JPS6013552B2 - Image playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image reproducing device for reproducing a relatively large area of video, and in particular to an image reproducing device capable of transmitting video information without significantly increasing the amount of video information to be transmitted. At the same time, the aim is to make effective use of the imaging device.

2. Description of the Related Art Conventionally, it has been known to increase the fidelity of a reproduced video by making the video three-dimensional or larger.

However, with the former method, it is difficult to ensure compatibility with current television systems, and the imaging system, transmission system, and reproduction system become quite complex. Furthermore, even with the latter method, it is difficult to achieve compatibility with current television systems.
Furthermore, the amount of video information to be transmitted increases significantly, making it difficult to put it into practical use. Therefore, we focused on the characteristics of the human eye and decided to transmit video information from the center of the subject through the current television transmission system, while reducing the amount of video information from the periphery of the subject. For example, while maintaining compatibility with current television systems, it is possible to play back images on a large screen by simply adding simple equipment.

FIG. 1 is a principle diagram schematically showing one embodiment.

Light from the center lc of the subject 1 is supplied to the center imaging device 4c via the main lens 2 and the half mirror 3. Furthermore, light from the peripheral part lp of the subject 1 passes through the main lens 2, is reflected by the half mirror 3, and is supplied to the peripheral part imaging device 4p. The video signal obtained from the imaging device 4c is sent to the central reproduction cathode ray tube 6c via the signal processing device 5c, while the video signal obtained from the imaging device 4p is sent via the signal processing device 5p. It is integrated with the peripheral area reproduction cathode ray tube 6p. These cathode ray tubes 6c and 6p
The images obtained are combined by the half mirror 7, and as shown in FIG. 2, an image in which the center portion 11c and the peripheral portion 11p are combined is obtained.

At this time, a mask 8 is provided at the center of the reproduction screen of the cathode ray tube 6p, so that only the peripheral image is obtained from the cathode ray tube 6p. The composite image is enlarged and projected onto the screen L by a lens 9, for example. In this embodiment, the frequency band of the central information signal system including the imaging device 4c, the signal processing device 5c, and the cathode ray tube 6c is set to be about the same as that of the current television system, that is, about Komachi Z.

Also, an imaging device 4p, a signal processing device 5p, a cathode ray tube 6p
The frequency band width of the peripheral information signal system including the center information signal system is narrower than that of the center information signal system. Therefore, for example, the signal processing device 5p is provided with a low-pass filter. Here, since narrow band transmission is used, the resolution of the peripheral area is lower than that of the center, but the human eye has the property that its visual acuity for areas other than the point it is focused on rapidly decreases. Therefore, if you use this property, even if the resolution in the peripheral areas of the image decreases, it will not have a significant negative impact on the observer.

On the other hand, since the natural appearance of the screen improves in proportion to the size of the image, the effect of transmitting peripheral video information is great. Note that since the amount of video information in the peripheral area is reduced, this signal can be multiplexed into FM broadcasting and transmitted, or can be time-compressed and inserted into the retrace section of a television signal.

When viewing the image of the cathode ray tube 6c directly without using the screen L, a display panel (such as an EL or plasma display panel) 20 as shown in FIG. 3 is used as a peripheral reproduction device 6p. is used and placed around the outer periphery of the face plate 21 of the cathode ray tube 6c as shown in FIG.

Then, by supplying the output obtained by the signal processing device 5p to the conversion circuit 22, converting it into a signal for display on the panel, and then supplying it to the display panel 201, a desired composite image can be obtained. Incidentally, in such an image reproducing apparatus, in order to obtain an image of the peripheral part of the subject 1, the imaging device 4 for the central part is used.
It is necessary to use an imaging device 4p having an imaging surface with a larger imaging area than that of the imaging device 4p.

It cannot be configured with a device with the same posterior area. Therefore, when one device 4C uses, for example, a 1-inch Pisicon tube, the other device 4p must use a larger Pisicon tube, for example, 1 inch or more. However, in general, the larger the imaging area, the more information can be handled by an imaging device, but in the case of the configuration described above, an imaging device that can handle a large amount of information can be used to capture peripheral images with low resolution. Therefore, this configuration has the disadvantage that the characteristics of the rice bran imaging device cannot be effectively utilized, and is inefficient.

Of course, when imaging devices of different sizes are used, maintenance becomes troublesome because the operating conditions of each device are different.
Since the area ratio between the center and peripheral areas of the reproduced image is determined by the imaging area ratio, there is no freedom in selecting the area ratio. The present invention takes these points into consideration, and in addition to the above-mentioned features, it is possible to utilize the twill image device more effectively.

That is, in the present invention, the imaging device 4c for the central region and the monkey camouflage layer whose imaging area is the same are replaced by the imaging device 4c for the peripheral region.
It can be used as p. The present invention will be described below with reference to the drawings, and parts corresponding to those in FIG. 1 are designated by the same reference numerals.

FIG. 5 shows an embodiment of the present invention.

In the present invention, the same imaging tube as that used in the device 4c for central imaging is used as the imaging tube used in the peripheral imaging device 4p. Therefore, the same bran imaging device as the imaging device 4c is used as the peripheral bran imaging device 4p. As described above, an image of the center lc of the subject 1 is formed on the imaging surface of one imaging device 4c, and an image of the peripheral portion lp of the subject 1 is formed on the imaging surface of the other imaging device 4p. As shown, the distance Lc from the main lens 2 to each imaging surface,
LP (LP=LP, 10 LP2) is made different.

Of course, Lc<LP. Therefore, on the optical path to the imaging device 4p, there is a field lens 10, for example, as shown in the figure.
An optical means 10 consisting of F and a relay lens 10L is interposed so that the position of the actually formed image is rearward of one of the imaging devices 4c.

With the configuration described above, it is possible to utilize the features based on the configuration of FIG. 1 to the fullest while using an imaging device with the same imaging area.

That is, the above-described configuration is compatible with the current broadcasting system, so that the conventional image receiving device is not wasted.

That is, since the image information of the center part is the same as that of the conventional one, the image of the center part can be viewed as before even with a general receiver. [2' It is easy to modify the conventional device.

That is, in order to obtain image information of the peripheral area, it is only necessary to provide a device for obtaining image information of the peripheral area to the conventional device, so that modification is easy. Furthermore, since the video information in the peripheral area is reduced, the image pickup device, signal processing device, reproducing device, etc. for the peripheral video signal system may have a narrow band, that is, a simple configuration. {3] Since the same type of image pickup device 4c as the one image pickup device 4c can be used as the image pickup device 4p for the peripheral area aimed at low resolution, a device with a large green image area is not required, and the imaging speed is increased accordingly. Effective use of the device can be achieved. Maintenance is also easy. [4} The area ratio between the central part and the peripheral part regarding the reproduced image is not determined by the imaging area ratio, but is determined by the ratio of the distances Lc and LP, so there is a degree of freedom in determining the area ratio.

Other embodiments of the invention will be described next. The embodiment shown in FIG. 6 is a case in which an optical low-pass filter 12 is provided between a pair of field lenses 10F, 10F2 instead of an electrical low-pass filter for achieving narrow band characteristics. A fly's eye lens or a minute prism can be used. The example shown in Fig. 7 is a half mirror 3.
This is a case where a perforated mirror 13 is provided instead.

The amount of light reaching the imaging devices 4c and 4p is reduced when the half mirror 3 is used, but not when the perforated mirror 13 is used. This will give you a brighter image. Note that when the perforated mirror 13 is used, although the entire image of the subject 1 is formed on the imaging surface of the monkey image device 4p, the image of the central portion lc is darker than the image of the peripheral portion lp.

As shown in FIG. 8, the light (
This is because the image (shown with diagonal lines) does not reach the imaging surface. but,
There is no problem because the imaging device 4p does not originally use the image of the central portion lc. FIG. 9 shows a pair of prisms 15A, 15
In this example, a prism 15A located on one side of the imaging device 4c has a reflective surface 16 as shown in the diagonal line diagram in FIG.
is formed. FIG. 11 shows an example in which the film 18 is used as the subject 1, that is, the present invention is applied to a telecine device.If the telecine device is configured in this way, the impact of a wide screen, for example, CinemaScope (trademark) may be lost. For example, you can edit it to a VTR.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an image reproducing device used for explaining the present invention;
Figure 2 is a front view of the composite image, Figure 3 is another configuration diagram,
FIG. 4 is a front view of the display panel, FIG. 5 is a system diagram showing an example of the device of the present invention, FIGS. 6 to 10 are views showing other examples of the external part of the present invention, and FIG. FIG. 3 is a system diagram of another embodiment of the invention. 1 is a subject, lc is a center part, lp is a peripheral part, 2 is a main lens, 4c and 4p are monkey image devices, and 10 is an optical means. Figure 2 Figure 3 Figure 4 Figure 1 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11

Claims (1)

[Claims] 1 It has a first imaging device that images the vicinity of the center of the subject, and a second imaging device that images at least the peripheral part of the subject, and the first and second imaging devices each have a large imaging surface. A state in which the same image capturing device is used, and the distance from the main lens that guides the image of the subject to the first imaging device and the distance from the main lens to the second imaging device are different. An image reproducing device configured to form the subject image on each imaging surface of each imaging device.