KR0143531B1 - Color video printing apparatus and method thereof - Google Patents

Abstract

The present invention prints image data using a memory of a digital video device in a color video printer using output data of a digital video device as an input source.

To this end, the color video printer device of the present invention includes a memory for receiving and storing the image data obtained by converting a composite image signal into digital data, and a first memory-third memory for storing image data of R, G, and B, respectively. And a video controller configured to control the operation of the memory and convert image data into R, G, and B data in the memory, and separately store the image data in the first memory to the third memory in units of screens. The printing apparatus sequentially generates an address for reading R, G, and B data stored in the first memory-third memory in units of vertical lines, and supplies the address to a read address of the first memory-third memory. Receives the output of 1 memory-third memory and sequentially selects R, G, B data received by the selection signal of the print control unit on a screen basis, and prints the selection data. Printed by access by fisherman's strobe clock.

Therefore, the color video printer can print process data of a digital video device without having a separate memory.

Description

Color video printer device and method

1 is a configuration diagram of a conventional color video printing apparatus using the output of an image device as an input source.

2 is a configuration diagram of a video printing apparatus of the present invention using the output of a digital image device as an input source.

3 is a characteristic diagram of reading data from the image memory of FIG.

＊ Explanation of symbols for main parts of drawing

211: video controller 212: memory

213: hang address generator 214: heat address generator

215: address selection unit 216: first memory

217: second memory 218: third memory

219: D / A converter 220: Print control unit

221: data selector 222: line memory

223: intermediate modulation part

The present invention relates to a color video printer device and method, and more particularly, to a color video printer device and method using an output of a digital image device as an input source.

In general, color video printers are devices for printing image signals output from video equipment. 1 is a configuration diagram of a conventional color video printer, a system control unit 111 for controlling the overall operation of a color video printer, a decoder 113 for converting a received composite video signal into R, G, and B signals; A / D converters 114-116 for converting the R, G, and B signals stored in the decoder 113 into digital data, and digital data output from the D / A converters 114-116 in units of frames. Frame memory 117-119, a memory controller 112 for controlling operations of the A / D converters 114-116 and the frame memories 117-119 under the control of the system controller 111; A D / A converter 120 for converting data output from the frame memories 117-119 into analog video signals, and an encoder for converting analog video signals output from the D / A converter 120 into a composite video signal. 121 and the encoder 121 A monitor 122 displaying a composite video signal to be output; a multiplexer 123 for selecting digital image data output from the frame memories 117-119 under the control of the system controller 111; and a data selector 123. A line memory 124 that stores the digital image data to be output in units of lines, and image data that outputs the line memory 124 to a complementary color relationship, and converts the TPH (Thermal Printer Head) by a preset gray scale value. It is composed of an intermediate tone control unit 125 for generating a pulse signal for driving.

Referring to the configuration of the conventional color video printer with reference to the configuration of FIG. 1, the composite video signal applied to the decoder 113 is an analog signal and is a signal generated from a video device such as a video camera or a television. When the composite video signal as described above is received, the decoder 113 decodes the received composite synchronization signal and converts it into an R, G, and B signal. The A / D converters 114-117 sample and output the analog R, G, and B signals output from the decoder 113 into digital data under the control of the memory controller 112. The frame memories 117 to 119 respectively store digital image data of R, G, and B that output the A / D converters 114 to 116 under frame control, under the control of the memory controller 112. In this case, the frame memories 117-119 may be configured in field units. The digital data of R, G, and B outputting the frame memories 117-119 are converted into analog R, G, and B signals through the D / A converter 120, and the encoder 121 converts the analog R, G, and B signals. To convert to composite video signal. Therefore, the monitor 122 can display the composite video signal generated from the analog video devices.

The digital data outputting the frame memories 117-119 are applied to the data selector 123. The data selector 123 sequentially selects and outputs R, G, and B data received under the control of the system controller 111. At this time, the data selector 123 sequentially selects and outputs R, G, and B data one screen each under the control of the system controller 111. The line memory 124 stores R, G, and B data output by the data selector 124 in units of one line. The halftone control unit 125 converts the R, G, and B data stored in the line memory 124 into C, M, and Y data having a complementary color relationship, and compares them with a preset gray scale value. Outputs the pulse signal corresponding to Then, the TPH generates a print operation by generating heat according to the width of the pulse signal outputting the halftone control unit 125. That is, the color print operation is performed by sequentially processing the C, M, and Y signals.

When printing the image signal generated from the analog video device as described above, since the color video printer device processes the digital data, the received composite video signal is converted into R, G, B signals and then converted into digital data. In addition, a memory for storing them in units of screens should be provided separately. Current video equipment, however, uses digital image processing. Therefore, the conventional color video printer device as shown in FIG. 1 cannot process digital image data output from a digital image device.

It is therefore an object of the present invention to provide a color video printer apparatus and method capable of printing digital image data generated from a digital image device.

It is another object of the present invention to provide an apparatus and method for printing digital image data using a memory of a digital image device in a color video printer device.

In order to achieve the above object of the present invention, the present invention, the video control means for controlling the input and output of the image data output from the digital video device, and the image data can be read in the vertical line unit under the control of the video control means Means for generating addresses, memories for storing the R, G, and B image data received under the control of the video control means, and outputting the image data being stored by the read address, and by the video control means. Print control means for synchronously controlling the output of print data, means for receiving the output of the memories and sequentially outputting R, G, B data under the control of the print control means, and under the control of the print control means Means for printing the output of the selection means in a vertical line unit do.

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

Many specific details are set forth in the following description in order to provide a more thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details.

2 is a block diagram of an apparatus for printing digital image data output from a digital video apparatus according to the present invention, and the video controller 211 receives and processes digital image data output from the digital video apparatus. The memory 212 stores the received digital image data under the control of the video controller 211, and outputs the data stored under the control of the video controller 211. A row address generator 213 generates a row address for reading image data being stored under the control of the video controller 211. A column address generator 214 generates a column address for reading image data being stored under the control of the video controller 211. The address selector 215 receives the output of the row address generator 213 and the output of the column address generator 214, and selectively outputs the row address and column address under the control of the video controller 211. The row address generator 213, column address generator 214, and address selector 215 serve as means for generating an address for vertically reading image data being stored. The first memory 216 and the third memory 218 respectively receive R, G, and B data, and store R, G, and B data received by the write address output from the video controller 211, respectively. The lead data output from 215 outputs the image data of the vertical array being stored. The first memory 216 stores R picture data of one screen size, the second memory 217 stores G picture data of one screen size, and the third memory 218 stores B picture data of one screen size. . Therefore, the first and third memories 216-218 may store image data in a field unit or a frame unit. The A / D converter 219 converts the R, G, and B data output from the memories 216-218 into analog image signals and outputs the analog image signals. The analog image signals may be output to display means such as a monitor. Such a configuration may be a configuration in a digital video device.

The print controller 220 is operated by a print enable signal PEN generated from the outside and is synchronized with the first strobe clock SCK1 output from the video controller 211. The print controller 220 generates a data selection signal SEL and a second strobe clock SCK2 in synchronization with the first strobe clock SCK1. The data selector 221 receives R, G, and B data output from the memories 216 to 218, respectively, and sequentially selects and outputs the R, G, and B data in one screen unit by the data selection signal SEL. . The line memory 22 stores the output of the data selection unit 221 in units of one print line, and is output in synchronization with the second strobe clock SCK2. The halftone converter 223 receives the output of the line memory 222 and compares the grayscale value to generate a pulse signal for generating TPH by printing. The line memory 222, the halftone conversion section 223 and the TPH (not shown) serve as printing means. Such a configuration becomes a configuration exclusively used in color video printers, and therefore, the memory 216-218 in the digital video apparatus can be used in common without using a separate memory when printing the image data.

3 is a structural diagram of the first memory 216 to the third memory 218, and illustrates a process of selecting vertically arranged image data stored in the memory 216-218 at the time of reading. The read address is generated by the row address generator 213 and the column address generator 214. The row address generation unit 213 and the column address generation unit 214 are provided with a counter and the like, and the Re (Row end) position of the row address generation unit 213 perpendicular to the memories 216-218 under the control of the video control unit 211. The row address is sequentially increased to read the image data of < RTI ID = 0.0 > and < / RTI > when the Re-th image data is read, the row address generation unit 213 is initialized to control the image data of the first position to be read again. Increment the column address of the generator 214 by one. Therefore, as shown in FIG. 3, when reading the image data stored in the memory 216-218, when the column address to be read is determined, the row addresses for accessing the image data at the determined column address position are sequentially arranged. It can be seen that it is authorized. When all of the image data located in the corresponding column is read, the open dress is increased by one, and then the row addresses are sequentially increased again as above. Accordingly, it can be seen that the memories 216 to 218 store R, G, and B data one screen by the video controller 211, and the data of vertically arranged positions are sequentially output by the read address.

Referring to the present invention based on the above-described configuration, when the digital video apparatus reads and processes image data stored in an auxiliary storage device such as a compact disc and a tape, the read image data are stored in the memory 212 under the control of the video controller 211. . For example, when image data stored on a compact disc is to be displayed on a general monitor, when image data recorded on the disc is picked up, the picked up data is stored in a memory by the video controller, and the stored image The data are separated into respective R, G, and B data by the video controller and stored in each buffer memory. The image data stored in the respective buffer memories are converted into analog image signals and displayed on a general monitor.

Accordingly, the image data received from the digital video device is stored in the memory 212 under the control of the video controller 211, and the image data stored in the memory 212 is divided into R, G, and B data by the video controller 211 and the memory 216. Stored at -218. At this time, the video controller 211 generates a write address in the memories 216-218. At this time, the R, G, and B data stored in the memories 216-218 are in field or frame units.

The memories 216-218 are configured as shown in FIG. In this case, each of the R, G, and B data stored in the memories 216-218 should be transmitted by one vertical line of data so that the TPH can be printed. In FIG. 3, (,) means (hang address, column address). First, the leftmost vertical line positions of the memories 216-218 are (0,0), (1,0), (2,0),. Read image data of one vertical line stored in (Re, 0). Here, Re is a row address where the last image data of the corresponding vertical line position is stored. The second vertical line position (0,1), (1,1), (2,1),... Read image data of one vertical line stored in (Re, 1). Therefore, the method of reading the image data stored in the memories 216-218 first specifies a column address, generates a row address that is sequentially increased, and reads one vertical line of image data located in the designated column. When this is completed, the above method is repeated by designating the next column address again. In this order, reading to the Ce (Column end) line, which is the last column address of the memories 216-218, ends reading of image data for one screen.

The read addresses of the memories 216 to 218 are generated by the row address generator 216, the column address generator 214, and the address selector 215. The row address generator 213 and the column address generator 214 are controlled by the video controller 211. The row address generator 213 sequentially increases the count up to Re, which is the last image data address constituting the vertical lines of the memory 216-218, and performs a count function. The column address generator 214 is the row address generator. After 213 outputs to Re, it executes a count function that increments once. Therefore, the column address output by the column address generator 214 designates a column of the memories 216-218, and the row address generator 213 generates a row address that is sequentially increased to read image data located in the designated column. do. Then, the address selector 215 selects the output of the column address generator 214 at one vertical line period under the control of the video controller 211 to set the vertical line position of the memories 216-218, and then sets the row address of the set vertical line position. Selectively outputs the outputs of the row address generator 213 that occur sequentially. Accordingly, the memories 216 to 218 read-out the R, G, and B data stored in units of one vertical line by the output of the address selector 215.

When the video controller 211 reads out image data stored in the memories 216-218, the video controller 211 outputs the first strobe clock SCK1 corresponding to the output period of the image data to the print controller 220. At this time, when the print enable signal PEN is received from the outside, the print controller 220 controls to print the image data output from the memories 216-218. First, the print controller 220 generates a selection signal SEL for selecting an output of the memories 216 to 218 when printing starts. In general, color video printers print image data in a plane-sequential manner. This means that R data of one screen size is printed first, G data of one screen size is printed next, and B data of one screen size is printed again. Therefore, the data selection unit 221 selects the output of the R memory 216 so that the R data of one screen unit can be output by the selection signal SEL output to the print control unit 220, and then G data of one screen unit is selected. The output of the G memory 217 is selected to be output, and the output of the B memory 218 is selected so that the B data in one screen unit can be output again. Therefore, the selection signal SEL output from the print controller 220 is generated in a cycle in which image data of one screen size can be output, and the data selection unit 221 is output in units of one vertical line by the selection signal SEL. These outputs are switched and output in one screen cycle.

The image data for one vertical line outputting the data selector 221 is stored in the line memory 222, and the line memory 222 converts the image data being stored into the intermediate memory by the second strobe clock SCK2 generated from the print controller 220. Output to 223 Then, the halftone converter 223 converts the received image data into color and simultaneously converts the image data into a pulse signal capable of maintaining a uniform print density by comparing with a preset grayscale value. Then, TPH (not shown) prints the image data on the print paper by the pulse signal output from the halftone converter 223.

Therefore, in the printed form, the R data, the G data, and the B data are sequentially printed in units of one screen, and when the corresponding image data of one screen is printed, the image data is printed in units of one vertical line.

As described above, the color video printer according to the present invention can print using the memories of the digital imaging apparatus without using separate print-only memories when printing the image data processed by the digital imaging apparatus. It also has the effect of minimizing image quality degradation that can occur through the data path.

Claims (6)

A color video printer device using output data of a digital video device as an input source, comprising: video control means for controlling input and output of image data output from the digital video device, and images in a vertical line unit under the control of the video control means; Means for generating addresses capable of reading data, memories for storing R, G, and B image data received under the control of the video control means, and outputting image data being stored by the read address; Print control means for controlling the output of print data synchronized with the video control means, means for receiving the output of the memories and sequentially outputting R, G, B data under the control of the print control means; Under the control of the print control means, the output of the selection means is printed in vertical lines. Color video printer device, characterized in that consisting of a means for bit. The method according to claim 1, wherein the read address generating means includes a counter for counting the number of image data constituting one vertical line, and is sequentially incremented under the control of the video control means, and resets the row address to be reset upon completion of counting. And a row address generating means for generating a row address and a counter for counting the number of image data constituting one horizontal line, the column address generating means for generating a column address which is increased with a reset period of the row address generating means. And a lead address for accessing image data in memories in units of one vertical line. The color video printer device according to claim 2, wherein the data selection means receives the outputs of the memories and sequentially outputs the R, G, and B data in units of screens under the control of the print control means. 4. The image processing apparatus according to claim 3, wherein the printing means has a line memory for designating image data of one vertical line under the control of the print control unit, and a preset gray scale value, and compares the image data outputting the line memory with the gray scale value. And means for converting into a pulse width signal, and means for generating heat by the pulse width signal to print on a sheet of paper. A color video printer device using output data of a digital video device as an input source, comprising: a memory for receiving and storing the image data obtained by converting a composite video signal into digital data, and storing image data of R, G, and B, respectively; Controlling the operation of the first memory and the third memory and the memory, and converting the image data into R, G, and B data in the memory and separately storing the image data in the first memory and the third memory in units of screens. And a video controller, a row address generator and a column address generator, and sequentially sequentially sequentially read an address for reading R, G, and B data stored in the first and third memories in a vertical line unit under the control of the video controller. Means for supplying to the read addresses of the first memory and the third memory, and converting the outputs of the first memory and the third memory into analog image signals. Means for converting to a composite video signal for display on a monitor, a print control unit for generating a signal for selecting R, G, B data in units of screens and a strobe clock for outputting print data under the control of the video control unit; A data selection unit which receives the outputs of the first memory and the third memory and sequentially selects and outputs the R, G, and B data received by the selection signal of the print control unit on a screen basis; And means for storing and accessing and printing by the strobe clock of the print control unit. A method of printing image data processed by a digital video apparatus having a first memory-a third memory, the method comprising: converting the received image data into R, G, and B data and converting the received image data into size in units of screens; Separately storing and storing the image data stored in each line from the first vertical line to the last vertical line in sequence; Sequentially outputting R, G, and B image data for one screen three times; sequentially selecting the first and third memories in one screen cycle, and selecting the image data of the selected memory in a vertical line unit. Color video, characterized in that it comprises a step of printing the output image data three times in a surface sequential manner How printer.