JP3253515B2 - High-speed image recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-speed imaging and recording apparatus for synthesizing a plurality of images taken at a high speed by an imaging device such as a CCD onto one screen and recording video data of the synthesized screen on a recording medium. It is about.

[0002]

2. Description of the Related Art Hitherto, for the purpose of generating a slow reproduction image, there has been proposed a high-speed imaging apparatus capable of performing high-speed imaging N times (N is an integer of 2 or more) as usual (Japanese Patent Laid-Open No. 7-212657 [1995]). H
04N5 / 335]). The high-speed imaging apparatus includes a CCD composed of a plurality of solid-state imaging device lines. For example, when performing slow reproduction at a quarter of the normal reproduction speed, FIG.
As shown in (1), an image is picked up in a quarter of the field period (1/240 seconds) using only a quarter region of the CCD. As a result, the video data obtained in a quarter of the field period is an odd line as shown in the figure.
It is composed of an upper data line and a data line on an even line, and a plurality of odd line and even line data constitute one child screen.

Then, four consecutive sub-screens A, B,
C and D are combined into one screen as shown in FIG. 7A to generate a combined screen of an odd field. Each child screen included in the composite screen is constituted by data on odd lines of the CCD. Also, the subsequent four sub-screens A ',
B ', C', and D 'are combined into one screen as shown in FIG. 7B to form a combined screen of even fields. Each child screen included in the composite screen is constituted by data on even lines of the CCD. These composite screens are output at a field cycle.

[0004] Therefore, the above high-speed image pickup apparatus is a digital VT.
R, a camera-integrated VTR is constructed, and the magnetic tape has a composite screen formed by combining four child screens captured at a quarter of the field cycle into one screen. Recorded in cycles.

A digital V having a normal slow playback function
When the magnetic tape is slow-reproduced at 1/4 the normal speed by the TR, the video data of the composite screen for one field is stored in the memory, and then the video data of the composite screen is stored in the memory four times in the field cycle. It is read and output repeatedly.

Therefore, if a series of video data in which four child screens are arranged on a single time axis is created based on the video data of the composite screen, a smooth slowdown is performed based on the video data. A reproduced image can be obtained. Here, when a slow reproduction image is generated by interlaced scanning, first, as shown in FIG. 8A, in the composite screen of the odd field, each line constituting the first child screen A is an odd line, and the second child screen is a second child screen. After generating an image (A + B) of one frame by setting each line constituting the screen B as an even line, FIG.
As shown in (b), one line of an image (C + D) is generated with each line constituting the third small screen C being an odd line and each line constituting the fourth small screen D being an even line.

Next, as shown in FIG. 8C, in the composite screen of the even fields, each line constituting the first sub-screen A 'is represented by an odd line, and each line constituting the second sub-screen B' is represented by After an image (A '+ B') of one frame is generated as an even line, each line constituting the third child screen C 'is changed to an odd line and a fourth child screen D' as shown in FIG. Is an even line, and one frame of image (C ′ +
D ′). The image of each frame generated in this way is displayed at the frame cycle (1/30 second).
(Not shown) and displayed on the screen.

[0008]

In a digital VTR equipped with a conventional high-speed image pickup apparatus, the two-frame images shown in FIGS. 8A and 8B have odd lines of a CCD as shown in FIG. 7A. In contrast to the above data, FIG.
Both of the two-frame images shown in FIG.
It consists of data on even lines of the CD. Therefore,
When the display is switched from the image of FIG. 8B to the image of FIG. 8C, the displayed image moves up and down on the screen with a vertical shift corresponding to the line pitch of the CCD. For example, in the case of a normal quarter playback speed, this vertical movement occurs in a cycle of two frame periods, and becomes more noticeable as the playback speed decreases.

An object of the present invention is to provide a high-speed imaging and recording apparatus in which a displayed image does not move up and down during slow reproduction.

[0010]

A high-speed imaging and recording apparatus according to the present invention performs high-speed imaging at a period of 1 / N (N is an integer of 2 or more) of a field period by an imaging device including a plurality of imaging element lines. A device for arranging N images in a predetermined sub-screen, synthesizing them into one screen, and recording video data of the synthesized screen on a recording medium at a field cycle, and A combined screen of both odd and even fields is generated by using only one of the odd and even lines of the image sensor lines.

In the above-described high-speed imaging and recording apparatus, the combined screen of the odd field and the combined screen of the even field are both included in the plurality of image sensor lines constituting the imaging apparatus.
Generated using only one of the odd line or the even line, and the video data of the composite screen is recorded on a recording medium.
The image of the frame generated based on the composite image of the odd field and the image of the frame generated based on the composite image of the even field are composed of data read from the same image sensor line. Therefore, when the display image is switched at the frame period, no vertical image shift occurs, and the display image does not move up and down.

[0012]

According to the high-speed imaging and recording apparatus of the present invention, it is possible to record video data in which the displayed image does not move up and down during slow reproduction.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a camera-integrated digital VTR will be specifically described below with reference to the drawings. FIG. 1 shows a configuration of a video signal recording system of a digital VTR according to the present invention. An odd line read circuit (2) and an even line read circuit (3) are connected in parallel to an output terminal of a CCD (1). Thus, reading of odd lines from the CCD (1) is controlled, and reading of even lines is controlled.

The video data read by the odd line read circuit (2) and the even line read circuit (3) are supplied to a pair of input terminals of a selector (4). selector
In (4), the switching operation is controlled by a normal / high-speed imaging switching circuit (5). In the normal imaging mode, the output data from the odd line reading circuit (2) and the even line reading circuit (3) are transmitted in the field cycle. And in the high-speed imaging mode, the output data of the odd-numbered line readout circuit (2) is always selected and output as a recording signal to a subsequent signal recording circuit (not shown).

In the high-speed imaging mode, for example, when slow reproduction is performed at a quarter of the normal reproduction speed, as shown in FIG. Is performed in the cycle (1/240 seconds). Here, in the present invention, both the odd field and the even field are read by the odd line reading circuit (2) of FIG. 1 by the odd line (odd lin) of the CCD (1).
Data is read only from e).

Then, four successive sub-screens A, B,
C and D are combined into one screen as shown in FIG. 2A to generate a combined screen of an odd field. As shown in the figure, each sub-picture contained in the composite picture is constituted by data on odd lines of the CCD. Also, the following 4
The two child screens A ', B', C ', and D' are shown in FIG.
A composite screen of an even field is composed by compositing into a single screen. As shown in the figure, each sub-picture contained in the composite picture is constituted by data on odd lines of the CCD. These composite screens are output at a field cycle.

In generating a 1/4 slow reproduction image,
First, as shown in FIG. 3A, in the composite screen of the odd field,
Each line constituting the first child screen A is an odd line,
Each of the lines constituting the child screen B is an even line, and 1
After generating the image (A + B) of the frame, as shown in FIG.
One line of an image (C + D) is generated with each line constituting the fourth child screen D being an even line.

Next, as shown in FIG. 3C, in the composite screen of the even field, each line constituting the first sub-screen A 'is represented by an odd line, and each line constituting the second sub-screen B' is represented by an After an image (A '+ B') of one frame is generated as an even line, each line constituting the third child screen C 'is changed to an odd line and a fourth child screen D' as shown in FIG. Is an even line, and one frame of image (C ′ +
D ′).

The image of each frame generated in this manner is output to a display (not shown) at a frame period (1/30 second). As a result, a slow playback image at a playback speed of 1/4 is displayed on the screen. Here, since all the four-frame images shown in FIG. 3 are composed of data on odd lines of the CCD, for example, FIG.
When the display is switched from the image shown in FIG. 9 to the image shown in FIG. 11C, the displayed image does not move up and down.

In the generation of the 1/8 slow reproduction image, first, as shown in FIG. 4A, of the composite screen of the odd field, each line constituting the first sub-screen A is an odd line,
An interpolation line a obtained by performing an interpolation process on these odd lines is set as an even line, and an image (A + a) of one frame is obtained.
Then, as shown in FIG. 3B, each line constituting the second sub-screen B is an odd line, and an interpolation line b obtained by performing an interpolation process on these odd lines is an even line. (B + b) is generated.

Next, as shown in FIG. 4C, each line constituting the third child screen C is an odd line, and an interpolation line c obtained by performing an interpolation process on these odd lines is an even line. After generating the image (C + c) of the frame,
As shown in (d), each line constituting the fourth child screen D is an odd line, and an interpolation line d obtained by performing an interpolation process on these odd lines is an even line.
(D + d) is generated.

Thereafter, as shown in FIG. 5A, in the composite screen of the even field, each line constituting the first sub-screen A 'is an odd line, and an interpolation obtained by performing an interpolation process of these odd lines. After generating an image (A ′ + a ′) of one frame with the line a ′ as an even line, as shown in FIG.
Each line constituting the second child screen B 'is an odd line, and an interpolation line b' obtained by performing an interpolation process on these odd lines is an even line. One frame image (B '+
b ′).

Next, as shown in FIG. 5C, a third child screen C 'is displayed.
The image (C ′ + c ′) of one frame is generated by setting each of the constituent lines as odd-numbered lines and interpolating lines c ′ obtained by performing interpolation processing on these odd-numbered lines as even-numbered lines. Assuming that each line constituting the fourth child screen D is an odd line and an interpolation line d 'obtained by performing an interpolation process on these odd lines is an even line, an image (D' + d ') of one frame is obtained. Generate.

The image of each frame generated in this manner is output to a display (not shown) at a frame period (1/30 second). As a result, a slow playback image at a 1/8 playback speed is displayed on the screen. Here, the images of the eight frames shown in FIG. 5 and FIG.
Since the display image is composed of data on the odd-numbered line of D, the display image does not move up and down.

Further, in generating a 1/16 slow reproduction image, the image of each frame shown in FIGS. 5 (a) to 5 (d) and FIGS. May be generated, and these images may be output to the display in a frame cycle. Similarly, since these 16-frame images are composed of data on odd lines of the CCD, the displayed image does not move up and down.

The description of the above embodiments is for the purpose of describing the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof.
In addition, the configuration of each part of the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims. For example, at the time of high-speed imaging, CC
It is also possible to adopt a method of reading out only the data of the even-numbered lines from D (1) and generating a composite image of the odd-numbered fields and the even-numbered fields.

[Brief description of the drawings]

FIG. 1 is a camera-integrated digital VTR embodying the present invention.
FIG. 2 is a block diagram illustrating a configuration of a main part of FIG.

FIG. 2 is a diagram illustrating a line configuration of a composite screen of an odd field and an even field.

FIG. 3 is a diagram illustrating a line configuration of four frames during 1/4 slow reproduction.

FIG. 4 is a diagram illustrating the line configuration of the first four frames during 1/8 slow playback.

FIG. 5 is a diagram illustrating a line configuration of the latter four frames of the above.

FIG. 6 is a diagram illustrating a line configuration of a 1/4 region of a CCD.

FIG. 7 is a diagram illustrating a line configuration of a composite screen of an odd field and an even field in a conventional device.

FIG. 8 is a diagram illustrating a line configuration of four frames during 1/4 slow playback in a conventional device.

[Explanation of symbols]

 (1) CCD (2) Odd line readout circuit (3) Even line readout circuit (4) Selector (5) Normal / high-speed imaging switching circuit

──────────────────────────────────────────────────続 き Continuing on the front page (72) Mitsuhiro Nishiguchi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Masahiko Tomikawa 2-5-2 Keihanhondori, Moriguchi-shi, Osaka No. 5 Sanyo Electric Co., Ltd. (56) References JP-A-64-105674 (JP, A) JP-A-7-212657 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 5/76-5/956 H04N 5/335 H04N 5/225-5/243

Claims (1)

(57) [Claims] 1. An image pickup apparatus comprising a plurality of image pickup device lines, wherein 1 / N of a field period (N is an integer of 2 or more).
A high-speed imaging and recording apparatus for arranging N images taken at high speed in a cycle of a single sub-screen and synthesizing them into one screen, and recording video data of the synthesized screen on a recording medium in a field cycle. Generating a composite screen of both an odd field and an even field by using only one of an odd line and an even line among a plurality of imaging element lines constituting an imaging apparatus. Imaging recording device.