control and inserter of the selector 113. The selection control data of 116 is outputted. The inserter 116 switches the video signal and the title signal under the control of the title controller 121 to superimpose the title on the video signal.

In the case of the fade title In, the title controller 121 raises the gain of the gain controller 112 after switching the inserter 116 to 1 and setting the switch of the selector 113 to 0. FIG. . At this time, if the gain rises to a certain level (determined by the initial setting of the title controller), the gain signal is set to 0 to the switch position of the selector 113 so that the title signal is output as it is.

In this case, the video signal and the title signal are displayed in a superimposed manner, and then the title screen becomes clearer as the level of the title signal rises. At this time, when the position of the selector 113 becomes 0, the video signal disappears and only the title screen is displayed.

In the case of fade title out, the gain of the gain controller 112 is maximized while the switch of the inserter 116 is 1 and the switch of the selector 113 is 1, and then the state of the selector 113 is zero. The gain of the gain controller 112 is then gradually lowered. When down to a certain level, the switch of the inserter 116 is set to 0.

In this case, the title image is displayed first when the title and the image overlap, and as the signal level of the title decreases, the title disappears and finally only the image signal is displayed.

That is, the present invention adds a face effect when displaying a title in a conventional superimpose system. The controller 103 receives the control signal of the title controller 121 by the same process as in FIG. Is an apparatus for displaying a title having a fade effect by the same process as in FIG.

When the input of the input unit 101 is a command for fade by Kisken in step (4a), the controller 103 is added with a fade function. In step (4b), the title number key is checked and the corresponding step is performed in step (4h). If the address of the title is generated through the address generator 104 to generate control data from the memory device 105, and the fade key is confirmed in step 4c, the fade in / out is checked in step 4e by checking the fade in / out. Set the control for (4f, 4g).

Accordingly, if the control data is 0, the title controller 121 switches the inserter 116 to 0 in step 5b to output the video signal of the video signal input device. In step (5c), different signals are controlled depending on the case of fade in or fade out. In the case of fading in step (5c), the selector 113 switches the inserter 116 to 1 and then raises the gain of the gain controller 112 in step 5e. The uploaded title signal and video signal are added to the adder 115. The title signal and the video signal then overlap each other. In order to prevent the overshoot of the added signal from occurring, the level is adjusted in the process of 5F as the level adjusting circuit 114. This operation is performed until the full level of the title (about 1Vp-p) is displayed (5g).

After that, the selector 112 is switched to 1 so that only the title signal is output. In the case of fading out, the selector 113 is switched to 0 in step 5I and the gain controller 112 is down in step 5j. The gain down signal and the video signal are added by the adder 115. The level is adjusted by the level adjusting circuit 114 to prevent overshoot of the added signal. This operation is performed until the full level of the title (about 0.1 Vp-p to 0.2 Vp-p) is displayed (5k). After that, the inserter 116 is switched to 0 so that only the image signal is output.

As described above, when inserting a title such as a subtitle or picture when capturing and editing an image, a title with a special effect of fade is generated to superimpose the title on the video signal.

Claims (2)

In a superimposition circuit of an image processing apparatus having a controller 103, an encoder 108, and a video signal input device 110, a title controller 121 is connected from the controller 103 for fade special processing. A gain controller 112 for gain adjusting a title video signal controlled by the title controller 121 and a selector 113 for selecting a gain adjusted video signal title signal at an output of the encoder 108. And an adder 115 for adding the output video signal of the video signal input device 110 and the output of the gain controller 112, and outputting the output of the adder 112 to the title controller 121. Level control circuit 114 to provide a level control circuit 114 to the selector 113 by adjusting a level, and output the video signal of the video signal input device 110 and the selected video signal of the selector 113 to the title control. Is selected by the output of 121 is the title of an image processing apparatus, characterized by consisting of a inserter 116 provided to the video display 111 superimpose circuit. A superimposing method of an image processing apparatus, comprising: a first process of generating an address of a corresponding title when a title number key is used by Kisken to read control data; and an input date if the title signal key is a fade selection in the first process. A second step of setting a character to be faded to a larger value at the time of fading and a smaller value of a character to be faded at an output, and a third process of checking a fade input / output when the control selection signal due to fade is checked from the controller; A fourth step of outputting the title video when the title level is at a predetermined level by turning the gain mode up and down in the insert mode when the fade input is performed in the third step; and adjusting the level when the fade output is performed in the fourth step. Select the output and lower the gain and level so that if the title level is at a certain level, And a fifth process of outputting the title superimposing method of the image processing apparatus.