JPS5945787A - System for transmitting highly minute picture - Google Patents

Abstract

PURPOSE:To transmit a highly minute picture on a conventional television signal transmission line, by splitting a screen into some parts at the transmission side, transmitting them with multiplexing, writing the multiplex signal on a video memory as originally, and displaying it on a highly minute television monitor. CONSTITUTION:A light entering from a lens group 1 is split into four at a transmitter 8 and the image is formed on four faces of pickup sections 4-7 via an image forming lens group 3. An identification signal identifying the part of a screen signal is added to a suitable location of a blanking period of a video signal to video output signals 4S-7S from a camera section 10 having the four faces of a image pickup section, and the result is used as an input signal to a frame or field multiplex section 11. The input signal for four faces of screen's share is switched sequentially at a part of a vertical synchronizing signal in the multiplexing section 11 to form a consecutive TV signal and transmitted to a TV signal transmission line 12. A receiver 9 writes a received multiplex signal from the transmission line 12 into an area corresponding to each of a video memory 14 while discriminating each position according to the identification signal. The written signal is read out as a signal having four times the band of conventional TV signal as a highly minute video signal and displayed on the highly minute TV monitor.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for transmitting high-definition images using a conventional telephony signal transmission path.

Conventional high-definition image transmission devices require a wider band than a normal preview signal transmission path, so the transmission path is expensive and the input/output devices are also complicated and expensive.

In order to compensate for these drawbacks, the present invention divides the screen into several parts on the transmitting side, multiplexes each frame or field, and transmits them, and on the receiving side writes this multiplexed signal back onto the video memory. By refreshing the video memory and displaying it on a high-definition television monitor, it is possible to transmit high-definition images by using a normal preview signal transmission path without using a high-definition image transmission path. Hereinafter, an example in which the number of screen divisions is 4 will be explained in detail with reference to the drawings.

Fig. 1 shows an example of the configuration of the camera section used in the method of the present invention, where ■ is the lens group of the camera, 2 is the prism group, and 3 is the camera lens group.
4.5 and 6.7 are the imaging parts of a conventional telephoto camera, and to be more precise, they are C.
It is divided into four parts, each including a target camera such as an OD and an image pickup tube.

Figure 2 shows the imaging units 4, 5, 6, and 7 in Figure 1 viewed from the prism direction, and the intervals a and b are fixed because the imaging units of a commonly used television camera are used. It is a necessary physical space for adjustment, wiring, etc. Therefore, in order to obtain one continuous screen using the photographing sections 4°5.6 and 7, one screen must be placed on the prism eraser 2.
It has the function of dividing.

FIG. 3 shows an example of the configuration of Prismo group 2, and it is also possible to use a mirror for this part.

Figure 4 does not show the overall configuration of a high-definition image transmission device used in the system of the present invention, but is a 1.1 diagram of one embodiment.
-i transmitting device; 9 indicates receiving device; +, oia camera unit; lettuce group 11 shown in FIGS. 1, 2 and 3;
Built-in Brism group 2, imaging lens t+Y: 3 and 11i image section 4+ 5+ 6+ 7, etc. 1111, Freno or field multiplexing section, 12 is a normal television signal transmission path, 13 is a multiplexed signal separation section, 14 is a video memory with a capacity equivalent to four screens of conventional television signals,
15 is a high-definition television monitor.

Next, these operations will be explained.

In the transmitting device 8, in the camera unit 10, the light entering the lettuce group 1 of the camera shown in FIG. 1 is divided into four by the Grism group 2 as shown in FIG. The image is formed on four imaging units 4.5 and 6.7 shown in FIG. The video output signals 48153+6s and 78 of the camera section 10 having four imaging sections are respectively the same as conventional television signals, and are divided into four imaging sections 4, 5, 6 and 78, respectively, which are the same as conventional television signals. 7 correspond to the images above.

Next, the identification signal inserting units 4c, 5c, 6c, and 7c provided for each of the video output signals 48 to 78 determine which part of the screen the signal belongs to each of the video output signals 48 to 7s. An identification signal for identifying the video image (tj) is added to an appropriate position outside the Plankink period (=J) and is used as an input signal to the frame or field multiplexing section 11.

The own frame or field multiplexing section 11 sequentially switches the input signals for the four sides in the vertical direction X+ signal part,
It is sent to the television signal transmission path I2 as one continuous television signal.

FIG. 5 shows a configuration example 1 in which the output signals of the frame or field multiplexing section 11 are frame multiplexed, and 16.
17.1.8.19 are each frame of the screen divided into four, 20.21.22. 23 is a screen identification signal assigned to that screen.

In the receiving device 9, the multiplexed signal received from the television transmission path 12 is sent to each of the video memories 14 in the multiplexed signal separation unit 13 while determining the position of each using the screen identification signal attached to each claim or each field. The signal is written in the corresponding area, and the output signal is read out as a high-definition video signal with a band four times that of a normal television signal, and displayed on the high-definition television motor.

” The second explanation is for an example of dividing the screen into four parts.
It is clear that the number is not limited to 1 and may generally be divided into a plurality of parts.

As explained above, the present invention is capable of transmitting high-definition images using a conventional television signal transmission path, so it is possible to send a high-definition image between a normal screen and a high-definition image as necessary. It is possible to switch and use it.
By applying it to systems that require both normal screen and high-definition image transmission, such as calligraphy images in video conferencing, there is the advantage that systems that require high-definition images can be configured economically. .

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the configuration of a camera section used in the method of the present invention, FIG. 2 is a diagram of the imaging section of FIG. 1 viewed from the prism direction, FIG. The figure is a Norrock diagram of one embodiment showing the overall configuration of a high-definition image transmission device used in the method of the present invention, and FIG. 5 shows an example of the configuration of the output signal from the freno/field multiplexing section of FIG. 4. It is a diagram. ■ ・・・・・・Camera group, 2 ・・・
...Prisno group, 3...Lettuce group for imaging, 1 to 7...Imaging unit,
8......Transmitting device, 9......Receiving device, IO...Camera section, 11......
Frame or field multiplex section, 12...
Telecommunications signal transmission line, 13...... Multiplex signal separation unit, 14... Video memory,
15...High-definition television monitor.

Claims (1)

[Claims] IX A1 On the i side, the subject image is divided into multiple screens by optical means, each of the divided screens is imaged by a telephoto camera corresponding to each screen, and telephotography is obtained by each telephoto camera. The high-definition video signal is converted into a high-definition video signal in a format that can be transmitted through a normal pre-vision signal transmission line by Freno or field multiplexing, and the high-definition video signal, which has been multiplexed with 11 frames or fields at reception +1111, is A high-definition image characterized in that the signals on both sides of each of the divided TL are separated and recorded in the corresponding video memories, and these are produced as continuous one-screen image signals. Transmission method.