KR100195247B1 - Superimpose or title mix apparatus using the image of negative film shape - Google Patents

Abstract

Disclosed is an image overlapping and character mixing apparatus using a negative film-shaped image according to the present invention. The image superimposition and character mixing apparatus according to the present invention includes a chroma signal processor for outputting a complementary color made by reversing the chroma signal of the original image and a luminance signal processor for outputting the luminance signal of the original image by black and white inversion.

Therefore, as described above, the image overlapping and character mixing apparatus using the negative film-shaped image according to the present invention converts the luminance signal and the color signal of the original video signal into a negative shape image when the image overlapping or character mixing is performed on the video signal. By replacing the text mixing or superimposition of the desired form with the original image, it converts the dynamic image of the original image into a negative film-like image compared to the conventional image overlap or character mixing to provide a new form of image special effects. Have

Description

Image Overlapping and Character Mixing Device Using Negative Film Shape Image.

The present invention relates to a superimposition and character mixing apparatus of an image signal, and more particularly, to an image overlapping and character mixing apparatus using a negative film-shaped image.

When image superimposition or character mixing is performed on an original image signal in an image processing apparatus such as a camcorder or a video cassette recorder, the conventional technique is a luminance signal level and a color signal stored in a predetermined ROM in accordance with a position control signal for image overlap or character mixing. Replace with the original video signal to implement video overlap or character mixing.

FIG. 1A is a diagram illustrating a conventional color signal image superimposition and character mixing apparatus, and reference numeral 10 denotes an overlapping color generated by generating an overlapping color stored by a superimpose color SELEction (SICSEL). RY color difference signal and superimposed RY color difference signal (SIRY) input by SuperImpose Color BLanK (SICBLK) for controlling the shape and position of the superimposed image. ), One superimposed color mixing controller (SICMIXCTL) which selects one of the BY color difference signal and the overlap BY color difference signal SIBY and replaces the original image signal.

FIG. 1B is a diagram illustrating a conventional luminance signal image superimposition and character mixing apparatus, and reference numeral 14 denotes an overlap luminance generation ROM generating superimposition luminance stored by a super luminance selection signal (SIYSEL). (SuperImpose Y GENeration ROM; SIYGENROM), reference numeral 16 denotes a delay adjusting unit for delaying and outputting the luminance signal Y by the luminance delay control signal YDLYCTL, and reference numeral 18 denotes the shape and position of the superimposed image. A superimposed luminance mixing control unit (SuperImpose Y MIXing ConTroL; SICMIXCTL) which replaces and outputs an original video signal by a superimposed luminance blank signal SuperImpose Y BLanK (SIYBLK).

FIG. 2A is a diagram illustrating an embodiment of an image superimposition and character mixing apparatus in a conventional color signal. The superimposed color generation ROM 10 illustrated in FIG. 1A includes an addressing decoder 101 and an RY color difference signal storage ROM 102. ) And the BY color difference signal storage ROM 103. In addition, the overlapping color mixing controller 12 may include a first multiplexer 121 for selecting the RY color difference signal and the overlapping RY color difference signal, a second multiplexer 122 for selecting the BY color difference signal, and the overlapping BY color difference signal. The first delay unit 123 outputs the signal output from the multiplexer 121 in synchronization with the SCLK signal, and the second delay unit 124 outputs the signal output from the second multiplexer 122 in synchronization with the SCLK. .

In the apparatus shown in FIG. 2A, the superimposed color signal blank signal SICBLK, which is a control signal for designating the position of the image to be superimposed or the character to be mixed, is applied to the superimposed color selection signal SICSEL at the target position of the original video signal. Image superimposition and character mixing of color signals are realized by substituting the color defined by the original image for output.

FIG. 2B is a diagram illustrating an example of an image superimposition and character mixing apparatus in a conventional luminance signal. The superimposed luminance generation ROM 14 illustrated in FIG. 1B includes an addressing decoder 141 and a luminance signal storage ROM 142. ) In addition, the superimposed luminance mixing control unit 18 delays the output of the multiplexer 181 for selecting the delayed luminance signal and the superimposed luminance signal of the luminance signal delay adjusting unit 16 and the signal output from the multiplexer 181 in synchronization with the PCLK. Group 182.

The apparatus shown in Fig. 2B uses the overlap luminance blank signal SIYBLK, which is a control signal for designating the position of the image signal to be superimposed or the character signal to be mixed, at the target position of the original image signal. By substituting the color determined by) into the original image and outputting it, image superimposition or character mixing of luminance signal is realized.

Therefore, in the prior art, if a video superimpose or a title mix of a video signal is to be implemented, a blanking signal at a desired position in the shape of a picture or a character to be superimposed or mixed with the original video signal By deleting the original video signal and replacing it with a specific luminance signal and a predetermined color signal stored in the ROM, the image is placed in place of the original image, thereby implementing image overlap or character mixing. As described above, in the image superimposition or character mixing according to the prior art, the original image signal at a position such as the shape of a picture or character that is the image superimposition or character mixing in the original image is lost, and the luminance signal and the specified color signal of a specific size designated in the ROM at the position are lost. Is a way to replace. This is the simplest form of video nesting or text mixing that gives the impression of dryness.

The present invention has been made to solve the above problems, by converting the luminance signal and the color signal of the original image signal into a negative film-like image to implement image overlap or character mixing, to erase the original image signal and the luminance signal of a predetermined size The object of the present invention is to provide an image superimposition and character mixing device using a negative film-shaped image that exhibits a new image special effect of the dynamic image of the original image, compared to the conventional technology that replaced the predetermined color.

1A is a diagram for schematically illustrating a conventional color signal image superposition and character mixing apparatus.

FIG. 1B is a view for explaining a conventional luminance signal image superimposition and character mixing apparatus.

2A is a diagram illustrating an embodiment of an image overlapping and character mixing apparatus in a conventional color signal.

2B is a diagram illustrating an embodiment of an image overlapping and character mixing apparatus in a conventional luminance signal.

3A is a diagram illustrating a color signal image overlapping and character mixing apparatus according to the present invention.

3B is a view illustrating an image overlapping and character mixing apparatus of a luminance signal according to the present invention.

FIG. 4 is a view for explaining a case of phase inversion of 180 degrees on a color signal vector plane in case of image overlap and character mixing in a color signal according to the present invention.

FIG. 5A is a diagram illustrating a detailed configuration of an apparatus for color signal image overlap and character mixing shown in FIG. 3A.

FIG. 5B is a timing diagram illustrating a specific operation of the apparatus shown in FIG. 5A.

FIG. 6A is a diagram illustrating a detailed configuration of an apparatus for image superposition or character mixing of luminance signals shown in FIG. 3B.

FIG. 6B is a timing diagram illustrating a specific operation of the apparatus shown in FIG. 6A.

According to the present invention to achieve the above object, the image overlapping and character mixing device is a chromaticity signal processing unit for outputting the complementary color produced by the phase inversion of the chromaticity signal of the original image; And

Including a luminance signal processing unit for outputting the black and white by inverting the luminance signal of the original image, it is characterized by implementing the image overlap or character mixing by modifying the shape of the original image.

In one embodiment, the chroma signal processor includes: a color difference phase inversion unit for converting an input R-Y color difference signal and a B-Y color difference signal into phase complementary colors; An overlapping R-Y blank control unit which selects an R-Y color difference inversion signal and an R-Y color difference signal outputted from the color difference phase inversion unit by signals for controlling the shape and position of an overlapped image or a character mixture, and outputs them in synchronization with a predetermined clock; And a superimposed BY blank control unit for selecting the BY chrominance inversion signal and the BY chrominance signal outputted from the chrominance phase inversion unit by a superimposed image or a signal for controlling the shape and position of the character mixture, and outputting them in synchronization with a predetermined clock. desirable.

The luminance signal processor may include: an overlapping luminance signal delay adjuster configured to adjust a delay of a luminance signal according to a delay of a color signal according to a predetermined control signal when an original image of an input luminance signal is overlapped or mixed with a character; In the case where the delayed luminance signal is greater than the white clip level by subtracting the luminance signal whose delay is received from the superimposed luminance signal delay adjustment unit at the white clip level, the monochrome signal is inverted. A luminance signal black and white inverting unit for outputting by replacing the setup level corresponding to black with the luminance signal inverted black and white; A luminance overlap blank delay adjustment unit for adjusting a position delay of the luminance signal of the image during image overlap or character mixing; And an overlapping luminance mixing unit for mixing image superimposition or character mixing and the contour signal of the luminance signal with the original image according to the control of the signal output from the luminance overlapping blank delay adjusting unit.

In the present invention, the chrominance phase inversion unit comprises: a first inverter for inverting the R-Y chrominance signal; A second inverter for inverting the B-Y color difference signal; A third inverter and a buffer for converting the R-Y color difference signal and the B-Y color difference signal into binary complements; A first adder for adding a binary complementary R-Y color difference signal by adding an R-Y color difference signal inverted from the first inverter, an output of the third inverter, and an output of the buffer; And a second adder for adding a B-Y color difference signal inverted from the second inverter, an output of the third inverter, and an output of the buffer to output a binary complementary B-Y color difference signal.

The overlapping R-Y blank control unit includes: a first multiplexer for selecting one of an R-Y color difference signal and a binary complementary R-Y color difference signal by activation of an overlapping blank signal; It may include a first delay unit for receiving a signal output from the first multiplexer and outputs a signal synchronized with the secondary clock (SCK).

The overlapping B-Y blank control unit includes: a second multiplexer for selecting one of a B-Y color difference signal and a binary complementary B-Y color difference signal by activating the overlap blank signal; It is preferable to include a second delay unit for receiving a signal output from the second multiplexer and outputting a signal synchronized with the secondary clock (SCK).

In the present invention, the superimposition luminance signal delay adjusting unit includes at least one delayer for delaying and outputting the input luminance signal by an integer multiple of the primary clock (PCK); And

It is preferable to include a third multiplexer for selecting one of the outputs of the delayers by the luminance delay control signal.

In the present invention, the luminance signal black and white inverting unit comprises: a first register for setting a white clip level signal; A fourth delayer for outputting a white clip level signal delayed to synchronize the output signal of the first register with the PCK; A second register for setting a setup level signal;

A fifth delayer for outputting a setup level signal delayed to synchronize the output signal of the second register with the PCK; A subtractor for subtracting the delayed luminance signal output from the third multiplexer of the superimposed luminance signal delay unit from the signal output from the fourth delay unit; A comparator for comparing the delayed luminance signal and the delayed white clip level signal and outputting the compared signal; And a fifth multiplexer configured to select and output one of an output signal of the subtractor and an output signal of the fifth delayer according to the output signal of the comparator.

In the present invention, the brightness superimposed blank delay adjusting unit includes one or more delayers for delaying and outputting the superimposed blank signal by an integer multiple of PCK; And a fourth multiplexer for selecting one of the outputs of the delayers.

In the present invention, the superimposed brightness mixing section outputs the brightness signal from the superimposed brightness signal delay adjusting section or the brightness signal with the delayed output output from the superimposed brightness signal delay adjusting section or the brightness signal black and white board adjusted by the superimposed blank signal delay adjusting section. And a sixth multiplexer for selecting and outputting the black and white inverted luminance signal outputted from the entirety, and a ninth delay unit for outputting the luminance signal in synchronization with the PCK output signal of the sixth multiplexer.

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

FIG. 3A is a diagram illustrating an apparatus for color signal image superposition or character mixing according to the present invention, wherein reference numeral 30 denotes a color difference phase inversion block, and reference numeral 32 denotes a superimposed RY color difference signal blank control unit (SUPERIMPOSE RY). BLANKING CONTROL BLOCK, and reference numeral 34 denote a superimposed BY color difference signal blank control unit (SUPERIMPOSE BY BLANKING CONTROL BLOCK), respectively. Here, the chrominance phase shifter 30 receives the RY chrominance signal CRY [0: 7] and the BY chrominance signal CBY [0: 7], converts them into binary complement, and converts them into binary complement. 0: 7] and SITSBY [0: 7] are output. As shown in FIG. 4, when the color difference signal processed for image superposition or character mixing is equilibrated with the color signal of the TV frame, the color signal vector is inverted in phase in the plane of the color signal vector, that is, the complementary color. A note performs a function.

The superimposed RY blank control unit 32 controls the shape and position of the image for image superimposition or character mixing, and SITRY [which is the output of the CRY [0: 7] binary complementary phase shifter 0. 0: 7] to determine the position and shape of the image overlap or character mixture image.

The overlap BY blank control unit 34 performs the same function as the overlap RY blank control unit 32 with respect to the BY color difference signal, and receives the SIBLK signal and SITSBY [0: 7] which are output signals of the color difference phase inversion unit 30. Determines the position and shape of image nesting and mixed text images.

3B is a view showing a device for image superimposition or character mixing of a luminance signal according to the present invention, wherein reference numeral 35 denotes a supervisory luminance delay delay adjusting unit, and reference numeral 36 denotes a luminance signal monochrome switching unit. (LUMINANCE BLACK AND WHITE INVERSION BLOCK), reference numeral 37 denotes a luminance overlap blank delay adjustment section, and reference numeral 38 denotes a SUPERIMPOSE LUMINANCE MIX BLOCK, respectively. Input superimposed blank signal, white clip level (WCL), set up level (SUL), etc. to perform image overlap or character mixing, and then output luminance signal processed by image overlap or character mixing. .

Here, the superimposed luminance signal delay adjustment unit 35 adjusts the delay of the luminance signal due to the large delay of the color signal during image overlap or character mixing. YVI [0: 7] input here is the original image of the luminance signal, and YDLYCTL [0: 1] is the delay control signal (LUMINANCE DELAY CONTORL) of the luminance signal.

The luminance signal black-and-white inverting unit 36 receives DCTLY [0: 7], which is a luminance signal whose delay is adjusted, from the superimposed luminance signal delay adjusting unit 35, and at the white clip level WCL [0: 7], the DCTLY [0: 7] is subtracted to generate and output the luminance signal inverted black and white. When DCTLY [0: 7] is larger than WCL [0: 7], the SUL [0: 7] corresponding to black is multiplexed using a comparator. By outputting the luminance signal inverted to black and white using the output, the luminance signal inverted to black and white is output based on WCL [0: 7], which is the maximum luminance signal level.

The luminance superimposed blank delay adjustment unit 37 receives the data YSBDL [0: 7] from the microprocessor and adjusts the delay of the position of the luminance signal of the image superposition or the mixed character video.

The superimposition luminance mixing unit 38 mixes the image superimposition or character mixing and the contour signal of the luminance signal into the original image.

FIG. 5A is a diagram illustrating a detailed configuration of an apparatus for color signal image overlap or character mixing illustrated in FIG. 3A.

The color difference phase inversion unit 30 includes a first inverter 301 for inverting the RY color difference signal CRY [0: 7], a second inverter 302 for inverting the BY color difference signal CBY [0: 7], Inverted from the third inverter 303, the buffer 304, and the first inverter 301 for converting the RY and BY color difference signals CRY [0: 7] (CBY [0: 7]) into binary complement A first outputting binary complementary signal SITSRY [0: 7] by adding CRYI [0: 7], the output TA [1: 7] of the third inverter, and the output TA [0] of the buffer 304. Binary complement is added by adding CBYI [0: 7], the output TA [1: 7] of the third inverter and the output TA [0] of the buffer 304, which are inverted from the adder 305 and the second inverter 302. The second adder 306 outputs a signal SITSBY [0: 7].

The operation of the color difference phase inversion unit 30 configured as described above is as follows.

The input CRY [0: 7] signal is one's complement through the first inverter 301, and the '11111111' TA [1: 7] signal with inverted digits The digit TA [0], which is the number of digits, is added by the first adder 305, so that the CRY [0: 7] signal becomes SITSRY [0: 7] converted to binary complement and input to the overlapping RY blank control unit 32. do. For example, assuming that the signal CRY [0: 7] is '10101010', the first inverter 301 converts the signal to CRYI [0: 7], which is 1's complement '01010101', The TA [1: 7] signal with inverted digits of '0000000' When the TA [0] signal having the number of digits '1' is added by the first adder 305, it becomes '01010110' which is the binary complement of the CRY [0: 7] signal '10101010'.

Similarly, after the input CBY [0: 7] signal is converted into the complement of one through the second inverter 302, the binary '1' is added to the second adder 306 to convert the SITSBY [into binary complement. 0: 7] and input to the overlap BY blank control unit 34.

In addition, the overlapping RY blank control unit 32 receives either the RY color difference signal CRY [0: 7] or the binary-numbered SITSRY [0: 7] signal by the activation signal of the overlap blank signal (SIBLK). Inputting the selected first multiplexer 321 and the CRYSO [0: 7] signal output from the first multiplexer 321 to output the CRYSIVO [0: 7] signal in synchronization with the secondary clock (SCK). It consists of a first delay unit (322).

Similarly, the overlap BY blank control unit 34 generates one of the BY color difference signal CBY [0: 7] or the binary subtracted SITSBY [0: 7] signal by the activation signal of the superimpose blank signal SIBLK. A CBYSO [0: 7] signal output from the second multiplexer 341 to be selected and the second multiplexer 341 is input, and the CBYSIVO [0: 7] signal is output in synchronization with the secondary clock (SCK). And a second delay unit 342.

Next, operations of the overlapping R-Y blank control unit 32 and the overlapping B-Y blank control unit 34 will be described as follows.

However, since the operations of the control units 32 and 34 are the same, only operations of the overlapping R-Y blank control unit 32 will be described in order to avoid duplication of explanation.

The first multiplexer 321 selects and outputs a SITSRY [0: 7] signal when the SIBLK signal is at a high level by a SIBLK signal applied from the outside, and selects a normal RY color difference signal when the SIBLK signal is at a low level. Output it. Receiving the selected CRYSO [0: 7] signal from the first multiplexer 321, the first delay unit 322 outputs the CRYSIVO [0: 7] signal processed with image superposition or character mixing in synchronization with the SCK signal. .

FIG. 5B is a timing diagram illustrating a specific operation of the apparatus shown in FIG. 5A.

FIG. 6A is a diagram illustrating a detailed configuration of an apparatus for image superimposition or character mixing of the luminance signal shown in FIG. 3B.

The superimposed luminance signal delay unit 35 delays and outputs the input luminance signal YVI [0: 7] by an integer multiple of the primary clock PCK. 352) and a third multiplexer 354 for selecting one of the outputs of the delayer by the third delayer 353 and YDLYCTL [0: 1], which is a luminance delay control signal, whose operation is as follows. same. The first to third delay units delayed by an integer multiple of the primary clock (PCK) by the luminance delay control signal YVI [0: 7] by the luminance delay control signal YDLYCTL [0: 1] 351, 352, and 353 are selected to output a DCTLY [0: 7] signal to the luminance signal black and white inverting portion 36 and the overlapping luminance mixing portion 38.

The luminance signal black and white inverting section 36 delays the output signals of the first register 361 and the first register 361 which set the WCL [0: 7] signal by the SET and RESET signals so as to be synchronized with the PCK. 0: 7] output signal of the fourth register 362, the second register 363 and the second register 363 to set the SUL [0: 7] signal by the SET and RESET signals A fifth delay unit 364 for outputting the SULY [0: 7] signal delayed to be synchronized with the second signal; and a DCTLY [0: 7] signal output from the third multiplexer 354 of the overlapping luminance signal delay unit 35; A subtractor 365 subtracting from the delay unit 362 to output the NGAY [0: 7] signal, a comparator 366 and a comparator for comparing and outputting the DCTLY [0: 7] signal and the WCLY [0: 7] signal. And a fifth multiplexer 367 which selects and outputs one of the output NGAY of the subtractor 365 and the output SULY of the fifth delayer 364 according to the output signal of 366. Looking at it as follows. The WCL [0: 7] input from the outside is set in the first register 361, and then becomes the WCLY [0: 7] synchronized with pck in the fourth delay unit 362, so that the subtractor 365 and the comparator 366 Is input to the (+) terminal. In addition, the SUL [0: 7] input from the outside is set in the second register 363, and then becomes a SULY [0: 7] signal synchronized with the PCK in the fifth delay unit 364, so that the fifth multiplexer 367 is received. It is input to the A terminal of). The subtractor 367 subtracts the DCTLY [0: 7] signal from the input WCLY [0: 7] to output the NGAY [0: 7] signal, which is inverted black and white, and is input to the B terminal of the fifth multiplexer 367. The comparator 366 compares the input WCLY [0: 7] with the DCTLY [0: 7], and outputs a high signal when the DCTLY [0: 7] is large so that the fifth multiplexer 367 outputs a SULY [0: 7]. ], And control to output NGAY [0: 7] signal. Otherwise, the output signal SIY [0: 7] of the multiplexer 367 is used to display the luminance signal of the original image. The luminance signal is inverted black and white on the basis of the level WCL [0: 7].

The luminance superimposition blank delay adjusting unit 37 controls the sixth delay unit 371, the seventh delay unit 372, the eighth delay unit 373, and the YSBDLCTL signal to delay and output the SIBLK signal by an integer multiple of the PCK. And a fourth multiplexer 374 which selects one of the outputs of the delayers, and outputs a DCTLSIBLK signal under control of the YSBDLCTL signal.

The superimposed luminance mixing unit 38 is a DCTLY [0: 7] signal or a luminance signal black and white inverting unit outputted from the superimposed luminance signal delay adjusting unit 35 by the control of the DCTLSIBLK signal output from the luminance superimposed blank delay adjusting unit 37. 37. The output signal YSO [0: 7] of the sixth multiplexer 381 and the sixth multiplexer 381 that selects the SIY [0: 7] signal output from the A ninth delay unit 382 outputs the YSIVO [0: 7] signal in synchronization with the PCK. The operation thereof is as follows. The sixth multiplexer 381 selects and outputs SIY [0: 7], which is an output signal of the luminance signal black and white inverting unit 36, when the DCTLSIBLK signal output from the superimposed luminance blank delay adjustment unit 37 is high level, and outputs the DCTLSIBLK signal. If the level is low, the output signal DCTLY [0: 7] of the superimposed luminance signal adjustment unit 35 is selected and output. In addition, the ninth delay unit 382 outputs YSIVO [0: 7] processed by image superposition or character mixing by synchronizing the YSO [0: 7] signal output from the sixth empty multiplexer 381 with the PCK.

FIG. 6B is a timing diagram for the operation of the apparatus shown in FIG. 6A.

As described above, the image superposition and character mixing apparatus using the negative film-shaped image according to the present invention converts the luminance signal and the color signal of the original image signal into a negative image when the image superimposition or character mixing is performed on the video signal. By replacing the character mixture or superimposed image of the form with the original image, the dynamic image of the original image is converted into a negative film-like image compared with the conventional image overlap or character mixture, thereby providing a new form of image special effects.

Claims (10)

In the video overlapping and character mixing device, A chromaticity signal processor for outputting a complementary color generated by reversing the chromaticity signal of the original image; An image superimposition and character mixing device using a negative film-like image, characterized in that to implement image superposition or character mixing by modifying the shape of the original image including a luminance signal processing unit for outputting the black and white by inverting the luminance signal of the original image. The method of claim 1, wherein the chroma signal processing unit A color difference phase inversion unit which phase-inverts the input R-Y color difference signal and the B-Y color difference signal and converts them into complementary colors, respectively; An overlapping R-Y blank control unit which selects an R-Y color difference inversion signal and an R-Y color difference signal outputted from the color difference phase inversion unit by signals for controlling the shape and position of an overlapped image or a character mixture, and outputs them in synchronization with a predetermined clock; And Negative film including a superimposed BY blank control unit which selects the BY chrominance inversion signal and the BY chrominance signal outputted from the chrominance phase inversion unit by a superimposed image or a signal controlling the shape and position of the character mixture and outputs them in synchronization with a predetermined clock; Image superimposition and text mixing device using shape image. The method of claim 1, wherein the luminance signal processing unit A superimposed luminance signal delay adjustment unit for matching the delay of the luminance signal according to the delay of the color signal according to a predetermined control signal when the original image of the input luminance signal is superimposed or mixed; In the case where the delayed luminance signal is greater than the white clip level by subtracting the luminance signal whose delay is received from the superimposed luminance signal delay adjustment unit at the white clip level, the monochrome signal is inverted. A luminance signal black and white inverting unit for outputting by replacing the setup level corresponding to black with the luminance signal inverted black and white; A luminance overlap blank delay adjustment unit for adjusting a position delay of the luminance signal of the image during image overlap or character mixing; And Image superimposition and character mixing using a negative film-shaped image including an image superimposition or character mixing for a luminance signal and an overlapping luminance mixing unit for mixing the contour signal into the original image according to the control of a signal output from the luminance superimposed blank delay adjusting unit Device. The method of claim 2, wherein the color difference phase inversion unit A first inverter for inverting the R-Y color difference signal; A second inverter for inverting the B-Y color difference signal; A third inverter and a buffer for converting the R-Y color difference signal and the B-Y color difference signal into binary complements; A first adder for adding a binary complementary R-Y color difference signal by adding an R-Y color difference signal inverted from the first inverter, an output of the third inverter, and an output of the buffer; And An image overlap using a negative film-shaped image including a BY color difference signal inverted from the second inverter, a second adder for adding a binary output of the third inverter and an output of the third inverter and outputting the buffer; Character mixing device. The method according to claim 2, wherein the overlapping R-Y blank control unit A first multiplexer for selecting one of an R-Y color difference signal or a binary complementary R-Y color difference signal by activation of an overlapping blank signal; The image overlapping and character mixing apparatus of claim 1, further comprising a first delay unit for receiving a signal output from the first multiplexer and outputting a signal synchronized with a secondary clock (SCK). The method of claim 2, wherein the overlap B-Y blank control unit A second multiplexer for selecting one of a B-Y color difference signal or a binary complementary B-Y color difference signal by activation of an overlapping blank signal; And a second delayer for receiving a signal output from the second multiplexer and outputting a signal synchronized with a secondary clock (SCK). The method of claim 3, wherein the overlap luminance signal delay adjustment unit At least one delayer for delaying and outputting the input luminance signal by an integer multiple of the primary clock PCK; And And a third multiplexer for selecting one of the outputs of the retarders by a luminance delay control signal. The method of claim 3, wherein the luminance signal black and white inverting unit A first register for setting a white clip level signal; A fourth delayer for outputting a white clip level signal delayed to synchronize the output signal of the first register with the PCK; A second register for setting a setup level signal; A fifth delayer for outputting a setup level signal delayed to synchronize the output signal of the second register with the PCK; A subtractor for subtracting the delayed luminance signal output from the third multiplexer of the superimposed luminance signal delay unit from the signal output from the fourth delay unit; A comparator for comparing the delayed luminance signal and the delayed white clip level signal and outputting the compared signal; And And a fifth multiplexer configured to select and output one of an output signal of the subtractor and an output signal of the fifth delayer according to the output signal of the comparator. The method of claim 3, wherein the brightness overlap blank delay adjustment unit One or more delayers for delaying and outputting the overlap blank signal by an integer multiple of PCK; and And a fourth multiplexer for selecting one of the outputs of the retarders. The method of claim 3, wherein the overlap luminance mixing unit The luminance signal of which the delay output from the superimposed luminance signal delay adjustment unit is adjusted or the monochrome signal of the monochrome signal inverted from the luminance signal black and white inversion unit is controlled by controlling the superimposed blank signal that is output from the luminance superimposed blank delay adjustment unit. A sixth multiplexer for selecting and outputting; and An image overlapping and character mixing apparatus using a negative film-like image including a ninth delay unit for outputting a luminance signal in synchronization with the PCK output signal of the sixth multiplexer.