JP2000206945A - Method and device for outputting high definition still picture to display device and image pickup unit using them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly maintain the relationship of scanning lines by suppressing the disturbance due to line flickers to a minimum at the time of displaying a still picture on a display device compatible to a normal tevevision signal. SOLUTION: The video signal of a high definition still picture which consists of scanning lines that are divided into (k) pieces of fields in the vertical direction is stored in this device. In this device, an (2m-1)th field is started from the mth field and scanning lines are selected for every (k) and a 2mth field is started from the (k/2+m)th field, and scanning lines are selected for every (k) by making m (1<=m<=k/2; m is an interger) start from 1 and by making it proceed one by one every two fields based on a synchronizing signal. Rearrangement are selected for every field. Thus, the disturbance due to line flickers at the time when the high definition still picture is outputted to an interlacing display device can be suppressed to a minimum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for outputting a high-definition still image to a display device used for video equipment such as a video camera, and an image pickup apparatus using the same. .

[0002]

2. Description of the Related Art In recent years, with the spread of digital cameras, a still image photographing function has been regarded as important in a video camera. On the other hand, video cameras equipped with various still image shooting functions have appeared, but since video cameras are originally intended to record and play back shot images as NTSC or PAL system television signals, The number of effective pixels in the vertical direction of a recorded still image is limited to about 480 or 576 pixels corresponding to the NTSC system and the PAL system. For this reason, the number of pixels of the imaging device that can be used is also limited to some extent.

Since the digital camera is not restricted by television signals, the number of pixels of a recorded still image can be freely determined. For this reason, in some cases, an image pickup device having a large number of pixels is used to output a still image with higher definition than a video camera. Therefore, similarly, in a video camera, a single still image is shot using an image sensor having a large number of pixels, and the still image is divided into a plurality of fields in the NTSC or PAL format, and external devices such as a personal computer and a video printer are used. , And a plurality of fields are synthesized by an external device to obtain one high-definition still image.

Hereinafter, this method will be briefly described. Here, the signal of the NTSC system is output, and the image is picked up using the image sensor of 960 pixels, which has twice the number of effective pixels in the vertical direction as the image sensor for the NTSC system. Considering a method of obtaining a video signal of a high-definition still image and dividing the scanning lines into four fields by 240 lines in the NTSC format, and outputting the divided fields. FIG. 11A shows an image of a video signal of a high-definition still image having 960 scanning lines. Also, for the sake of explanation,
Each scanning line is numbered as shown in FIG. It is described as 1.

(Conventional Example 1) As shown in FIG. 11B, during the first one-field period (= 262.5H, H: horizontal scanning period), No. 1 to No. N out of 960 scan lines
o. 1 to No. 240 are sequentially output, and in the next one field period, No. 240 is output. 241-No. 480 are output, and thereafter, all the 960 scanning lines are output during the four field periods.

(Conventional Example 2) As shown in FIG.
The first field is No. Starting from 1 and 4 on the scan line
No. for each book. 240 lines up to 957 are output, and the next one field is No. Starting from No. 2 The first scanning line number is set to N for each field, such as output up to 958.
o. 1, No. 2, No. 3, No. Move it to 4.

FIG. 13 shows an example of the configuration of a high-definition still image pickup apparatus for realizing the above-mentioned (conventional example 1) and (conventional example 2). An input video signal 2 ′ of a high-definition still image output from the imaging unit 1 and an input synchronization signal 3 ′ synchronized with the input video signal 2 ′ are input to a memory unit 5 and a write address generation unit 4, respectively.

The write address generator 4 generates a write address 4 ′ for the memory means 5 based on the input synchronization signal 3 ′ output from the imaging section 1. An input video signal 2 ′ of valid scanning lines (960 lines) output from the imaging unit 1 is written to the memory unit 5 in accordance with the write address 4 ′ generated by the write address generation unit 4.

Further, the read address generating section 6 includes the image pickup section 1
Independently of the input synchronization signal 3 'output from the
The read address 6 'is output at a timing based on the synchronization signal of the system. From the memory means 5, an output video signal 7 'which is data of the input video signal written according to the read address 6' output from the read address generating section 6.
Is read.

Here, when the address generation by simple increment is performed for both the write address 4 'and the read address 6', the memory means 5 outputs the result (conventional example 1).
(FIG. 11B)
reference). The write address is set to simple increment, and the read address is set to No. Starting from the storage address of No. 1, the address is moved by 4 scanning lines, and 95
7 are read out, and the address to be read out first is No. 7 for each field. 2, No. 3, No.
By sequentially moving the storage address 4 and the storage address, an output as described in (Conventional Example 2) is obtained (see FIG. 12B).

If the video signal output as divided into four fields as described above is synthesized and displayed by a personal computer or a video printer, a video signal output of a high-definition still image can be obtained.

[0012]

However, such a video signal output of a high-definition still image is required when the output video signal is output to a display device compatible with a normal NTSC system such as a viewfinder or a monitor. There are the following disadvantages.

First, in (conventional example 1), 240 scanning line signals input in the first one field period are 1
The area is a quarter of the top of one still image. However, NT
The monitor compatible with the SC system displays a signal consisting of 240 scanning lines that are input in the entire vertical direction of the screen. Become. Similarly, in the second and subsequent fields as well, an area of 1/4 from the top is enlarged four times in the vertical direction and displayed for each field, resulting in a very unsightly image.

[0014] Further, according to (Conventional Example 2), the image is not enlarged in the vertical direction, but this causes an increase in line flicker disturbance. About this, FIG.
This will be described with reference to a schematic diagram of line flicker disturbance shown in FIG. FIG. 14A is an image in a case where an image composed of 960 scanning lines is correctly displayed on a monitor capable of displaying the image. On the other hand, when output is performed as in (Conventional Example 2), the image is displayed as illustrated in FIG. Also,
The display operation in the interlace of the display device will be briefly described with reference to FIG.

Now, in the monitor corresponding to the NTSC system, the scanning line input in the first field is indicated by No. 1 shown in FIG. 1 to No. The scanning line input in the second field at the position indicated by No. 240 241-No. 480
Are displayed at the respective positions. However, since the scanning of the monitor is completed in two fields, the scanning line input in the third field is at the same position as the scanning line in the first field, and the scanning line input in the fourth field is the scanning in the second field. Each will be displayed at the same position as the line. Therefore, as shown in FIG.
o. 1 and No. The group starting with No. 3 is placed at the position of the first field, and No. 2 and No. The group starting from 4 will be displayed at the position of the second field. FIG.
In (b), No. is set for easy viewing. 3 and No. 4 as No. 4.
1 and No. Although it is shown slightly below the position 2, it is actually the same position.

FIG. 14 (b) is compared with FIG. 14 (a). It can be seen that the group starting from 2 is displayed shifted by one scanning line below the original display position shown in FIG. In addition, No. The group starting from No. 3 is shifted upward by two scanning lines. It is displayed in the same position as the group starting from 1. Similarly, No. The group starting from No. 4 is also shifted upward by one scanning line and is no. It is displayed in the same position as the group starting with 2.

As a result, line flicker disturbance occurs in which the display position of the scanning line fluctuates up and down by a maximum of two scanning lines every two fields. In addition, No. in FIG. 2 and No. As is apparent from FIG. 3, since the vertical relationship of the scanning lines is partially reversed, there is a problem that the image becomes unsightly.

The present invention is directed to solving the above-mentioned problems of the prior art, and minimizes line flicker disturbance when displaying on a display device compatible with ordinary television signals, and reduces the number of scanning lines. It is an object of the present invention to provide a method and apparatus for outputting a high-definition still image that can maintain the vertical relationship correctly, and an imaging apparatus using the same.

[0019]

In order to achieve this object, the method and apparatus for outputting a high-definition still image according to the present invention and the method for outputting a high-definition still image in an imaging apparatus using the same include n (n) A video signal input composed of (n is an integer) effective scanning lines is divided into k field video signals composed of (n / k) (where k is an integer) effective scanning lines, and is output. -1) In a field (1 ≦ m ≦ k / 2; m is an integer), starting from the m-th scanning line, every k scanning lines, and the 2m field starting from the (k / 2 + m) -th scanning line. It is characterized in that every k scanning lines are output.

The (2m-1) -th field (1 ≦ m
≤ k / 2; m is an integer), starting at the (k / 2 + m) th scanning line and scanning every k lines, and the second m field is m
It is characterized in that every k scanning lines starting from the first scanning line are output.

The high-definition still image output device has n (n)
Memory means for storing a video signal composed of effective scanning lines of an integer), a write address generator for generating a write address of the memory means based on a first synchronization signal timing synchronized with the video signal input, A read address generator for generating a read address of the memory means based on a second synchronization signal timing different from the first synchronization signal.

The high-definition still image output image pickup apparatus performs image pickup and signal processing by an image pickup device having n (n is an integer) pixels corresponding to the number of effective scanning lines, and includes n effective scanning lines. An imaging unit that outputs a video signal and a first synchronization signal; a memory unit that stores a video signal including n effective scanning lines that is an output of the imaging unit; and a memory that stores the first synchronization signal output timing. A write address generator for generating a write address of the means, and a read address generator for generating a read address of the memory means based on a second synchronization signal timing different from the first synchronization signal. Things.

According to the above method and configuration, the scan lines of the video signal stored in the memory means are rearranged in a predetermined order and input or output by the write address generator or the read address generator for each field. be able to.

[0024]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG. 1A shows an image of a scanning line of a high-definition still image in Embodiment 1 of the present invention, and FIG. 1B shows a positional relationship between the scanning line and each field. FIG. 2A is a schematic diagram illustrating a scanning line image of a high-definition still image, and FIG. 2B is a diagram illustrating an interlaced display image. Also in the first embodiment, NT
Taking the SC method as an example, it is divided into four fields and 96
An example in which a video signal of a high-definition still image composed of 0 effective scanning lines is output in a 4-field period will be described. FIG.
FIG. 1A shows a signal to which a high-definition still image is input, and FIG. 1B shows an output signal. By outputting the signal as shown in FIG. 1B, line flicker disturbance on the display device is minimized. It is possible to minimize. This is shown in FIG.
This will be described with reference to FIG. 2B and FIGS.

FIG. 2A shows an image when correctly displayed on a monitor capable of displaying a high-definition image composed of 960 scanning lines, similarly to FIG. 14A of the conventional example. FIG. 2B is an image of the output shown in FIG. 1B on the display device screen, and FIG.
1 and No. 2 and No. 3 and No. No. 4 is actually displayed at the same position. 2 and No. 4 is No. 4. 1 and No. It is shown shifted below 3.

Here, when comparing FIG. 2A and FIG. Group starting with No. 1 and No. 1 The display position on the screen of the group starting from No. 3 does not change. Group starting with No. 2 and No. The display position on the screen of the group starting from 4 shifts by one scanning line. In this case as well, line flicker disturbance appears, but the vertical fluctuation of one scanning line at maximum is performed every two fields, and the fluctuation amount is only half that in the case of FIG. 14B, that is, (conventional example 2). Also, since there is no reversal of the vertical relationship between the scanning lines, the image is not so unsightly.

By controlling the output order of the scanning lines as described above, line flicker disturbance is minimized when outputting a high-definition still image video signal composed of scanning lines divided into four fields. And the reversal of the vertical relationship of the scanning lines can be prevented.

(Embodiment 2) FIG. 3 is a block diagram showing a read address generator in a high definition still image output apparatus according to Embodiment 2 of the present invention. Here, components having substantially the same functions as those described in FIG. 13 showing the conventional example and having substantially the same functions are denoted by the same reference numerals, and the same applies to the following drawings. In FIG.
2, 3 are input terminals, 2 'is an input video signal, 3' is an input synchronizing signal, 4 is a write address generator, 4 'is a write address, 5 is a memory means, 6 is a read address generator, 6'
Is a read address, 7 is an output terminal, 7 'is an output video signal, 8 is a first counter, 9 is a second counter, 10 is an adder, 11 is a field discriminator, and 12 is a selector.
In the second embodiment, for the sake of explanation, the concept of writing one scanning line to one address in the memory means 5 will be considered.

The second embodiment configured as described above will be described with reference to FIG. The input video signal 2 'of a high-definition still image to be input is output as an NTSC video signal, and is divided into four fields.
A video signal of a fine still image composed of 60 scanning lines is input. A horizontal / vertical synchronization signal synchronized with a video signal of a high-definition still image is input from the input terminal 3 as an input synchronization signal 3 '. However, the cycle of the horizontal / vertical synchronization signal is generally different from the one defined in the NTSC system.

An input video signal 2 'and an input synchronization signal 3' input from the input terminals 2 and 3 are input to the memory means 5 and the write address generator 4, respectively. The write address generating section 4 outputs an address j to the j-th scanning line (j is an integer) of the input video signal 2 'based on the input synchronization signal 3' so that 1 to 9 are output.
Up to 60 addresses are generated by simple increment. 960 valid scanning lines are written in the memory means 5 in accordance with the write address output from the write address generating section 4.

The read address generator 6 generates an address for reading out 240 scanning lines from the memory means 5 in one field period. The first and second counters 8 and 9, the adder 10, It comprises a field discriminator 11, a selector 12, and a synchronization signal generator 13. The synchronizing signal generator 13 generates horizontal and vertical synchronizing signals (indicated as H and V in the figure) having the same period as the NTSC signal.
The field discriminator 11 discriminates between odd and even fields from the horizontal and vertical synchronizing signals output from the synchronizing signal generator 13, and outputs a discrimination signal.

In the first counter 8, the field discriminator 1
The start of the odd field is detected from the output of 1, and “1” is added to the count value (repeated in the range of 1 ≦ m ≦ k / 2). The second counter 9 is the first counter 8
Is used as an initial value, "4" is added to the count value each time the beginning of the horizontal synchronization signal is detected. Selector 12
Is "0" when the output of the field discriminator 11 indicates an odd field, and "2" when the output of the field discriminator 11 indicates an even field.
Are selected and output. The adder 10 adds the output of the selector 12 to the output of the second counter 9 and outputs the result as a read address. FIG. 4 is a timing chart showing the operation of each part.

As shown in FIG. 4, by adopting such a configuration, the read address generating section 6 can provide the first field: No. assuming that the scanning line number is indicated by "No." , 957, 2nd field: No. 3, 7, 11,..., 959 Third field: No. , 958, 4th field: No. 4, 8, 12,..., 960 As will be described below, addresses will be generated such that scanning lines are read out every four lines.

By controlling the memory means 5 and the read address generator 6 as described above, the output terminal 7
An output as shown in (b) appears, and an apparatus that outputs the method described in the embodiment can be realized.

(Embodiment 3) FIG. 5 is a block diagram showing a write address generator in a high definition still image output apparatus according to Embodiment 3 of the present invention. In FIG. 5, 2, 3 are input terminals, 2 'is an input video signal, 3' is an input synchronization signal,
Is a write address generator, 4 'is a write address, 5 is a memory means, 6 is a read address generator, 6' is a read address, 7 is an output terminal, 7 'is an output video signal, 14 is a first counter, 15 Is a second counter, 16 is an adder, 1
7 is a scanning line number determination unit, and 18 is a selector.

In the third embodiment, the same function is provided by controlling the write address instead of changing the order of the scanning lines by controlling the read address described in the second embodiment. Input video signal 2 'from input terminal 2 and input terminal 3 as in the second embodiment.
The horizontal / vertical input synchronization signal 3 'synchronized with the input video signal 2' is input to the memory means 5 and the write address generation unit 4, respectively.

The write address generator 4 generates addresses for writing 960 scanning lines in the memory means 5, and includes first and second counters 14 and 15, an adder 16,
It comprises a scanning line number discriminator 17 and a selector 18.
The first counter 14 is reset by a vertical synchronization signal from the input terminal 3 and counts a horizontal synchronization signal. At this time, the reset timing is determined so that the output of the first counter 14 indicates a valid scanning line number input from the input terminal 2.

The scanning line number discriminator 17 is provided with a first counter 1
The value input from 4 is divided by “4” to determine the remainder, and the value to be selected by the selector 18 is selected according to the result. When the remainder is “1”, the selector “0” is selected. When the remainder is "2", the selector "480" is selected. When the remainder is "3", the selector "240" is selected. When the remainder is "0", the selector "720" is selected. Outputs control signal.

The second counter 15 is reset by the vertical synchronizing signal from the input terminal 3, and increases the count value by "1" every time the horizontal synchronizing signal is input four times.
The selector 18 selects 0, 240, 480, 720 according to the output of the scanning line number discriminator 17 and selects the adder 1
6, the output of the second counter 15 and the output of the selector 18 are added and output as a write address. The operation of these components is shown in the timing chart of FIG.

The memory means 5 includes a write address generator 4
960 valid scanning lines are written in accordance with the output. The read address generator 6 generates horizontal and vertical synchronizing signals having the same period as the NTSC signal, and in each field, based on these synchronizing signals, the first field: address 1, 2, 3,.
., 240 second field: address 241, 242, 243,
..., 480 Third field: address 481, 482, 483
..., 720 fourth field: address 721, 722, 723,
, 960, a read address is generated by simple increment, and all the addresses 1 to 960 are read from the memory means 5 over four fields. As a result, a signal is read from the memory means 5 in a form as shown in FIG.

With such a configuration, the order of the scanning lines input from the input terminal 2 can be rearranged in the same manner as in the second embodiment, and the scanning line sequence is completely the same as that described in the second embodiment. The effect is obtained.

(Embodiment 4) FIG. 7 is a block diagram showing a high-definition still image output apparatus according to Embodiment 4 of the present invention. 7, 2 and 3 are input terminals, 4a is a write address generator, 5a is first memory means, 5b is second memory means, 5c is third memory means, 5d is fourth memory means, and 6a is read. An address generator, 7 is an output terminal, and 19 is a selection means. The video signal of the high-definition still image at the input terminals 2 and 3 and the horizontal / vertical synchronization signal synchronized with the video signal are input to the first to fourth memory means 5a to 5d and the write address generator 4a, respectively. The write address generator 4a determines the No. based on the input horizontal and vertical synchronization signals. (4j-3) → address j No. of the first memory means (4j-2) → address j No. of the third memory means (4j-1) → address j No. of the second memory means 4j → the address j of the fourth memory means, where j: an integer and 1 ≦ j ≦ 240 The address and the control signal are output so as to write only to the address indicated by the following expression. Here, “No.” indicates a scanning line number.

Each scanning line is written into the first to fourth memory means 5a to 5d at the addresses shown above. As a result, 240 scanning lines are written in each memory means. The first to fourth memory means 5a at this time
The image of the scanning line written to 5d is shown in FIG.
(B) corresponds to the image of the scanning line shown as the output of the first to fourth fields. Outputs of the first to fourth memory units 5a to 5d are input to the selection unit 19.

In the read address generator 6a, NT
A horizontal / vertical synchronizing signal having a period equal to the SC signal is generated, and an address for reading out 240 scanning line signals in one field period from the first to fourth memory means 5a to 5d is generated. At the same time, the output of the memory means selected by the selecting means 19 is output for each field, in the first field: the output of the first memory means, the second field: the output of the second memory means, and the third field: the output of the third memory means. Fourth field: Output of fourth memory means A control signal for switching as follows is output. From the first to fourth memory means 5a to 5d, 24
The scanning line signals for each of the 0 lines are read out in the form as shown in FIG.

With this configuration, the same effects as in the second and third embodiments can be obtained. The generation of the address and the control signal in the write address generator 4a is performed as described below. (4j-3) → address j No. of the first memory means (4j-2) → address j No. of the second memory means (4j-1) → address j No. of the third memory means 4j → address j of the fourth memory means, where j: integer, 1 ≦ j ≦ 240 The output of the memory means selected by the selection means 19 is 1
For each field, the first field: the output of the first memory means The second field: the output of the third memory means The third field: the output of the second memory means The fourth field: the output of the fourth memory means However, the same effect can be obtained.

(Embodiment 5) FIG. 8 is a block diagram showing a read address generator in a high-definition still image output imaging apparatus according to Embodiment 5 of the present invention. 8, 4 is a write address generator, 5 is a memory means, 6 is a read address generator, 7 is an output terminal, 8 is a first counter, 9 is a second counter, 10 is an adder, and 11 is a field discriminator. Bowl, 12
Is a selector, 13 is a synchronization signal generator, and 20 is an imaging unit.

The image pickup section 20 has a pixel number in the vertical direction of NTS.
It outputs a video signal of a high-definition still image captured using an image sensor having 960 pixels (for four fields), which is twice as large as the image sensor for the C system, and a horizontal / vertical synchronization signal synchronized with the video signal. However, the cycle of the horizontal / vertical synchronization signal is generally different from the one defined in the NTSC system. The video signal output of the high-definition still image and the horizontal / vertical synchronization signal output from the imaging unit 20 are input to the memory unit 5 and the write address generation unit 4, respectively.

Here, the image pickup unit 2 according to the fifth embodiment
The operation of each unit other than 0 is exactly the same as in the case of the second embodiment, and a description thereof will be omitted. With the configuration described above, it is possible to output a video signal of a high-definition still image obtained by imaging with the imaging unit 20 in the form of FIG.

(Embodiment 6) FIG. 9 is a block diagram showing a write address generator in a high-definition still image output / pickup apparatus according to Embodiment 6 of the present invention. In FIG. 9, 4 is a write address generator, 5 is a memory means, 6 is a read address generator, 7 is an output terminal, 14 is a first counter, 15 is a second counter, 16 is an adder, and 17 is a scanning line. Number judgment part,
Reference numeral 18 denotes a selector, and reference numeral 20 denotes an imaging unit.

In the sixth embodiment, the operation of the imaging unit 20 is the same as that of the fifth embodiment, and the operation of each unit other than the imaging unit 20 is exactly the same as that of the third embodiment. The description is omitted. With such a configuration, a video signal of a high-definition still image obtained by imaging with the imaging unit 20 can be output in the form of FIG.

(Embodiment 7) FIG. 10 is a block diagram showing a high-definition still image output imaging apparatus according to Embodiment 7 of the present invention. In FIG. 10, 4a is a write address generator, 5a is a first memory means, 5b is a second memory means,
c is a third memory means, 5d is a fourth memory means, 6a is a read address generator, 7 is an output terminal, 19 is a selection means,
Reference numeral 0 denotes an imaging unit.

Also in the seventh embodiment, the operation of the imaging unit 20 is the same as that of the fifth embodiment, and the operation of each unit other than the imaging unit 20 is exactly the same as that of the fourth embodiment.
The description is omitted. With such a configuration, a video signal of a high-definition still image obtained by imaging with the imaging unit 20 can be output in the form of FIG.

Although the fourth and seventh embodiments have been described as having four independent memory means, they do not need to be divided into four, and can be controlled independently in two areas. It is also possible to use two memory means which are divided into four sections.
It may be configured using one memory unit divided into regions.

In the description of the first to seventh embodiments, NTS
Although the C method has been described as an example, in the case of the PAL method, since the scanning line positional relationship between the odd field and the even field is reversed, the scanning line numbers read out in the first field and the second field, and The other parts are the same except that the scanning line numbers read out in the third field and the fourth field are reversed.

[0056]

As described above, according to the present invention,
When a video signal composed of input scanning lines divided into k fields is output to a display device corresponding to a television signal such as NTSC or PAL by rearranging and outputting the scanning line order, Line flicker disturbance can be minimized.

Further, by configuring the input video signal composed of scanning lines divided into k fields so as to rearrange the scanning line order via a memory means or the like, a television signal such as NTSC or PAL can be obtained. When output to a display device corresponding to a signal, line flicker interference can be minimized.

Further, the scanning line signal divided into k fields output from the imaging section is arranged so that the scanning line order is rearranged via a memory means or the like.
When output to a display device corresponding to a television signal such as NTSC or PAL, it is possible to minimize line flicker interference.

[Brief description of the drawings]

FIG. 1 (a) is a schematic diagram illustrating a scanning line image of a high-definition still image according to Embodiment 1 of the present invention, and FIG. 1 (b) is a schematic diagram illustrating a positional relationship between scanning lines and respective fields.

FIG. 2A is a diagram illustrating an image of a scanning line of a high-definition still image according to the first embodiment of the present invention, and FIG. 2B is a diagram illustrating an image in which an interlace is displayed;

FIG. 3 is a block diagram showing a read address generator in a high definition still image output device according to a second embodiment of the present invention.

FIG. 4 is a timing chart showing an operation of each unit according to the second embodiment of the present invention;

FIG. 5 is a block diagram showing a write address generator in a high-definition still image output device according to a third embodiment of the present invention.

FIG. 6 is a timing chart showing a state of operation of each unit according to the third embodiment of the present invention;

FIG. 7 is a block diagram showing a high-definition still image output device according to a fourth embodiment of the present invention.

FIG. 8 is a block diagram showing a read address generation unit in the high-definition still image output imaging device according to the fifth embodiment of the present invention.

FIG. 9 is a block diagram showing a write address generator in a high-definition still image output imaging device according to a sixth embodiment of the present invention.

FIG. 10 is a block diagram showing a high-definition still image output imaging device according to a seventh embodiment of the present invention.

11A is a schematic view of a conventional high-definition still image of a scanning line, and FIG. 11B is a schematic diagram illustrating a positional relationship between the scanning line and each field.

12A is a schematic diagram illustrating another conventional high-definition still image of a scanning line, and FIG. 12B is a schematic diagram illustrating a positional relationship between the scanning line and each field.

FIG. 13 is a block diagram showing a configuration of a conventional high-definition still image output imaging device.

14A is a diagram showing an image of a scanning line of a conventional high-definition still image, and FIG. 14B is a diagram showing an image in which interlace is displayed.

FIG. 15 is a diagram showing an image for explaining a display operation in which an interlace is displayed.

[Explanation of symbols]

 1, 20 imaging section 2, 3 input terminal 2 'input video signal 3' input synchronization signal 4, 4a write address generation section 4 'write address 5 memory section 5a first memory section 5b second memory section 5c third memory section 5d 4th memory section 6, 6a read address generation section 6 'read address 7 output terminal 7' output video signal 8, 14 first counter 9, 15 second counter 10, 16 adder 11 field discriminator 12, 18 selector 19 Selection means

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 5/91 H04N 5/91 J 5/93 5/93 Z F term (reference) 5C021 PA79 YA07 YC04 ZA03 5C022 AA13 AB31 AB51 AB68 AC00 5C053 FA08 FA17 FA27 GA14 GB08 HA22 HA33 LA01 LA06 5C082 AA02 AA27 BA20 BA41 BB15 BC06 BC19 CA84 CA85 DA57 DA76 MM10

Claims (6)

[Claims] 1. A video signal input comprising n (n is an integer) effective scanning lines is divided into k-field video signals consisting of (n / k) (k is an integer) effective scanning lines and output. In the (2m-1) -th field (1 ≦ m ≦ k / 2; m is an integer), every k scanning lines starting from the m-th scanning line and the 2m-th field are (k / A method for outputting a high-definition still image to a display device, wherein each of k scanning lines starting from the (2 + m) th scanning line is output. 2. A video signal input consisting of n (n is an integer) effective scanning lines is divided into k-field video signals consisting of (n / k) (k is an integer) effective scanning lines and output. In the (2m-1) -th field (1 ≦ m ≦ k / 2; m is an integer), every k scanning lines starting from the (k / 2 + m) -th scanning line and the 2m-th field Is a method for outputting a high-definition still image to a display device, which outputs k scanning lines starting from the m-th scanning line. 3. A video signal input comprising n (n is an integer) effective scanning lines and a first synchronizing signal input synchronized with a video signal input comprising n effective scanning lines, wherein said n Memory means for storing a video signal composed of effective scanning lines, a write address generator for generating a write address of the memory means based on the first synchronization signal timing, and the first synchronization signal A read address generator for generating a read address of the memory means based on a different second synchronization signal timing, wherein the write address generator and the read address generator are stored in the memory means A video signal composed of n effective scanning lines is transmitted to the (2m-1) -th field (1 ≦
In m ≦ k / 2, where m and k are integers, starting from the m-th scanning line and scanning every k lines, the second m-th field is (k / 2
An address is generated so as to write and read out every k scanning lines starting from the (+ m) th scanning line, and is divided into k field video signals composed of (n / k) effective scanning lines and output. A high-definition still image output device for a display device. 4. The method according to claim 1, wherein the write address generator and the read address generator are arranged in a (2m-1) -th field (1 ≦ m
.Ltoreq.k / 2; m and k are integers), starting from the (k / 2 + m) th scanning line, every k scanning lines, and the 2m field starting from the mth scanning line, every k scanning lines. 4. An apparatus for outputting a high-definition still image to a display device according to claim 3, wherein addresses are generated so as to write and read, respectively. 5. An image pickup device having n (n is an integer) number of pixels corresponding to the number of effective scanning lines performs image pickup and signal processing, and converts a video signal composed of n effective scanning lines and a first synchronization signal. An imaging unit for outputting; a memory unit for storing a video signal composed of n effective scanning lines which is an output of the imaging unit; and a write address of the memory unit based on the first synchronization signal output timing. A write address generator for generating a read address of the memory means based on a second synchronization signal timing different from the first synchronization signal; And the read address generation unit converts the video signal, which is stored in the memory means and includes n effective scanning lines, into the (2m-1) -th field (1 ≦
In m ≦ k / 2, where m and k are integers, starting from the m-th scanning line and scanning every k lines, the second m-th field is (k / 2
An address is generated so as to write and read out every k scanning lines starting from the (+ m) th scanning line, and is divided into k field video signals composed of (n / k) effective scanning lines and output. And a high-definition still image pickup device. 6. The write address generation section and the read address generation section each include a (2m-1) -th field (1 ≦ m)
.Ltoreq.k / 2; m and k are integers), starting from the (k / 2 + m) th scanning line, every k scanning lines, and the 2m field starting from the mth scanning line, every k scanning lines. 6. The high-definition still image capturing apparatus according to claim 5, wherein an address is generated so as to write and read, respectively.