JPH08256302A - Video printer - Google Patents

Abstract

PURPOSE: To print out an image whose aspect ratio is a:b without a black stripe above and below the image. CONSTITUTION: A black stripe signal is added to a part above and below an image comprising field or frame video signals stored in a frame memory 6 and whose aspect ratio is a:b (a/b>α/β) in the case of printing. Then the printer is provided with an inverse conversion means 8 that applies inverse conversion to the black stripe signal of the video signal converted in a way that its aspect ratio is α:β in the case of printing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video printer capable of printing an image of a video signal in which the aspect ratio of the image when printed is longer than the standard aspect ratio.

[0002]

2. Description of the Related Art A frame memory for storing a field video signal or a frame video signal having a horizontal to vertical aspect ratio of 4: 3 when printed, and a field video signal or a frame video read from the frame memory. In a conventional video printer having a print means to which a signal is supplied, a portion corresponding to the upper and lower sides of the image of a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of the image when printed is 16: 9. When a converted video signal is added with a black band signal added to the image and the horizontal and vertical aspect ratio of the image when printed is 4: 3, the image is accompanied by black bands at the top and bottom. It is printed as it is.

A frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is 4: 3, and a field video signal or a frame video read from the frame memory In a conventional video printer having a print means to which a signal is supplied, a field video signal or a frame video signal having a horizontal-to-vertical aspect ratio of 16: 9 when printed on it is a horizontal video image when printed. When the converted video signal having the aspect ratio converted so that the aspect ratio with respect to the vertical direction is 4: 3 is supplied, the vertically stretched image is printed as it is.

[0004]

In view of the above, the present invention provides a frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is α: β. In a video printer having a printing means to which a field video signal or a frame video signal read from a frame memory is supplied, when printed, the aspect ratio of the image in the horizontal and vertical directions is a: b (a / b> α / β). ) Is converted so that the horizontal and vertical aspect ratio of the image is α: β when printed with black band signals added to the upper and lower parts of the image of the field video signal or frame video signal. When the video signal is stored in the frame memory, an image with a horizontal to vertical aspect ratio of a: b is printed without black bands above and below it. It is intended to propose a thing that can be.

According to the present invention, a frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is α: β, and a field video signal read from the frame memory or In a video printer having a printing means to which a frame video signal is supplied, a field video signal or a frame video signal in which a horizontal-to-vertical aspect ratio of an image when printed is a: b (a / b> α / β) When a black band signal is added to the parts corresponding to the top and bottom of the image and the converted video signal converted so that the horizontal to vertical aspect ratio of the image becomes α: β when printed is stored in the frame memory , Which can print an image having a horizontal to vertical aspect ratio of a: b.

[0006]

According to a first aspect of the present invention, there is provided a frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is α: β, and the frame memory. In a video printer having a printing means to which the field video signal or the frame video signal read out is supplied, the horizontal-to-vertical aspect ratio of the image stored in the frame memory when printed is a: b (a / b> α / β)
Converted video in which the black-band signal is added to the upper and lower parts of the image of the field video signal or frame video signal to be converted, and the aspect ratio of the image when printed is α: β A video printer is provided with an inverse conversion means for performing inverse conversion so as to switch a black band signal of a signal to a white band signal.

According to a second aspect of the present invention, a frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is α: β and a field read from the frame memory. In a video printer having a printing means to which a video signal or a frame video signal is supplied, the aspect ratio of the image stored in the frame memory when printed is a: b (a / b> α / β). The aspect ratio of the converted video signal is converted to a: b so that the aspect ratio of the field video signal or frame video signal when printed becomes α: β when printed. The video printer is provided with a reverse conversion means for returning.

[0008]

According to the first aspect of the present invention, the inverse transformation means
A black portion is stored in the frame memory and corresponds to the upper and lower portions of the image of the field video signal or frame video signal in which the aspect ratio of the image when printed is a: b (a / b> α / β). The band signal is added, and the black band signal of the converted video signal converted so that the horizontal to vertical aspect ratio of the image becomes α: β when printed is inversely converted so as to be switched to the white band signal.

According to the second aspect of the present invention, the horizontal-to-vertical aspect ratio of the image, when printed, stored in the frame memory by the inverse conversion means is a: b (a / b> α / β).
A field video signal or a frame video signal that has the following aspect ratio is converted to have an aspect ratio of α: β when printed, and the aspect ratio of the converted video signal becomes a: b. Will be returned.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. First, the overall configuration of the video printer of the embodiment will be described with reference to FIG. The color video signal from the input terminal 1 is supplied to the A / D converter 2 to be converted into a digital color video signal, and then the digital color video signal is supplied to the RGB (red, green, blue) decoder 3 for digital conversion. Obtain a red signal, a digital green signal and a digital blue signal. If the signal supplied to the input terminal 1 is a monochrome video signal, the RGB decoder 3 is unnecessary.

Reference numeral 4 denotes a changeover switch which is controlled by a CPU 7A of a memory control device 7 described later in accordance with writing and reading to a video memory 6 which will be described later, and includes a movable contact m, a writing side fixed contact w and a reading side fixed contact. equipped with r.

Reference numeral 5 denotes a CPU of a memory control device 7 which will be described later.
Two field memories 6A, 6 constituting the video memory 6 are changeover switches controlled by 7A.
This is for switching the access to B. The changeover switch 5 has a movable contact m and fixed contacts a and b. The fixed contacts a and b are connected to input / output terminals for digital video signals (digital red, green and blue signals) of the field memories 6A and 6B, respectively.
The movable contacts m of the changeover switches 4 and 5 are connected to each other.

The output side of the decoder 3 is connected to the fixed contact w of the changeover switch 4. The fixed contact r of the changeover switch 4 is connected to a Y (yellow) M (magenta) C (cyan) converter. The YMC converter 8 converts the digital red signal, the digital green signal, and the digital blue signal obtained from the fixed contact r of the changeover switch 4 into a digital yellow signal, a digital magenta signal, and a digital cyan signal. A D / A converter for converting each digital color signal into an analog color signal, and a converter for converting into a signal according to a printing method by a head (line head) (for example, a thermal head) 9 are also provided.

A video memory 6 is composed of two field memories 6A and 6B, each of which has a capacity for storing one field of a color video signal, and
It has an extra storage area necessary for signal processing and the like described later.

Next, the memory control device 7 will be described. 7A is a CPU, which includes a ROM 7B and a RAM 7C. Reference numeral 7a denotes an operation unit for the CPU 7A, which includes a plurality of operators, and various operation signals are supplied to the CPU 7A by operating the operators. Reference numeral 7D is a signal generator (generation circuit) that generates a write / read control signal (W / R control signal) and a row / column address signal (RAS / CAS signal) under the control of the CPU 7A. The W / R control signal and the RAS / CAS signal from the signal generating means 7D are supplied to the memories 6A and 6B to control their writing and reading, and digital video signals (digital red, green and blue signals) are output. Row and column addresses to be written or read are specified.

The head 9 and the printing paper (print medium)
Relative running between them, ON / OFF of the print operation of the head 9, and the like are controlled by the memory controller 7 or a controller associated therewith, but illustration and description thereof are omitted.

The fixed contact r of the changeover switch 4 is connected to the input side of the color video signal converter 10, and an analog color video signal is obtained from the output terminal 11, and this output terminal 11 is used as a monitor receiver. If it is connected (not shown), the contents of the frame memory 6 can be monitored.

Next, the operation of the video printer of this embodiment will be described. First, the video memory 6 for color video signals
Writing to will be described. At this time, CPU 7A
The movable contact m of the changeover switch 4 is connected to the writing side fixed contact w by the changeover control signal. The color video signal for one frame from the input terminal 1 is
After being supplied to the D converter to be converted into a digital color video signal, the digital color video signal is supplied to the RGB decoder 3 to be converted into a digital color video signal for one frame consisting of a digital red signal, a digital green signal and a digital blue signal. Convert.

The digital color video signal for one frame is sent from the signal generating means 7D to the field by the sequential switching of the movable contact m of the changeover switch 5 to the fixed contacts a and b by the switching control signal from the CPU 7A. R / W signal and RAS / C to the memories 6A and 6B
By supplying the AS signal, the digital color video signals of the first field and the second field which compose the digital color video signal for one frame are converted into the field memory 6
It is written in A and 6B. FIG. 7 shows the field memory 6
8A and 8B show the storage states of the digital color video signals of the first and second fields of the digital color video signal of an image to A and 6B. These field memories 6A, 6
B is composed of memory cells arranged in a matrix of M rows × N columns, and digital red, green, and blue pixel signals are stored in each memory cell.

In this manner, the color video signal for one frame stored in the video memory 6 is read out, and the ink ribbons of three colors are used to print the photographic paper (print paper as a print medium by the head 9 as shown in FIG. For example, the operation of printing on photographic paper 10 having sublimation dye ink) will be described. At this time, the movable contact m of the changeover switch 4 is connected to the read side fixed contact r by the changeover control signal from the CPU 7A.

From the signal generating means 7D to the field memory 6
By supplying the R / W signal and the RAS / CAS signal to A and 6B and supplying the changeover control signal from the CPU 7A to the changeover switch 5, the field memory 6 is operated as follows.
Digital red stored in each memory cell of A and 6B,
The green and blue pixel signals are supplied to the YMC converter 8, are converted into yellow, magenta and cyan pixel signals, respectively, and are supplied to the line head 9. As shown in FIG. 8, the line head 9 moves relative to the printing paper 10 in the direction of the arrow to print the image 11 on the printing area 12 of the printing paper 10. Therefore, in the print area 12,
Corresponding to the memory cells of the field memories 6A and 6B,
2M × N color pixels are printed.

First, one of the first columns read from the field memories 6A and 6B, for example, one in which the yellow pixel signals are alternately combined for each pixel signal, is once stored in either of the field memories 6A and 6B. Is stored in the storage area of, and is supplied to the 2M pins of the thermal head 9 at the same time, the line head 9 moves to the position of the first row at the left end of the printing area 12, and Print the yellow pixels of the first row through the ink ribbon. Next, a combination of the second row yellow pixel signals read from the field memories 6A and 6B alternately for each pixel signal is temporarily stored in one of the storage areas of the field memories 6A and 6B. Then, the line head 9 is read out and supplied to the 2M pins of the thermal head 9 at the same time, and the line head 9 is moved to the second area of the printing area 12.
Move to the row position and print the yellow pixels of the second row through the yellow ink ribbon. After that, this operation is repeated, and finally, the field memory 6A,
A combination of the yellow pixel signals of the Nth column read from 6B alternately for each pixel signal is temporarily stored in one of the storage areas of the field memories 6A and 6B, and is read out. Are simultaneously supplied to 2M pins of the thermal head 9, and the line head 9 moves to the position of the Nth row of the printing area 12 to print the yellow pixels of the second row via the yellow ink ribbon. To do. Thereafter, similarly, the magenta pixel signal and the cyan pixel are supplied to the line head 9, and the magenta pixel and the cyan pixel are overlapped with the yellow pixel on the printing area 12 of the printing paper 10 via the magenta and cyan ink ribbons, respectively. The color image 11 is formed by printing.

In the above operation, the case where the color video signal for one frame is printed on the printing paper has been described, but the color video signal for one field can be printed on the printing paper. The operation in that case will be described. First, writing of the color video signal into the video memory 6 will be described. At this time, the movable contact m of the changeover switch 4 is connected to the writing side fixed contact w by the changeover control signal from the CPU 7A. 1 from the input terminal
The field color video signal is supplied to the A / D converter 2 to be converted into a digital color video signal, and then the digital color video signal is supplied to the RGB decoder 3 to obtain a digital red signal, a digital green signal and a digital blue signal. To a digital color video signal for one field.

The digital color video signal for one field is switched to the fixed contact a (or b) of the movable contact m of the changeover switch 5 by the changeover control signal from the CPU 7A, and from the signal generating means 7D to the field memory 6A ( Alternatively, by supplying the R / W signal and the RAS / CAS signal to 6B), a digital color video signal for one field is written in the field memory 6A (or 6B) as shown in FIG.

In this way, the color video signal for one field stored in the field memory 6A (or 6B) is read out, and the ink ribbons of three colors are used to form a print medium by the head 9 as shown in FIG. The operation of printing on the photographic paper will be described. In this case, CPU
The changeover switch 4 is operated by the changeover control signal from 7A.
The movable contact m of is connected to the read side fixed contact r.

From the signal generating means 7D to the field memory 6
By supplying the R / W signal and the RAS / CAS signal to A (or 6B) and supplying the changeover control signal from the CPU 7A to the changeover switch 5, the data is stored in the memory cell of the field memory 6A (or 6B) as follows. The digital color pixel signals thus read out are supplied to the YMC converter 8, converted into yellow, magenta and cyan pixel signals, respectively, and supplied to the line head 9.

First, the field memory 6A (or 6B)
The field memory 6A (or 6B) temporarily combines the M yellow pixel signals read from the first column and the M yellow pixel signals obtained by interpolating the adjacent yellow pixel signals. Is stored in the print area 12 and is read out and supplied to each of the 2M pins of the thermal head 9 at the same time.
To the position of the first row at the left end of the first row, and the yellow pixels of the first row are printed on the printing area 12 through the yellow ink ribbon. Next, the field memory 6A (or 6B)
The field memory 6A (or 6B) is obtained by alternately combining the M yellow pixel signals of the second row read from the M column and the M yellow pixel signals obtained by interpolating the adjacent yellow pixel signals. Is stored in the print head 1 and is read out and supplied to each of the 2M pins of the thermal head 9 at the same time.
2 to the position of the second row, and prints the yellow pixels of the second row on the printing area 12 through the yellow ink ribbon. After that, this operation is repeated, and finally, the Nth read from the field memory 6A (or 6B).
A combination of M yellow pixel signals in a column and M yellow pixel signals obtained by interpolating adjacent yellow pixel signals alternately is once stored in the field memory 6A.
(Or 6B), which is read out and supplied to each of the 2M pins of the thermal head 9 at the same time, and the line head 9 moves to the position of the Nth row of the printing area 12 to print. A second row of yellow pixels is printed in area 12 through the yellow ink ribbon. Thereafter, similarly, the magenta pixel signal and the cyan pixel are supplied to the line head 9, and the magenta pixel and the cyan pixel are overlapped with the yellow pixel on the printing area 12 of the printing paper 10 via the magenta and cyan ink ribbons, respectively. The color image 11 is formed by printing.

Next, FIG. 9 will be described. FIG. 9 shows the printing area 16 of the printing paper 10 of FIG. 8, where T is the length in the horizontal direction and H is the length in the vertical direction, T: H = α: β =
It will be 4: 3. T is, for example, 106.67 (mm), H
Is, for example, 80 (mm). 17 is a unit pixel,
The horizontal length is t, and the vertical length is h. The print area 17 is filled with unit pixels of 2M rows × N columns. In this case, t is, for example, 158.7 (μ
m) and h are, for example, 178.6 (μm). Therefore, 2M = 448 and N = 672.

The storage state of the color video signal in the memory in which the horizontal to vertical aspect ratio of the image when printed is a: b = 16: 9 will be described. In this case, as shown in FIG. 3, each of the field memories 6A and 6B has M rows × N.
A video signal having an aspect ratio of 16: 9 is stored in memory cells of (m−a + 1) rows × N columns among the memory cells of columns, and a rows × N columns and (M−m + 1) (where a = M-
m + 1) rows × N columns of memory cells each having a black band signal 1
3a and 13b are stored. The red, green and blue digital pixel signals are stored in the memory cells of the field memories 6A and 6B.

From the field memories 6A and 6B,
When printed, the horizontal to vertical aspect ratio of the image is a: b
When a color video signal of 16: 9 is read out and supplied to the line head 9 for printing, as shown in FIG. 4, 16: 9 is printed in the printing partial area 16a of the 4: 3 printing area 16 of the printing paper 14. The image 15 of 9: 9 is printed, and the black bands are printed on the upper and lower printing partial areas 16b and 16c.

Therefore, by the control by the CPU 7A of the memory control device 7 and the supply of the W / R control signal and the RAS / CAS signal from the signal generating means 7D to the field memories 6A and 6B, the black of the field memories 6A and 6B in FIG. The band signals 13a and 13b are converted into white band signals, respectively, and then supplied to the line head 9 for printing. FIG.
The printed image partial areas 16b and 16c become white, and the printed image 15 looks better.

Next, when printed, the aspect ratio of a color video signal having an aspect ratio of a: b = 16: 9 in the horizontal to vertical direction of an image is converted to an aspect ratio of α: β = 4: 3. The storage state in the memory will be described.
In this case, as shown in FIG. 5, the field memory 6A,
A vertically extended video signal 12 'having an aspect ratio of 4: 3 is stored in memory cells of M rows × N columns in 6B. The red, green and blue digital pixel signals are stored in the memory cells of the field memories 6A and 6B.

From the field memories 6A and 6B,
When printed, the horizontal to vertical aspect ratio of the image is a: b
The aspect ratio of the color video signal of 16: 9 is α:
When the video signal whose aspect ratio has been converted to β = 4: 3 is read out as it is, and supplied to the line head 9 for printing, as shown in FIG. The stretched image 15 'is printed.

Therefore, when the video signal 12 'stored in the field memories 6A and 6B of FIG. 6 is printed by the CPU 7A of the memory control device 7, as shown in FIG. If the vertical stretched video signal stored in the field memories 6A and 6B of FIG. 5 is converted to 12: 9 so that the aspect ratio of the image returns to 16: 9 when printed. good.

With respect to the printing area 16 of T: H = 4: 3 of the printing paper 10 shown in FIG.
The aspect ratio is a: b = 1 by reducing the length H in the vertical direction.
The field memory 6 is used so that an image of 6: 9 can be obtained.
The video signal 12 'stored in A and 6B may be subjected to aspect ratio conversion processing.

From FIG. 9, the following equation is obtained.

[0037]

## EQU1 ## T: H = 4: 3 = 16: 12 = Nt: 2Mh

Therefore, if H is reduced to (9/12 = 3/4) H, an image having an aspect ratio of 16: 9 can be obtained. Therefore, the following equation is obtained from FIG.

[0039]

[Equation 2] (3/4) H = (3/4) · 2Mh

From the equation (2), the CPU of the memory controller 7
Control by 7A, W / R control signal from signal generating means 7D to field memories 6A and 6B, and RAS / CA
By supplying the S signal, the field memory 6A of FIG.
The number of rows M in the vertical direction of the field video signal 12 'stored in 6B is (3/4) M rows, that is, the pixel signals in the horizontal direction are thinned out every four rows and read out, It is supplied to the line head 9 and the photographic paper 14 is supplied.
The print area 16a of the print area 16 is printed. In this way, an image having an aspect ratio of a: b = 16: 9 is printed in the printing portion area 16a of the printing area 16 of the printing paper 14.

The signal processing and printing of a color video signal having a horizontal to vertical aspect ratio of 16: 9 when printed as described above have been described. The color video signals processed as described above are first and second color video signals. When it is composed of two field video signals, color pixel signals for each row of the field memories 6A and 6B in which the color video signals are stored are alternately read and supplied to the line head 9. Further, when the color video signal processed as described above is a mere field video signal, the adjoining color pixel signals of adjacent rows of the field video signal stored in the field memory 6A or 6B are adjacent to each other. The video signal obtained by interpolating the color pixel signal of the row to be supplied is supplied to the line head.

Next, the function and operation of the CPU 7A of the memory control device 7 of the embodiment shown in FIG. 1 will be described with reference to FIG. In step ST-1, it is determined whether or not to print, and when printing is selected by the operator of the operation unit 7a, the color video signal stored in the frame memory 6 is printed in step ST-2. At this time, whether or not the image has a horizontal-to-vertical aspect ratio of 16: 9 is determined by a monitor by a monitor receiver connected to the input terminal 11 or by a determination signal included in the color video signal. If the result is NO, the normal processing of the color video signal having the horizontal-to-vertical aspect ratio of the image when printed as described at the beginning is performed (step ST-6) and supplied to the head 9. By doing so, printing is performed (step ST-7).

If the result of the determination in step ST-2 is YES, in step ST-3, the color video signal having a horizontal-to-vertical aspect ratio of 16: 9 when printed is connected to the input terminal 11. Whether the video signal has a black band signal or not is judged by the monitor of the monitor receiver or the discrimination signal included in the color video signal. The black band signals located above and below on the screen accompanying the video signal are converted into white band signals (step ST-4), and then the black band signals are converted into white band signals having an aspect ratio of 16: 9. Is supplied to the head 9 to print an image having an aspect ratio of 16: 9 on photographic paper (step ST-5).

When the determination in step ST-3 is NO, that is, when the image is printed, the horizontal-to-vertical aspect ratio of the image is 1.
When the aspect ratio of the color video signal of 6: 9 is converted to 4: 3, the aspect ratio of the color video signal of which aspect ratio is 4: 3 is 16: 9 which is the original aspect ratio. Is converted to (step ST-
8) Then, the color video signal having the aspect ratio of 16: 9 is supplied to the head 9, and the image having the aspect ratio of 16: 9 is printed on the printing paper (step S).
T-9).

[0045]

According to the video printer of the first aspect of the present invention described above, a frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is α: β, and In a video printer having a field video signal read from the frame memory or a printing unit to which the frame video signal is supplied, the horizontal to vertical aspect ratio of the image stored in the frame memory when printed is a: b ( a
/ B> α / β), a black band signal is added to the upper and lower portions of the image of the field video signal or the frame video signal, and the aspect ratio of the image becomes α: β when printed. Since the inverse conversion means for performing the inverse conversion so as to switch the black band signal of the converted video signal thus converted into the white band signal is provided, the horizontal to vertical aspect ratio of the image when printed is a: b (a / b). > Black / white band signals are added to the upper and lower parts of the image of the field video signal or frame video signal of> α / β) so that the aspect ratio of the image becomes α: β when printed. When the converted video signal thus converted is stored in the frame memory, it is possible to obtain an image having an aspect ratio of a: b in the width-to-length direction of a picture that can be printed without black bands above and below it. .

According to the video printer of the second aspect of the present invention described above, a frame memory for storing a field video signal or a frame video signal in which a horizontal-to-vertical aspect ratio of an image when printed is α: β, and the frame memory. In a video printer having a printing means to which the field video signal or the frame video signal read out is supplied, the horizontal-to-vertical aspect ratio of the image stored in the frame memory when printed is a: b (a /
The aspect ratio of the converted video signal is such that the aspect ratio of the field video signal or the frame video signal with b> α / β) is α: β when printed. Since the inverse conversion means for returning the ratio to a: b is provided, the image of the field video signal or the frame video signal in which the aspect ratio of the image when printed is a: b (a / b> α / β) When black band signals are added to the parts corresponding to the top and bottom of, and the converted video signal converted so that the horizontal to vertical aspect ratio of the image when printed is α: β is stored in the frame memory, It is possible to obtain a printable image having a horizontal to vertical aspect ratio of a: b.

According to the video printer of the third aspect of the present invention described above, a frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is α: β, and the frame memory. In a video printer having a printing means to which the field video signal or the frame video signal read out is supplied, the horizontal-to-vertical aspect ratio of the image stored in the frame memory when printed is a: b (a /
b> α / β), the black band signals are added to the upper and lower parts of the image of the field video signal or the frame video signal so that the aspect ratio of the image becomes α: β when printed. The first inverse conversion means for performing an inverse conversion so as to switch the black band signal of the converted video signal converted into the white band signal to the white band signal, and the horizontal to vertical aspect ratio of the image printed when stored in the frame memory is a. : B (a / b
> Α / β) field video signals or frame video signals are aspect ratio-converted so that the horizontal to vertical aspect ratio of the image when printed is α: β. Second to return a to a: b
Since the reverse conversion means is provided, it corresponds to the top and bottom of the image of the field video signal or the frame video signal in which the aspect ratio of the image when printed is a: b (a / b> α / β). When a black band signal is added to the area and the converted video signal converted so that the aspect ratio of the image when printed is α: β is stored in the frame memory, the aspect ratio of horizontal to vertical is displayed. An image with a ratio of a: b can be printed without black bands above and below, and when printed, the aspect ratio of the image becomes a: b (a / b> α / β). Black video signals are added to the parts corresponding to the top and bottom of the image of the field video signal or frame video signal, and the converted video signal converted so that the horizontal to vertical aspect ratio of the image when printed is α: β In frame memory When stored, it is possible to obtain a printable image with a horizontal to vertical aspect ratio of a: b.

[Brief description of drawings]

FIG. 1 is a flow chart of an embodiment of the present invention.

FIG. 2 is a block diagram of the embodiment.

FIG. 3 is an explanatory diagram of a memory.

FIG. 4 is an explanatory diagram of printing.

FIG. 5 is an explanatory diagram of a memory.

FIG. 6 is an explanatory diagram of printing.

FIG. 7 is an explanatory diagram of a memory.

FIG. 8 is an explanatory diagram of printing.

FIG. 9 is an explanatory diagram of printing.

[Explanation of symbols]

 4 changeover switch 5 changeover switch 6 frame memory 6A field memory 6B field memory 7 memory control device 7A CPU 7a operation unit 7D R / W signal and RAS / CAS signal generating means 9 head 14 printing paper 16 printing area

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Miwa Takagi 6-7-35 Kitashinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (3)

[Claims] 1. A frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is α: β, and a field video signal or a frame video read from the frame memory. In a video printer having a print means to which a signal is supplied, the horizontal to vertical aspect ratio of the image stored in the frame memory when printed is a: b (a / b> α / β).
Converted video in which the black-band signal is added to the upper and lower parts of the image of the field video signal or frame video signal to be converted, and the aspect ratio of the image when printed is α: β A video printer provided with an inverse conversion means for performing an inverse conversion so as to switch the black band signal of the signal to a white band signal. 2. A frame memory for storing a field video signal or a frame video signal in which a horizontal to vertical aspect ratio of an image when printed is α: β, and a field video signal or a frame video read from the frame memory. In a video printer having a print means to which a signal is supplied, the horizontal to vertical aspect ratio of the image stored in the frame memory when printed is a: b (a / b> α / β).
The aspect ratio of the converted video signal is converted to a: b so that the aspect ratio of the field video signal or frame video signal when printed becomes α: β when printed. A video printer provided with a reverse conversion means for returning. 3. A frame memory for storing a field video signal or a frame video signal in which a horizontal-to-vertical aspect ratio of an image when printed is α: β, and a field video signal or a frame video read from the frame memory. In a video printer having a print means to which a signal is supplied, the horizontal to vertical aspect ratio of the image stored in the frame memory when printed is a: b (a / b> α / β).
Converted video in which the black-band signal is added to the upper and lower parts of the image of the field video signal or frame video signal to be converted, and the aspect ratio of the image when printed is α: β The first inverse conversion means for performing an inverse conversion so as to switch the black band signal of the signal to the white band signal, and the horizontal to vertical aspect ratio of the image stored in the frame memory when printed is a: b (a / B> α / β)
The aspect ratio of the converted video signal is converted to a: b so that the aspect ratio of the field video signal or frame video signal when printed becomes α: β when printed. A video printer provided with a second reverse conversion means for returning.