JP3311578B2 - Viewfinder 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 viewfinder device to be provided in a video recording device having a high-speed imaging device.

[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]). If the high-speed image pickup device is mounted on a digital VTR to form a camera-integrated VTR, the magnetic tape displays N child pictures taken at a 1 / N cycle of the field cycle (1/60 second). A composite screen composed of one screen is recorded in the field cycle.

For example, when a four-fold high-speed imaging is performed, as shown in FIG.
/ 240 seconds), four images A to D were taken.
The images are arranged as shown in each of the sub-screens obtained by dividing one screen into four parts, and as video data of one composite screen,
It is recorded on a magnetic tape at a field cycle. Therefore, with a digital VTR equipped with a normal slow playback function,
If the magnetic tape is slow-reproduced at 1/4 the normal speed, video data of the composite screen for one field is stored in the memory, and then the video data of the composite screen from the memory is repeated four times in a field cycle. Read and output. Then, the video data of the composite screen is updated at a cycle (1/15 second) four times the field cycle.

Therefore, a series of video data (A, B, C, D...) In which four sub-screens are arranged on a single time axis is created based on the video data of the composite screen. Thus, a smooth slow reproduction image can be obtained based on the video data.

[0005]

By the way, in a camera-integrated VTR equipped with a high-speed imaging device as described above,
The user performs high-speed imaging while looking through the viewfinder. However, since the high-speed imaging device outputs a composite image obtained by compositing a plurality of child screens, the composite image is displayed as it is on the viewfinder. become. Therefore, the user shoots while viewing the composite image different from the real image to be shot, which causes a problem of a sense of discomfort. Therefore, an object of the present invention is to provide a viewfinder device capable of displaying the same image as a real image to be photographed in a video recording device having a high-speed imaging device.

[0006]

A video recording apparatus to which the viewfinder device of the present invention is to be equipped has a normal screen period.
High-speed capable of outputting video data of a composite screen in which N images taken at a cycle of 1 / N (N is an integer of 2 or more ) of (field cycle) are respectively arranged in a predetermined sub-screen. An imaging device is provided. The viewfinder device according to the present invention comprises a memory means capable of storing video data of N pieces of sub-screens constituting the composite screen, and a memory means sequentially storing the video data of the composite screen output from the high-speed imaging device. From the memory writing control means for writing to the memory and the memory means
A memory read control means for reading the image data of one of the child screen at a specific position on the screen period (field period) in the composite screen, receives supply of the video data read from the memory means, wherein one of the child screen Of the screen cycle
( Display cycle) .

[0007] The viewfinder device is supplied with video data of a composite screen from the high-speed imaging device, and video data for one screen is written to the memory means at a screen cycle (field cycle). In parallel with this, the video data of the child screen at the specific position is read from the memory means at a screen cycle (field cycle), and the video data is supplied to the display means. As a result, only one child screen image in the composite screen is displayed on the display means.

In a specific configuration, the viewfinder device further includes zoom means for performing a zoom process on the video data read from the memory means and supplying it to the display means. According to this configuration, the image of the small screen can be displayed on the display means while being enlarged to the size of the screen.

In another specific configuration, the viewfinder device further performs processing for setting the display position on the display means to the center of the screen on the video data read from the memory means, and supplies the display data to the display means. It has position conversion means. According to this configuration, the image of the small screen can be displayed on the display means at the center position of the screen.

In still another specific configuration, the viewfinder device comprises the above-mentioned zoom means and the display position conversion means in parallel, and outputs an output signal of one of the zoom means and the display position conversion means to the display means. Signal switching means for supplying the signal to the power supply. According to this configuration, the image of the child screen can be displayed on the display means in the size of the screen, or the image of the child screen can be displayed at the center position of the screen, depending on the selection of the user.

[0011]

In the high-speed imaging by the viewfinder according to the present invention, the image of the small screen displayed on the viewfinder is the same as the real image to be photographed, so that the user does not feel discomfort. Absent.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a camera-integrated digital VTR will be specifically described with reference to the drawings. FIG. 1 shows a main configuration of a digital VTR, and is a normal imaging device that shoots at a normal speed.
(1) and a high-speed imaging device (2) that performs high-speed shooting at four times the normal speed are provided. Output signals of the normal imaging device (1) and the high-speed imaging device (2) are respectively supplied to input terminals of a changeover switch (10), and one of the output signals is used as a recording signal as a signal recording circuit in a subsequent stage (not shown). Output to
Since the specific configurations of the normal imaging device (1) and the high-speed imaging device (2) are well known, the description will be omitted.

The output signal of the high-speed imaging device (2) is supplied to a memory (3) capable of storing one frame of video data. The memory (3) is a memory write control circuit.
The writing and reading of the video data are controlled by the control signal supplied from (4) and the memory read control circuit (5) as described later. The video data read from the memory (3) is supplied to a zoom circuit (6) and a display position conversion circuit.
The data is supplied in parallel to (7), and the zoom circuit (6) receives a zoom process at an arbitrary zoom ratio and a process of adjusting the image after the zoom process to the center position of the screen, and the display position conversion circuit (7) After receiving the display position conversion processing for displaying the child screen at the center position of the screen in the same size, the processed signals are input to the signal switching circuit (8). The output signal of the normal imaging device (1) is input to the signal switching circuit (8). The signal switching circuit (8) selects one of the three input signals and supplies it to the viewfinder display (9).

As shown in FIG. 4 (a), the high-speed imaging device (2) captures four sub-pictures A, B, C, and D at a period of 1/240 seconds in an odd field. Then, video data of a composite image obtained by synthesizing these sub-screens is output. In the even field, four sub-screens A ', B', C ', and D' are displayed at a period of 1/240 seconds. And outputs video data of a combined screen obtained by combining these child screens.

As shown in FIG. 2, the memory (3) has a first memory area for storing video data (A, B, C, D) of an odd field of a composite image output from the high-speed imaging device, Video data (A ′,
B ', C', and D ') are provided, and two fields of video data constituting a composite image are sequentially stored in both memory areas by the supply of the write control signal. Written. Further, by the supply of the read control signal, the video data forming the small screen A is read from the first memory area in the odd field, and the small screen A 'is formed from the second memory area in the even field. Of video data to be read out.

As a result, the viewfinder display (9)
As shown in FIGS. 4B and 5B, the image of the child screen A is displayed in the odd field, and the image of the child screen A 'is displayed in the even field.

FIG. 3 shows a specific control procedure of the viewfinder display. First, in step S1, it is determined whether or not the high-speed imaging mode has been set. If the determination is NO, the normal imaging device is operated to set the normal imaging mode. Is output to the viewfinder display. On the other hand, if YES is determined in step S1, the high-speed imaging device is operated to set the high-speed imaging mode, and in step S2, the video data for two fields obtained from the high-speed imaging device is stored in the memory. At the same time, the video data for one field constituting the small screen A or A 'is read from the memory. Then, step S3
It is determined whether or not zoom display is instructed by
In the case of S, the process shifts to step S4 to perform a well-known zoom process to enlarge the size of the child screen to the size of the screen of the viewfinder display, and then outputs the video data of the zoomed image in step S6. On the other hand, if NO is determined in the step S3, the process shifts to a step S5 to perform processing for moving the display position of the child screen to the center of the screen of the viewfinder display, and then, in a step S6. The video data is output.

According to the above-mentioned procedure, the normal imaging mode or the high-speed imaging mode can be set by the user's selection. In the high-speed imaging mode, zoom processing or display position conversion is performed on the image of the small screen to be displayed on the viewfinder. Any of the treatments can be performed.

As described above, according to the viewfinder device of the present invention, the same image as the real image to be captured is displayed on the viewfinder display in the high-speed imaging mode, as in the normal imaging mode. The user does not feel uncomfortable.

The description of the above embodiment is for the purpose of illustrating 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, the memory (3) required for the viewfinder display is not limited to the frame memory, but may be constituted by a field memory or a small-capacity memory capable of storing 1 / N-field video data. is there.

[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 showing a data storage format in a memory.

FIG. 3 is a flowchart illustrating a control procedure of a viewfinder display.

FIG. 4 is a time chart illustrating a viewfinder display operation.

FIG. 5 is a diagram schematically illustrating a composite image obtained from a normal imaging device and an output image to a viewfinder display.

[Explanation of symbols]

 (1) Normal imaging device (2) High-speed imaging device (3) Memory (4) Memory write control circuit (5) Memory read control circuit (6) Zoom circuit (7) Display position conversion circuit (8) Signal switching circuit (9 ) Viewfinder display (10) Switch

Continuation of front page (72) Inventor Mitsuhiro Nishiguchi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Masahiko Tomikawa 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo (56) References JP-A-3-259232 (JP, A) JP-A-63-250291 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 5 / 76-5/956 H04N 5/225

Claims (5)

(57) [Claims] 1. An image data of a composite screen in which N images photographed at a period of 1 / N (N is an integer of 2 or more) of a normal screen period are respectively arranged in a predetermined sub-screen is output . A viewfinder device to be provided in a video recording device that includes a high-speed imaging device capable of recording and that records video data of a series of composite screens output from the high-speed imaging device on a recording medium, wherein the composite screen is configured. Memory means capable of storing video data of one sub- screen out of N sub-screens, and one sub-picture at a specific position in video data of a composite screen output from the high-speed imaging device Memory write control means for sequentially writing video data of a screen to a memory means; memory read control means for reading the video data of the one sub- screen from the memory means at a screen cycle; and video data read from the memory means. Display means for displaying the image of the one sub- screen at a screen cycle in response to the supply of data. 2. A composite screen image data in which N images taken at a period of 1 / N (N is an integer of 2 or more) of a normal screen period are respectively arranged in a predetermined sub-screen is output . A viewfinder device to be provided in a video recording device that includes a high-speed imaging device capable of recording and that records video data of a series of composite screens output from the high-speed imaging device on a recording medium, wherein the composite screen is configured. Memory means capable of storing video data of N sub-screens to be processed, and video data of a composite screen output from the high-speed imaging device in order.
Memory writing control means for writing the next memory means, from the memory means, and a memory read control means for reading the screen period of video data of one of the child screen at a specific position in the composite screen, the image data read from the memory means receives supply, viewfinder device characterized by the image of said one of the child screen equipped with a display means for displaying on the screen period. 3. The viewfinder device according to claim 1, further comprising zoom means for performing zoom processing on the video data read from the memory means and supplying it to a display means. 4. The image processing apparatus according to claim 1, further comprising a display position conversion unit that performs processing for setting a display position on the display unit at the center of the screen on the video data read from the memory unit and supplies the image data to the display unit. The viewfinder device according to claim 1 or 2. 5. A zoom means for performing a zoom process on the video data read from the memory means and outputting the result, and a display position on the display means for the video data read from the memory means is set at the center of the screen. And a signal switching means for supplying an output signal of one of the zoom means and the display position conversion means to the display means. Or the viewfinder device according to claim 2.