KR200274172Y1 - On screen display output apparatus using a digital graphic function - Google Patents

Abstract

Disclosed is an OSD output device for providing a user interface of a complex system for selectively receiving and outputting an analog broadcast signal or a digital broadcast signal, and receiving an analog composite video signal of an analog video decoder to perform horizontal / vertical synchronization. Separating the signal, generating a video pixel clock in phase with the separated horizontal synchronous signal, generating a first horizontal synchronous signal using the video pixel clock as a reference clock, and using the first horizontal synchronous signal as a reference clock. Synchronization signal generating means for generating a first vertical synchronization signal; And generating graphic menu information by using the video pixel clock as a video display reference clock in an analog processing mode, and overlaying the graphic menu information on an analog composite video signal to provide a viewer with digital user interface information. OSD output means.

Description

ON SCREEN DISPLAY OUTPUT APPARATUS USING A DIGITAL GRAPHIC FUNCTION}

The present invention relates to an on-screen display output device using a digital graphics function.

More specifically, the analog / digital composite product uses a digital graphic on-screen display (hereinafter, abbreviated as "OSD") method, as well as an analog user as well as a digital user interface. An on-screen display output device using a digital graphic function to provide an interface.

In general, a device such as a satellite broadcasting receiver that outputs both analog and digital images provides a user interface to a viewer by overlaying a graphic menu signal on a video signal.

1 is a block diagram illustrating a configuration of a prior art OSD output device.

As illustrated, the system clock generator 11 generates and outputs a reference clock, and image information received through the satellite antenna in the digital processing mode is restored using the reference clock of the system clock generator 11. And generating graphic menu information to be overlaid on the reconstructed image information and synchronizing the horizontal / vertical synchronization signal input from the digital / analog converter 14 to be described later to digitally overlay the graphic menu information. The digital video decoder / graphics menu generator 12 for outputting image information, the digital graphic menu information output to the digital video decoder / graphics menu generator 12 and the digital video decoder / graphics menu generator ( A memory 13 for storing the digital image information restored by 12) and horizontal / vertical motion in response to a reference clock of the system clock generator 11; Generating a signal, and outputting the generated horizontal / vertical synchronous signal to the digital video decoder / graphics menu generator 12 and inputting the digital image information and the graphic menu input from the digital video decoder / graphics menu generator 12. A digital / analog converter 14 for converting information into an analog video signal and outputting a video signal in a digital mode, and analog video for decoding an analog video signal received through a satellite antenna in analog processing mode and outputting an analog video signal. A decoder 15, a sync signal generator 16 for receiving an analog video signal output from the analog video decoder 15 and generating a horizontal / vertical sync signal, and a horizontal / A graphic menu signal is generated in response to a vertical synchronization signal, and the graphic menu signal is loaded on the analog video signal. A video signal or graphic of the digital mode of the digital / analog converter 14 in response to a digital menu generator 17 for outputting a video signal in analog mode and a digital / analog mode switch signal input from an external (viewer). It consists of an analog switching unit 18 for selectively outputting the video signal of the analog mode of the menu generator 17.

An operation description of the OSD output device of the analog / digital hybrid satellite receiver configured as described above will be described with reference to FIG. 1.

First, when a digital video signal is selected by a viewer and input through a satellite antenna, the digital video decoder / graphic menu generator 12 digitally converts the digital video signal using a reference clock of the system clock generator 11. Horizontal / vertical synchronization input from the digital / analog conversion unit 14 by restoring the image information and temporarily storing it in the video area of the memory 13 and generating graphic menu information to be overlaid on the restored digital image information. In response to the signal, the graphic image information is overlaid. The digital image information is output. In this case, the graphic menu information is generated by the graphic menu information generating program, and the generated graphic menu information is stored in the graphic menu information area.

The digital image information is input to the digital / analog converter 14, and the digital / analog converter 14 converts the input digital image information into a composite image signal (analog image signal) in a digital mode to convert the analog image into a digital switch. Output to (18).

At this time, the analog switching unit 18 is switched to output the video signal of the digital mode in response to the digital mode switching signal selected by the viewer, the graphic mode of the video signal OSD (graphical menu signal) ) Is overlaid.

Meanwhile, when the analog video signal is selected by the viewer and received through the satellite antenna and input to the analog video decoder 15, the analog video decoder 15 decodes the input analog video signal to synchronize the signal generator 16. ) And to the graphic menu generator 17.

The sync signal generator 16 separates the horizontal / vertical sync signal from the decoded analog video signal and outputs the horizontal / vertical sync signal to the graphic menu generator 17.

The graphic menu generator 17 overlays a graphic menu signal on the analog video signal in response to the horizontal / vertical synchronous signal input from the synchronization signal generator 16 and outputs the graphic menu signal to the analog switch 17. do.

In this case, the analog switching unit 18 may switch and output the video signal of the digital mode and the video signal of the analog mode according to the mode switching signal selected by the viewer, the digital video decoder / graphics menu generator 12 Graphic menu generator included in the) has a graphic menu information that can generate a limited number and special characters and symbols.

As described above, in the conventional analog / digital composite product, each graphic menu generating means is provided to implement the OSD in the analog method and the digital method. There was some unreasonable aspect of implementing a user interface.

In order to solve the above problems, there have been many developments in order to use graphic menu information (digital graphic user interface menu) provided in the digital processing mode in the analog processing mode. If you look like this:

The first embodiment is the application number 10-1997-0067935 (graphic menu overlay device for analog / digital image) filed by Hyundai Electronics Industry Co., Ltd., analog / digital graphic menu overlay device is a control unit, digital video decoder / graphics A menu generator, a reference clock providing unit, an analog video decoder, a synchronization signal generator, and a mixer are essential components, and the digital video decoder / graphics menu generation unit is provided to the reference clock provided by the reference clock providing unit under control of the controller. In synchronization, the digital video signal is decoded, and a graphic menu to be overlaid when the digital video signal is displayed and when the analog video signal is displayed is digitally generated according to the vertical / horizontal synchronization signal.

The synchronization signal generator generates a vertical / horizontal synchronization signal by dividing an analog video decoder that outputs the vertical / horizontal synchronization signal included in the analog video signal and a reference clock provided by the reference clock providing unit under the control of the controller. And phase-synchronize the vertical / horizontal synchronization signal generated by dividing the vertical / horizontal synchronization signal transmitted from the analog video decoder with the reference clock to the digital video decoder / graphic menu generator, wherein the mixer is configured to output the digital video decoder / graphic. The digital signal output from the menu generator and the analog video signal output from the analog video decoder are overlaid under the control of the controller.

A second embodiment of the present invention is Patent Application No. 10-1998-0024309 filed by Handan Information Co., Ltd. (Graphical User Interface Menu Display Apparatus and Display Method), which is a digital graphic menu generator, A memory, a synchronization signal generator, a D / A converter, and an analog switch are essential components. First, the synchronization signal generator receives an analog video signal and a main clock, and receives a horizontal sync signal and a vertical sync signal from the analog video signal. And a first horizontal synchronizing signal and a first vertical synchronizing signal synchronized with the main clock from the detected horizontal synchronizing signal and the vertical synchronizing signal. The digital graphic menu generator reads the digital graphic user menu stored in the memory to generate a digital graphic user interface menu signal synchronized with the first horizontal synchronizing signal and the first vertical synchronizing signal, and generates the digital graphic user interface. When outputting menu position information, which is information about a position at which a menu signal is output, the digital / analog converter converts the digital graphic user interface menu signal output from the graphic menu generator into an analog graphic user interface menu signal, and the analog switching unit The analog image signal, the analog graphic user interface menu signal, and the menu position information are received, and the analog image signal and the analog graphic user interface according to the menu position information. And displaying the analog signal on a graphical user interface menu, the analog video signal by switching the menu signal.

As described above, in the two embodiments, the technology is implemented so that the graphic menu information (digital user interface) used in the digital processing mode can be used in the analog processing mode in the analog / digital composite product. For example, after stabilizing the horizontal / vertical synchronous signal detected in the analog video signal, the graphic menu information synchronized with the stabilized horizontal / vertical synchronous signal is output so that the vibration caused by the graphic menu information is affected by the analog video signal. In the digital processing mode, there is a problem that a graphic menu (user interface menu) having a color different from that displayed on the screen may be provided.

The present invention has been made to solve the above problems, and the digital graphic for providing analog user interface as well as digital user interface using a digital graphic OSD method in the analog / digital composite products The purpose is to provide an on-screen display output device using the function.

In addition, the present invention uses the video pixel clock generated by matching the phase of the horizontal sync signal of the analog video signal in the analog processing mode as the video display reference clock, thereby matching the color sync of the graphic menu information to the color sync of the analog video signal. An object of the present invention is to provide an on-screen display output device using a digital graphic function for providing a graphic user interface menu with a graphic menu of the same color as the color displayed on the screen in mode.

In addition, the present invention synchronizes the graphic menu information by regenerating the horizontal / vertical synchronization using the video pixel clock generated by matching the phase with the horizontal synchronization signal of the analog video signal. An object of the present invention is to provide an on-screen display output device using a digital graphic function for providing a user interface menu.

1 is a block diagram illustrating a configuration of a conventional on-screen display output device;

Figure 2 is a block diagram for explaining the configuration of the on-screen display output device of the present invention,

3 is a block diagram of a synchronization signal generator applied to FIG. 2.

<Explanation of symbols for the main parts of the drawings>

110: analog video decoder 120: synchronization signal generator

121: Dongshin symbol separation unit 122: PLL unit

123: horizontal synchronous signal generator (counter) 124: vertical synchronous signal generator (counter)

130: system clock generator 140: clock switching unit

150: digital video decoder / graphics menu generator

160: memory 170: digital / analog converter

180: synchronization signal switching unit 190: overlay signal switching unit

200: video signal mixing unit

In order to achieve the object of the present invention as described above, the present invention is an OSD output device for providing a user interface (user interface) of a complex system for selectively receiving and outputting an analog broadcast signal or a digital broadcast signal, Receives the analog composite video signal, separates the horizontal / vertical sync signal, generates a video pixel clock in phase with the separated horizontal sync signal, and generates a first horizontal sync signal using the video pixel clock as a reference clock; Synchronizing signal generating means for generating a first vertical synchronizing signal using the first horizontal synchronizing signal as a reference clock; And generating graphic menu information by using the video pixel clock as a video display reference clock in an analog processing mode, and overlaying the graphic menu information on an analog composite video signal to provide a viewer with digital user interface information. It provides an on-screen display output device using a digital graphics function, characterized in that the OSD output means.

The present invention also provides a digital OSD output means, the clock switching unit for receiving and outputting the video pixel clock of the synchronization signal generating means in the analog processing mode; Generate and store OSD bitmap data by using the video pixel clock as a video display reference clock, convert the stored OSD bitmap data into image data to generate graphic menu information, and generate the generated graphic menu information into the first horizontal line. A digital video decoder / graphics menu generator for outputting in synchronization with a first vertical synchronization signal and outputting an overlay signal so that the graphic menu information can be overlaid with an analog video signal; A digital / analog converter configured to receive the first horizontal / first vertical synchronization signal and convert graphic menu information input from the digital video decoder / graphic menu generator into an analog signal; A synchronization signal switching unit which switches to output the first horizontal / first vertical synchronization signal to the digital video decoder / graphics menu generation unit and the digital / analog conversion unit only when an analog processing mode is selected; An overlay signal switching unit for outputting an overlay signal output from the digital video decoder / graphics menu generator in an analog processing mode; And an image signal outputting by overlaying a graphic menu signal output from the digital / analog converter on the analog composite video signal output from the analog video decoder using the overlay signal input from the overlay signal switching unit as a switching signal. It provides an on-screen display output device using a digital graphics function, characterized in that the mixing unit.

The present invention also provides a synchronization signal generating means for synchronizing the horizontal / vertical synchronization signal from the analog video signal input through the analog video decoder; A phase lock loop (PLL) unit for generating a video pixel clock whose phase is synchronized with the horizontal synchronization signal separated by the synchronization separator; A horizontal synchronous signal generator configured to generate and output a first horizontal synchronous signal based on the video pixel clock; And a vertical synchronous signal generator configured to generate and output a first vertical synchronous signal by using the first horizontal synchronous signal as a reference clock.

In the on-screen display output device using the digital graphics function of the present invention, the graphic menu signal is a digital graphic user interface.

In addition, in the on-screen display output device using the digital graphics function of the present invention, the graphic menu signal is characterized in that the user interface generated by the YUV format or YC format or composite video signal.

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

The present invention receives an analog composite video signal of an analog video decoder, separates a horizontal / vertical sync signal, generates a video pixel clock in phase with the separated horizontal sync signal, and sets the video pixel clock as a reference clock. A synchronization signal generating means for generating a horizontal synchronization signal and generating a first vertical synchronization signal using the first horizontal synchronization signal as a reference clock; and using the video pixel clock as a video display reference clock in analog processing mode; Digital OSD output means for generating menu information and overlaying the graphical menu information on an analog composite video signal to provide digital user interface information to a viewer.

The detailed configuration of the present invention comprising the synchronization signal generating means and the digital OSD output means will be described with reference to FIGS. 2 or 3 as follows.

2 is a block diagram illustrating a configuration of an on-screen display output device of the present invention.

As shown, the configuration of the OSD output device in the analog / digital composite system is as follows.

The analog video decoder 110 decodes the analog video signal selected by the viewer and received through the satellite antenna and outputs the analog video signal.

The sync signal generator 120 receives the analog video signal of the analog video decoder 110 and separates the horizontal and vertical sync signals, generates a video pixel clock using the separated horizontal sync signals, and generates a video pixel clock. A first horizontal synchronizing signal is generated using the first horizontal synchronizing signal, and a first vertical synchronizing signal is generated using the first horizontal synchronizing signal.

The system clock generator 130 generates a reference clock.

When the digital processing mode is selected by the viewer, the clock switching unit 140 receives and outputs the reference clock of the system clock generator 130. When the analog processing mode is selected by the viewer, the clock switching unit 140 of the synchronization signal generator 120 is selected. It receives and outputs the video pixel clock.

When the reference clock is input through the clock switching unit 140, the digital video decoder / graphic menu generator 150 restores the digital video signal input through the satellite antenna in response to the reference clock, and restores the digital video signal. Graphic menu information is generated and overlayed, and the digital menu signal overlaid with the graphic menu information is output as digital image information in synchronization with a horizontal / vertical synchronization signal input from the digital / analog converter 170. In this case, the reference clock is used as the video display reference clock (color synchronization signal).

In addition, the digital video decoder / graphics menu generator 150 generates and stores OSD bitmap data using the video pixel clock input through the clock switching unit 140 as a video display reference clock, and stores the stored OSD bits. Converts map data into image data to generate graphic menu information, and outputs the generated graphic menu information in synchronization with the first horizontal / first vertical synchronization signal of the synchronization signal generator 120. The overlay signal is output so that it can be overlaid with the analog video signal. At this time, the video pixel clock is used as a video display reference clock (color synchronization signal). Therefore, it is possible to generate graphic menu information in which the analog image signal matches the color sync.

That is, the digital video decoder / graphics menu generator 150 may first include a memory (described later) to generate graphic menu information in which the first horizontal / first vertical synchronization signal of the synchronization signal generator 120 is synchronized. Information about coordinates and color values necessary for generating a graphic menu is read from the 160 and converted into OSD bitmap data, and the converted OSD bitmap data is stored in the memory 160. The digital video decoder / graphics menu generating unit 150 converts the OSD bitmap data stored in the memory 160 into image data to generate graphic menu information, and digital / analog conversion to describe the generated graphic menu information. Output to the unit 170.

The memory 160 stores information about coordinates and color values necessary for generating a graphic menu, and the digital video decoder / graphics menu generator 150 uses information about coordinates and color values required for generating the graphic menu. To save the created OSD bitmap data.

The OSD bitmap data is later provided to the user as graphical menu information.

In addition, the memory 160 stores the image information restored by the digital video decoder / graphic menu generator 150.

The digital / analog converter 170 generates a horizontal / vertical synchronous signal in the digital processing mode and outputs the digital / video decoder / graphic menu generator 150 to the digital video decoder / graphic menu generator 150. When the digital image information is input, it is converted into an analog composite video signal and outputted. In the analog processing mode, the graphic menu input from the digital video decoder / graphic menu generator 150 receives the first horizontal / first vertical synchronization signal. The information is converted into an analog video signal (graphic menu signal) and output.

The synchronization signal switching unit 180 outputs the first horizontal / first vertical synchronization signal output from the synchronization signal generator 170 only when the analog processing mode is selected, to the digital video decoder / graphic menu generator 150 and the digital device. It is switched to output to the / analog converter 170.

The overlay signal switching unit 190 outputs the overlay signal output from the digital video decoder / graphics menu generating unit 150 as a switching signal of the image signal mixing unit 200 to be described later in the analog processing mode.

The image signal mixer 200 outputs an analog image signal in which the graphic menu information output from the digital video decoder / graphic menu generator 150 is overlaid in the digital processing mode, and the overlay in the analog processing mode. The graphic menu signal output from the digital / analog converter 170 is overlaid on the analog video signal output from the analog video decoder 110 by using the overlay signal input from the signal switching unit 190 as a switching signal. And print it out.

The graphic menu signal may be implemented as a digital graphic user interface or a user interface generated by a YUV format, a YC format, or a composite video signal.

The YUV is an abbreviation used when referring to an analog luminance signal and a chrominance signal in a component video system. Y denotes a luminance signal, and U and V denote two central subcarriers used in the PAL method. It is processed and used to modulate the PAL subcarriers on the U and V axes. This mix occurs because U and V are associated with the color chrominance signal, and they are not the same. In addition, YC means Y is a luminance signal and C means a color signal.

3 is a block diagram of a synchronization signal generator applied to FIG. 2.

As shown, the sync signal generator 120 may include a sync separator 121 that separates a horizontal / vertical sync signal from an analog video signal input through the analog video decoder 110 and the sync separator. A phase lock loop (PLL) unit 122 for generating a video pixel clock whose phase coincides with the horizontal synchronous signal separated by the horizontal synchronization signal, and a horizontal synchronous signal for generating and outputting a first horizontal synchronous signal using the video pixel clock as a reference clock. And a signal generator 123 and a vertical synchronous signal generator 124 for generating and outputting a first vertical synchronous signal using the first horizontal synchronous signal as a reference clock.

The PLL unit 122 receives the horizontal synchronization signal separated by the synchronization separator 121 as a reference clock of the phase comparator, receives the oscillation output of the voltage controlled oscillator as a comparison signal, and detects a phase difference. A phase comparator for generating an error voltage proportional to a low pass filter for low pass filtering the error voltage, a voltage controlled oscillator for varying an oscillation frequency in response to the filtered error voltage, and dividing the low pass filtered value into a video pixel. It consists of a divider that generates a clock.

The video pixel clock is used as a video display reference clock. The video pixel clock is a color synchronizer of graphic menu information generated by the digital video decoder / graphic menu generator 150 in analog processing mode. By matching, it is possible to remove the interference pattern that may be caused by the color synchronization is not matched, and to remove the phenomenon that the color is not visible at all or does not reproduce in the original color.

Referring to the operation of the on-screen display output device of the present invention configured as described above are as follows.

As shown in FIG. 2, when a digital video signal is selected by a viewer and received through a satellite antenna, the digital video decoder / graphic menu generator 150 is generated by the system clock generator 130 to generate the clock switch 140. The digital image signal is restored and stored in the memory 160 in response to the reference clock input through the digital clock signal. The graphic menu information, which is a digital user interface, is also generated and stored in the memory 160.

In addition, the digital video decoder / graphic generator 450 reads information on coordinates and color values required to generate the graphic menu stored in the memory 460, and then stores the system clock of the system clock generator 430 in the video display reference clock. After the bitmap data is generated, it is stored in the memory 460.

The digital video decoder / graphic generator 450 converts the bitmap data stored in the memory 460 into image data to generate graphic menu information, and restores the generated graphic menu information to the memory 450. Synthesize a digital video signal.

The digital video decoder / graphic generator 450 outputs the synthesized digital video signal in synchronization with the horizontal / vertical synchronization signal of the digital / analog converter 470.

Accordingly, the digital video signal is a reconstructed digital video signal or a digital video signal overlaid with graphic menu information which is a user interface.

The digital image information is output to the digital / analog converter 170, converted into an analog composite video signal, and then output through the image signal mixer 200.

Meanwhile, when the analog video signal is received by the viewer and received through the satellite antenna and input to the analog video decoder 110, the analog video decoder 110 decodes the analog video signal as shown in FIGS. 2 and 3. To output an analog composite video signal.

The analog composite video signal is output to the sync signal generator 120 and the video signal mixer 200.

Then, the sync signal generator 120 separates the horizontal sync signal and the vertical sync signal from the analog composite video signal using the sync signal separator 121. The horizontal synchronization signal thus separated is input to the PLL unit 122.

That is, the PLL unit 122 includes a phase comparator, a low pass filter, a voltage controlled oscillator, and a divider, which are general components, and the phase comparator uses a horizontal clock signal separated by the synchronization separator 121 as a reference clock. The oscillation output of the voltage controlled oscillator is supplied as a comparison signal to detect a phase difference and generates an error voltage proportional to the phase difference. The low pass filter performs low pass filtering on the error voltage, and the voltage controlled oscillator performs the filtering. The oscillation frequency is varied in response to the received error voltage, and the divider divides the low pass filtered value to generate a video pixel clock.

The PLL unit 122 generates a video pixel clock whose phase coincides with a horizontal synchronizing signal, and receives the video pixel clock of the horizontal synchronizing signal generator 123 as a reference clock to stabilize the phase. A signal is generated, and the vertical synchronous signal generator 124 receives the first horizontal synchronous signal and generates a first vertical synchronous signal whose phase is stable by using it as a reference clock.

As described above, the video pixel clock generated by the synchronization signal generator 120 is input to the digital video decoder / graphics menu generator 150 through the clock switch 140, and the first horizontal / vertical synchronization signal is synchronized. The signal is output to the digital video decoder / graphics menu generator 150 through the switch 180. The video pixel clock input to the digital video decoder / graphics menu generator 150 is used as a video display reference clock, which is a color synchronizer of the graphic menu information generated by the digital video decoder / graphics menu generator 150. Match the color synchronizer of the image composite signal.

The digital video decoder / graphics menu generator 150 receiving the video pixel clock converts the area for processing the digital image signal into a disabled state, and keeps only the graphic menu information generation area in an enabled state. Bitmap data for generating graphic menu information, which is a graphical user interface of the type, is generated and stored in the memory 160.

Here, the graphic menu information generation process of the digital video decoder / graphics menu generator 150 will be described in more detail as follows. The memory 160 stores information about coordinates and color values necessary for generating the graphic menu.

The digital video decoder / graphics menu generator 150 reads information about coordinates and color values necessary for generating a graphic menu from the memory 160 and converts the information into OSD bitmap data using a video pixel clock. The converted OSD bitmap data is stored in the memory 160.

Next, the digital video decoder / graphics menu generating unit 150 converts the OSD bitmap data stored in the memory 160 into image data to generate graphic menu information, and converts the generated graphic menu information into the first horizontal / In synchronization with the first vertical synchronization signal, the digital / analog converter 170 outputs the overlay signal to the overlay signal switching unit 190.

The overlay signal switching unit 200 is switched so that the overlay signal is output as the switching signal of the image signal mixing unit 190 in the analog processing mode.

The digital / analog converter 170 converts the graphic menu information into an analog and outputs the graphic menu signal to the image signal mixer 200. Then, the image signal mixing unit 200 overlays the graphic menu signal on the analog composite image signal by the overlay signal input by the overlay switching unit 190 and outputs the overlay.

The present invention is not limited to the embodiments described above, and various modifications and changes can be made by those skilled in the art, which are included in the spirit and scope of the present invention defined in the appended claims.

As described above, the present invention achieves the effect of providing an analog user interface as well as a digital user interface using a digital graphic OSD method in an analog / digital composite product.

In addition, the present invention uses the video pixel clock generated by matching the phase of the horizontal sync signal of the analog video signal in the analog processing mode as the video display reference clock, thereby matching the color sync of the graphic menu information to the color sync of the analog video signal. In this mode, a graphic user interface menu can be provided using a graphic menu of the same color as the color displayed on the screen.

In addition, the present invention synchronizes the graphic menu information by regenerating the horizontal / vertical synchronization using the video pixel clock generated by matching the phase with the horizontal synchronization signal of the analog video signal. The effect of being able to provide a user interface menu is achieved.

Claims (5)

delete In the OSD output device for providing a user interface of a complex system for selectively receiving and outputting analog broadcast signal or digital broadcast signal, Inputs the analog composite video signal of the analog video decoder to separate the horizontal and vertical synchronization signals, generate a video pixel clock in phase with the separated horizontal synchronization signal, and use the video pixel clock as a reference clock for first horizontal synchronization. Synchronizing signal generating means for generating a signal and generating a first vertical synchronizing signal using the first horizontal synchronizing signal as a reference clock; And A digital OSD that generates graphic menu information by using the video pixel clock as a video display reference clock in the analog processing mode, and provides the user with digital user interface information by overlaying the graphic menu information on an analog composite video signal. Including output means, The digital OSD output means, A clock switching unit which receives and outputs the video pixel clock of the synchronization signal generating unit in the analog processing mode; Generate and store OSD bitmap data by using the video pixel clock as a video display reference clock, convert the stored OSD bitmap data into image data to generate graphic menu information, and generate the generated graphic menu information into the first horizontal line. A digital video decoder / graphics menu generator for synchronizing the first vertical synchronization signal and outputting an overlay signal so that the graphic menu information can be overlaid with an analog video signal; A digital / analog converter for receiving the first horizontal / first vertical synchronization signal and converting graphic menu information input from the digital video decoder / graphic menu generator into an analog signal; A synchronization signal switching unit which is switched to output the first horizontal / first vertical synchronization signal to the digital video decoder / graphics menu generation unit and the digital / analog conversion unit only when an analog processing mode is selected; An overlay signal switching unit for outputting an overlay signal output from the digital video decoder / graphics menu generating unit in an analog processing mode; Image signal mixture for outputting by overlaying the graphic menu signal output from the digital / analog converter to the analog composite video signal output from the analog video decoder using the overlay signal input from the overlay signal switching unit as a switching signal On-screen display output device using a digital graphics function, characterized in that consisting of. 3. The synchronizing signal generating means according to claim 2, A synchronization separator for separating a horizontal / vertical synchronization signal from the analog video signal inputted through the analog video decoder; A phase lock loop (PLL) unit for generating a video pixel clock whose phase is synchronized with the horizontal synchronization signal separated by the synchronization separator; A horizontal synchronous signal generator configured to generate and output a first horizontal synchronous signal based on the video pixel clock; And And a vertical synchronous signal generator configured to generate and output a first vertical synchronous signal based on the first horizontal synchronous signal as a reference clock. The on-screen display output device using a digital graphic function according to claim 2, wherein the graphic menu signal is a digital graphic user interface. The method of claim 2 or 4, wherein the graphic menu signal, On-screen display output device using a digital graphics function, characterized in that the user interface generated in YUV format, YC format or composite video signal format.