JPS58179078A - Transfer system of picture information - Google Patents

Abstract

PURPOSE:To decrease the transfer time, by sorting the picture data to be transferred to a picture terminal into those having a change and others having no change and then synthesizing both data at the picture terminal. CONSTITUTION:The picture data supplied from a picture center 1 are sorted to the information having no change and the information having a change. At first, the information having no change is stored in a picture storage circuit 4 when these two types of information are received at a picture terminal. Then only the data having a change is transferred to the picture terminal from the center 1. When the data is fed to a buffer memory 3, the control information in the data is transferred to a control circuit 6 to read out the picture number contained in the control information. Then the picture data related to the information having no change is designated among those which are previously stored in the circuit 4 and then delivered to a picture synthesizing circuit 5 together with the picture data of the memory 3. The circuit 5 synthesizes both data and displays them to a display 8. As a result, the quantity of transfer can be reduced. This can decrease the time of transfer.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image terminal system such as Videotex.

In the conventional Videotex system, when transmitting image information from an image center to an image terminal: 1. All information regarding one screen was transferred from the image center to the image terminal each time. For this reason, information that does not change on the screen, such as the transmission of traffic information that tells you how busy the road is,
Among the 2WL type information, the information on the map portion that occupies most of the screen area, and the information that indicates the degree of congestion at intersections that occupies only a small portion of the screen due to changing information, only the information on the map portion, By having the information transferred to the image terminal in advance, separately transferring the information on the degree of congestion at the intersection, and combining it on the image terminal side, one 11! Even when it is possible to form IIgI, it is necessary to send all the image information from the image center to the image terminal each time, which has the drawback that the amount of data to be transferred increases and the transfer takes time.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and reduce the amount of image data to be transferred, thereby shortening the transfer time.

The first information transfer system of the present invention divides the image 1N data transferred from the image center to the image terminal into data that changes and data that does not change, and transfers the data that does not change to the image terminal in advance or only during the first transfer. When the data that is accumulated in the memory circuit in the terminal and then changes is transferred from the image center to the image terminal, the data that does not change in the memory circuit is read out according to the control information in the data, and the data that does not change in the memory circuit is read out and the synthesis circuit in the terminal It is characterized in that it can be synthesized with an image of changing data at a time, and the synthesized image can be displayed on a display device.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

As shown in FIG. 1, the image receiving system circuit of the image terminal 10 includes a modem 2, a buffer memory 3 that receives image data from an image center, an image storage circuit 4 that stores the data,
It is composed of an image synthesis circuit 5 for synthesizing images, a control circuit 6 for controlling these circuits, a cathode ray tube control circuit 7 for controlling the display of images on a Brownian monitor, and a plug-in tube 8.

The image data related to traffic information sent from the image center is divided into information that does not change and information that changes, as shown in 2nd v10) and (C). When the image terminal initially receives these two types of information, the keyboard 9
Information that does not change due to control from
) is stored in the image storage circuit 4. Thereafter, by operating the keyboard, a command is issued to transfer only the data that changes among the traffic information, so that only the image data related to the information on the degree of congestion at the intersection shown in FIG. 2(c) is transferred from the image center 1 to the image terminal 10. will be forwarded to. When the data enters the buffer memory, the control information in the data is transferred to the control circuit, and the image number (32 in this case) in the control information is read out and stored in the storage circuit 4 first. The image data related to the information that does not change among the traffic information that has been updated is specified, and is output to the image synthesis circuit 5 together with the image data related to the information that changes in the buffer memory 3, where the image is synthesized, and the image data shown in FIG. An image of the original traffic information is displayed on the display device.

According to the present invention, it is possible to transfer information such as traffic information frequently between an image center and a 1ffl141'R terminal, and to transfer image information whose proportion of changing information is small compared to the conventional method. The same image can be sent with a very small amount of data transferred, and the information transfer time on the image terminal side can be significantly reduced. Furthermore, since the time that the imaging center is connected to a specific terminal is reduced, there is an advantage that the call processing capacity is improved.

Note that the present invention can be applied not only to still images but also to wJ images.

Furthermore, although the above example describes a case where one screen is divided into two and transferred, it is also possible to easily divide and transfer three or more times.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a block diagram showing one embodiment of the present invention.
3A is a diagram showing a traffic information screen as an example of image information transferred from an image center to an image terminal, in which (a) shows all information, (b) shows information that does not change, and (C) shows information that changes. 2...Modem, 51.・Buffer memory,
4... Image storage circuit, 5... Image synthesis circuit, 6
...Control circuit. First solid? Figure 2

Claims (1)

[Claims] Image information in which an image center such as Videotex and an image terminal are connected via a relay line, and the image terminal receives image information mainly sent from the image center and displays the image on the display device of the terminal. In the transfer system, information regarding one image is divided into multiple times and transferred from the image center to the image terminal 7, and the image terminal has a storage circuit for storing image information for each transfer and a plurality of image information inputs on the 11IIIJ side. An image synthesis circuit for synthesizing is provided, and in the image terminal, according to the image control information transferred from the image center, a plurality of pieces of image information for each transfer stored in the memory circuit are read out from the memory circuit, and the image synthesis circuit reads them out from the memory circuit. An image information transfer method characterized by combining images and displaying the combined image on a display device.